{"id":6520,"date":"2020-11-27T07:21:07","date_gmt":"2020-11-27T07:21:07","guid":{"rendered":"https:\/\/www.kaysuns.com\/?p=6520"},"modified":"2022-06-30T08:58:26","modified_gmt":"2022-06-30T08:58:26","slug":"corrosion-atmospherique-des-tuyaux-en-acier-inoxydable-duplex","status":"publish","type":"blog","link":"https:\/\/www.kaysuns.com\/fr\/blog\/corrosion-atmospherique-des-tuyaux-en-acier-inoxydable-duplex\/","title":{"rendered":"Corrosion atmosph\u00e9rique des tuyaux en acier inoxydable duplex"},"content":{"rendered":"<p>Contrairement \u00e0 la corrosion des tuyaux en acier duplex immerg\u00e9s dans une solution liquide, la corrosion atmosph\u00e9rique fait r\u00e9f\u00e9rence \u00e0 la corrosion de <a href=\"https:\/\/www.kaysuns.com\/fr\/duplex-2205-stainless-steel-pipe\/\" target=\"_blank\">tuyaux en acier inoxydable duplex<\/a> expos\u00e9 \u00e0 l&#039;air.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"558\" height=\"434\" src=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/11\/Atmospheric-Corrosion.jpg\" alt=\"Corrosion atmosph\u00e9rique\" class=\"wp-image-6521\" srcset=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/11\/Atmospheric-Corrosion.jpg 558w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2020\/11\/Atmospheric-Corrosion-300x233.jpg 300w\" sizes=\"(max-width: 558px) 100vw, 558px\" \/><\/figure><\/div>\n\n\n\n<p>La corrosion atmosph\u00e9rique r\u00e9sume un large \u00e9ventail de conditions, de sorte que la classification de la corrosion atmosph\u00e9rique est diverse. Certains sont class\u00e9s en fonction de la g\u00e9ographie et de l&#039;air contenant des oligo-\u00e9l\u00e9ments (industriels, marins et ruraux) ; certains sont class\u00e9s par climat (tropical, tropical humide, temp\u00e9r\u00e9, etc.) ; et certains sont class\u00e9s selon l&#039;\u00e9tat de fixation de la vapeur d&#039;eau sur la surface m\u00e9tallique.<\/p>\n\n\n\n<p>Du point de vue des conditions de corrosion, les principaux composants de l'atmosph\u00e8re sont l'eau et l'oxyg\u00e8ne, et la vapeur d'eau dans l'atmosph\u00e8re est le principal facteur qui d\u00e9termine le taux de corrosion et l'historique du tuyau en acier inoxydable duplex atmosph\u00e9rique. Par cons\u00e9quent, la corrosion atmosph\u00e9rique peut \u00eatre divis\u00e9e en trois types : \"sec\", \"humide\" et \"mouill\u00e9\" selon le degr\u00e9 d'humidit\u00e9 de la surface m\u00e9tallique corrod\u00e9e.<\/p>\n\n\n\n<p>La corrosion atmosph\u00e9rique s\u00e8che est \u00e9galement appel\u00e9e oxydation s\u00e8che et corrosion \u00e0 faible humidit\u00e9, c&#039;est-\u00e0-dire corrosion atmosph\u00e9rique lorsqu&#039;il n&#039;y a pratiquement pas de film d&#039;eau \u00e0 la surface du tuyau en acier duplex. Ce type de corrosion appartient \u00e0 l&#039;oxydation \u00e0 temp\u00e9rature ambiante dans la corrosion chimique. Dans une atmosph\u00e8re propre et s\u00e8che \u00e0 temp\u00e9rature ambiante, la plupart des m\u00e9taux forment un film d&#039;oxyde invisible extr\u00eamement mince d&#039;une \u00e9paisseur de 10 \u00e0 40 A.<\/p>\n\n\n\n<p>Lorsque l&#039;humidit\u00e9 relative est inf\u00e9rieure \u00e0 100%, la corrosion du m\u00e9tal se produit sous un mince film d&#039;eau invisible \u00e0 l&#039;\u0153il nu. Tels que la rouille du fer lorsqu&#039;il n&#039;est pas expos\u00e9 \u00e0 la pluie ou \u00e0 la neige. Cette couche de film d&#039;eau se forme \u00e0 la surface du m\u00e9tal sous l&#039;action d&#039;un tuyau en acier biphas\u00e9, d&#039;une adsorption ou d&#039;une agr\u00e9gation chimique. Par cons\u00e9quent, la concentration de cette vapeur d&#039;eau corrosive doit d\u00e9passer une certaine valeur minimale (humidit\u00e9 critique). De plus, il n\u00e9cessite \u00e9galement la pr\u00e9sence d&#039;une petite quantit\u00e9 de contamination gazeuse ou de contamination solide. Lorsque l&#039;humidit\u00e9 critique est d\u00e9pass\u00e9e, la pr\u00e9sence de contamination augmente consid\u00e9rablement le taux de corrosion de la surface du tuyau en acier duplex.<\/p>\n\n\n\n<hr class=\"wp-block-separator\"\/>\n\n\n\n<p>Post\u00e9 par <a href=\"https:\/\/www.kaysuns.com\/fr\/\" target=\"_blank\">tuyaux et raccords en acier inoxydable<\/a> fournisseur, KAYSUNS.<\/p>","protected":false},"featured_media":6521,"template":"","categories":[2],"tags":[],"class_list":["post-6520","blog","type-blog","status-publish","has-post-thumbnail","hentry","category-stainless-steel-pipe"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Atmospheric Corrosion Of Duplex Stainless Steel Pipe - KAYSUNS<\/title>\n<meta name=\"description\" content=\"Duplex stainless steel pipes exposed to the air will sause atmospheric corrosion which is more is different from liquid solution corrosion.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.kaysuns.com\/fr\/blog\/corrosion-atmospherique-des-tuyaux-en-acier-inoxydable-duplex\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Atmospheric Corrosion Of Duplex Stainless Steel Pipe - 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