采用动态极化曲线和电化学阻抗谱方法研究了经过柠檬酸钝化后医用316L不锈钢在模拟体液中耐蚀性能的变化,利用XPS分析了材料表面组成对不锈钢耐蚀性能的影响.结果表明,经过柠檬酸钝化后,316L不锈钢的自腐蚀电位增加,自腐蚀电流减小,而极化电阻和电荷转移电阻增大,说明其耐蚀性得到了很大的提高.经过柠檬酸钝化的316L不锈钢耐蚀性提高的原因是柠檬酸选择性地溶解基体Fe元素,而双氧水将富集的Cr氧化形成致密的Cr2O3薄膜,从而起到保护作用.
参考文献
| [1] | Mani G,Feldman M D,Patel D,et al.Coronary stents:a materials perspective[J].Biomaterials,2007,28(9):1689 |
| [2] | Shahryari A,Azari F,Vali H,et al.The response of fibrinogen,platelets,endothelial and smooth muscle cells to an electrochemically modified SS316LS surface:towards the enhanced biocompatibility of coronary stents[J].Acta Biomater.,2010,6(2):695 |
| [3] | Williams D F.On the mechanisms of biocompatibility[J].Biomaterials,2008,29(20):2941 |
| [4] | Conradi M,Sch(o)n P M,Kocijan A,et al.Surface analysis of localized corrosion of austenitic 316L and duplex 2205 stainless steels in simulated body solutions[J].Mater.Chem.Phys.,2011,130(1-2):708 |
| [5] | Shih C C,Shih C M,Su Y Y,et al.Effect of surface oxide properties on corrosion resistance of 316L stainless steel for biomedical applications[J].Corros.Sci.,2004,46(2):427 |
| [6] | Asami K,Hashimoto K,Shimodaira S.XPS determination of compositions of alloy surfaces and surface oxides on mechanically polished iron-chromium alloys[J].Corros.Sci.,1977,17(9):713 |
| [7] | Ibrahim M A M,Abd-E1 R S,Hamza M.Corrosion behavior of some austenitic stainless steels in chloride environments[J].Mater.Chem.Phys.,2009,115(1):80 |
| [8] | Shahryari A,Omanovic S,Szpunar J A.Electrochemical formation of highly pitting resistant passive films on a biomedical grade 316LVM stainless steel surface[J].Mater.Sci.Eng.,2008,C28(1):94 |
| [9] | 马李洋,丁毅,马立群等.316L不锈钢柠檬酸钝化工艺及其耐点蚀性能研究[J].表面技术,2007,36(2):39 |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%