{"id":2521,"date":"2026-09-11T21:09:32","date_gmt":"2026-09-12T02:09:32","guid":{"rendered":"https:\/\/www.cestoil.com\/?page_id=2521"},"modified":"2026-09-11T21:09:32","modified_gmt":"2026-09-12T02:09:32","slug":"ck356n6c-high-temperature-corrosion","status":"publish","type":"page","link":"https:\/\/www.cestoil.com\/es\/case-studies\/ck356n6c-high-temperature-corrosion\/","title":{"rendered":"Northshore CK356N6C: Low-phosphorus corrosion control on high-TAN crude in a vacuum unit"},"content":{"rendered":"<div class=\"wpb-content-wrapper\" id=\"wpb-content-root\"><div class=\"vc_row wpb_row vc_row-fluid\"><div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_raw_code wpb_raw_html wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<style>.cs-page .cs-pdf-download{display:flex;align-items:center;justify-content:space-between;gap:22px;flex-wrap:wrap;padding:24px 28px;margin:0 0 32px;background:#f5f6f8;border-left:3px solid #c9ac63}.cs-page .cs-pdf-download strong{font-size:20px;color:#333}.cs-page .cs-pdf-download p{font-size:15px!important;margin:4px 0 0}.cs-page .cs-pdf-download .cpr-button{margin:0}@media(max-width:600px){.cs-page .cs-pdf-download{padding:22px}.cs-page .cs-pdf-download .cpr-button{width:100%;text-align:center}}<\/style><style>\n.cpr-page{font-family:Lato,Helvetica,Arial,sans-serif;color:#4a4a4a;font-size:17px;line-height:1.75;max-width:1180px;margin:0 auto;padding:34px 0 64px;box-sizing:border-box}\n.cpr-page *{box-sizing:border-box}.cpr-page h1,.cpr-page h2,.cpr-page h3{font-family:Lato,Helvetica,Arial,sans-serif!important;color:#333!important;font-weight:700!important;text-transform:none!important;letter-spacing:normal!important;text-wrap:balance}\n.cpr-page h1{font-size:clamp(32px,3.6vw,46px)!important;line-height:1.16!important;margin:10px 0 22px!important}.cpr-page h2{font-size:30px!important;line-height:1.3!important;margin:0 0 20px!important}.cpr-page h3{font-size:22px!important;line-height:1.35!important;margin:0 0 12px!important}\n.cpr-page p,.cpr-page li{font-family:inherit!important;font-size:17px!important;line-height:1.75!important;font-weight:400;color:#4a4a4a}.cpr-page p{margin:0 0 18px}.cpr-page p:last-child{margin-bottom:0}.cpr-page ul{margin:14px 0 0;padding-left:21px}.cpr-page li{margin-bottom:10px}.cpr-page a{color:#806b34;text-decoration:underline;text-underline-offset:3px}.cpr-page a:hover{color:#333}.cpr-page a:focus-visible{outline:2px solid #806b34;outline-offset:4px}\n.cpr-page .cpr-breadcrumb{font-size:14px;margin-bottom:36px;color:#666;display:flex;flex-wrap:wrap;gap:8px}.cpr-page .cpr-kicker{font-size:13px!important;color:#806b34;font-weight:700;letter-spacing:1px;text-transform:uppercase;margin-bottom:8px}\n.cpr-hero{display:grid;grid-template-columns:1.25fr 1fr;gap:48px;align-items:center;padding:0 0 54px}.cpr-hero .cpr-lead{font-size:19px!important;line-height:1.6!important}.cpr-hero figure{margin:0}.cpr-hero img{width:100%;height:310px;object-fit:cover;border-radius:2px;display:block}.cpr-hero .cpr-image-note{font-size:14px!important;color:#666;margin-top:8px}\n.cpr-page .cpr-button{display:inline-block;background:#c9ac63;color:#333!important;font-weight:700;font-size:16px;line-height:1.4;padding:14px 22px;margin-top:12px;border-radius:2px;text-decoration:none}.cpr-page .cpr-button:hover{background:#333;color:#fff!important}\n.cpr-section{padding:38px 0;border-top:1px solid #dedede;display:grid;grid-template-columns:1fr 2fr;gap:42px}.cpr-section .cpr-body{max-width:780px}.cpr-section .cpr-body p:last-child{margin-bottom:0}.cpr-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.cpr-card{padding:24px;border:1px solid #dedede;background:#fff}.cpr-card p{font-size:16px!important}.cpr-card a{font-weight:700}.cpr-related{padding:32px;background:#f5f6f8;margin:22px 0 34px;border-left:3px solid #c9ac63}.cpr-related ul{margin:0}.cpr-cta{border-top:1px solid #dedede;padding-top:38px}.cpr-cta p{max-width:760px}.cpr-hero.cpr-no-image{grid-template-columns:1fr;max-width:860px}\n@media(max-width:800px){.cpr-hero{gap:24px;grid-template-columns:1fr}.cpr-hero img{height:260px}.cpr-section{grid-template-columns:1fr;gap:8px}.cpr-page h2{font-size:28px!important}}\n@media(max-width:600px){.cpr-page{padding:24px 0 44px}.cpr-page h1{font-size:32px!important}.cpr-page