{"id":9856,"date":"2021-08-11T08:00:13","date_gmt":"2021-08-11T08:00:13","guid":{"rendered":"http:\/\/www.alalloycasting.com\/?p=9856"},"modified":"2021-08-11T08:00:13","modified_gmt":"2021-08-11T08:00:13","slug":"non-sodium-flux","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/es\/non-sodium-flux\/","title":{"rendered":"Fundente sin sodio"},"content":{"rendered":"<p>Como fundente para a\u00f1adir Na, se utilizan ampliamente los fundentes a base de sodio, compuestos principalmente por NaF y NaCl. El Na suele tener el efecto de favorecer la dispersi\u00f3n de los poros en las piezas de fundici\u00f3n de aluminio, pero debido a la reacci\u00f3n con la humedad del aire, incluso si el metal fundido contiene solo unas pocas partes por mill\u00f3n (ppm) de Na, es f\u00e1cil que se forme una concentraci\u00f3n m\u00e1s elevada de hidr\u00f3geno, lo que favorece la oxidaci\u00f3n de la superficie del metal fundido y la formaci\u00f3n de escoria. Adem\u00e1s, en las aleaciones de aluminio de la serie 5000 que contienen Mg como principal componente de la aleaci\u00f3n, una peque\u00f1a cantidad de Na puede provocar fragilizaci\u00f3n en los l\u00edmites de grano y causar un deterioro significativo de la elongaci\u00f3n y otras propiedades. Por lo tanto, el fundente sin sodio se utiliza ampliamente como fundente para la eliminaci\u00f3n de escoria de las aleaciones de aluminio fundido en las l\u00edneas de producci\u00f3n de fundici\u00f3n en las que no se desea a\u00f1adir Na.<\/p>\n<p>El fundente sin sodio contiene principalmente fundentes a base de cloruro, como MgCl\u2082, CaCl\u2082, KCl, etc., que tienen un efecto de eliminaci\u00f3n de escoria y no contienen sales de sodio, y se mezclan con componentes que pueden mejorar la reactividad del aluminio fundido, como KAIF, AlF\u2083, K\u2082SO\u2084, etc. Sin embargo, entre los fundentes a base de cloruro, el MgCl\u2082 y el CaCl\u2082 son higrosc\u00f3picos y deben almacenarse con cuidado. Si el fundente que absorbe humedad entra en contacto directo con el aluminio fundido, existe el peligro de que se produzca una explosi\u00f3n de vapor de agua. Por lo tanto, si es posible, debe evitarse en la medida de lo posible el uso de MgCl\u2082 y CaCl\u2082. Adem\u00e1s, si el MgCl\u2082 o el CaCl\u2082 reaccionan con la aleaci\u00f3n de aluminio fundido, desprender\u00e1n un olor y reducir\u00e1n la eficiencia del trabajo. Por las razones anteriores, a menos que se utilicen en un horno cerrado, los fundentes a base de cloruro no suelen emplearse.<\/p>\n<p>Por lo tanto, en la l\u00ednea de producci\u00f3n de fundici\u00f3n en la que no se desea la presencia de Na, como <a href=\"http:\/\/www.alalloycasting.com\/es\/molten-metal-flux\/\">fundente para metal fundido<\/a>\u00a0Para la eliminaci\u00f3n de escoria, el fundente sin sodio contiene KCl \u2014que tiene un efecto de eliminaci\u00f3n de escoria\u2014 como componente principal, y tambi\u00e9n contiene un componente que mejora la reactividad con el metal fundido, como KAIF\u2083, AlF\u2083 o K\u2082SO\u2084.<\/p>","protected":false},"excerpt":{"rendered":"<p>As a flux for adding Na, sodium-based fluxes mainly composed of NaF and NaCl are widely used. Na usually has the effect of promoting pore&hellip;<\/p>","protected":false},"author":1,"featured_media":9857,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[233],"tags":[122,12346,12344,123,12345],"class_list":["post-9856","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-aluminum-casting-flux","tag-molten-aluminum-alloys","tag-non-sodium-flux","tag-refining-flux","tag-slag-removal"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Non sodium Flux for Slag Removal in Molten Aluminum Alloys<\/title>\n<meta name=\"description\" content=\"Non sodium flux is widely used as a flux for slag removal of molten aluminum alloys in casting production lines where it is no Na.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, 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