摘要
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／ＬＨ２ＳＯ４溶液中，Ｃｌ－能同时抑制铁腐蚀的阴、阳极反应，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／ＬＨ２ＳＯ４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 hasbeen studied by electrochemical potentiodynamic polarization and impedance measurements. The resultsshow that Cl-ion can simultaneouly inhibit the anodic and cathodic reaction of iron in 0.5mol/L H2SO4containing H2S. For the inhibition action of Cl- a critical concentration is observed and the critical point is1mol/L. In 0.005mol/L H2SO4 containing H2S, small amount of Cl- can increase the protective propertyof the corrosion product on iron surface, but weaken the adhesive force of the corrosion product, however,large amount of Cl- retard the formation of the corrosion product.
出处
《中国腐蚀与防护学报》
CAS
CSCD
1999年第2期79-84,共6页
Journal of Chinese Society For Corrosion and Protection
基金
国家自然科学基金
中国科学院"百人计划"资助
关键词
氯离子
硫化氢
铁
腐蚀
腐蚀产物
Cl-, H2S, Iron corrosion, Corrosion products