h2{font-size:26px!important}.cpr-page h3{font-size:21px!important}.cpr-page p,.cpr-page li{font-size:16px!important;line-height:1.7!important}.cpr-hero .cpr-lead{font-size:18px!important}.cpr-hero{padding-bottom:32px}.cpr-hero img{height:220px}.cpr-section{padding:28px 0}.cpr-grid{grid-template-columns:1fr;gap:16px}.cpr-card,.cpr-related{padding:22px}.cpr-page .cpr-breadcrumb{margin-bottom:24px}}\n\n.cs-page .cpr-hero{grid-template-columns:1.4fr 1fr;gap:42px}.cs-page h1{font-size:clamp(32px,3.2vw,42px)!important}.cs-page .cpr-hero img{height:310px}.cs-page .cs-observations{background:#f5f6f8;padding:30px;margin-bottom:36px;border-top:3px solid #c9ac63}.cs-page .cs-observations h2{font-size:24px!important}.cs-page .cs-observations ul{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;padding:0;list-style:none}.cs-page .cs-observations li{margin:0;padding-left:16px;border-left:1px solid #c9ac63}.cs-page .cs-note{color:#666;font-size:15px!important;margin-top:20px}.cs-page .cs-source{padding:24px 0;border-top:1px solid #dedede;margin-top:32px}.cs-page .cs-source p{font-size:15px!important}.cs-page .cs-intro{max-width:850px;margin-bottom:36px}.cs-library{border:0;padding:0;margin:0;min-width:0}.cs-library legend{font-size:21px;font-weight:700;color:#333;margin-bottom:20px}.cs-filter{position:absolute;opacity:0;width:1px;height:1px}.cs-filter+label{display:inline-block;border:1px solid #dedede;padding:11px 17px;min-height:44px;margin:0 10px 12px 0;cursor:pointer;font-size:16px;line-height:1.4;color:#333}.cs-filter:checked+label{background:#333;border-color:#333;color:#fff}.cs-filter:focus-visible+label{outline:3px solid #806b34;outline-offset:3px}.cs-cards{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px;margin-top:24px}.cs-card{border:1px solid #dedede;display:flex;flex-direction:column;background:#fff;min-width:0}.cs-card figure{margin:0}.cs-card img{display:block;width:100%;height:190px;object-fit:cover}.cs-card-body{padding:24px;display:flex;flex-direction:column;flex:1}.cs-card h2{font-size:23px!important;line-height:1.35!important;margin:10px 0 16px!important}.cs-card p{font-size:16px!important}.cs-card .cs-read{margin-top:auto;padding-top:18px;font-weight:700}.cs-card .cpr-kicker{font-size:12px!important}.cs-page .cs-count-note{margin:22px 0;font-size:15px!important}#cs-process:checked~.cs-cards .cs-card:not([data-area=\"process\"]),#cs-olefin:checked~.cs-cards .cs-card:not([data-area=\"olefin\"]),#cs-mobility:checked~.cs-cards .cs-card:not([data-area=\"mobility\"]),#cs-polymer:checked~.cs-cards .cs-card:not([data-area=\"polymer\"]){display:none}\n@media(max-width:1000px){.cs-cards{grid-template-columns:repeat(2,minmax(0,1fr))}}\n@media(max-width:800px){.cs-page .cpr-hero{grid-template-columns:1fr}.cs-page .cs-observations ul{grid-template-columns:1fr;gap:16px}.cs-page .cpr-hero img{height:260px}}\n@media(max-width:600px){.cs-page h1{font-size:32px!important}.cs-cards{grid-template-columns:1fr;gap:20px}.cs-card img{height:200px}.cs-card-body,.cs-page .cs-observations{padding:22px}.cs-filter+label{margin-right:6px;font-size:15px;padding:10px 12px}.cs-page .cpr-hero img{height:220px}}\n<\/style><style>#case-ck356n6c-corrosion .cs-results{width:100%;border-collapse:collapse;font-size:16px;line-height:1.55}#case-ck356n6c-corrosion .cs-results th,#case-ck356n6c-corrosion .cs-results td{padding:12px 14px;border-bottom:1px solid #dedede;text-align:left;vertical-align:top}#case-ck356n6c-corrosion .cs-results th{background:#f5f6f8;color:#333;font-weight:700}#case-ck356n6c-corrosion .cs-results caption{text-align:left;font-weight:700;margin-bottom:12px;color:#333}#case-ck356n6c-corrosion .cs-table-scroll{overflow-x:auto}#case-ck356n6c-corrosion .cs-observations strong{display:block;color:#333;font-size:25px;line-height:1.3;margin-bottom:8px}<\/style><article class=\"cpr-page cs-page\" id=\"case-ck356n6c-corrosion\">\n<nav class=\"cpr-breadcrumb\" aria-label=\"Breadcrumb\"><a href=\"\/case-studies\/\">Case Studies<\/a><span aria-hidden=\"true\">\/<\/span><a href=\"\/case-studies\/#refinery-process-solutions\">Refinery Process Solutions<\/a><\/nav>\n<header class=\"cpr-hero\"><div><p class=\"cpr-kicker\">Refinery Process Solutions \u00b7 Case study<\/p><h1>Northshore CK356N6C: Low-phosphorus corrosion control on high-TAN crude in a vacuum unit<\/h1><p class=\"cpr-lead\">A coastal refinery in East China evaluated Cestoil\u2019s Northshore CK356N6C during high-acid crude processing. After the initial film-forming period, average iron in vacuum sidestream 3 fell from 2.98 to 0.84 mg\/kg, with a maintenance dose of 12\u201315 ppm on crude.