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首页> 外文期刊>Journal of biomedical materials research. Part B, Applied biomaterials. >Galvanic corrosion of nitinol under deaerated and aerated conditions
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Galvanic corrosion of nitinol under deaerated and aerated conditions

机译：镍钛合金在脱气和充气条件下的电偶腐蚀

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Various studies have examined the corrosion rate of nitinol generally under deaerated conditions. Likewise, galvanic corrosion studies have typically involved deaerated solutions. This work addressed the effect of galvanic coupling on the corrosion current of electropolished nitinol in phosphate buffered saline and 0.9% sodium chloride under dearated and aerated conditions for times up to 24 h. Tests were performed on nitinol alone and coupled with MP35N in both the mechanically polished and passivated conditions. Aeration and galvanic coupling were found to have relatively little effect, indicating that the corrosion current is controlled by the anodic reaction. The current can be attributed entirely to Ni2+ dissolution, which appears to be governed by solid-state mass transport of Ni2+ through the passive oxide film. Because corrosion of EP nitinol is controlled by the anodic reaction, contact between EP nitinol and MP35N or other biomedical Co-Cr alloys is unlikely to result in significant galvanic effects in vivo. (c) 2015 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 104B: 1322-1327, 2016.
机译：各种研究通常在脱气条件下研究了镍钛诺的腐蚀速率。同样，电腐蚀研究通常涉及脱气溶液。这项工作解决了在脱气和充气条件下长达24小时的电流耦合对磷酸盐缓冲盐水和0.9％氯化钠中电抛光镍钛合金腐蚀电流的影响。在机械抛光和钝化条件下，单独对镍钛诺进行测试，并与MP35N结合使用。发现曝气和电流耦合的影响相对较小，表明腐蚀电流受阳极反应控制。电流可以完全归因于Ni2 +的溶解，这似乎是由Ni2 +通过无源氧化膜的固态传质控制的。由于EP镍钛合金的腐蚀是通过阳极反应控制的，因此EP镍钛合金与MP35N或其他生物医学Co-Cr合金之间的接触不太可能在体内产生明显的电流效应。 （c）2015 Wiley Periodicals，Inc. J Biomed Mater Res B部分：Appl Biomater，104B：1322-1327，2016。

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