Williams R L, Brown S A, Merritt K
University of California, Davis, CA 95616.
Biomaterials. 1988 Mar;9(2):181-6. doi: 10.1016/0142-9612(88)90119-6.
The effect of proteins on corrosion rates of 316L stainless steel, commercially pure titanium and titanium 6-aluminium 4-vanadium was studied in the static and fretting modes. The static mode was studied using cylindrical specimens as per ASTM F-746, and static fracture fixation plates. The fretting mode was studied using a two-hole plate fretting machine which caused a cyclic rocking motion between the plate and the screws, as per ASTM F-897. Electrochemical techniques of polarization resistance and Tafel slope measurements were used to study effects of proteins on the anodic and cathodic corrosion reactions. It was found that proteins increased the corrosion rate of the stainless steel and C.P. titanium cylindrical specimens, but did not have an effect on the Ti-6AI-4V cylinders. In the fretting mode proteins decreased the corrosion rate of the stainless steel plates, but did not have an appreciable effect on either of the titanium alloys. The presence of proteins appeared to cause an increase in the anodic Tafel constant and a decrease in the cathodic Tafel constant of stainless steel specimens. Significant differences in the shapes of the cathodic Tafel slopes were also seen with cylinders with different surface conditions, and static versus fretting plates.
研究了蛋白质在静态和微动模式下对316L不锈钢、工业纯钛和钛6铝4钒腐蚀速率的影响。静态模式下，按照ASTM F - 746使用圆柱形试样以及静态骨折固定板进行研究。微动模式下，按照ASTM F - 897使用双孔板微动试验机，该试验机在板和螺钉之间引起循环摇摆运动。采用极化电阻和塔菲尔斜率测量的电化学技术研究蛋白质对阳极和阴极腐蚀反应的影响。结果发现，蛋白质提高了不锈钢和工业纯钛圆柱形试样的腐蚀速率，但对Ti - 6Al - 4V圆柱体没有影响。在微动模式下，蛋白质降低了不锈钢板的腐蚀速率，但对两种钛合金均无明显影响。蛋白质的存在似乎导致不锈钢试样的阳极塔菲尔常数增加，阴极塔菲尔常数降低。在具有不同表面条件的圆柱体以及静态与微动板之间，阴极塔菲尔斜率的形状也存在显著差异。
