{"id":6358,"date":"2020-08-25T08:10:43","date_gmt":"2020-08-25T08:10:43","guid":{"rendered":"https:\/\/www.kaysuns.com\/?p=6358"},"modified":"2026-03-09T05:43:44","modified_gmt":"2026-03-09T05:43:44","slug":"introducao-monel-400-de-liga-resistente-a-corrosao-de-cobre-e-niquel","status":"publish","type":"blog","link":"https:\/\/www.kaysuns.com\/pt\/blog\/introducao-monel-400-de-liga-resistente-a-corrosao-de-cobre-e-niquel\/","title":{"rendered":"Introdu\u00e7\u00e3o: Monel 400 de liga resistente \u00e0 corros\u00e3o de n\u00edquel-cobre"},"content":{"rendered":"

O desempenho e a aplica\u00e7\u00e3o da liga Monel 400<\/strong><\/h2>\n\n\n
\n
\"Monel<\/figure>\n<\/div>\n\n\n

O Monel 400 tamb\u00e9m \u00e9 chamado de Ni68Cu28Fe, dois dos quais s\u00e3o comumente usados n\u00edquel-cobre. ligas resistentes \u00e0 corros\u00e3o<\/a>, e o outro \u00e9 Ni68Cu28A1.<\/p>\n\n\n\n

Monel 400 \u00e9 uma liga de n\u00edquel-cobre resistente \u00e0 corros\u00e3o com a maior quantidade, a mais ampla aplica\u00e7\u00e3o e o melhor desempenho abrangente. Devido \u00e0 diferen\u00e7a na composi\u00e7\u00e3o qu\u00edmica, ela pode ter uma variedade de graus de liga, mas n\u00e3o h\u00e1 diferen\u00e7a significativa em resist\u00eancia \u00e0 corros\u00e3o<\/a> entre eles.<\/p>\n\n\n\n

Composi\u00e7\u00e3o qu\u00edmica e caracter\u00edsticas organizacionais do Monel 400<\/strong><\/h3>\n\n\n\n

A composi\u00e7\u00e3o qu\u00edmica da liga Monel 400 e Tubo Monel 400<\/a> \u00e9 composto principalmente de 30% Cu e 65% Ni mais uma pequena quantidade de Fe (1%-2%), e a estrutura \u00e9 uma estrutura t\u00edpica de austenita monof\u00e1sica. Como o n\u00edquel e o cobre s\u00e3o mutuamente sol\u00faveis em qualquer propor\u00e7\u00e3o, geralmente n\u00e3o h\u00e1 precipita\u00e7\u00e3o de fase intermet\u00e1lica.<\/p>\n\n\n\n

Observando a estrutura desta liga sob condi\u00e7\u00f5es de n\u00e3o corros\u00e3o sob um microsc\u00f3pio metalogr\u00e1fico, pode-se observar que h\u00e1 inclus\u00f5es n\u00e3o met\u00e1licas muito dispersas na matriz de austenita. Por exemplo, sulfetos e silicatos, carbonetos tamb\u00e9m podem ser observados sob certas condi\u00e7\u00f5es.<\/p>\n\n\n\n

Resist\u00eancia \u00e0 corros\u00e3o<\/strong><\/h3>\n\n\n\n

As ligas de n\u00edquel-cobre s\u00e3o mais resistentes \u00e0 corros\u00e3o por meio de redu\u00e7\u00e3o do que o n\u00edquel puro e mais resistentes \u00e0 corros\u00e3o por ectoplasma oxidante do que o cobre puro. A liga Ni68Cu28Fe n\u00e3o \u00e9 exce\u00e7\u00e3o. Como a liga Ni68Cu28Fe tem uma estrutura de austenita monof\u00e1sica, n\u00e3o h\u00e1 corros\u00e3o causada pela rea\u00e7\u00e3o galv\u00e2nica entre as diferentes fases da liga multif\u00e1sica.<\/p>\n\n\n\n

A liga tem alta resist\u00eancia \u00e0 corros\u00e3o na atmosfera e \u00e9 uma liga extremamente resistente \u00e0 corros\u00e3o. Em \u00e1gua natural e \u00e1gua destilada, a liga \u00e9 extremamente resistente \u00e0 corros\u00e3o e a taxa de corros\u00e3o \u00e9 geralmente \u22640,025 mm \/ a. (incluindo diferentes temperaturas, diferentes taxas de fluxo e muitas condi\u00e7\u00f5es adversas de enchimento de ar). <\/p>\n\n\n\n

Na lama \u00e1cida contendo sais oxidantes, a corros\u00e3o da liga aumentar\u00e1, mas ainda est\u00e1 entre os materiais resistentes \u00e0 corros\u00e3o.<\/p>\n\n\n\n

Aplica\u00e7\u00f5es<\/strong><\/h3>\n\n\n\n

Ele pode ser usado para fabricar eixos de bombas, tubos de transfer\u00eancia de calor e impulsores. Na \u00e1gua do mar, outro uso importante do Ni68Cu28Fe \u00e9 a fabrica\u00e7\u00e3o de pe\u00e7as estruturais que evitam a corros\u00e3o da \u00e1gua do mar na zona de respingo de plataformas de produ\u00e7\u00e3o de petr\u00f3leo. A taxa de corros\u00e3o de Ni68Cu28Fe em \u00e1gua do mar fortemente agitada com a presen\u00e7a de ar geralmente n\u00e3o excede 0,026 mm \/ a. <\/p>\n\n\n\n

No entanto, a liga Ni68Cu28Fe \u00e9 propensa a corros\u00e3o por pite em \u00e1gua do mar parada. No ar e no oxig\u00eanio, a resist\u00eancia \u00e0 oxida\u00e7\u00e3o dessa liga \u00e9 menor do que a do n\u00edquel puro, e a temperatura m\u00e1xima de trabalho pode ser 600 \u00b0 C. Em condi\u00e7\u00f5es de alta temperatura contendo g\u00e1s HF, quando o oxig\u00eanio est\u00e1 presente ou sob condi\u00e7\u00f5es de condensa\u00e7\u00e3o, esta liga geralmente n\u00e3o \u00e9 usada.<\/p>\n\n\n\n

Postado por conex\u00f5es para tubos de a\u00e7o inoxid\u00e1vel<\/a> fornecedor, kaysuns<\/p>","protected":false},"featured_media":6359,"template":"","categories":[186],"tags":[],"class_list":["post-6358","blog","type-blog","status-publish","has-post-thumbnail","hentry","category-stainless-steel-knowledge"],"yoast_head":"\nIntroduction: Monel 400 Of Nickel-copper Corrosion Resistant Alloy<\/title>\n<meta name=\"description\" content=\"Monel 400 is also called Ni68Cu28Fe, two of which are commonly used nickel-copper corrosion resistant alloys, and the other is Ni68Cu28A1.\" \/>\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\/introducao-monel-400-de-liga-resistente-a-corrosao-de-cobre-e-niquel\/\" \/>\n<meta property=\"og:locale\" content=\"pt_BR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" 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