Q235钢表面纳米化的电化学腐蚀行为

Effect of Nano-crystallization on Electrochemical Corrosion Behavior of Q235 Steel

采用表面机械研磨技术(SMAT)使Q235钢实现了表面纳米化,随后分析及比较了Q235钢经不同弹丸直径处理后在0.05 mol/L H2SO4+0.05 mol/L Na2SO4介质中的腐蚀行为。结果表明,除了Q235钢用10 mm弹丸直径处理的SMAT试样腐蚀电流密度变大,耐腐蚀性能下降之外,用其他弹丸直径处理的SMAT试样耐腐蚀性能均有所提高。

The nano-crystalline microstructure on the surface of Q235 steel was induced by surface mechanical attrition treatment （SMAT）. Then, the effects of different SMAT ball diameters on corrosion resistance of Q235 SMAT samples measured in 0.05 mol/L H2SO4＋0.05mol/L Na2SOa solution were investigated. The results show that, except for 10 mm ball diameter SMAT sample, the corrosion current density of Q235 SMAT sample reduces, resulting in an increase in corrosion resistance.