通过溶胶-凝胶处理获得的含SiO₂-CaO膜的316L不锈钢的局部腐蚀。

Localized corrosion of 316L stainless steel with SiO2-CaO films obtained by means of sol-gel treatment.

作者信息

Vallet-Regí M, Izquierdo-Barba I, Gil F J

机构信息

Departamento de Química Inorgánica y Bioinorgánica, Facultad de Farmacia, Universidad Complutense de Madrid, 28040 Madrid, Spain.

出版信息

J Biomed Mater Res A. 2003 Nov 1;67(2):674-8. doi: 10.1002/jbm.a.10159.

DOI:10.1002/jbm.a.10159

PMID:14566812

Abstract

Sol-gel films on austenitic stainless steel (AISI 316L) polished wafer were prepared from sono-sols obtained from tetraethylorthosilane and hydrated calcium nitrate. However, pitting was observed in different places on the stainless steel surfaces. The corrosion resistance was evaluated by the polarization resistance in simulated body fluid environment at 37 degrees C. The critical current density, the passive current density, the corrosion potential, and the critical pitting potential were studied. The austenitic stainless steel 316L treated presents important electrochemical corrosion and consequently its application as endosseous implants is not possible.

摘要

在经过抛光的奥氏体不锈钢（AISI 316L）晶圆上的溶胶-凝胶薄膜是由正硅酸乙酯和水合硝酸钙制得的超声溶胶制备而成。然而，在不锈钢表面的不同位置观察到了点蚀现象。通过在37摄氏度的模拟体液环境中的极化电阻来评估耐腐蚀性。研究了临界电流密度、钝态电流密度、腐蚀电位和临界点蚀电位。经处理的奥氏体不锈钢316L呈现出严重的电化学腐蚀，因此其作为骨内植入物的应用是不可能的。