{"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":"2026-09-12T14:51:20","modified_gmt":"2026-09-12T19:51:20","slug":"corrosion-a-haute-temperature-de-lalliage-ck356n6c","status":"publish","type":"page","link":"https:\/\/www.cestoil.com\/fr\/case-studies\/ck356n6c-high-temperature-corrosion\/","title":{"rendered":"Northshore CK356N6C : Contr\u00f4le de la corrosion \u00e0 haute temp\u00e9rature"},"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>\n.ccr-case{max-width:1120px;margin:36px auto 70px;padding:0 24px;color:#414b53;font:18px\/1.75 Lato,Arial,sans-serif}\n.ccr-case *{box-sizing:border-box}.ccr-case h1,.ccr-case h2{color:#253d4c;font-family:inherit;font-weight:700;text-transform:none;letter-spacing:normal}\n.ccr-case h1{font-size:clamp(32px,4vw,46px);line-height:1.18;max-width:980px;margin:16px 0 24px}\n.ccr-case h2{font-size:27px;line-height:1.3;margin:0 0 18px}.ccr-case p{margin:0 0 18px}.ccr-case p:last-child{margin-bottom:0}\n.ccr-case a{color:#755c23;text-underline-offset:3px}.ccr-case .ccr-breadcrumb{font-size:14px;color:#59676e;margin-bottom:28px}\n.ccr-case .ccr-label{font-size:13px;line-height:1.5;letter-spacing:.12em;text-transform:uppercase;font-weight:700;color:#755c23;margin-bottom:10px}\n.ccr-case .ccr-lead{font-size:21px;line-height:1.65;max-width:940px;margin-bottom:24px}\n.ccr-case .ccr-button{display:inline-block;background:#293f4e;color:#fff;padding:13px 24px;text-decoration:none;border-radius:3px;font-size:16px;line-height:1.5;font-weight:700}\n.ccr-case .ccr-button:hover{background:#385667}.ccr-case a:focus-visible{outline:3px solid #196aa3;outline-offset:4px}\n.ccr-case .ccr-highlight{margin:32px 0 24px;background:#f4f5f7;border-left:4px solid #c5a356;padding:24px 28px}\n.ccr-case .ccr-highlight strong{font-size:25px;line-height:1.35;color:#253d4c;display:block}.ccr-case .ccr-jump{display:flex;flex-wrap:wrap;gap:12px 24px;font-size:15px;border-bottom:1px solid #d8dde0;padding:0 0 24px}\n.ccr-case .ccr-section{display:grid;grid-template-columns:235px minmax(0,1fr);gap:42px;padding:34px 0;border-bottom:1px solid #e0e4e7;scroll-margin-top:130px}\n.ccr-case .ccr-section h2{font-size:24px}.ccr-case .ccr-result{border-top:3px solid #c5a356;border-bottom:1px solid #d8dde0;background:#fafaf8;padding:28px;margin:10px -28px}\n.ccr-case .ccr-request{padding:32px;background:#f4f5f7;margin:34px 0 24px;scroll-margin-top:130px}.ccr-case .ccr-request>p{max-width:860px;margin-bottom:22px}\n.ccr-case .ccr-small{font-size:14px;line-height:1.65;color:#59676e}.ccr-case .ccr-links{display:flex;flex-wrap:wrap;gap:12px 24px;font-size:16px}\n.ccr-case .ccr-hero{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:48px;align-items:start}\n.ccr-case .ccr-report-preview{padding:14px 6px 0;text-align:center}.ccr-case .ccr-preview-card{width:178px;max-width:100%;margin:0 auto;display:block;position:relative;background:#fff;padding:8px;border:1px solid #d8dde0;box-shadow:0 10px 28px rgba(37,61,76,.13);text-decoration:none}\n.ccr-case .ccr-preview-card img{display:block;width:100%;height:auto}.ccr-case .ccr-preview-card:hover{outline:2px solid #c5a356;outline-offset:3px}\n.ccr-case .ccr-preview-caption{font-size:14px;line-height:1.6;margin:16px 0 0;color:#59676e}.ccr-case .ccr-preview-caption strong{display:block;color:#253d4c;font-weight:700}\n@media(max-width:850px){.ccr-case .ccr-hero{grid-template-columns:1fr;gap:24px}.ccr-case .ccr-report-preview{width:248px;max-width:100%;margin:0 auto}}\n@media(max-width:800px){.ccr-case .ccr-section{grid-template-columns:1fr;gap:4px;padding:26px 0}.ccr-case .ccr-section h2{font-size:25px}.ccr-case .ccr-result{padding:24px;margin:8px -12px}.ccr-case{padding:0 18px}.ccr-case .ccr-lead{font-size:20px}.ccr-case .ccr-request{padding:24px}.ccr-case .ccr-highlight{padding:21px}.ccr-case .ccr-section,.ccr-case .ccr-request{scroll-margin-top:90px}}\n<\/style><article class=\"ccr-case\" data-summary-version=\"expanded-20260912\" data-preview-version=\"compact-v2\"><nav class=\"ccr-breadcrumb\" aria-label=\"Fil d&#039;Ariane\"><a href=\"\/fr\/etudes-de-cas\/\">\u00c9tudes de cas<\/a> \/ Solutions de proc\u00e9d\u00e9s de raffinage<\/nav><div class=\"ccr-hero\"><div><p class=\"ccr-label\">Vue d'ensemble de l'\u00e9tude de cas<\/p><h1>Northshore CK356N6C : Contr\u00f4le de la corrosion \u00e0 haute temp\u00e9rature<\/h1><p class=\"ccr-lead\">Une raffinerie traitant du p\u00e9trole brut offshore \u00e0 forte acidit\u00e9 devait g\u00e9rer les indicateurs de corrosion dans la section sous vide tout en respectant une contrainte relative \u00e0 la teneur en phosphore en aval. Cestoil a \u00e9valu\u00e9 le produit Northshore CK356N6C en proc\u00e9dant d'abord \u00e0 une phase de formation de film, suivie d'un traitement d'entretien. La teneur moyenne en fer dans le soutirage lat\u00e9ral n\u00b0 3 de la colonne sous vide a \u00e9t\u00e9 inf\u00e9rieure de 72 % durant la phase d'entretien par rapport \u00e0 la p\u00e9riode initiale de traitement. Cette \u00e9tude de cas associe la s\u00e9lection de l'inhibiteur, la planification de l'injection et le suivi conjoint de l'acidit\u00e9 et de la teneur en fer \u00e0 un programme pratique de surveillance en raffinerie.<\/p><a class=\"ccr-button\" href=\"https:\/\/www.cestoil.com\/fr\/demander-une-etude-de-cas\/?case=2521\">Demander l'\u00e9tude de cas compl\u00e8te<\/a><\/div><aside class=\"ccr-report-preview\" aria-label=\"Aper\u00e7u du rapport\"><a class=\"ccr-preview-card\" href=\"https:\/\/www.cestoil.com\/fr\/demander-une-etude-de-cas\/?case=2521\" aria-label=\"Demandez l&#039;\u00e9tude de cas compl\u00e8te Northshore CK356N6C\"><img loading=\"lazy\" src=\"https:\/\/www.cestoil.com\/wp-content\/uploads\/case-2521-compact-preview-v2.webp\" width=\"160\" height=\"208\" decoding=\"async\" alt=\"Aper\u00e7u r\u00e9duit d&#039;une page du rapport d&#039;\u00e9tude de cas Northshore CK356N6C\"><\/a><p class=\"ccr-preview-caption\"><strong>PDF illustr\u00e9 de 2 pages<\/strong>Rapport complet disponible sur approbation.<\/p><\/aside><\/div><aside class=\"ccr-highlight\" aria-label=\"Observation cl\u00e9\"><p class=\"ccr-label\">Northshore CK356N6C<\/p><strong>Teneur en fer dans le flux lat\u00e9ral 3 inf\u00e9rieure de 72 % entre les p\u00e9riodes de traitement<\/strong><\/aside><nav class=\"ccr-jump\" aria-label=\"Sur cette page\"><a href=\"#case-section-1\">D\u00e9fi op\u00e9rationnel<\/a><a href=\"#case-section-3\">Mise en \u0153uvre sur le terrain<\/a><a href=\"#case-section-4\">R\u00e9sultats communiqu\u00e9s<\/a><a href=\"#case-report\">\u00c9tude de cas compl\u00e8te<\/a><\/nav><section class=\"ccr-section\" id=\"case-section-1\"><h2>Gestion de la