{"id":4530,"date":"2026-06-25T09:06:50","date_gmt":"2026-06-25T09:06:50","guid":{"rendered":"https:\/\/beiyutitanium.com\/titanium-corrosion-resistance-grade-guide\/"},"modified":"2026-09-06T09:17:05","modified_gmt":"2026-09-06T09:17:05","slug":"titanium-corrosion-resistance-grade-guide","status":"publish","type":"post","link":"https:\/\/beiyutitanium.com\/es\/titanium-corrosion-resistance-grade-guide\/","title":{"rendered":"Calidades de titanio para resistencia a la corrosi\u00f3n | Servicio en agua de mar, \u00e1cido &#038; productos qu\u00edmicos | Beiyu"},"content":{"rendered":"<p><!--c135-answer--><\/p>\n<p>El titanio Grade 2 soporta servicios oxidantes y con cloruros neutros. Grade 7 a\u00f1ade 0,15% de paladio para \u00e1cidos reductores. Grade 12 eleva el umbral de corrosi\u00f3n por resquicio en salmuera caliente. Para titanio sin alear, el manual de corrosi\u00f3n de TIMET sit\u00faa el inicio en resquicios estrechos en salmuera casi neutra en unos 93 &deg;C (200 &deg;F), con ataque poco probable por debajo de 70 &deg;C (158 &deg;F) en salmueras de cloruros; las salmueras concentradas de cloruro de calcio o magnesio pueden provocar ataque localizado por debajo de esa cifra, y un pH menor tambi\u00e9n la reduce. Las soluciones \u00e1cidas con fluoruro quedan fuera del intervalo de aplicaci\u00f3n del titanio en la mayor\u00eda de los casos.<\/p>\n<figure class=\"wp-block-image\"><img decoding=\"async\" src=\"https:\/\/beiyutitanium.com\/wp-content\/uploads\/2026\/08\/titanium-grade-by-medium-decision-flow.svg\" alt=\"Decision flow from service medium to titanium grade: oxidising media and ambient chlorides to Grade 2, hot chloride crevices to Grade 12 then Grade 7, reducing acids to Grade 7, hydrofluoric acid generally ruled out\" loading=\"lazy\"\/><\/figure>\n<p><!--\/c135-answer--><\/p>\n<p>El titanio resiste la corrosi\u00f3n porque forma una pel\u00edcula de \u00f3xido fina, estable y autorreparable. Esta pel\u00edcula es excelente en agua de mar, cloruros y medios oxidantes, y el principal l\u00edmite son los \u00e1cidos reductores fuertes, donde se utilizan en su lugar calidades con paladio y aleaciones de bajo contenido. La calidad adecuada depende del medio de servicio, de la temperatura y de si la corrosi\u00f3n por resquicio representa un riesgo. Esta gu\u00eda relaciona los entornos habituales con la calidad adecuada para cada uno y lo que se debe especificar.<\/p>\n<h2>C\u00f3mo resiste el titanio la corrosi\u00f3n<\/h2>\n<p>La pel\u00edcula pasiva de \u00f3xido se vuelve a formar instant\u00e1neamente si se raya, siempre que haya ox\u00edgeno o agua presentes. Por ello, el titanio comercialmente puro ofrece tan buen rendimiento en agua de mar y \u00e1cidos oxidantes. En \u00e1cidos reductores calientes con poco ox\u00edgeno, la pel\u00edcula es m\u00e1s dif\u00edcil de mantener, por lo que se utiliza una calidad con paladio (Grade 7) o con molibdeno y n\u00edquel (Grade 12) para mantener la superficie pasiva.