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用深度轧制方法获得了块体纳米304不锈钢材料.通过动电位极化曲线和Mott-Schottky分析等电化学测试手段,探讨了轧制纳米块体304不锈钢与普通304不锈钢(304ss)在0.05 mol/L H2SO4+0.05 mol/L NaCl溶液中钝化膜的耐Cl-侵蚀性能.研究表明,深度轧制使304不锈钢组织内部形成高密度纳米尺度孪晶;纳米化表面可以形成致密的钝化膜,使其耐Cl-侵蚀能力提高.对钝化膜半导体性能分析结果表明,轧制纳米块体不锈钢钝化膜中的载流子密度有所下降,这在一定程度上抑制了钝化膜的电化学反应历程,从而进一步提高了钝化膜的化学稳定性.
The bulk nanostructured 304 stainless steel was obtained by deep rolling method. The effects of kinetic polarization curve and Mott-Schottky analysis on the electrochemical properties of 304N stainless steel and 304 304 stainless steel / L H2SO4 + 0.05 mol / L NaCl solution. The results show that the deep rolling causes the formation of high density nanoscale twins in the interior of the 304 stainless steel. The nanocrystallization surface can form dense passivation film , So that its resistance to Cl-erosion increased.Analysis of the performance of the passivation film semiconductor performance, the passivation density of the passive film of the nano-block stainless steel rolling has decreased, which to some extent inhibited the passivation film Electrochemical reaction process, thus further improving the chemical stability of passive film.