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Analytical and Bioanalytical Electrochemistry، جلد ۱۵، شماره ۱۱، صفحات ۹۸۸-۱۰۰۰
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عنوان انگلیسی Influence of current density onto composition and corrosion of electrodeposited Ni–Zn alloys
چکیده انگلیسی مقاله Abstract-The initial corrosion rates of electrodeposited Zn-Ni coating under galvanostatic conditions are closely related to the current density. The NH4Cl 12-14 wt% Ni coating showed better corrosion resistance than those of the other investigated coatings due to the lower Ni content of 9 wt%. Moreover, nodular granules closely packed with capillary fissures, along with the formation of the electrochemically noble γ-Ni5Zn21 phase, were observed at the highest Ni concentration of 10 wt%. The results of electrochemical characterization on the copper substrate showed an extended testing time, indicating a nobler corrosion potential. Additionally, the grain size refines with the presence of NH4Cl, and the increase in cathodic current density can also lead to a decrease in grain size.
The experimental results indicate that Zn-Ni alloy coatings obtained in the presence of NH4Cl exhibit favorable electrochemical properties, demonstrating a protective effect on steel substrates. However, the sacrificial effect is more pronounced when these coatings are applied on copper substrates.
کلیدواژه‌های انگلیسی مقاله electroplating,refines,Microstructure,Electrodeposition,XRD
نویسندگان مقاله Naima Benachour |
Department of Chemistry, Faculty of Science, University of 20 August 1955-Skikda, Algeria

Rana Amiri |
Department of Chemistry, Faculty of Science, University of 20 August 1955-Skikda, Algeria

نشانی اینترنتی https://www.abechem.com/article_709115_e605341a3b2f8bf179eb87afcee9cf4f.pdf
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