<\/p>\n<h2>Selecci\u00f3n de calidad seg\u00fan el medio de servicio<\/h2>\n<table>\n<thead>\n<tr>\n<th>Entorno de servicio<\/th>\n<th>Calidad adecuada<\/th>\n<th>Motivo<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Agua de mar, salmuera, zonas costeras y marinas<\/td>\n<td>Grade 2 (Grade 12 para salmuera caliente)<\/td>\n<td>Pasivo y resistente a la corrosi\u00f3n por picaduras en cloruros<\/td>\n<\/tr>\n<tr>\n<td>\u00c1cidos oxidantes y cloro h\u00famedo<\/td>\n<td>Grade 2<\/td>\n<td>Pel\u00edcula de \u00f3xido estable en medios oxidantes<\/td>\n<\/tr>\n<tr>\n<td>\u00c1cidos reductores (HCl, H2SO4, fosf\u00f3rico) y riesgo de corrosi\u00f3n por resquicio<\/td>\n<td>Grade 7, Grade 12<\/td>\n<td>El paladio o Mo-Ni aumentan la pasividad y resisten el ataque por resquicio<\/td>\n<\/tr>\n<tr>\n<td>Cloruros calientes, salmuera y servicio \u00e1cido<\/td>\n<td>Grade 12<\/td>\n<td>Resistencia al resquicio y a la salmuera caliente con resistencia intermedia<\/td>\n<\/tr>\n<tr>\n<td>Resistencia mec\u00e1nica m\u00e1s resistencia a la corrosi\u00f3n (bombas, ejes, v\u00e1lvulas, elementos de fijaci\u00f3n)<\/td>\n<td>Grade 5, Grade 23<\/td>\n<td>Alta resistencia con buena resistencia general a la corrosi\u00f3n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Aplicaciones habituales<\/h2>\n<p>Grade 2 es la calidad de uso general para intercambiadores de calor de proceso qu\u00edmico, reactores, columnas y tuber\u00edas, para los evaporadores y condensadores de plantas de desalinizaci\u00f3n MSF y MED, y para tuber\u00edas de agua de mar y servicio offshore. Grade 7 y Grade 12 se especifican cuando el proceso utiliza \u00e1cidos reductores, salmuera caliente o condiciones de cloruros que supondr\u00edan riesgo de corrosi\u00f3n por resquicio en titanio comercialmente puro. Grade 5 y Grade 23 se utilizan cuando la pieza debe soportar carga adem\u00e1s de resistir la corrosi\u00f3n, como en componentes de bombas y v\u00e1lvulas.<\/p>\n<table data-c180=\"1\">\n<thead>\n<tr>\n<th>Calidad<\/th>\n<th>D\u00f3nde indica la gu\u00eda que se utiliza<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Grade 2<\/td>\n<td>Intercambiadores de calor, reactores, columnas y tuber\u00edas para procesos qu\u00edmicos; evaporadores y condensadores de plantas desalinizadoras MSF y MED; tuber\u00edas de agua de mar y servicio en instalaciones marinas<\/td>\n<\/tr>\n<tr>\n<td>Grade 7 y Grade 12<\/td>\n<td>Cuando el proceso utiliza \u00e1cidos reductores, salmuera caliente o condiciones con cloruros que supondr\u00edan un riesgo de corrosi\u00f3n por resquicio para el titanio comercialmente puro<\/td>\n<\/tr>\n<tr>\n<td>Grade 5 y Grade 23<\/td>\n<td>Cuando la pieza debe soportar cargas adem\u00e1s de resistir la corrosi\u00f3n, como en componentes de bombas y v\u00e1lvulas<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Para dep\u00f3sitos, tuber\u00edas, v\u00e1lvulas y boquillas de una l\u00ednea de dosificaci\u00f3n o llenado, consulte c\u00f3mo se aplican esas selecciones de calidad a <a href=\"https:\/\/beiyutitanium.com\/es\/titanium-wetted-parts-filling-equipment\/\">las piezas de titanio en contacto con el fluido en equipos de llenado de l\u00edquidos<\/a>.<\/p>\n<h2>Formas y c\u00f3mo especificarlas<\/h2>\n<table data-c180=\"1\">\n<caption>La misma calidad se suministra en distintas formas de producto, por lo que la selecci\u00f3n seg\u00fan la corrosi\u00f3n y la forma se especifican conjuntamente.