首先利用表面机械研磨技术(SMAT)使低碳钢实现了表面纳米化,然后通过金相显微镜、X射线衍射仪对SMAT后低碳钢的微观组织结构进行表征,最后通过 CS350型电化学工作站测试系统对试样进行测试,分析及比较了低碳钢及其 SMAT 试样在0．05 mol/L H2 SO4＋0．05 mol/L Na2 SO4介质中的腐蚀行为.实验表明,在 SMAT 之后,20号钢的耐腐蚀性能好于10号钢,而这恰恰与粗晶状态下10号钢的耐腐蚀性能好于20号钢的结果相反,其原因值得探究.
The nanocrystalline microstructure in the surface of low carbon steel induced by surface mechanical at-trition treatment (SMAT)has been characterized by means of optical microscopy (OM)and X-ray diffractome-try (XRD).Then,the effects of SMAT on corrosion resistance of low carbon steel measured in 0.05 mol/L H2 SO4+0.05 mol/L Na2 SO4 solution have been investigated.The results showed that steel 20 SMAT sample has better corrosion resistance than steel 10 SMAT sample.It was thought-provoking that the results have been in contrast to the corrosion results in coarse grain state.
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