热处理对纯镁及AZ31合金腐蚀行为的影响
Influence of Heat Treatment on the Corrosion Behavior of Purified Magnesium and AZ31 Alloy
摘要：
镁及其合金由于其生物相容性和低应力屏蔽性，是可生物降解植入物的理想选择。然而，它们在生物环境中会腐蚀得太快。研究了高纯镁和AZ 31镁合金在37°C模拟体液中的热处理工艺。在不同的温度和时间下进行热处理。采用析氢、失重、PDP和EIS方法测量腐蚀速率。结果表明，热处理可使HP-Mg的耐蚀性提高2倍，AZ 31的耐蚀性提高10倍。
英文摘要：
Magnesium and its alloys are ideal for biodegradable implants due to their biocompatibility and their low-stress shielding. However, they can corrode too rapidly in the biological environment. The objective of this research was to develop heat treatments to slow the corrosion of high purified magnesium and AZ31 alloy in simulated body fluid at 37°C. Heat treatments were performed at different temperatures and times. Hydrogen evolution, weight loss, PDP, and EIS methods were used to measure the corrosion rates. Results show that heat treating can increase the corrosion resistance of HP-Mg by 2x and AZ31 by 10x.
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