各种因素对不锈钢化学着色的影响

Various Factors Influencing the Colourng of Stainless Steel

本文对影响在热的CrO_3-H_2So_4溶液中不锈钢表面颜色变化的因素进行了实验.结果表明:增大CrO_3、H_2SO_4的浓度,升高着色液的温度,添加Mn(2+)都能缩短不锈钢的始着色时间;延长着色时间,将使其表面呈现灰色-蓝色-黄色-红色;添加MoO-_4离子能提高着色膜的光泽;而添加Cl^-、F^-和Cu^(2+)离子对不锈钢的着色影响不大.

The result of experiments carried out in a heated CrO_3-H_2SO_4 solution indicated that initial colouring period can be shortenedi by increasing concentration of CrO_3 and H_2SO_4, raising temperature of the solution or adding Mn^(2+) to the bath. Film colour changes from grey, blue, yellow to red in steps as the immersion period is prolonged. Brightness of film is increased by adding MOO_4^-, but no effects on colouring are shown when adding Cl^-, F^- or Cu^(2+).