{"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":"corrosao-galvanica-em-tubos-de-aco-inoxidavel-duplex-2205","status":"publish","type":"blog","link":"https:\/\/www.kaysuns.com\/pt\/blog\/corrosao-galvanica-em-tubos-de-aco-inoxidavel-duplex-2205\/","title":{"rendered":"Corros\u00e3o galv\u00e2nica em tubo de a\u00e7o inoxid\u00e1vel 2205 duplex"},"content":{"rendered":"

Para a corros\u00e3o galv\u00e2nica do duplex 2205 tubo de a\u00e7o inoxid\u00e1vel<\/a>, os fatores de influ\u00eancia s\u00e3o mais complicados.<\/p>\n\n\n

\n
\"tubos
tubos de a\u00e7o inoxid\u00e1vel duplex<\/figcaption><\/figure>\n<\/div>\n\n\n

Al\u00e9m da natureza do material que entra em contato com o tubo de a\u00e7o duplex, ele tamb\u00e9m \u00e9 afetado por v\u00e1rios outros fatores.<\/p>\n\n\n\n

O primeiro \u00e9 o efeito de \u00e1rea do tubo duplex: a taxa de corros\u00e3o galv\u00e2nica est\u00e1 relacionada \u00e0 raz\u00e3o de \u00e1rea das fases an\u00f3dica e cat\u00f3dica. Geralmente, aumentar a \u00e1rea do \u00e2nodo pode reduzir a taxa de corros\u00e3o. Sabendo do princ\u00edpio da corros\u00e3o eletroqu\u00edmica, anodos pequenos e catodos grandes t\u00eam maior probabilidade de formar corros\u00e3o galv\u00e2nica. Por exemplo, a corros\u00e3o de pe\u00e7as de teste com rebites de ferro em tubos de a\u00e7o inoxid\u00e1vel 2205 imersos em \u00e1gua do mar \u00e9 o caso, e os rebites de ferro ser\u00e3o severamente corro\u00eddos. Ao contr\u00e1rio, a conex\u00e3o entre o \u00e2nodo grande e o c\u00e1todo pequeno n\u00e3o est\u00e1 sujeita \u00e0 corros\u00e3o galv\u00e2nica. Se houver rebites de cobre em uma grande placa de ferro, o efeito galv\u00e2nico \u00e9 bastante reduzido.<\/p>\n\n\n\n

Se a corros\u00e3o galv\u00e2nica de tubos duplex 2205 for controlada por difus\u00e3o cat\u00f3dica, o efeito da raz\u00e3o de \u00e1rea do \u00e2nodo e do c\u00e1todo na taxa de corros\u00e3o \u00e9 mais complicado. Por exemplo, quando o despolarizador cat\u00f3dico (oxidante) \u00e9 oxig\u00eanio, o processo cat\u00f3dico \u00e9 freq\u00fcentemente controlado pela difus\u00e3o de oxig\u00eanio. O c\u00e1todo met\u00e1lico funciona apenas como um eletrodo de oxig\u00eanio.<\/p>\n\n\n\n

O segundo \u00e9 o fator de ambiente de instala\u00e7\u00e3o do tubo de a\u00e7o inoxid\u00e1vel 2205 duplex. Para corros\u00e3o galv\u00e2nica, o ambiente com fatores ambientais muito diferentes tem corrosividade diferente, e o grau de corros\u00e3o do a\u00e7o duplex tamb\u00e9m \u00e9 diferente.<\/p>\n\n\n\n

Geralmente, metais com menor resist\u00eancia \u00e0 corros\u00e3o<\/a> em determinados ambientes s\u00e3o os \u00e2nodos de casais galv\u00e2nicos. \u00c0s vezes, o potencial do mesmo casal galv\u00e2nico ser\u00e1 invertido em diferentes ambientes, alterando assim a polaridade do material. Por exemplo, ap\u00f3s o acoplamento do a\u00e7o e do zinco, o zinco \u00e9 corro\u00eddo em algumas solu\u00e7\u00f5es aquosas e o a\u00e7o \u00e9 protegido. Se a temperatura da \u00e1gua for mais alta (acima de 80 \u00b0C), a polaridade do par galv\u00e2nico ser\u00e1 invertida e o tubo de a\u00e7o ser\u00e1 corro\u00eddo como \u00e2nodo. Outro exemplo \u00e9 o acoplamento de magn\u00e9sio e alum\u00ednio em uma solu\u00e7\u00e3o neutra ou levemente \u00e1cida de cloreto de s\u00f3dio, e o magn\u00e9sio \u00e9 an\u00f3dico. No entanto, \u00e0 medida que o magn\u00e9sio continua a se dissolver, a solu\u00e7\u00e3o se torna alcalina, de modo que o alum\u00ednio se torna \u00e2nodo.<\/p>\n\n\n\n

Os efeitos da corros\u00e3o galv\u00e2nica ocorrem facilmente nas juntas de tubos de a\u00e7o inoxid\u00e1vel duplex<\/a>. Isso ocorre porque a distribui\u00e7\u00e3o da corrente de corros\u00e3o do metal do \u00e2nodo na corros\u00e3o galv\u00e2nica n\u00e3o \u00e9 uniforme, e a corros\u00e3o acelerada causada pelo efeito galv\u00e2nico \u00e9 maior na junta. Quanto mais longe da junta, menor \u00e9 a corros\u00e3o. Al\u00e9m disso, a condutividade do meio tamb\u00e9m afetar\u00e1 a taxa de corros\u00e3o galv\u00e2nica.<\/p>\n\n\n\n

\n\n\n\n

Postado por KAYSUNS, o fornecedor de acess\u00f3rios para tubos 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":"\nGalvanic 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\/pt\/blog\/corrosao-galvanica-em-tubos-de-aco-inoxidavel-duplex-2205\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\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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