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PRODUCTION OF BEAUTIFULLY SPANGLED CHROMATED LEAD-CONTAINING HOT-DIP GALVANIZED STEEL SHEET EXCELLENT IN RESISTANCE TO BLACKENING AND WHITE RUST
PRODUCTION OF BEAUTIFULLY SPANGLED CHROMATED LEAD-CONTAINING HOT-DIP GALVANIZED STEEL SHEET EXCELLENT IN RESISTANCE TO BLACKENING AND WHITE RUST
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机译:出色的抗变色,含铬热浸镀锌钢板的抗变黑和白色锈蚀
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PROBLEM TO BE SOLVED: To obtain the steel sheet without being flushed with Ni, etc., by chromating a lead-contg. hot-dip galvanized steel sheet produced at specified galvanizing bath temp. and penetration sheet temp. with a chromating soln. contg. nitrate ion and having a specified composition. ;SOLUTION: A steel sheet is plated at 440-500°C plating bath temp. and 440-520°C penetration sheet temp. in a hot-dip galvanizing bath contg. 0.05-0.3wt.% Pb and 0.1-0.3wt.% Al. A chromating soln. contg. chromium (VI) ion, chromium (III) ion and nitrate ion and with the molar ratio of chromium (III) ion to chromium (VI) ion controlled to 1/9 to 1/1 and the molar ratio of nitrate ion to total chromium ion to 0.1 to 1.6 is applied on the galvanized steel sheet and dried at 40-250°C sheet temp. without being washed with water to form a chromate film at 5-50mg/m2 coating weight, expressed in terms of metallic chromium.;COPYRIGHT: (C)1998,JPO
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机译:解决的问题:通过对含铅量进行铬化处理而获得的钢板不经镍等冲洗。在规定的镀锌浴温度下生产的热浸镀锌钢板。和渗透片温度用铬酸盐溶液。续硝酸根离子,具有特定的组成。 ;解决方案:钢板在440-500°C的电镀浴温度下进行电镀。和440-520°C的渗透板温度在连续的热浸镀锌浴中。 0.05-0.3重量%的Pb和0.1-0.3重量%的Al。铬酸盐溶液。续铬(VI)离子,铬(III)离子和硝酸根离子,并且铬(III)离子与铬(VI)离子的摩尔比控制为1/9至1/1,硝酸根离子与总铬的摩尔比在镀锌钢板上施加0.1至1.6的离子,并在40-250℃的钢板温度下干燥。无需用水洗涤即可形成5-50mg / m 2 Sup>涂层重量的铬酸盐膜,以金属铬表示。;版权所有:(C)1998,日本特许厅
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