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Influence of the Plating Conditions on the Structure and Corrosion Resistance of the Ni-Mn Alloy

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Abstract:

This paper reported the electrodeposition of the nickel manganese alloy coatings from a sulphate bath using sodium citrate as complexing agent. The cyclic voltammetric experiments showed that the alloy initiative codeposition potential was about –0.457 V (vs.SCE). The effect of the plating conditions on the composition and the structure of the Ni-Mn were studied by energy dispersive X-ray spectrum and X-ray diffractometer, respectively. As a result, with the increase of the cathodic current density from 10 to 40 mA·cm-2, the manganese content of the deposit increased from 4.4 at% to 10.3 at%, and then it slightly decreased. The phase structure of the coating was face centered lattice (Fm3m) Ni-Mn solid solution. The corrosive polarization experiments indicated that the deposit could work as sacrificial coating for carbon steel in 3.5 wt% sodium chloride solution.

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Periodical:

Key Engineering Materials (Volumes 373-374)

Pages:

442-445

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.373-374.442

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Online since:

March 2008

Authors:

Sen Lin Wang, Wei Wei Yu

Keywords:

Coating, Corrosion Resistance, Electro-Deposition, NiMn

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© 2008 Trans Tech Publications Ltd. All Rights Reserved

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