Corrosion resistance of a novel SnO<sub>2</sub>-doped dicalcium phosphate coating on AZ31 magnesium alloy.

Cui, Lan-Yue; Wei, Guang-Bin; Zeng, Rong-Chang; Li, Shuo-Qi; Zou, Yu-Hong; Han, En-Hou · Bioact Mater · 2018

basic_science · Level V

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Abstract

A SnO<sub>2</sub>-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 SnO<sub>2</sub> nanoparticles. The corrosion current density and hydrogen evolution rate of the coating prepared in presence of SnO<sub>2</sub> were reduced compared to the coating without SnO<sub>2</sub> and the bare AZ31 substrate, indicating an improvement in the corrosion resistance of the SnO<sub>2</sub>-doped coating.