<\/p><a class=\"cpr-button\" href=\"\/contact\/\">Discuss a similar application<\/a> <a class=\"cpr-button\" href=\"\/request-a-sample\/?product=Northshore%20CK356N6C&amp;area=Refinery%20Process%20Solutions\">Request a sample<\/a><\/div><figure><img src=\"https:\/\/www.cestoil.com\/wp-content\/uploads\/oil-refineries.jpg\" alt=\"Refinery process equipment\" decoding=\"async\"><figcaption class=\"cs-note\">Application image; not a photograph of the customer site.<\/figcaption><\/figure><\/header>\n<aside class=\"cs-pdf-download\" aria-label=\"Case study PDF download\"><div><strong>Download this case study<\/strong><p>Illustrated PDF \u00b7 English \u00b7 2 pages \u00b7 491 KB<\/p><\/div><a class=\"cpr-button\" href=\"https:\/\/www.cestoil.com\/wp-content\/uploads\/Cestoil_CaseStudy_CK356N6C_HighTemp_Corrosion_v1.0.pdf\" download=\"Cestoil_CaseStudy_CK356N6C_HighTemp_Corrosion_v1.0.pdf\" type=\"application\/pdf\">Download case study (PDF)<\/a><\/aside>\n<aside class=\"cs-observations\" aria-label=\"Reported observations\"><h2>Reported observations<\/h2><ul><li><strong>72% lower sidestream-3 iron<\/strong>2.98 \u2192 0.84 mg\/kg: film-forming period compared with the maintenance period.<\/li><li><strong>12\u201315 ppm on crude<\/strong>Maintenance dose following a reported 15-day film-forming treatment at 25\u201330 ppm.<\/li><li><strong>91\u201395% of analysed days<\/strong>Within the technical agreement\u2019s iron limits across vacuum sidestreams 2, 3 and 4 over approximately 12 weeks.<\/li><\/ul><\/aside>\n<section class=\"cpr-section\"><h2>Operating context and objective<\/h2><div class=\"cpr-body\"><p>Following its 2019 turnaround, the refinery\u2019s <strong>5.1 million tonnes\/year crude unit<\/strong> resumed processing a heavy offshore crude slate. Vacuum sidestream total acid number (TAN) was reported at <strong>3\u20135 mg KOH\/g<\/strong>, with elevated sidestream iron indicating a need to investigate and manage naphthenic-acid corrosion.<\/p><p>The refinery needed to bring sidestream iron within its technical-agreement limits while operating on existing metallurgy. Downstream hydroprocessing units also imposed a phosphorus restriction, which constrained inhibitor selection.<\/p><\/div><\/section>\n<section class=\"cpr-section\"><h2>Product and technical service<\/h2><div class=\"cpr-body\"><p><strong>Northshore CK356N6C<\/strong> is Cestoil\u2019s low-phosphorus high-temperature corrosion inhibitor. The supplied case study lists product phosphorus at <strong>\u2264 3 wt%<\/strong> and describes a protective inhibitor\u2013iron complex film. Product phosphorus content is distinct from the phosphorus concentration reaching downstream units.<\/p><p>Cestoil sampled process streams and reviewed corrosion history, sidestream temperatures and metallurgy with the refinery\u2019s technical department. The program used three vacuum-tower injection points: the first and second intermediate pumparounds and the wash-oil reflux. These streams together represented approximately 73% of the crude flow, as reported.<\/p><p>The team monitored iron and TAN on vacuum sidestreams 2, 3 and 4 from <strong>7 April to 1 July 2019<\/strong>, and reviewed trends with the refinery throughout the run. Dose, crude-slate changes and injection distribution were part of the service program.<\/p><\/div><\/section>\n<section class=\"cpr-section\"><h2>Application and treatment sequence<\/h2><div class=\"cpr-body\"><div class=\"cs-table-scroll\"><table class=\"cs-results\"><caption>Reported dosing and injection conditions<\/caption><thead><tr><th scope=\"col\">Stage or location<\/th><th scope=\"col\">Reported condition<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">Start of injection<\/th><td>6 April 2019; neat product through the existing chemical-injection system<\/td><\/tr><tr><th scope=\"row\">Initial film-forming treatment<\/th><td>25\u201330 ppm on crude for a reported 15-day period<\/td><\/tr><tr><th scope=\"row\">Maintenance