corrosion sous contrainte de phosphore<\/h2><div><p>Apr\u00e8s l'arr\u00eat de maintenance, la raffinerie a repris le traitement de p\u00e9troles bruts lourds d'origine offshore et a constat\u00e9 la pr\u00e9sence persistante de fer dans les coupes lat\u00e9rales de l'unit\u00e9 de distillation sous vide. La forte acidit\u00e9 de ces coupes accentuait les craintes concernant la corrosion par les acides napht\u00e9niques \u00e0 haute temp\u00e9rature. La raffinerie devait \u00e9valuer une solution de traitement compatible avec les conditions d'exploitation de l'unit\u00e9 existante et la m\u00e9tallurgie de ses \u00e9quipements.<\/p><p>Les unit\u00e9s situ\u00e9es en aval imposaient \u00e9galement des restrictions concernant le phosphore, limitant ainsi les options d'inhibiteurs envisageables pour la raffinerie. La s\u00e9lection du produit devait donc r\u00e9pondre \u00e0 deux imp\u00e9ratifs : rem\u00e9dier au probl\u00e8me de corrosion dans la section sous vide et respecter les contraintes des proc\u00e9d\u00e9s en aval. C'est ce contexte qui explique le choix de la nuance CK356N6C, \u00e0 faible teneur en phosphore, pour l'application d\u00e9crite dans ce cas.<\/p><\/div><\/section><section class=\"ccr-section\" id=\"case-section-2\"><h2>\u00c9valuation technique avant injection<\/h2><div><p>Cestoil a pr\u00e9lev\u00e9 des \u00e9chantillons des flux de l'unit\u00e9 et a examin\u00e9, avec le service technique de la raffinerie, l'historique de la corrosion, les temp\u00e9ratures des flux lat\u00e9raux ainsi que la m\u00e9tallurgie. La strat\u00e9gie de traitement reposait sur l'action filmog\u00e8ne de l'inhibiteur pour l'application cibl\u00e9e. La planification de l'injection a pris en compte les circuits de recirculation interm\u00e9diaires (pumparounds) de la colonne sous vide et le reflux d'huile de lavage comme voies d'introduction du produit.<\/p><p>La source d\u00e9crit trois points d'injection ainsi que les flux qui y sont associ\u00e9s. Leurs emplacements et les conditions d'\u00e9coulement figurent dans le rapport d\u00e9taill\u00e9, car ils constituent la base de l'application. Une autre raffinerie devrait examiner sa propre configuration de colonne, les temp\u00e9ratures des flux et la m\u00e9tallurgie avant de d\u00e9cider du mode d'application du produit ou d'\u00e9valuer la pertinence de cet essai.<\/p><\/div><\/section><section class=\"ccr-section\" id=\"case-section-3\"><h2>Formation initiale du film et traitement d'entretien<\/h2><div><p>La raffinerie a d\u00e9but\u00e9 l'injection en avril 2019 par une phase initiale de formation de film. Elle est ensuite pass\u00e9e \u00e0 un taux de traitement d'entretien plus faible tout en continuant \u00e0 traiter la gamme de p\u00e9troles bruts offshore. Cestoil et la raffinerie ont suivi les donn\u00e9es d'exploitation jusqu'au d\u00e9but du mois de juillet, en effectuant des analyses r\u00e9guli\u00e8res de l'acidit\u00e9 et de la teneur en fer sur trois flux lat\u00e9raux de l'unit\u00e9 sous vide.<\/p><p>Dans ce cas, les deux p\u00e9riodes de traitement r\u00e9pondent \u00e0 des objectifs diff\u00e9rents. La p\u00e9riode initiale rend compte de l'application initiale, tandis que la p\u00e9riode de maintenance illustre l'op\u00e9ration de suivi ult\u00e9rieure r\u00e9alis\u00e9e au taux de traitement r\u00e9vis\u00e9. La chronologie est importante pour l'interpr\u00e9tation des r\u00e9sultats : la comparaison en pourcentage pr\u00e9sent\u00e9e dans le rapport porte sur ces deux p\u00e9riodes de traitement, et non sur une comparaison entre une unit\u00e9 non trait\u00e9e et une unit\u00e9 trait\u00e9e.