0概述三价铬钝化最早在工业上获得应用的是彩色钝化,其色度是通过在钝化膜中共沉积合金金属或其他金属元素的盐或氧化物而得到加强。黑色钝化膜最先在锌-铁和锌-镍合金镀层上获得,随后通过添加金属黑色氧化物、金属硫化物或磷衍生物,在锌镀层上也获得黑色钝化层。目前该工艺已 0 Overview Trivalent chromium passivation was first used commercially for color passivation, the chroma of which is enhanced by the co-deposition of salts or oxides of alloying metals or other metal elements in the passivation film. Black passivation films were first obtained on zinc-iron and zinc-nickel alloy coatings, followed by black passivation on zinc coatings by the addition of metallic black oxides, metal sulfides or phosphorus derivatives. The process has been