treatment<\/th><td>12\u201315 ppm on crude from 22 April; 13\u201314 ppm from May<\/td><\/tr><tr><th scope=\"row\">First intermediate pumparound<\/th><td>179 \u00b0C at the proposed injection stream<\/td><\/tr><tr><th scope=\"row\">Second intermediate pumparound<\/th><td>244 \u00b0C at the proposed injection stream<\/td><\/tr><tr><th scope=\"row\">Wash-oil reflux<\/th><td>325 \u00b0C at the proposed injection stream<\/td><\/tr><\/tbody><\/table><\/div><p class=\"cs-note\">Dose figures are based on crude flow. The source does not provide an individual dose for each injection point. Injection-stream temperatures should not be read as a measurement of metal temperature at every protected location.<\/p><\/div><\/section>\n<section class=\"cpr-section\"><h2>Reported iron results<\/h2><div class=\"cpr-body\"><div class=\"cs-table-scroll\"><table class=\"cs-results\"><caption>Average vacuum-sidestream iron: film-forming versus maintenance period<\/caption><thead><tr><th scope=\"col\">Vacuum sidestream<\/th><th scope=\"col\">7\u201321 April 2019<br>Film-forming period<\/th><th scope=\"col\">22 April\u20131 July 2019<br>Maintenance period<\/th><th scope=\"col\">Reported decrease<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">Sidestream 2<\/th><td>0.91 mg\/kg<\/td><td>0.53 mg\/kg<\/td><td>42%<\/td><\/tr><tr><th scope=\"row\">Sidestream 3<\/th><td>2.98 mg\/kg<\/td><td>0.84 mg\/kg<\/td><td>72%<\/td><\/tr><tr><th scope=\"row\">Sidestream 4<\/th><td>3.62 mg\/kg<\/td><td>1.42 mg\/kg<\/td><td>61%<\/td><\/tr><\/tbody><\/table><\/div><p>During film formation, sidestream-3 iron was reported at <strong>2.2\u20134.1 mg\/kg<\/strong> and sidestream-4 iron at <strong>2.9\u20134.3 mg\/kg<\/strong>. Within a week of switching to maintenance dosing, the reported ranges were <strong>0.4\u20130.9 mg\/kg<\/strong> and <strong>0.9\u20131.7 mg\/kg<\/strong>, respectively. Two one-day excursions on 27 and 30 May cleared by the next analysis.<\/p><p>Average sidestream TAN remained around <strong>3.0\u20133.4 mg KOH\/g<\/strong>, with peaks above 4 in April and mid-June, while iron stayed lower. The refinery interpreted the trend as evidence of treatment performance under continued acidic-feed conditions.<\/p><p class=\"cs-note\">These figures compare two treatment periods, rather than an untreated baseline with a treated period. Iron is an indirect corrosion indicator: a 72% decrease in iron is not a direct measurement of a 72% reduction in corrosion rate. Inspection or probe data and operating conditions should be reviewed alongside the iron trends. Percentage changes are rounded as reported in the source.<\/p><\/div><\/section>\n<section class=\"cpr-section\"><h2>Performance against the technical agreement<\/h2><div class=\"cpr-body\"><div class=\"cs-table-scroll\"><table class=\"cs-results\"><caption>Analysed days within the refinery\u2019s iron limits, 7 April\u20131 July 2019<\/caption><thead><tr><th scope=\"col\">Vacuum sidestream<\/th><th scope=\"col\">Analysed days within the agreed limit<\/th><\/tr><\/thead><tbody><tr><th scope=\"row\">Sidestream 2<\/th><td>94.9%<\/td><\/tr><tr><th scope=\"row\">Sidestream 3<\/th><td>94.7%<\/td><\/tr><tr><th scope=\"row\">Sidestream 4<\/th><td>91.1%<\/td><\/tr><\/tbody><\/table><\/div><p>The refinery\u2019s technical department recorded the agreement as met and concluded that CK356N6C supported high-temperature naphthenic-acid corrosion control and longer operating cycles.<\/p><p class=\"cs-note\">The supplied summary does not list the numerical iron limits, the number of analysed days for each stream or downstream phosphorus measurements. The percentages refer to days with analysis, not every calendar day.<\/p><\/div><\/section>\n<section class=\"cpr-section\"><h2>Operational value<\/h2><div class=\"cpr-body\"><p>The reported objective was to control sidestream iron within the refinery\u2019s agreement while meeting its downstream phosphorus restriction. The refinery recorded that objective as achieved at a <strong>12\u201315 ppm maintenance dose on crude<\/strong>, using the existing injection system and vacuum-section metallurgy.<\/p><p>The customer report provides <strong>no monetary savings figure<\/strong>. This case therefore does not assign a value to avoided maintenance, equipment replacement or downtime.