tubo sin soldadura de acero inoxidable<\/a> decapado y pasivaci\u00f3n<\/strong><\/p>\n(1) F\u00e1rmaco de pasivaci\u00f3n de decapado HNO3 6% \uff5e 25% + HF 0.5% \uff5e 8% (fracci\u00f3n de volumen) \uff1a<\/p>\n
temperatura 21 \u2103 \uff5e 60 \u2103; tiempo seg\u00fan sea necesario; o f\u00e1rmaco citrato de amonio 5% \uff5e 10% Masa molar); temperatura 49 \u2103 \uff5e 71 \u2103; tiempo 10min \uff5e 60min.<\/p>\n
(2) F\u00e1rmaco de tratamiento pasivo HNO3 20% \uff5e 50% (fracci\u00f3n de volumen):<\/p>\n
temperatura 49 \uff5e 71 \u2103; tiempo 10 min \uff5e 30 min; o temperatura 2l \uff5e 38 \u2103; tiempo 30 min \uff5e 60 min; o f\u00e1rmaco HNO320% \uff5e 50% + Na2Cr207H2O 22% \uff5e 6% (masa molar); temperatura 49 \u2103 \uff5e 54 \u2103; tiempo 15 min \uff5e 30 min; o temperatura 21 \u2103 \uff5e 38 \u2103; tiempo 30min \uff5e 60min.<\/p>\n
(3) Medicamento de pasivaci\u00f3n para descalcificar y decapado H2SO4 8% \uff5e 11% (fracci\u00f3n de volumen):<\/p>\n
Temperatura 66 \u2103 \uff5e 82 \u2103; 6 pulgadas 5 min \uff5e 45 min; HNO3 6% \uff5e 25% + HF 0,5% \uff5e 8% (fracci\u00f3n de volumen); temperatura 21 \u2103 \uff5e 60 \u2103; o HNO3 15% \uff5e 25% + HF l % \uff5e 8 (fracci\u00f3n de volumen).<\/p>\n
Soluci\u00f3n de yeso<\/strong><\/p>\n(1) HNO3 25% ~ + 4% HF + 71% condensado (fracci\u00f3n de volumen) y BaSO4, ajustar a espeso. Pasta de pasivaci\u00f3n: 30% HNO3 o 25% + 1% HNO3 (masa molar) K2Cr2O7 y BaSO4 se ajustan para que sean espesos. Aplicar la capa superficial durante 5 a 30 minutos y lavar con agua condensada a pH = 7. Para cada m\u00e1quina y equipo, tambi\u00e9n se puede utilizar un tratamiento de pasivaci\u00f3n qu\u00edmica org\u00e1nica mediante pulverizaci\u00f3n de per\u00f3xido de hidr\u00f3geno.<\/p>\n
(2) Pasta de pasivaci\u00f3n de decapado: HNO3 8% \uff5e 14% (como agente de pasivaci\u00f3n); HF 10% \uff5e 15% (como agente corrosivo); sulfato de magnesio 2.2% \uff5e 2.7% (como emulsionante) nitrato de magnesio 60% \uff5e 70% (como relleno para mejorar la adhesi\u00f3n y la hidrofilia); polifosfato de sodio 2.3% a 2.8% (como inhibidor de la corrosi\u00f3n); agua (ajustar la viscosidad).<\/p>\n
M\u00e9todo electroqu\u00edmico<\/strong><\/p>\nResuelva el problema de anodizar el tuber\u00eda de acero inoxidable<\/a> piezas en espera de revisi\u00f3n y manipular el potencial potenciost\u00e1tico para realizar el tratamiento de anodizaci\u00f3n, o utilizar piezas de acero de tuber\u00eda sin costura de acero inoxidable como electrodo negativo primero y manipular la diferencia potenciost\u00e1tica para realizar el tratamiento cat\u00f3dico.<\/p>\nLuego, se anodiz\u00f3 el acero de la tuber\u00eda sin costura de acero inoxidable y se manipul\u00f3 el potencial potenciost\u00e1tico para realizar el tratamiento de anodizaci\u00f3n, y la diferencia potenciost\u00e1tica se cambi\u00f3 nuevamente para realizar la pasivaci\u00f3n del acero inoxidable. La soluci\u00f3n de electrolito fue HNO3.<\/p>\n
Despu\u00e9s de eso, se mejoran las propiedades de recubrimiento de las tuber\u00edas sin costura de acero inoxidable y se mejora a\u00fan m\u00e1s la resistencia a la corrosi\u00f3n. La diferencia de potencial del umbral de corrosi\u00f3n por grietas (Eb) aumenta en aproximadamente 1000 mV (en 3% NaCl), y la resistencia a la corrosi\u00f3n uniforme se puede mejorar en tres \u00f3rdenes de magnitud (en 20% -30% H2SO4 a 45 \u00b0 C).<\/p>","protected":false},"featured_media":5634,"template":"","categories":[186],"tags":[],"class_list":["post-5633","blog","type-blog","status-publish","has-post-thumbnail","hentry","category-stainless-steel-knowledge"],"yoast_head":"\n
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