{"id":6485,"date":"2020-11-10T07:21:04","date_gmt":"2020-11-10T07:21:04","guid":{"rendered":"https:\/\/www.kaysuns.com\/?p=6485"},"modified":"2025-12-15T07:15:52","modified_gmt":"2025-12-15T07:15:52","slug":"corrosion-galvanique-sur-un-tuyau-en-acier-inoxydable-duplex-2205","status":"publish","type":"blog","link":"https:\/\/www.kaysuns.com\/fr\/blog\/corrosion-galvanique-sur-un-tuyau-en-acier-inoxydable-duplex-2205\/","title":{"rendered":"Corrosion galvanique sur les tuyaux en acier inoxydable Duplex 2205"},"content":{"rendered":"<p>Pour la corrosion galvanique du duplex 2205 <a href=\"https:\/\/www.kaysuns.com\/fr\/tuyaux-en-acier-inoxydable\/\" target=\"_blank\">tuyau en acier inoxydable<\/a>, les facteurs d&#039;influence sont plus complexes.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"768\" src=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2015\/11\/20190816140342-1024x768.jpg\" alt=\"tuyaux en acier inoxydable duplex\" class=\"wp-image-5188\" srcset=\"https:\/\/www.kaysuns.com\/wp-content\/uploads\/2015\/11\/20190816140342-1024x768.jpg 1024w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2015\/11\/20190816140342-300x225.jpg 300w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2015\/11\/20190816140342-768x576.jpg 768w, https:\/\/www.kaysuns.com\/wp-content\/uploads\/2015\/11\/20190816140342.jpg 1080w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\">tuyaux en acier inoxydable duplex<\/figcaption><\/figure>\n<\/div>\n\n\n<p>En plus de la nature du mat\u00e9riau en contact avec le tuyau en acier duplex, il est \u00e9galement affect\u00e9 par plusieurs autres facteurs.<\/p>\n\n\n\n<p>Le premier est l&#039;effet de surface du tuyau duplex : le taux de corrosion galvanique est li\u00e9 au rapport de surface des phases anodique et cathodique. G\u00e9n\u00e9ralement, l&#039;augmentation de la surface de l&#039;anode peut r\u00e9duire le taux de corrosion. Connaissant le principe de la corrosion \u00e9lectrochimique, les petites anodes et les grandes cathodes sont les plus susceptibles de former une corrosion galvanique. Par exemple, la corrosion des \u00e9prouvettes avec des rivets en fer sur des tuyaux en acier inoxydable 2205 immerg\u00e9s dans l&#039;eau de mer est le cas, et les rivets en fer seront fortement corrod\u00e9s. Au contraire, la connexion entre la grande anode et la petite cathode n&#039;est pas sujette \u00e0 la corrosion galvanique. S&#039;il y a des rivets en cuivre sur une grande plaque de fer, l&#039;effet galvanique est consid\u00e9rablement r\u00e9duit.<\/p>\n\n\n\n<p>Si la corrosion galvanique des tuyaux duplex 2205 est contr\u00f4l\u00e9e par diffusion cathodique, l&#039;effet du rapport de surface de l&#039;anode et de la cathode sur la vitesse de corrosion est plus compliqu\u00e9. Par exemple, lorsque le d\u00e9polariseur cathodique (oxydant) est de l&#039;oxyg\u00e8ne, le processus cathodique est souvent contr\u00f4l\u00e9 par la diffusion d&#039;oxyg\u00e8ne. Le m\u00e9tal cathodique fonctionne uniquement comme une \u00e9lectrode \u00e0 oxyg\u00e8ne.<\/p>\n\n\n\n<p>Le second est le facteur d&#039;environnement d&#039;installation du tuyau en acier inoxydable duplex 2205. Pour la corrosion galvanique, l&#039;environnement avec des facteurs environnementaux tr\u00e8s diff\u00e9rents a une corrosivit\u00e9 diff\u00e9rente, et le degr\u00e9 de corrosion de l&#039;acier duplex est \u00e9galement diff\u00e9rent.<\/p>\n\n\n\n<p>En g\u00e9n\u00e9ral, les m\u00e9taux avec une teneur plus faible en <a href=\"https:\/\/www.kaysuns.com\/fr\/la-resistance-a-la-corrosion-de-lacier-inoxydable\/\" target=\"_blank\">r\u00e9sistance \u00e0 la corrosion<\/a> Dans certains environnements, ils constituent les anodes des couples galvaniques. Parfois, le potentiel d'un m\u00eame couple galvanique s'inverse dans diff\u00e9rents environnements, modifiant ainsi la polarit\u00e9 du mat\u00e9riau. Par exemple, apr\u00e8s le couplage de l'acier et du zinc, le zinc est corrod\u00e9 dans certaines solutions aqueuses, tandis que l'acier est prot\u00e9g\u00e9. Si la temp\u00e9rature de l'eau est plus \u00e9lev\u00e9e (sup\u00e9rieure \u00e0 80 \u00b0C), la polarit\u00e9 du couple galvanique s'inverse et le tuyau en acier est corrod\u00e9 en tant qu'anode. Un autre exemple est le couplage du magn\u00e9sium et de l'aluminium dans une solution de chlorure de sodium neutre ou l\u00e9g\u00e8rement acide, o\u00f9 le magn\u00e9sium est anodique. Cependant, \u00e0 mesure que le magn\u00e9sium continue de se dissoudre, la solution devient alcaline, de sorte que l'aluminium devient l'anode.<\/p>\n\n\n\n<p>Les effets de la corrosion galvanique se produisent facilement au niveau des joints de <a href=\"https:\/\/www.kaysuns.com\/fr\/duplex-2205-stainless-steel-pipe\/\" target=\"_blank\">tuyaux en acier inoxydable duplex<\/a>. En effet, la distribution du courant de corrosion du m\u00e9tal de l&#039;anode dans la corrosion galvanique n&#039;est pas uniforme et la corrosion acc\u00e9l\u00e9r\u00e9e caus\u00e9e par l&#039;effet galvanique est la plus importante au niveau du joint. Plus le joint est \u00e9loign\u00e9, plus la corrosion est faible. De plus, la conductivit\u00e9 du milieu affectera \u00e9galement le taux de corrosion galvanique.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<p>Publi\u00e9 par KAYSUNS, le <a href=\"https:\/\/www.kaysuns.com\/fr\/\" target=\"_blank\">fournisseur de raccords de tuyauterie duplex<\/a><\/p>","protected":false},"featured_media":5255,"template":"","categories":[186],"tags":[],"class_list":["post-6485","blog","type-blog","status-publish","has-post-thumbnail","hentry","category-stainless-steel-knowledge"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Galvanic Corrosion On Duplex 2205 Stainless Steel Pipe - KAYSUNS<\/title>\n<meta name=\"description\" content=\"Galvanic corrosion of duplex 2205 stainless steel pipe is a complicated topic, there are too many influencing factors, like materials...\" \/>\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-galvanique-sur-un-tuyau-en-acier-inoxydable-duplex-2205\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Galvanic Corrosion On Duplex 2205 Stainless Steel Pipe - 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