| 摘要 |
Disclosed is a multimetal phosphating process which comprises the following steps:
a) immersion of the metal part to be treated in an activating bath containing titanium polyphosphates and organic nitro compounds deriving from nitroguanidine;
b) transfer of the metal part from the activation bath to a phosphating bath containing zinc, manganese, P2O5, chlorates, fluorosilicates and hydrogen peroxide. |
