ELECTRODEPOSITION BEHAVIOR OFMnWITHNiIN ACIDIC SULFATE SOLUTIONS

Dan Ji, Xiawen Le, Qingdong Zhong () and Qiongyu Zhou
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Dan Ji: Key Lab of Modern Metallurgy & Materials Processing, Shanghai University, Shanghai 200072, P. R. China
Xiawen Le: Key Lab of Modern Metallurgy & Materials Processing, Shanghai University, Shanghai 200072, P. R. China
Qingdong Zhong: Key Lab of Modern Metallurgy & Materials Processing, Shanghai University, Shanghai 200072, P. R. China
Qiongyu Zhou: Key Lab of Modern Metallurgy & Materials Processing, Shanghai University, Shanghai 200072, P. R. China

Surface Review and Letters (SRL), 2014, vol. 21, issue 06, 1-9

Abstract: The influence ofMn2+/Ni2+mole ratio in electrolytes on theNi–Mnalloy deposits was studied. The electrodeposition mechanism ofMnwithNiis analyzed by the cyclic voltammogram (CV) and an "induced co-deposition" mechanism is proposed forNi–Mnalloy electrodeposition. The results show that theMncontent inNi–Mnalloy deposit and the hardness increased with the increase ofMn2+/Ni2+mole ratio in electrolytes. When theMn2+/Ni2+mole ratio in bath was 2/1, the corrosion current density of the deposit coating was the lowest and the corresponding corrosion potential was higher, and under these conditions the coating with aMncontent of 1.20 wt.% showed good corrosion resistance. The scanning electron microscopy (SEM) of the alloy coatings exhibited that the morphology ofNi–Mnalloy coatings were different from PureNicoating, and whenMn2+/Ni2+was 2/1, the surface was compact and homogeneous.

Keywords: Ni–Mnalloy coatings; electrodeposition mechanism; induced co-deposition; microhardness; corrosion resistance (search for similar items in EconPapers)
Date: 2014
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DOI: 10.1142/S0218625X14500838

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