Improving in vitro corrosion resistance of biomimetic calcium phosphate coatings for Mg substrates using calcium hydroxide layer
Improving in vitro corrosion resistance of biomimetic calcium phosphate coatings for Mg substrates using calcium hydroxide layer
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DOI：
10.1179/1743278212y.0000000018
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发表时间：
2012-08
期刊：
影响因子：
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通讯作者：
Jay L. Waterman;Nick Birbilis;George J. Dias;T. Woodfield;M. Staiger
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文献类型：
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作者：
Jay L. Waterman;Nick Birbilis;George J. Dias;T. Woodfield;M. Staiger
为了提高可生物降解镁合金的耐腐蚀性能，研究了仿生磷酸钙涂层。这些涂层的耐腐蚀性通常受到制造过程中缺陷的限制。因此，如果要将仿生涂层用于防腐，则需要一种改善这些涂层腐蚀反应的方法。在这项研究中，氢氧化钙衬底被用于改善这些仿生涂层的性能。采用析氢和电化学技术对其体外腐蚀响应进行了研究。发现氢氧化钙层提高了涂层的耐蚀性。制备的涂层比未改性的仿生涂层缺陷更少。随着时间的推移，氢氧化钙层也阻止了涂层中的缺陷的生长，从而导致更持久的保护。研究结果表明，氢氧化钙涂层可以显著提高仿生涂层的防腐性能。
Biomimetic calcium phosphate coatings have been studied to improve the corrosion resistance of biodegradable magnesium alloys. The corrosion resistance of these coatings is often limited by defects during creation. A method for improving the corrosion response of these coatings is therefore needed if biomimetic coatings are to be used for corrosion protection. In this study, a calcium hydroxide underlayer was applied to improve the properties of these biomimetic coatings. The in vitro corrosion response was studied using hydrogen evolution and electrochemical techniques. It was found that the calcium hydroxide layer increased the corrosion resistance of the coatings. The coatings created had fewer defects than the unmodified biomimetic coatings. Over time, the calcium hydroxide layer also prevented the defects in the coating from growing, leading to longer lasting protection. The results of this study suggest that calcium hydroxide coatings can significantly improve the corrosion protection of a biomimetic coating.