<\/caption>\n<thead>\n<tr>\n<th>Forma del producto<\/th>\n<th>Norma que debe citarse<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Chapa fina y chapa gruesa<\/td>\n<td>ASTM B265<\/td>\n<\/tr>\n<tr>\n<td>Tubo<\/td>\n<td>ASTM B338<\/td>\n<\/tr>\n<tr>\n<td>Barra<\/td>\n<td>ASTM B348<\/td>\n<\/tr>\n<tr>\n<td>Piezas forjadas<\/td>\n<td>ASTM B381<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>La misma calidad se suministra en distintas formas de producto, por lo que la selecci\u00f3n para corrosi\u00f3n y la forma se especifican conjuntamente. Indique la calidad, la norma (ASTM B265 para chapa fina y chapa gruesa, B338 para tubo, B348 para barra, B381 para piezas forjadas), la forma y las dimensiones, el medio y la temperatura, y el alcance del certificado. El material se suministra con certificados de materiales y certificado de inspecci\u00f3n EN 10204 3.1 seg\u00fan el alcance del pedido.<\/p>\n<table data-c180=\"1\">\n<thead>\n<tr>\n<th>Campo que debe indicarse<\/th>\n<th>Qu\u00e9 aportar<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Calidad<\/td>\n<td>La calidad que exigen las condiciones de corrosi\u00f3n del servicio<\/td>\n<\/tr>\n<tr>\n<td>Norma<\/td>\n<td>La norma de producto correspondiente a la forma solicitada<\/td>\n<\/tr>\n<tr>\n<td>Forma y dimensiones<\/td>\n<td>La forma y sus dimensiones<\/td>\n<\/tr>\n<tr>\n<td>Medio y temperatura<\/td>\n<td>El medio de servicio y la temperatura de funcionamiento<\/td>\n<\/tr>\n<tr>\n<td>Alcance del certificado<\/td>\n<td>El material se suministra con certificados de materiales y EN 10204 3.1 seg\u00fan el alcance del pedido<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Consulte c\u00f3mo se comparan las calidades en conjunto en la <a href=\"https:\/\/beiyutitanium.com\/es\/titanium-grades-comparison-guide\/\">gu\u00eda comparativa de calidades de titanio<\/a>, despu\u00e9s elija una forma: <a href=\"https:\/\/beiyutitanium.com\/es\/product-category\/woo-products\/titanium\/titanium-bar\/\">barra de titanio<\/a>, <a href=\"https:\/\/beiyutitanium.com\/es\/product-category\/woo-products\/titanium\/titanium-sheet-and-plate\/\">chapa fina y chapa gruesa de titanio<\/a>, o <a href=\"https:\/\/beiyutitanium.com\/es\/product-category\/woo-products\/titanium\/titanium-tube-and-pipe\/\">tubo y tuber\u00eda de titanio<\/a>. Para una comparaci\u00f3n m\u00e1s amplia de materiales, lea la <a href=\"https:\/\/beiyutitanium.com\/es\/titanium-vs-stainless-steel\/\">gu\u00eda de titanio frente a acero inoxidable<\/a>. Env\u00ede el medio y los requisitos a <a href=\"mailto:penn@beiyutitanium.com\">penn@beiyutitanium.com<\/a> para obtener una recomendaci\u00f3n de calidad y una oferta.<\/p>\n<section class=\"beiyu-author-bio\" data-codex-c44-author-bio=\"penn-ma\">\n<h2>Acerca del autor<\/h2>\n<p><strong>Penn Ma<\/strong> dirige el negocio internacional de Beiyu Titanium y responde personalmente a sus solicitudes de oferta, comprobando la calidad, la norma, las dimensiones, la tolerancia y el alcance del certificado frente a la capacidad de la f\u00e1brica antes de comunicar un precio. Cuenta con 15 a\u00f1os de experiencia en la exportaci\u00f3n de titanio, con barras, varillas, chapas gruesas, tubos, bloques, anillos, bobinas, lingotes, piezas forjadas y piezas mecanizadas, y utiliza a diario documentaci\u00f3n EN 10204 3.1 y trazabilidad por n\u00famero de colada. Antes de Beiyu trabaj\u00f3 en Koch (Koch-Glitsch) y particip\u00f3 directamente en la ejecuci\u00f3n de un proyecto petroqu\u00edmico de SABIC en Fujian, China, de donde proceden las pr\u00e1cticas del comprador que sustentan este sitio: planes de inspecci\u00f3n y ensayo, certificaci\u00f3n de materiales y trazabilidad por n\u00famero de colada, coordinaci\u00f3n de la inspecci\u00f3n por tercera parte y control de expedientes de proyecto. <a href=\"https:\/\/beiyutitanium.com\/es\/penn-ma\/\">Leer el perfil completo del autor<\/a>.