{"id":8605,"date":"2026-02-09T17:48:44","date_gmt":"2026-02-09T15:48:44","guid":{"rendered":"https:\/\/mfinox.com\/corrosion-du-nid-dabeille-comment-linterpreter-selon-astm-g48-et-astm-a262\/"},"modified":"2026-02-09T17:48:44","modified_gmt":"2026-02-09T15:48:44","slug":"corrosion-du-nid-dabeille-comment-linterpreter-selon-astm-g48-et-astm-a262","status":"publish","type":"post","link":"https:\/\/mfinox.com\/fr\/corrosion-du-nid-dabeille-comment-linterpreter-selon-astm-g48-et-astm-a262\/","title":{"rendered":"Corrosion du nid d&rsquo;abeille : comment l&rsquo;interpr\u00e9ter selon ASTM G48 et ASTM A262"},"content":{"rendered":"<article>\n<header><em>La corrosion localis\u00e9e est l&rsquo;un des m\u00e9canismes les plus insidieux pour les aciers inoxydables et les alliages sp\u00e9ciaux : la reconna\u00eetre et la pr\u00e9venir est essentiel pour la fiabilit\u00e9 des installations.<\/em><\/header>\n<section>\n<h2>Qu&rsquo;est-ce que la corrosion alv\u00e9olaire ?<\/h2>\n<p>La <strong>corrosion alv\u00e9olaire<\/strong>, souvent assimil\u00e9e \u00e0 la <strong>piq\u00fbre<\/strong>, est une forme de corrosion localis\u00e9e qui se manifeste par de petites attaques ponctuelles ou des cavit\u00e9s \u00e0 la surface du mat\u00e9riau. Contrairement \u00e0 la corrosion uniforme, ce type de d\u00e9gradation peut progresser en profondeur sans signes apparents, entra\u00eenant des <strong>perforations soudaines<\/strong> et une d\u00e9faillance structurelle. <\/p>\n<p>Il s&rsquo;agit d&rsquo;un ph\u00e9nom\u00e8ne typique pour les <strong>aciers inoxydables<\/strong> et les alliages r\u00e9sistants \u00e0 la corrosion lorsqu&rsquo;ils sont utilis\u00e9s dans des environnements contenant des <strong>chlorures<\/strong>, des solutions salines ou des conditions chimiques agressives.<\/p>\n<\/section>\n<hr>\n<section>\n<h2>Pourquoi la corrosion des nids d&rsquo;abeilles est-elle critique dans les syst\u00e8mes de fixation ?<\/h2>\n<p>Dans les <strong>syst\u00e8mes de fixation<\/strong>, la corrosion du nid d&rsquo;abeille pr\u00e9sente un risque \u00e9lev\u00e9 pour les raisons suivantes : <\/p>\n<ul>\n<li>r\u00e9duit consid\u00e9rablement la <strong>section r\u00e9sistante du<\/strong> boulon ou de la vis ;<\/li>\n<li>peut \u00eatre d\u00e9clench\u00e9 dans des zones difficiles \u00e0 inspecter, telles que les <strong>filetages<\/strong> et les surfaces de contact ;<\/li>\n<li>entra\u00eene des d\u00e9faillances soudaines sans avertissement ;<\/li>\n<li>rend inefficace tout dimensionnement m\u00e9canique, m\u00eame correct.<\/li>\n<\/ul>\n<p>C&rsquo;est pourquoi la r\u00e9sistance \u00e0 la corrosion des nids d&rsquo;abeilles est un param\u00e8tre cl\u00e9 lors de la s\u00e9lection des mat\u00e9riaux pour les applications <strong>offshore<\/strong>, <strong>marines<\/strong>, <strong>chimiques<\/strong> et <strong>\u00e9nerg\u00e9tiques<\/strong>.<\/p>\n<\/section>\n<hr>\n<section>\n<h2>La norme ASTM G48 : test de r\u00e9sistance \u00e0 la corrosion par piq\u00fbres et crevasses<\/h2>\n<p>L <strong>&lsquo;ASTM G48<\/strong> est l&rsquo;une des normes de r\u00e9f\u00e9rence les plus utilis\u00e9es pour \u00e9valuer la <strong>r\u00e9sistance \u00e0 la corrosion alv\u00e9olaire et fissurale<\/strong> des aciers inoxydables, duplex et super duplex.