Authors
University of Tehran, College of Engineering, School of Metallurgy and Materials Engineering, Tehran , Iran
Abstract
Zinc-Tin alloy coatings have many applications because of their unique properties such as corrosion resistance, solder ability, and flexibility. In this study, the effect of current density and temperature on the cathodic current and structures of the coatings was investigated. Structure of the coatings obtained was evaluated via Scanning Electron Microscope (SEM) equipped with Energy Dispersive Analysis (EDS). The experimental results showed that increasing the current density to 4 mA/cm2, result in decreasing the particle size and increasing the cathodic current efficiency. Then, by incrementing the current density to 10 mA/cm2, the reduction of the cathodic current efficiency was observed also with incrementing temperature the coating morphology became coarser grains and the content of zinc decreased. The result of hardness testing revealed that increasing zinc ion to the 72 wt.% Zinc-tin alloy coating has the highest value of hardness.
Keywords
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