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首页> 外文期刊>Journal of Applied Electrochemistry >Effect of complexing agents on the electrochemical behaviour of orthopaedic stainless steel in physiological solution
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Effect of complexing agents on the electrochemical behaviour of orthopaedic stainless steel in physiological solution

机译：络合剂对矫形不锈钢在生理溶液中电化学行为的影响

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摘要

This work is aimed at providing a better understanding of the biocompatibility of stainless steel in the human body, where various biomolecules are able to bind metal ions and convey them from the surface of an orthopaedic implant to various parts of the body. The passivation behaviour of orthopaedic stainless steel was studied by potentiodynamic and potentiostatic electrochemical methods in physiological solution as a function of type and concentration of complexing agents added. The latter were used to simulate the complexing effect of biomolecules in vitro. Two complexing agents, EDTA and citrate, were investigated in the concentration range from 0.1 to 100 mM. Their addition induces a pronounced effect on the passivation characteristics of stainless steel. The results were discussed in the context of the formation of soluble complexes of metal ions, which induces an increase in metal dissolution and disturbs the formation of the passive layer. The degree of increased dissolution appears to be related to the stability constants of the complex formed. [References: 36]
机译：这项工作旨在更好地了解不锈钢在人体中的生物相容性，其中各种生物分子能够结合金属离子并将其从整形外科植入物的表面传输到人体的各个部位。通过电位动力学和恒电位电化学方法研究了矫形不锈钢在钝化溶液中的钝化行为，该钝化行为取决于所添加络合剂的类型和浓度。后者被用来模拟生物分子的体外复合作用。研究了两种络合剂，EDTA和柠檬酸盐，浓度范围为0.1至100 mM。它们的添加对不锈钢的钝化特性产生明显的影响。在形成金属离子可溶性络合物的背景下讨论了结果，这会导致金属溶解度增加并干扰钝化层的形成。增加的溶解度似乎与所形成的复合物的稳定性常数有关。 [参考：36]

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