<\/p>\n<p>Le test consiste \u00e0 exposer le mat\u00e9riau \u00e0 une <strong>solution de chlorure ferrique<\/strong> \u00e0 une temp\u00e9rature contr\u00f4l\u00e9e pendant une p\u00e9riode d\u00e9finie. \u00c0 la fin du test, il est \u00e9valu\u00e9 : <\/p>\n<ul>\n<li>la pr\u00e9sence d&rsquo;<strong>attaques localis\u00e9es<\/strong>;<\/li>\n<li>la <strong>perte de masse<\/strong>;<\/li>\n<li>la profondeur et la r\u00e9partition des alv\u00e9oles.<\/li>\n<\/ul>\n<p>La norme ASTM G48 est particuli\u00e8rement adapt\u00e9e \u00e0 la comparaison de mat\u00e9riaux tels que <a href=\"https:\/\/mfinox.com\/fr\/materiaux\/acier-inoxydable-werkstoff-1-4401-aisi-316-uns-s31600\/\"><strong>AISI 316L<\/strong><\/a>, <a href=\"https:\/\/mfinox.com\/fr\/materiaux\/acier-inoxydable-aisi-904l-uns-n08904-w-1-4539-3\/\"><strong>904L<\/strong><\/a> e <a href=\"https:\/\/mfinox.com\/fr\/materiaux\/super-duplex-a182-f53-uns-<a href=\"https:\/\/mfinox.com\/fr\/materiaux\/super-duplex-a182-f53-uns-s32750-w-1-4410-saf-2507\/\" style=\"text-decoration: underline;\">s32750<\/a>-w-1-4410-saf-2507\/\"><strong>super duplex UNS <a href=\"https:\/\/mfinox.com\/fr\/materiaux\/super-duplex-a182-f53-uns-s32750-w-1-4410-saf-2507\/\" style=\"text-decoration: underline;\">S32750<\/a><\/strong><\/a> en termes de comportement r\u00e9el dans des environnements chlor\u00e9s.<\/p>\n<\/section>\n<hr>\n<section>\n<h2>La norme ASTM A262 : corrosion intergranulaire et sensibilisation<\/h2>\n<p>L&rsquo;<strong>ASTM A262<\/strong> est une norme ax\u00e9e sur l&rsquo;\u00e9valuation de la <strong>corrosion intergranulaire<\/strong>, un ph\u00e9nom\u00e8ne diff\u00e9rent mais \u00e9troitement li\u00e9 \u00e0 la corrosion en nid d&rsquo;abeille en termes de fiabilit\u00e9 des mat\u00e9riaux.<\/p>\n<p>Cette norme permet de v\u00e9rifier si un acier inoxydable est <strong>sensibilis\u00e9<\/strong>, c&rsquo;est-\u00e0-dire susceptible de pr\u00e9senter une corrosion pr\u00e9f\u00e9rentielle le long des joints de grains, souvent \u00e0 la suite d&rsquo;un traitement thermique ou d&rsquo;un soudage incorrect.<\/p>\n<p>Un mat\u00e9riau qui passe les tests ASTM A262 offre \u00e9galement de meilleures garanties contre l&rsquo;initiation de la corrosion localis\u00e9e dans des conditions r\u00e9elles d&rsquo;utilisation.<\/p>\n<\/section>\n<hr>\n<section>\n<h2>Comparaison des normes ASTM G48 et ASTM A262<\/h2>\n<table style=\"width: 100%; border-collapse: collapse; text-align: left;\" border=\"1\" cellspacing=\"0\" cellpadding=\"10\">\n<thead>\n<tr style=\"background-color: #f2f2f2;\">\n<th>Norme<\/th>\n<th>Type de corrosion \u00e9valu\u00e9<\/th>\n<th>Objectif de l&rsquo;essai<\/th>\n<th>Application typique<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><strong>ASTM G48<\/strong><\/td>\n<td>Nid d&rsquo;abeille \/ piq\u00fbre \/ fissuration<\/td>\n<td>R\u00e9sistance aux environnements chlor\u00e9s<\/td>\n<td>Offshore, marine, chimique<\/td>\n<\/tr>\n<tr>\n<td><strong>ASTM A262<\/strong><\/td>\n<td>Intergranulaire<\/td>\n<td>Essai de sensibilisation<\/td>\n<td>Composants soud\u00e9s, acier inoxydable aust\u00e9nitique<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/section>\n<hr>\n<section>\n<h2>Mat\u00e9riaux les plus appropri\u00e9s pour lutter contre la corrosion des nids d&rsquo;abeilles<\/h2>\n<p>La r\u00e9sistance \u00e0 la corrosion des nids d&rsquo;abeilles d\u00e9pend fortement de la composition chimique du mat\u00e9riau, en particulier de la teneur en <strong>chrome<\/strong>, en <strong>molybd\u00e8ne<\/strong> et en <strong>azote<\/strong> (valeur PREN).