<\/p>\n<\/section>\n<p><!--c136-cite-block--><\/p>\n<h2>Convertir una decisi\u00f3n sobre corrosi\u00f3n en l\u00edneas del pedido<\/h2>\n<p>Una calidad seleccionada por motivos de corrosi\u00f3n a\u00fan debe comprarse, y los campos que determinan si el material entregado corresponde a la decisi\u00f3n no son campos de corrosi\u00f3n. En tres de ellos es donde las consultas suelen quedarse incompletas.<\/p>\n<table>\n<thead>\n<tr>\n<th>Campo del pedido<\/th>\n<th>Por qu\u00e9 la decisi\u00f3n sobre corrosi\u00f3n depende de ello<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Calidad con su n\u00famero UNS<\/td>\n<td>Los n\u00fameros de calidad se repiten entre especificaciones, y el n\u00famero UNS es el que fija la tabla de composici\u00f3n<\/td>\n<\/tr>\n<tr>\n<td>Medio de servicio, concentraci\u00f3n y temperatura<\/td>\n<td>Una calidad se selecciona en funci\u00f3n de los tres, por lo que citar solo uno no constituye una base de selecci\u00f3n<\/td>\n<\/tr>\n<tr>\n<td>Especificaci\u00f3n aplicable<\/td>\n<td>Establece los l\u00edmites frente a los que informa el certificado para la forma adquirida<\/td>\n<\/tr>\n<tr>\n<td>Forma del producto con dimensiones y tolerancia<\/td>\n<td>La misma calidad supone una compra diferente como barra, chapa gruesa, tubo o alambre<\/td>\n<\/tr>\n<tr>\n<td>Estado de entrega y superficie<\/td>\n<td>Dos campos separados, y la superficie es la que entra en contacto con el medio<\/td>\n<\/tr>\n<tr>\n<td>Informes requeridos<\/td>\n<td>Determina si el certificado responde a lo que solicitar\u00e1 la inspecci\u00f3n de recepci\u00f3n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>El estado superficial, el marcado, el embalaje, los informes exigidos y el destino del material rechazado son datos que se espera que contenga un pedido en la especificaci\u00f3n de barras y tochos ASTM B348 (ASTM B348, informaci\u00f3n para pedidos). Una calidad elegida cuidadosamente y luego indicada en el pedido solo mediante su n\u00famero deja todos esos datos al criterio predeterminado.<\/p>\n<h2>Detalles de especificaci\u00f3n con fuentes<\/h2>\n<p>Para titanio sin alear en resquicios estrechos en salmuera saturada de cloruro s\u00f3dico casi neutra, Corrosion Resistance of Titanium de TIMET informa de que el ataque se vuelve posible a partir de unos 93 \u00b0C (200 \u00b0F), mientras que no es probable por debajo de 70 \u00b0C (158 \u00b0F); un pH menor o concentraciones elevadas de iones de calcio o magnesio pueden reducir la temperatura de inicio. Ese intervalo explica por qu\u00e9 las caras de junta y las uniones de tubo a placa tubular en servicio con salmuera caliente reciben la revisi\u00f3n m\u00e1s minuciosa.