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STUDY THE INFLUENCE OF H3BO3ON THE ZINC ELECTROPLATING USING ELECTROCHEMICAL NOISE TECHNIQUE 认领 引用
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作者 Z.Zhang C.S.Wu +4 位作者 Q.Y.Cai Y.L.Cheng F.H.Cao J.Q.Zhang C.N.Cao 《Acta Metallurgica Sinica(English Letters)》 EI CAS 2004年第5期661-666,共6页
The influence of H3BO3 on the zinc electroplating was studied using electrochemical noise technique, cyclic voltammetry and steady-state polarization method. The results showed that, under the experimental conditions,... The influence of H3BO3 on the zinc electroplating was studied using electrochemical noise technique, cyclic voltammetry and steady-state polarization method. The results showed that, under the experimental conditions, the deposition of zinc followed the mechanism of two-dimensional nucleation and subsequent grain growth. The addition of H3BO3 into the electroplating solution prominently changes the nucleation and growth kinetics of zinc deposits, which is directly related to the features of electrocrystallization noise and the corresponding structure of the electrodeposits. The results also shown that the electrochemical noise (EN) technique can give more information about the electrodeposits structure and electroplating mechanism than other normal electrochemical measurements can give, such as steady-state polarization method and cyclic voltammetry technique. 展开更多
关键词 zinc electroplating electrochemical noise electrocrystallization
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ELECTROCHEMICAL NOISE FEATURES OF PURE ALUMINUM DURING PITTING CORROSION IN NEUTRAL NaCl SOLUTION 认领 引用 被引量：2
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作者 F.H.Cao Z.Zhang +4 位作者 Y.L.Cheng J.F.Li J.Q.Zhang J.M.Wang C.N.Cao 《Acta Metallurgica Sinica(English Letters)》 EI CAS 2003年第1期20-30,共11页
Spontaneous electrochemical noise (EN) can be a rich source of information concerning the processes simultaneously occurring at a corroding interface. Potential noise fluctuations during the free corrosion of pure alu... Spontaneous electrochemical noise (EN) can be a rich source of information concerning the processes simultaneously occurring at a corroding interface. Potential noise fluctuations during the free corrosion of pure aluminum in different concentration of neutral sodium chloride solution are investigated, and the breakdown and restoration of passive metal's film are studied using potentiodynamic scanning (PDS) measurements and electrochemical impedance spectroscopy (EIS) technique. Two capacitance loops are observed in the Nyquist plots in two kinds of concentration, and the corrosion process is under activation control at first, then become diffusion control within the oxide film and corrosion products of (Al(OH)p-mCl-m) accumulated on the surface of the corroding electrode. It is suggested that the pitting corrosion is much easier to occur for pure aluminum in 7.0wt% than in 2.0wt% NaCl solution, and the high concentration of chloride ion in solution inhibits the repassivation of a metastable pit. The corrosion rate deterministic step does not involve Cl-. 展开更多
关键词 pure aluminum pitting corrosion electrochemical noise electrochemical impedance spectroscopy potentiodynamic scanning
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