活塞环松孔镀铬工艺的探讨

The study on the crackle Cr-plating processing of piston ring

本文给出了活塞环松孔镀铬的工艺条件，讨论了电镀液各组分和电镀艺参数对镀铬层机械性能的影响。在铬酐（CrO3）80～220g／L，硫酸（H2SO4）0．8-2．2g／L，三价铬（Cr^3＋）3～7g／L的镀铬液中，操作温度58～60℃，温差控制在±1℃内，电流密度为37～52A／dm^2，得到的镀铬层光亮，硬度高，可使活塞环达到理想的质量要求。

The process formula of crackle Cr-plating was summarized in the paper. The influences of chromeplate solutin＇s chemical compositions and processing parameters on the Cr-plate＇s mechanical properties were studied. The production practice proved that under the condition of 80-220g/1 of CrO3, 0.8-2.2g/1 of H2SO4, 3-7g/1 of Cr^3＋ , processing temperature range 59 ＋ 1℃ , 37- 52A/ dm^2 of cathode density,the deposits obtained had good brightness and high hardness.