摘要
用电沉积方法在WE43镁合金上制备了羟基磷酸钙(简称HA)膜层,发现这样制备的HA膜层具备双层结构。XRD分析表明,预沉积层的主要成分为磷酸氢钙和羟基磷酸钙,经过热浸处理后最终膜层的主要成分为羟基磷酸钙和氢氧化钙。微观形貌研究表明,磷酸氢钙为片状,羟基磷酸钙为梭形。在类似人体血浆的模拟体液(simulatedbody fluid,SBF)中的极化曲线结果表明,致密的羟基磷酸钙膜层能够有效地提高WE43镁合金的耐腐蚀性能。0.5mol/L的NaOH热浸溶液后处理工序会导致最终膜层中生成少量的Ca(OH)_2。
Two-layer hydroxyapatite film was prepared on WE43 magnesium alloy surface by electrochemical deposition method. XRD results showed that the film consisted of flake-like CaHPO4 · 2H2O and spindle hydroxyapatite after pretreatment, and the film consisted of spindle hydroxyapatite and Ca （OH）2 after hot dip process. Polarization curves showed that the compact hydroxyapatite film could improve the corrosion resistance of WE4a magnesium alloy significantly when immered in simulated body fluid （SBF）. Ca（OH）2 was generated due to the relatively high concentration of hot 0. 5 mol/L NaOH in the solution.
出处
《腐蚀与防护》
CAS
北大核心
2011年第3期182-184,189,共4页
Corrosion & Protection
基金
上海市重点基础研究项目(08JC1421600)
嘉兴市科技领军人才计划项目(No.2008BY7002)
关键词
耐腐蚀性
WE43
羟基磷酸钙
模拟体液
电沉积
corrosion resistance
WE43
hydroxyapatite
simulated body fluid
electrochemical deposition
