Electrodeposition and characterization of Zn-Mn coatings for corrosion protection

被引：50
作者：
Ganesan, Selvarani [1 ]
Prabhu, Ganesan [1 ]
Popov, Branko N. [1 ]
机构：
[1] Univ S Carolina, Dept Chem Engn, Ctr Electrochem Engn, Columbia, SC 29208 USA
来源：
SURFACE & COATINGS TECHNOLOGY | 2014年 / 238卷
关键词：
Zn-Mn coatings; Electrodeposition; Acidic chloride bath; Sacrificial coatings; Corrosion protection; SULFATE-CONTAINING MEDIUM; ACIDIC CHLORIDE BATH; ZINC-NICKEL ALLOYS; HYDROGEN PERMEATION; NI-CD; GALVANIC COATINGS; ABILITY; PULSE; DEPOSITION; BEHAVIOR;
D O I：
10.1016/j.surfcoat.2013.10.062
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Zn-Mn alloys were electrodeposited from an acidic chloride bath. The influence of bath composition and deposition parameters on the alloys' composition, cathodic current efficiency and physical and electrochemical properties was studied. It was found that the composition of the plating bath and deposition potential have significant influence on the manganese content, morphology and corrosion property of the Zn-Mn alloys. Data obtained from linear polarization, Tafel analysis and impedance studies revealed higher corrosion resistance for the Zn-Mn alloy deposits when compared to bare Zn deposit. The E-corr vs. time curves for Zn-Mn and Zn showed that the bare Zn deposit reached the steel potential after 40 h while the Zn-Mn reached the steel potential after 30 days. In addition, the results obtained from anodic passivation studies indicated that Zn-Mn alloys possess passivation behavior in NaCl solution. Published by Elsevier B.V.
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页码：143 / 151
页数：9
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