Biodegradation behaviour of hydroxyapatite-containing self-sealing micro-arc-oxidation coating on pure Mg. (3rd July 2021)

• Record Type: Journal Article
• Authors: Zheng, Zhongren; Zhao, Ming-Chun; Tan, Lili; Zhao, Ying-Chao; Xie, Bin; Huang, Lixin; Yin, Dengfeng; Yang, Ke; Atrens, Andrej
• Is Part Of: Surface engineering. Volume 37:Number 7(2021)
• Page Start: 942
• Page End: 952
• Publication Date: 2021-07-03
• Subjects: Magnesium -- MAO coating -- biodegradation -- HA particles; Surfaces (Technology) -- Periodicals; Coatings -- Periodicals; 620.4405
• DOI: 10.1080/02670844.2021.1892290
• Languages: English
• ISSNs: 0267-0844

Abstract

ABSTRACT: This work successfully prepared a hydroxyapatite (HA)-containing self-sealing micro-arc oxidation (MAO) coating on pure Mg by adding HA particles into a Ca–P based electrolyte solution. Biodegradation behaviour of the obtained coatings was studied. The HA particles transformed the porous MAO coating into a self-sealing coating. The presence of different melting point MAO coating constituents was a key factor. HA particles increased the corrosion resistance of the coating by increasing compactness of the coating which counteracted the decrease in thickness. The MAO coating containing 1 g/L HA particles had the best corrosion resistance.