<\/p>\n<p>Cuando el servicio se encuentra dentro de ese intervalo de riesgo, las calidades con paladio cambian la situaci\u00f3n: Grade 7 (UNS R52400) incorpora de 0.12 a 0.25 wt% de paladio conforme a los requisitos qu\u00edmicos de <a href=\"https:\/\/store.astm.org\/standards\/b265\" target=\"_blank\" rel=\"noopener\">ASTM B265<\/a>, y Grade 12 (UNS R53400) utiliza de 0.2 a 0.4 wt% de molibdeno con de 0.6 a 0.9 wt% de n\u00edquel para aumentar la resistencia a la corrosi\u00f3n por resquicio con un menor coste de aleaci\u00f3n que Grade 7.<\/p>\n<p>Una vez elegida la calidad, las comparaciones de proveedores por familia de productos se recopilan en el <a href=\"https:\/\/beiyutitanium.com\/es\/titanium-supplier-lists-index\/\">\u00edndice de listas de proveedores de titanio<\/a>.<\/p>\n<h2>Fuentes de referencia<\/h2>\n<ul>\n<li>TIMET, Corrosion Resistance of Titanium (manual t\u00e9cnico)<\/li>\n<li>ASTM B265 \/ B338 \/ B348 \/ B381, especificaciones de productos de titanio<\/li>\n<li><a href=\"https:\/\/store.astm.org\/standards\/g48\" target=\"_blank\" rel=\"noopener\">ASTM G48<\/a>, M\u00e9todos de ensayo normalizados para la resistencia a la corrosi\u00f3n por picaduras y por resquicio<\/li>\n<li>Bibliograf\u00eda de NACE \/ AMPP sobre corrosi\u00f3n del titanio en servicio con cloruros y \u00e1cidos reductores<\/li>\n<li>ASM Handbook, volumen 13B, Corrosi\u00f3n: materiales<\/li>\n<\/ul>\n<p><!--\/c136-cite-block--><\/p>","protected":false},"excerpt":{"rendered":"<p>Titanium Grade 2 handles oxidising and neutral chloride service. Grade 7 adds 0.15% palladium for reducing acids. Grade 12 raises the crevice threshold in hot brine. For unalloyed titanium the TIMET corrosion manual puts the onset in sharp crevices in near-neutral brine at about 93 &deg;C (200 &deg;F), with attack not likely below 70 &deg;C [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":4754,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_templately_pack_id":"","_templately_imported_at":"","_templately_source":"","_templately_import_session_id":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[27,137],"tags":[],"class_list":["post-4530","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","category-technical-guides"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Titanium Grades for Corrosion Resistance | Beiyu Titanium<\/title>\n<meta name=\"description\" content=\"How to choose a titanium grade for corrosion service: Grade 2 for seawater and oxidising media, Grade 7 and Grade 12 for reducing acids and hot brine, Grade 5 for strength, mapped to chemical, marine and desalination applications.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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Esas son las mismas cuatro cosas que un comprador de la industria de procesos o regulada exigir\u00e1 a un proveedor de titanio, y haber tenido que aplicarlas como cliente es la raz\u00f3n por la que aqu\u00ed se tratan como parte del suministro y no como documentaci\u00f3n elaborada posteriormente. Su trabajo diario abarca las cuestiones que este sitio est\u00e1 concebido para responder: elegir entre calidades de titanio comercialmente puro y aleado para un servicio corrosivo, interpretar un certificado de materiales frente a la norma solicitada y relacionar la designaci\u00f3n de un comprador (calidad ASTM, UNS, n\u00famero Werkstoff alem\u00e1n o c\u00f3digo NF franc\u00e9s) con el mismo metal en distintos mercados. 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