应用电化学动电位扫描和交流阻抗法研究了含H2S的H2SO4溶液中Cl-对铁腐蚀的影响。结果表明，在含H2S的0.5mol/L H2SO4溶液中,Cl-能同时抑制铁腐蚀的阴\阳要反应,且Cl-的抑制作用存在浓度极值现象,极值点为1mol/L;在含H2S的0.005mol/L H2SO4溶液中,铁腐蚀一定时间后表面生成少许腐蚀产物,使铁腐蚀程度降低,少量Cl-可提高腐蚀产物的保护性,但降低其附着力,大量Cl-则阻止腐蚀产物的生成.
The effect of Cl- on iron corrosion in 0.5mol/L and 0.005mol/L H2SO4 solutions containing H2S has been studied by electrochemical potentiodynamic oolarization and impedance measurements.The results show that Cl- ion can simultaneouly inhibit the anodic and cathodic reaction of iron in 0.5mol /L H2SO4 containing H2S. For the inhibition action of Cl- a critical concentration is observed and the critical point is 1mol/L. In 0.005mol/L H2SO4 containing H2S,small amount of Cl- can increase the protective property of the corrosion product on iron surface,but weaken the adhesive force of the corrosion product,however,arge amount of Cl-retard the formation of the corrosion product.
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