电镀工艺流程（Electroplating process）.doc

电镀工艺流程（Electroplating process） Electroplating process Gavrila M. et al reported in neutral aqueous solution, with different deposition conditions (bath composition, current density, flow and passivation) in the electrochemical behavior of low alloy electroplating on anodic type Zn-Ni alloy coating. The stability of the coating was studied by the open circuit potential ~ time curve. The corrosion rate of the coating was evaluated by polarization resistance measurement and voltammetry curve. The influence of the porous structure of the coating on the substrate was simulated by Evans diagram. Passivation can improve the corrosion resistance of the coating, but the passivation time (continuous impregnation time) is too long, which will deteriorate the performance of the passive film. In the corrosion process, due to the formation of zinc hydroxide corrosion barrier layer can reduce the corrosion of metal corrosion, but a long time, specimen surface cracks due to [21]. stress Electroplating Zn-Fe alloy for electroplating Zn-Fe alloy recently, mainly for various systems for process research, in addition, for electroplating Zn-Fe-P three alloy has also been reported. Li Xiangwen et al studied pyrophosphate system of Zn Fe alloy plating process, by adding alcohols and amines and their derivatives were synthesized by the stabilizer, the bright coating (has an anti silver decorative effect of silver white, compact, good corrosion resistance), [22, 23]. Ceng Xiangde has reported the influence factors of Chloride Zn Fe alloy plating process stability, that pH value is the key factor, which must be controlled in the range of process regulations, therefore, need to control and reduce the anode current density, using Hull test, cyclic voltammetry and other methods for hydrogen evolution [24]. Chen Guoliang et al., studied the process of electroplating Zn-Fe alloy sulfate system brightener, the brightener has high brightness and high cloud characteristics, can make the coating cont