ELECTROCHEMICAL NOISE ANALYSIS OF THE INFLUENCE OF THE Zn2+ IONS CONCENTRATION ON ZINC ELECTROPLATING

金属学报(英文版), 2005, 18(2): 137-144.

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1.Department of Chemistry, Zhejiang University, Hangzhou 310027, China

2.Department of Chemistry, Zhejiang University, Hangzhou 310027, China

3.Department of Chemistry, Zhejiang University, Hangzhou 310027, China

4.Department of Chemistry, Zhejiang University, Hangzhou 310027, China

5.Department of Chemistry, Zhejiang University, Hangzhou 310027, China;State Key Laboratory for Corrosion and Protection, Institute of Metal Research, The Chinese Academy of Sciences, Shenyang 110016, China

基金项目: 国家自然科学基金(20203015 , 50499335)

ELECTROCHEMICAL NOISE ANALYSIS OF THE INFLUENCE OF THE Zn2+ IONS CONCENTRATION ON ZINC ELECTROPLATING

Keywords： zinc electroplating

The influence of the concentration of Zn2+ ions on zinc electroplating process was investigated by means of electrochemical noise (EN) and cyclic voltammetry methods in conjunction with the scanning electron microscopy (SEM) technique. It was found that the EN generated during the electroplating of dentritic or large polymeric zinc deposit has large potential oscillation amplitude and positive potential drift while the compact zinc deposit possesses small noise amplitude and little potential drifi. With the change of rate determining step from diffusion-control through mixed-control to activation-control, the maximum relative energy obtained from wavelet analysis defined from the region with larger scales to those with smaller scales, and the EDP (relative energy distribution plot) can be us, as 'fingerprints" of EN to characterize the electroplating process and the deposit structure. The results also showed that electrochemical noise technique can give more information about the electrodeposit structure than other normal electrochemical measurements, such as linear potential sweep method and cyclic voltammetry technique.

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ELECTROCHEMICAL NOISE ANALYSIS OF THE INFLUENCE OF THE Zn2+ IONS CONCENTRATION ON ZINC ELECTROPLATING

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