<\/p><\/div><\/section><section class=\"ccr-section ccr-result\" id=\"case-section-4\"><h2>R\u00e9sultat rapport\u00e9 : teneur en fer plus faible dans le flux secondaire en phase de maintenance<\/h2><div><p>La teneur moyenne en fer dans le flux secondaire 3 est pass\u00e9e de 2,98 mg\/kg durant la p\u00e9riode de formation du film \u00e0 0,84 mg\/kg durant la phase de maintenance, soit une r\u00e9duction de 72 % . Les indicateurs correspondants pour les autres flux secondaires surveill\u00e9s ont \u00e9galement diminu\u00e9. L'\u00e9tude de cas compl\u00e8te pr\u00e9sente les moyennes par p\u00e9riode ainsi que des graphiques d'\u00e9volution, permettant aux examinateurs d'analyser la chronologie et la coh\u00e9rence des observations.<\/p><p>L'acidit\u00e9 est demeur\u00e9e \u00e9lev\u00e9e tout au long du programme de suivi, apportant un contexte utile \u00e0 l'interpr\u00e9tation des valeurs de fer plus faibles. Les relev\u00e9s ont \u00e9galement fait appara\u00eetre de br\u00e8ves pointes de teneur en fer, suivies de mesures plus basses. Le rapport de la raffinerie a conclu que le traitement avait atteint son objectif d'\u00e9valuation. Ces observations \u00e9tayent l'analyse des performances du CK356N6C dans le cadre du programme de suivi du site, en int\u00e9grant l'historique d'exploitation \u00e0 la comparaison principale.<\/p><\/div><\/section><section class=\"ccr-section\" id=\"case-section-5\"><h2>Ce que le r\u00e9sultat concernant le fer indique \u00e0 l'examinateur<\/h2><div><p>La teneur en fer dans le flux constitue un indicateur indirect de la corrosion. Bien qu'elle puisse \u00eatre utile pour le suivi d'un programme de traitement, la variation de 72 % ne doit pas \u00eatre assimil\u00e9e \u00e0 une r\u00e9duction directement mesur\u00e9e du taux de corrosion des \u00e9quipements. Les r\u00e9sultats d'inspections, les donn\u00e9es issues de sondes ou d'autres relev\u00e9s de corrosion de la raffinerie apporteraient des \u00e9l\u00e9ments compl\u00e9mentaires sur l'\u00e9tat des \u00e9quipements.<\/p><p>Le suivi conjoint de l'acidit\u00e9 et de la teneur en fer dans ce cas pr\u00e9cis s'av\u00e8re donc particuli\u00e8rement utile. L'analyse simultan\u00e9e de ces deux param\u00e8tres pour un m\u00eame flux et sur une m\u00eame p\u00e9riode permet \u00e0 l'\u00e9quipe de d\u00e9terminer si les conditions d'alimentation ont \u00e9volu\u00e9 alors que l'indicateur relatif au fer s'am\u00e9liorait. L'historique des traitements, la nature des charges de brut et les \u00e9v\u00e9nements op\u00e9rationnels apportent un \u00e9clairage suppl\u00e9mentaire. Une \u00e9valuation similaire peut s'appuyer sur cette approche tout en s\u00e9lectionnant les mesures les plus adapt\u00e9es aux probl\u00e9matiques sp\u00e9cifiques de l'\u00e9quipement concern\u00e9.