Study on the preparation and corrosion resistance of hydroxyapatite/stearic acid superhydrophobic composite coating on magnesium alloy surface

Magnesium alloys have been widely used as a new medical metal implant material because of their good physicochemical properties, biodegradability and biocompatibility. But magnesium alloys are very chemically active and easily corroded after being implanted in the human body. In this paper, a hydroxyapatite/fatty acid salt superhydrophobic composite film was prepared on the surface of magnesium alloys by hydrothermal method. By testing, the water contact angle of the prepared composite film layer reaches 154.5°, and the corrosion current density is reduced by two orders of magnitude, which effectively improves the corrosion resistance of magnesium alloys. The hydrophobic properties of the prepared superhydrophobic composite membrane show good chemical stability. This preparation method can have good application prospects in industry and medical materials because of its simplicity and efficiency.

Abstract licence: CC BY

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