铬酸钝化
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chromic acid passivation bath 铬酸钝化液
Chromic acid passivation and oiling 铬酸盐钝化加涂油
Zinc plating chromic acid salt after the passivation, corrosion resistance can improve 6 to 8 times.
锌镀层经铬酸盐钝化之后，耐蚀性可提高6 ~ 8倍。
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