<\/p><\/div><\/section>\n<section class=\"cpr-section\"><h2>Applying the findings<\/h2><div class=\"cpr-body\"><p>Allow for an initial film-forming period before evaluating maintenance performance. In this trial, the initial dose was approximately twice the maintenance dose. Review any dosing plan against the unit\u2019s metallurgy, stream temperatures, crude TAN and downstream phosphorus limit.<\/p><p>The refinery recommended linking dose to crude TAN as crude slates change and evaluating carrier-stream injection to improve dispersion. The documented trial used neat injection; the supplied report does not quantify a dose saving from the proposed carrier-stream approach.<\/p><p>Track iron against TAN on the same sidestream, together with chemical dose, crude slate and operating conditions. Pair stream analysis with inspection or probe measurements when assessing protection and long-term operating value.<\/p><\/div><\/section>\n<aside class=\"cpr-related\"><h2>Related product category<\/h2><p><a href=\"\/products-applications\/refinery-process-solutions\/high-temperature-corrosion-inhibitors\/\">High-Temperature Corrosion Control<\/a> \u00b7 <a href=\"\/products-applications\/refinery-process-solutions\/\">Refinery Process Solutions<\/a><\/p><h2>Related technical solution<\/h2><p><a href=\"\/solutions\/naphthenic-acid-corrosion-management\/\">Naphthenic Acid Corrosion Management<\/a><\/p><\/aside>\n<section class=\"cpr-cta\"><h2>Discuss a similar application<\/h2><p>Share your crude and sidestream TAN history, candidate injection temperatures, equipment metallurgy, inspection or probe findings, sidestream iron records and downstream phosphorus limits. Cestoil\u2019s technical team can help define injection points, a film-forming plan and a monitored maintenance program.<\/p><a class=\"cpr-button\" href=\"\/contact\/\">Contact our technical team<\/a><\/section>\n<aside class=\"cs-pdf-download\" aria-label=\"Case study PDF download\"><div><strong>Download this case study<\/strong><p>Illustrated PDF \u00b7 English \u00b7 2 pages \u00b7 491 KB<\/p><\/div><a class=\"cpr-button\" href=\"https:\/\/www.cestoil.com\/wp-content\/uploads\/Cestoil_CaseStudy_CK356N6C_HighTemp_Corrosion_v1.0.pdf\" download=\"Cestoil_CaseStudy_CK356N6C_HighTemp_Corrosion_v1.0.pdf\" type=\"application\/pdf\">Download case study (PDF)<\/a><\/aside>\n<footer class=\"cs-source\"><p>Source: Customer usage report, technical department, vacuum section of a 5.1 million tonnes\/year crude unit at a coastal refinery in East China, April\u2013July 2019, as summarised in Cestoil case study CS-CDU-CK356N6C-2026A, v1.0. Figures are reported by the customer; period-average iron values are taken from Figure 2 in the supplied PDF.<\/p><p>Performance reflects specific field-trial conditions. Actual results may vary with feed quality and operating conditions. Users are responsible for determining product suitability for their operations.<\/p><a href=\"\/case-studies\/\">Explore all case studies<\/a><\/footer>\n<\/article>\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Explore Northshore CK356N6C low-phosphorus corrosion control: sidestream iron results, 12\u201315 ppm maintenance dosing, technical service and the case-study PDF.<\/p>","protected":false},"author":2,"featured_media":0,"parent":669,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_monsterinsights_skip_tracking":false,"footnotes":""},"class_list":["post-2521","page","type-page","status-publish","hentry","description-off"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO Pro 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"Explore Northshore CK356N6C low-phosphorus corrosion control: sidestream iron results, 12\u201315 ppm maintenance dosing, technical service and the case-study PDF.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/www.cestoil.com\/es\/case-studies\/ck356n6c-high-temperature-corrosion\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO Pro (AIOSEO) 5.0.1.1\" \/>\n\t\t<meta property=\"og:locale\" content=\"es_ES\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Cestoil Chemical Inc.