<\/p>\n<p>Les mat\u00e9riaux les plus couramment utilis\u00e9s pour contrer ce ph\u00e9nom\u00e8ne sont les suivants :<\/p>\n<ul>\n<li><a href=\"https:\/\/mfinox.com\/fr\/materiaux\/acier-inoxydable-werkstoff-1-4401-aisi-316-uns-s31600\/\"><strong>AISI 316 \/ 316L<\/strong><\/a> &#8211; convient pour des conditions mod\u00e9r\u00e9es ;<\/li>\n<li><a href=\"https:\/\/mfinox.com\/fr\/materiaux\/acier-inoxydable-aisi-904l-uns-n08904-w-1-4539-3\/\"><strong>904L<\/strong><\/a> &#8211; haute r\u00e9sistance aux environnements acides et chlor\u00e9s ;<\/li>\n<li><a href=\"https:\/\/mfinox.com\/fr\/materiaux\/super-duplex-a182-f53-uns-s32750-w-1-4410-saf-2507\/\"><strong>Super duplex UNS S32750<\/strong><\/a> &#8211; excellente r\u00e9sistance aux piq\u00fbres et aux fissures ;<\/li>\n<li><a href=\"https:\/\/mfinox.com\/fr\/materiaux\/super-duplex-a182-f55-uns-s32760-werkstoff-1-4501\/\"><strong>Super duplex UNS S32760<\/strong><\/a> &#8211; convient aux environnements extr\u00eamement agressifs.<\/li>\n<\/ul>\n<\/section>\n<footer>\n<h2>Conclusion<\/h2>\n<p>La <strong>corrosion alv\u00e9olaire<\/strong> est un facteur de risque majeur pour la durabilit\u00e9 des aciers inoxydables et des syst\u00e8mes de fixation dans des environnements agressifs. Les normes <strong>ASTM G48<\/strong> et <strong>ASTM A262<\/strong> sont des outils fondamentaux pour \u00e9valuer le comportement des mat\u00e9riaux et pr\u00e9venir les d\u00e9faillances critiques. <\/p>\n<p>Une interpr\u00e9tation correcte de ces tests, combin\u00e9e au choix du mat\u00e9riau appropri\u00e9, permet de concevoir des implants plus s\u00fbrs, plus fiables et plus durables.<\/p>\n<\/footer>\n<\/article>\n","protected":false},"excerpt":{"rendered":"<p>La corrosion localis\u00e9e est l&rsquo;un des m\u00e9canismes les plus insidieux pour les aciers inoxydables et les alliages sp\u00e9ciaux : la reconna\u00eetre et la pr\u00e9venir est essentiel pour la fiabilit\u00e9 des installations. Qu&rsquo;est-ce que la corrosion alv\u00e9olaire ? La corrosion alv\u00e9olaire, souvent assimil\u00e9e \u00e0 la piq\u00fbre, est une forme de corrosion localis\u00e9e qui se manifeste par [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":8604,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-8605","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-non-classifiee"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Corrosion du nid d&#039;abeille : comment l&#039;interpr\u00e9ter selon ASTM G48 et ASTM A262 - M.F. 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La corrosion alv\u00e9olaire, souvent assimil\u00e9e \u00e0 la piq\u00fbre, est une forme de corrosion localis\u00e9e qui se manifeste par [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/mfinox.com\/fr\/corrosion-du-nid-dabeille-comment-linterpreter-selon-astm-g48-et-astm-a262\/\" \/>\n<meta property=\"og:site_name\" content=\"M.F. 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