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.

摘要

这项工作通过将 HA 颗粒添加到 Ca-P 基电解质溶液中，成功地在纯镁上制备了含羟基磷灰石 (HA) 的自密封微弧氧化 (MAO) 涂层。研究了所得涂层的生物降解行为。HA 颗粒将多孔 MAO 涂层转变为自密封涂层。不同熔点 MAO 涂层成分的存在是一个关键因素。HA 颗粒通过增加涂层的致密性来增加涂层的耐腐蚀性，这抵消了厚度的减少。含有 1 g/L HA 颗粒的 MAO 涂层具有最好的耐腐蚀性。