Journal of Advanced Materials and Technologies

Journal of Advanced Materials and Technologies

Effect of Coating Processes Parameters on Structure and Micro Hardness of Zn-Sn Alloy Coating Via Electroplating

Authors
Saeid Akbarzadeh
Saeid Reza Allahkaram
Hasan Farhangi
University of Tehran, College of Engineering, School of Metallurgy and Materials Engineering, Tehran , Iran
10.30501/jamt.2636.70294
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
Zinc-Tin electroplating
cathodic current efficiency
micro hardness
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Journal of Advanced Materials and Technologies
Volume 4, Issue 2
Summer 2015
Pages 1-9

  • Receive Date 17 November 2014
  • Revise Date 27 June 2015
  • Accept Date 05 September 2015