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目前镀锌层的防蚀处理方法基本上还是铬盐钝化处理,这给污水处理带来了麻烦.前几年虽然有人提出过使用低铬钝化,钛盐钝化,以解决污水排放问题,但因其工艺不成熟或者还存在其某种方面的不足,直止目前还未能广泛推广使用.近来,日本已试验用1%单宁酸水溶液处理镀锌层,其抗蚀能力有提高,而且锌层用单宁酸处理后,再涂漆其结合力比在铬盐钝化膜上涂漆的结合力要好得多.一般在室
At present, the anticorrosive treatment method of galvanized layer is basically chromium passivation, which brings trouble to the sewage treatment. Although a few years ago it was proposed to use low chromium passivation and titanium salt passivation to solve the problem of sewage discharge , But because of its immature technology or there are still some shortcomings, it has not yet been widely promoted to use Recently, Japan has tested 1% tannic acid aqueous solution of zinc coating, the anti-corrosion ability to improve , And the zinc layer treated with tannin, and then paint the binding force than the chromate passivation film coating on the adhesion much better. General in the room