Hardness and temperature, current density, chromium content of sulfuric acid anhydride and are closely related.
铬层软度与温度、电流密度、铬酐及硫酸的含量都有紧密亲密的干系。
2
By the reduction on industrial Chromic anhydride-methanol, the trivalent chromium main salt was made. The technological formula and standard of Chromium-Nickel alloy electroplating were given.