Journal
SURFACE & COATINGS TECHNOLOGY
Volume 205, Issue 1, Pages 139-145Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2010.06.012
Keywords
Mg alloy; Trivalent Cr electrodeposition; Wear resistance; Corrosion resistance
Funding
- National Science Council of Republic of China (Taiwan) [NSC 97-2221-E-182-007]
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Mg alloy, AZ91D, which has a two-phase structure, was successfully electroplated in an alkaline Cu-plating bath. The Cu-coated Mg alloy specimen was further electroplated in eco-friendly acidic Cu and then trivalent Cr baths to obtain an anti-wear and anti-corrosion Cr/Cu coating. Experimental results show that the wear and corrosion resistance of the Mg alloy specimen was considerably improved by trivalent Cr electrodeposition. The hardness of the as-plated Cr deposit was drastically increased by using reduction-flame heating for 0.5 s. The above-mentioned results were measured via bonding strength, hardness, wear and corrosion tests. A superior wear and corrosion resistance was obtained when a Cu-coated Mg alloy specimen was electroplated with a trivalent Cr deposit, followed by heating with reduction-flame heating for 0.5 s. (C) 2010 Elsevier B.V. All rights reserved.
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