\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"CK356N6C High-Temperature Corrosion Case Study | Cestoil\" \/>\n\t\t<meta property=\"og:description\" content=\"Explore Northshore CK356N6C low-phosphorus corrosion control: sidestream iron results, 12\u201315 ppm maintenance dosing, technical service and the case-study PDF.\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/www.cestoil.com\/es\/case-studies\/ck356n6c-high-temperature-corrosion\/\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/www.cestoil.com\/wp-content\/uploads\/cestoil-home-hero-2026-desktop.jpg\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/www.cestoil.com\/wp-content\/uploads\/cestoil-home-hero-2026-desktop.jpg\" \/>\n\t\t<meta property=\"og:image:width\" content=\"1280\" \/>\n\t\t<meta property=\"og:image:height\" content=\"720\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2026-09-12T02:09:32+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2026-09-12T02:09:32+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"CK356N6C High-Temperature Corrosion Case Study | Cestoil\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Explore Northshore CK356N6C low-phosphorus corrosion control: sidestream iron results, 12\u201315 ppm maintenance dosing, technical service and the case-study PDF.\" \/>\n\t\t<meta name=\"twitter:image\" content=\"https:\/\/www.cestoil.com\/wp-content\/uploads\/cestoil-home-hero-2026-desktop.jpg\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.cestoil.com\\\/es\\\/case-studies\\\/ck356n6c-high-temperature-corrosion\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.cestoil.com\\\/es#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.cestoil.com\\\/es\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.cestoil.com\\\/es\\\/case-studies\\\/#listItem\",\"name\":\"Case Studies\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.cestoil.com\\\/es\\\/case-studies\\\/#listItem\",\"position\":2,\"name\":\"Case Studies\",\"item\":\"https:\\\/\\\/www.cestoil.com\\\/es\\\/case-studies\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.cestoil.com\\\/es\\\/case-studies\\\/ck356n6c-high-temperature-corrosion\\\/#listItem\",\"name\":\"Northshore CK356N6C: Low-phosphorus corrosion control on high-TAN crude in a vacuum unit\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.cestoil.com\\\/es#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.cestoil.com\\\/es\\\/case-studies\\\/ck356n6c-high-temperature-corrosion\\\/#listItem\",\"position\":3,\"name\":\"Northshore CK356N6C: Low-phosphorus corrosion control on high-TAN crude in a vacuum unit\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.cestoil.com\\\/es\\\/case-studies\\\/#listItem\",\"name\":\"Case Studies\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.cestoil.com\\\/es\\\/#organization\",\"name\":\"Cestoil Chemical Inc.\",\"description\":\"Canadian specialty chemical company serving energy, materials and data center applications.\",\"url\":\"https:\\\/\\\/www.cestoil.com\\\/es\\\/\",\"email\":\"info@cestoil.com\",\"telephone\":\"+12898075007\",\"logo\":{\"@type\":\"ImageObject\",\"url\":\"https:\\\/\\\/www.cestoil.com\\\/wp-content\\\/uploads\\\/logo-new-floating.png\",\"@id\":\"https:\\\/\\\/www.cestoil.com\\\/es\\\/case-studies\\\/ck356n6c-high-temperature-corrosion\\\/#organizationLogo\",\"width\":208,\"height\":60},\"image\":{\"@id\":\"https:\\\/\\\/www.cestoil.com\\\/es\\\/case-studies\\\/ck356n6c-high-temperature-corrosion\\\/#organizationLogo\"},\"sameAs\":[\"https:\\\/\\\/www.linkedin.com\\\/company\\\/cestoil-chemical-inc.\"],\"address\":{\"@id\":\"https:\\\/\\\/www.cestoil.com\\\/es\\\/#postaladdress\",\"@type\":\"PostalAddress\",\"streetAddress\":\"Unit 9, 175 West Beaver Creek Rd\",\"postalCode\":\"L4B 3M1\",\"addressLocality\":\"Richmond Hill\",\"addressRegion\":\"ON\",\"addressCountry\":\"CA\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.cestoil.com\\\/es\\\/case-studies\\\/ck356n6c-high-temperature-corrosion\\\/#webpage\",\"url\":\"https:\\\/\\\/www.cestoil.com\\\/es\\\/case-studies\\\/ck356n6c-high-temperature-corrosion\\\/\",\"name\":\"CK356N6C High-Temperature Corrosion Case Study | Cestoil\",\"description\":\"Explore Northshore CK356N6C low-phosphorus corrosion control: sidestream iron results, 12\\u201315 ppm maintenance dosing, technical service and the case-study PDF.