<\/p><\/div><\/section><section class=\"ccr-section\" id=\"case-section-6\"><h2>Le\u00e7ons pratiques pour le remplacement des ardoises brutes<\/h2><div><p>La raffinerie a recommand\u00e9 de lier les d\u00e9cisions de traitement \u00e0 l'acidit\u00e9 du brut et de revoir le mode de dispersion de l'inhibiteur dans le proc\u00e9d\u00e9. Ses recommandations ult\u00e9rieures pr\u00e9voyaient l'injection d'un fluide vecteur, alors que l'essai document\u00e9 lui-m\u00eame utilisait le syst\u00e8me d'injection existant pour doser le produit pur. Dissocier le dispositif de l'essai de la recommandation ult\u00e9rieure permet \u00e0 un autre op\u00e9rateur de comprendre ce qui a \u00e9t\u00e9 test\u00e9 et les am\u00e9liorations propos\u00e9es par la raffinerie.<\/p><p>Pour une nouvelle application, l'\u00e9quipe d'exploitation et Cestoil peuvent examiner conjointement l'acidit\u00e9 du p\u00e9trole brut et des flux secondaires, les conditions du flux d'injection ainsi que les exigences en mati\u00e8re de phosphore en aval. Toute modification de la gamme de p\u00e9troles bruts doit conduire \u00e0 une r\u00e9\u00e9valuation de cette base de traitement. Ce cas constitue un exemple document\u00e9 permettant d'\u00e9tayer la r\u00e9flexion ; les proc\u00e9dures du site et l'\u00e9tat des \u00e9quipements d\u00e9terminent le programme retenu pour une autre unit\u00e9.<\/p><\/div><\/section><section class=\"ccr-request\" id=\"case-report\"><h2>Examiner les p\u00e9riodes de traitement et les \u00e9l\u00e9ments de preuve techniques<\/h2><p>Demandez le PDF complet pour examiner le dispositif d'injection, les param\u00e8tres de formation de film et de maintenance, les tendances en mati\u00e8re d'acidit\u00e9 et de teneur en fer, ainsi que les conclusions op\u00e9rationnelles de la raffinerie. Le rapport distingue \u00e9galement la comparaison des p\u00e9riodes de traitement de l'objectif plus large de gestion de la corrosion. Veuillez inclure dans votre demande des informations sur les flux concern\u00e9s, les temp\u00e9ratures, la m\u00e9tallurgie et les contraintes en aval. Cestoil examine le profil de l'entreprise et l'application envisag\u00e9e avant de communiquer l'\u00e9tude de cas d\u00e9taill\u00e9e en vue d'une discussion technique.<\/p><a class=\"ccr-button\" href=\"https:\/\/www.cestoil.com\/fr\/demander-une-etude-de-cas\/?case=2521\">Demander l'\u00e9tude de cas compl\u00e8te<\/a><p class=\"ccr-small\" style=\"margin-top:16px\">Les demandes sont examin\u00e9es avant la publication des rapports.<\/p><\/section><p class=\"ccr-small\">Source : Rapport d'utilisation client, service technique de la raffinerie, programme de traitement de la section sous vide, avril-juillet 2019.<\/p><nav class=\"ccr-links\" aria-label=\"Pages connexes\"><a href=\"\/fr\/applications-des-produits\/solutions-de-procedes-de-raffinage\/\">D\u00e9couvrez les solutions de proc\u00e9d\u00e9s de raffinage<\/a><a href=\"\/fr\/etudes-de-cas\/\">Toutes les \u00e9tudes de cas<\/a><\/nav><\/article>\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Northshore CK356N6C a \u00e9t\u00e9 \u00e9valu\u00e9 pour la lutte contre la corrosion avec une faible teneur en phosphore, alors qu'une raffinerie traitait du p\u00e9trole brut \u00e0 forte acidit\u00e9.<\/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 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"Northshore CK356N6C was evaluated for low-phosphorus corrosion control while a refinery processed high-acid crude. 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