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HomeMaterials Science ForumMaterials Science Forum Vol. 939Investigation on the Anticorrosion Property of the...

Investigation on the Anticorrosion Property of the MnCaP Coating on a Mg-Zn-Ca Alloy

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Abstract:

In order to improve the anticorrosion ability of a Mg-5Zn-1.5Ca alloy used as a bone replacement material, this study prepared the MnCaP conversion coating, which was formed from a phosphating solution mixed with a MnCl₂ solution of 0.05 molarity, on a magnesium (Mg) alloy. After forming a MnCaP conversion coating on a Mg alloy, micro-arc oxidation (MAO) proceeded for improving the anticorrosion ability of the sample. As a result, when the 0.05MnCaP coating on a Mg alloy was immersed in the simulated body fluid (SBF), the corrosion current, pH value change, and hydrogen evolution volume of the SBF solution are lower than a uncoated Mg alloy. From the SEM and EDS analyses for a corroded 0.05MnCaP coating on a Mg alloy, the manganese (Mn) phosphate in a lumpy-rock form and the calcium (Ca) phosphate in a flake form alternate to each other densely, so that the coating can effectively prevent a Mg alloy from corrosion.

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Periodical:

Materials Science Forum (Volume 939)

Pages:

83-88

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.939.83

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Online since:

November 2018

Authors:

Shiuan Ho Chang*, Z.Y. Xu, Li Yuan Niu, Wei Huang, Zhao Xiong Zhao, Dong Nie

Keywords:

Coating, Corrosion, Magnesium Alloy, Phosphate, Simulated Body Fluid (SBF)

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© 2018 Trans Tech Publications Ltd. All Rights Reserved

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* - Corresponding Author

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