\",\"inLanguage\":\"es-ES\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.cestoil.com\\\/es\\\/#website\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.cestoil.com\\\/es\\\/case-studies\\\/ck356n6c-high-temperature-corrosion\\\/#breadcrumblist\"},\"datePublished\":\"2026-09-11T21:09:32-05:00\",\"dateModified\":\"2026-09-11T21:09:32-05:00\"},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.cestoil.com\\\/es\\\/#website\",\"url\":\"https:\\\/\\\/www.cestoil.com\\\/es\\\/\",\"name\":\"Cestoil Chemical Inc.\",\"description\":\"Specialty chemistry for energy, materials and data centers\",\"inLanguage\":\"es-ES\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.cestoil.com\\\/es\\\/#organization\"}}]}\n\t\t<\/script>\n\t\t<!-- All in One SEO Pro -->\r\n\t\t<title>CK356N6C High-Temperature Corrosion Case Study | Cestoil<\/title>\n\n","aioseo_head_json":{"title":"CK356N6C High-Temperature Corrosion Case Study | Cestoil","description":"Explore Northshore CK356N6C low-phosphorus corrosion control: sidestream iron results, 12\u201315 ppm maintenance dosing, technical service and the case-study PDF.","canonical_url":"https:\/\/www.cestoil.com\/es\/case-studies\/ck356n6c-high-temperature-corrosion\/","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"BreadcrumbList","@id":"https:\/\/www.cestoil.com\/es\/case-studies\/ck356n6c-high-temperature-corrosion\/#breadcrumblist","itemListElement":[{"@type":"ListItem","@id":"https:\/\/www.cestoil.com\/es#listItem","position":1,"name":"Home","item":"https:\/\/www.cestoil.com\/es","nextItem":{"@type":"ListItem","@id":"https:\/\/www.cestoil.com\/es\/case-studies\/#listItem","name":"Case Studies"}},{"@type":"ListItem","@id":"https:\/\/www.cestoil.com\/es\/case-studies\/#listItem","position":2,"name":"Case Studies","item":"https:\/\/www.cestoil.com\/es\/case-studies\/","nextItem":{"@type":"ListItem","@id":"https:\/\/www.cestoil.com\/es\/case-studies\/ck356n6c-high-temperature-corrosion\/#listItem","name":"Northshore CK356N6C: Low-phosphorus corrosion control on high-TAN crude in a vacuum unit"},"previousItem":{"@type":"ListItem","@id":"https:\/\/www.cestoil.com\/es#listItem","name":"Home"}},{"@type":"ListItem","@id":"https:\/\/www.cestoil.com\/es\/case-studies\/ck356n6c-high-temperature-corrosion\/#listItem","position":3,"name":"Northshore CK356N6C: Low-phosphorus corrosion control on high-TAN crude in a vacuum unit","previousItem":{"@type":"ListItem","@id":"https:\/\/www.cestoil.com\/es\/case-studies\/#listItem","name":"Case Studies"}}]},{"@type":"Organization","@id":"https:\/\/www.cestoil.com\/es\/#organization","name":"Cestoil Chemical Inc.","description":"Canadian specialty chemical company serving energy, materials and data center applications.","url":"https:\/\/www.cestoil.com\/es\/","email":"info@cestoil.com","telephone":"+12898075007","logo":{"@type":"ImageObject","url":"https:\/\/www.cestoil.com\/wp-content\/uploads\/logo-new-floating.png","@id":"https:\/\/www.cestoil.com\/es\/case-studies\/ck356n6c-high-temperature-corrosion\/#organizationLogo","width":208,"height":60},"image":{"@id":"https:\/\/www.cestoil.com\/es\/case-studies\/ck356n6c-high-temperature-corrosion\/#organizationLogo"},"sameAs":["https:\/\/www.linkedin.com\/company\/cestoil-chemical-inc."],"address":{"@id":"https:\/\/www.cestoil.com\/es\/#postaladdress","@type":"PostalAddress","streetAddress":"Unit 9, 175 West Beaver Creek Rd","postalCode":"L4B 3M1","addressLocality":"Richmond Hill","addressRegion":"ON","addressCountry":"CA"}},{"@type":"WebPage","@id":"https:\/\/www.cestoil.com\/es\/case-studies\/ck356n6c-high-temperature-corrosion\/#webpage","url":"https:\/\/www.cestoil.com\/es\/case-studies\/ck356n6c-high-temperature-corrosion\/","name":"CK356N6C High-Temperature Corrosion Case Study | Cestoil","description":"Explore Northshore CK356N6C low-phosphorus corrosion control: sidestream iron results, 12\u201315 ppm maintenance dosing, technical service and the case-study PDF.","inLanguage":"es-ES","isPartOf":{"@id":"https:\/\/www.cestoil.com\/es\/#website"},"breadcrumb":{"@id":"https:\/\/www.cestoil.com\/es\/case-studies\/ck356n6c-high-temperature-corrosion\/#breadcrumblist"},"datePublished":"2026-09-11T21:09:32-05:00","dateModified":"2026-09-11T21:09:32-05:00"},{"@type":"WebSite","@id":"https:\/\/www.cestoil.com\/es\/#website","url":"https:\/\/www.cestoil.com\/es\/","name":"Cestoil