Clarification of Dynamic Corrosion Behavior and Electrochemical Approach to Corrosive Wear Mechanism

我们已经调查了在滑动条件下的腐蚀行为。这种状况被称为动态腐蚀，因为表面上有很强的滑动摩擦，新鲜表面不断暴露，而腐蚀行为与正常腐蚀明显不同，I. e。static corrosion. electrochemical approach对understand the corrosive or electrochemical factor contributing corrosive wear非常有效。However， corrosive factor是由暴露于新鲜表面的产品的区域和新鲜表面的corrosion current密度确定的。不幸的是，两个参数都是未知的。我们认为，由于潜在的脉冲法，当前的失真密度被估计为当前的密度。（PP方法）：穿实验在Na-D22-D2-D2-D2-D2-D2-D2溶液用于SUS 304不锈钢，纯铁，纯铜， 6-4铜管，纯铝合金和氧化锆合金（zircaloy-4）在没有潜力和有控制的潜力下，这种评估方法对SUS 304在回收滑动下的corositive wear非常有用，连续的滑动和滑动测试。在这种情况下，异源区（新鲜表面区）与磨损疤痕区相等，化学因子对纯铝和钛-4的磨损不起作用。在机械服装的地方，在PP方法的极化曲线中发现了天主教潜力，由服装管理。However，从滑动和饱和的开始，潜在的下降开始，在这项研究中，异常区域被假定为计划中的磨损疤痕区域，真正的磨损疤痕区域被假定为表面粗糙度和赫兹接触区域。如果新鲜表面上的当前失真密度是从PP方法中获得的，那么在滑动期间的接触区域将被估计。但这还没有被澄清，动态腐蚀的定性性质，因此，在这项研究中得到了澄清，即使定量性质也不充分。

We have investigated the corrosion behavior under sliding condition. Such condition is referred as dynamic corrosion, because on the surface suffered sliding friction fresh surface is exposed continuously and the corrosion behavior is quite different from ordinal corrosion, I.e., static corrosion.The electrochemical approach is very effective to understand the corrosive or electrochemical factor contributing corrosive wear. However, corrosive factor is determined by the product of area of the fresh surface exposed and corrosion current density of the fresh surface. Unfortunately both parameters are unknown. We assumed that the corrosion current density was estimated from the current density obtained by potential pulse method (PP method) .Wear experiment was carried out in NaィイD22ィエD2SOィイD24ィエD2 solution for SUS304 stainless steel, pure iron, pure copper, 6-4 Brass, pure aluminum and zirconium alloy (zircaloy-4) under free potential and controlled potentials.This evaluation method was quite good for corrosive wear of SUS304 under reciprocating sliding, continuous sliding and scratch test. In this case the anodic area (fresh surface area) is equivalent to the wear scar area.Chemical factor is not severe for wear of pure aluminum and zircaloy-4., where the mechanical wear, obtained at cathodic potential in the polarization curve from PP method, governed the wear. However, the steep potential drop occurs with the start of sliding and saturated soon.In this research the anodic area was assumed as the projected wear scar area, the real wear scar area considered the surface roughness, Hertzian contact area. If corrosion current density at the fresh surface is obtained from the PP method, the contact area during sliding would be estimated. This has not been cleared yet.Qualitative property of dynamic corrosion, therefore, is cleared in this research, even though the quantitative property is not sufficient.