chromic acid

常见例句

Zinc plating chromic acid salt after the passivation, corrosion resistance can improve 6 to 8 times.
锌镀层经铬酸盐钝化之后，耐蚀性可提高6～8倍。
Twice technology reforms and the structure of main equipment for the recovery of chromic acid sludge by phosphoric acid method are described.
介绍该厂铬盐车间利用磷酸法对铬酸渣回收利用的两次技术改造及主要设备的结构，以供同行业厂家参考。
After plating, the Cu and Ni layer could be removed by di- pplng in nitric acid plus ammonium nitrate solution or nitric and chromic acid solution.
这样在电镀后再在硝酸和硝酸铵溶液中或在硝酸和铬酸溶液中退除铜镍镀层，由于铬层不受侵蚀，仍能维持不变。