Chemical Inc.","description":"Specialty chemistry for energy, materials and data centers","inLanguage":"es-ES","publisher":{"@id":"https:\/\/www.cestoil.com\/es\/#organization"}}]},"og:locale":"es_ES","og:site_name":"Cestoil Chemical Inc.","og:type":"article","og:title":"CK356N6C High-Temperature Corrosion Case Study | Cestoil","og:description":"Explore Northshore CK356N6C low-phosphorus corrosion control: sidestream iron results, 12\u201315 ppm maintenance dosing, technical service and the case-study PDF.","og:url":"https:\/\/www.cestoil.com\/es\/case-studies\/ck356n6c-high-temperature-corrosion\/","og:image":"https:\/\/www.cestoil.com\/wp-content\/uploads\/cestoil-home-hero-2026-desktop.jpg","og:image:secure_url":"https:\/\/www.cestoil.com\/wp-content\/uploads\/cestoil-home-hero-2026-desktop.jpg","og:image:width":1280,"og:image:height":720,"article:published_time":"2026-09-12T02:09:32+00:00","article:modified_time":"2026-09-12T02:09:32+00:00","twitter:card":"summary_large_image","twitter:title":"CK356N6C High-Temperature Corrosion Case Study | Cestoil","twitter:description":"Explore Northshore CK356N6C low-phosphorus corrosion control: sidestream iron results, 12\u201315 ppm maintenance dosing, technical service and the case-study PDF.","twitter:image":"https:\/\/www.cestoil.com\/wp-content\/uploads\/cestoil-home-hero-2026-desktop.jpg"},"aioseo_meta_data":{"post_id":"2521","title":"CK356N6C High-Temperature Corrosion Case Study | Cestoil","description":"Explore Northshore CK356N6C low-phosphorus corrosion control: sidestream iron results, 12\u201315 ppm maintenance dosing, technical service and the case-study PDF.","keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":"","og_title":"CK356N6C High-Temperature Corrosion Case Study | Cestoil","og_description":"Explore Northshore CK356N6C low-phosphorus corrosion control: sidestream iron results, 12\u201315 ppm maintenance dosing, technical service and the case-study PDF.","og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":true,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":"CK356N6C High-Temperature Corrosion Case Study | Cestoil","twitter_description":"Explore Northshore CK356N6C low-phosphorus corrosion control: sidestream iron results, 12\u201315 ppm maintenance dosing, technical service and the case-study PDF.","schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"limit_modified_date":false,"open_ai":null,"created":"2026-09-12 02:09:32","updated":"2026-09-12 02:12:04","focus_keyword":null,"additional_keywords":null,"truseo_locale":null,"ai":null,"breadcrumb_settings":null,"seo_analyzer_scan_date":"2026-09-12 02:10:16"},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t<a href=\"https:\/\/www.cestoil.com\/es\" title=\"Home\">Home<\/a>\n<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t<a href=\"https:\/\/www.cestoil.com\/es\/case-studies\/\" title=\"Case Studies\">Case Studies<\/a>\n<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\tNorthshore CK356N6C: Low-phosphorus corrosion control on high-TAN crude in a vacuum unit\n<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/www.cestoil.com\/es"},{"label":"Case Studies","link":"https:\/\/www.cestoil.com\/es\/case-studies\/"},{"label":"Northshore CK356N6C: Low-phosphorus corrosion control on high-TAN crude in a vacuum unit","link":"https:\/\/www.cestoil.com\/es\/case-studies\/ck356n6c-high-temperature-corrosion\/"}],"_links":{"self":[{"href":"https:\/\/www.cestoil.com\/es\/wp-json\/wp\/v2\/pages\/2521","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.cestoil.com\/es\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.cestoil.com\/es\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.cestoil.com\/es\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cestoil.com\/es\/wp-json\/wp\/v2\/comments?post=2521"}],"version-history":[{"count":1,"href":"https:\/\/www.cestoil.com\/es\/wp-json\/wp\/v2\/pages\/2521\/revisions"}],"predecessor-version":[{"id":2522,"href":"https:\/\/www.cestoil.com\/es\/wp-json\/wp\/v2\/pages\/2521\/revisions\/2522"}],"up":[{"embeddable":true,"href":"https:\/\/www.cestoil.com\/es\/wp-json\/wp\/v2\/pages\/669"}],"wp:attachment":[{"href":"https:\/\/www.cestoil.com\/es\/wp-json\/wp\/v2\/media?parent=2521"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}