Corrosion resistance of a novel SnO2-doped dicalcium phosphate coating on AZ31 magnesium alloy

Lan-Yue Cui; Guang-Bin Wei; Rong-Chang Zeng; Shuo-Qi Li; Yu-Hong Zou; En-Hou Han

doi:10.1016/j.bioactmat.2017.11.001

Corrosion resistance of a novel SnO₂-doped dicalcium phosphate coating on AZ31 magnesium alloy

Bioact Mater. 2017 Nov 20;3(3):245-249. doi: 10.1016/j.bioactmat.2017.11.001. eCollection 2018 Sep.

Authors

Lan-Yue Cui¹, Guang-Bin Wei¹, Rong-Chang Zeng¹, Shuo-Qi Li¹, Yu-Hong Zou², En-Hou Han³

Affiliations

¹ College of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao, 266590, China.
² College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590, China.
³ National Engineering Centre for Corrosion Control, Institute of Metals Research, Chinese Academy of Sciences, Shenyang, 110016, China.

Abstract

A SnO₂-doped dicalcium phosphate coating was prepared on AZ31 alloy by means of hydrothermal deposition. The results showed that the coating possessed a globular morphology with a long lamellar crystalline structure and a thickness of approximately 40 μm. The surface of the coating became smooth with an increase additive amount of the SnO₂ nanoparticles. The corrosion current density and hydrogen evolution rate of the coating prepared in presence of SnO₂ were reduced compared to the coating without SnO₂ and the bare AZ31 substrate, indicating an improvement in the corrosion resistance of the SnO₂-doped coating.

Keywords: Biomaterials; Corrosion; Magnesium alloys; Phosphate coating; Stannic oxide.