据“特开昭”62—20881报道,坂本安平等人发明了1种用含有Fe离子和微量Ni离子的碱溶液处理镀锌系钢板后再用铬酸盐进行处理,使之具有耐划伤、耐油渍、耐变黑以及耐蚀性好的热镀锌铬酸盐处理钢板的制造方法。以往,为了防止划伤,表面涂有防锈油,在防变黑的问题上,特开昭55—131178号公报介绍了在机械加工后,铬酸盐处理前,对热镀锌钢板采用加热的方法;特开昭57—114695号公报报道在热镀锌 According to Japanese Unexamined Patent Publication No. 62-20881, Anping et al. Invented a method of treating a galvanized steel sheet with an alkaline solution containing Fe ions and a trace amount of Ni ions and then treating it with chromate to make it scratch-resistant , Oil stain resistance, blackening resistance, and good corrosion resistance of hot-dip galvanized chromate-treated steel sheet. Conventionally, in order to prevent scratch, the surface is coated with rust preventive oil. On the other hand, in the prevention of blackening, Japanese Unexamined Patent Publication (KOKAI) No. 55-131178 discloses a method of heating a galvanized steel sheet before machining and prior to chromate treatment JP-A-57-114695 discloses a method of hot-dip galvanizing