通过正交试验和单因素试验研究了不锈钢电化学抛光及着色工艺.结果表明,在用14 g CrO3、30 ml C3H8O3、90 ml H3PO4、60 ml H2SO4和20 ml H2O配制的抛光液中,控制温度约80 ℃、电流密度约15 A/dm2,对不锈钢试片电化学抛光约10 min,其光亮度可达1级;在用21 g CrO3、60 ml H2SO4和100 ml H2O配制的着色液中,控制电流密度约0.60 A/dm2、温度70 ℃,对不锈钢电化学着色约3 min,其金黄色着色膜美观均匀、与基体结合力强、耐磨、耐腐蚀、耐高温.此工艺具有设备简单、可控性好、效率高、重现性好等优点.

Some conditions of electrochemical polishing and coloring of stainless steel surface were studied using orthogonal test and single factor test.At about 80 ℃,anodic polishing was done with 0.60 A/dm2 current density for around 10 min in the solution made of 14 g CrO3,30 ml C3H8O3,90 ml H3PO4,60 ml H2SO4 and 20 ml H2O,and then the brightness of stainless steel pieces reached the first grade.At the temperatures between 55 and 70 ℃,the coloring procedure was carried out with about 0.60 A/dm2 current density for 3 min in the electrolyte solution composed of 21 g CrO3,60 ml H2SO4 and 100 ml H2O,and then the golden film was formed on stainless steel pieces.The color film is beautiful and uniform,the binding force with the substrate is fine,the resistance to abrasion,corrosion and high temperature oxidation are good.The advantages of the process are simple,manageable,efficient,repetitive,etc.