摘要
利用电化学阻抗谱、极化曲线和Mott-Schottky图研究了十二烷基苯磺酸钠(SDBS)在含硫离子和氯离子的模拟水中对不锈钢电极的缓蚀性能。结果表明,在含硫离子的模拟冷却水中加入SDBS可以使不锈钢电极的阻抗值增大,点蚀电位提高,不锈钢钝化膜的载流子浓度减小,SDBS有效地提高了不锈钢在含硫离子水体中的耐蚀性能。模拟水中氯离子浓度的增加使不锈钢电极的点蚀电位下降,点蚀敏感性增加,加入SDBS后不锈钢电极的点蚀电位提高,甚至出现过钝化,SDBS抑制了模拟水中氯离子对不锈钢的侵蚀。
The corrosion inhibition performance of sodium dodecyl benzene sulfonate （SDBS） to stainless steel in simulated cooling water containing sulfide and chloride ions was investigated by electrochemical impedance spectroscopy, polarization curves and Mott-Schottky approach. The results revealed that in simulated cooling water containing sulfide, the existence of SDBS enlarged the impedance values and raised the pitting potential of stainless steel electrode and decreased the carrier concentration of the passive film, indicating effective corrosion inhibition of SDBS to stainless steel in sulfide containing solution. The pitting potential of stainless steel electrode decreased with the increase of chloride ions in simulated cooling water whereas it shifted towards positive direction after adding SDBS, and evern reached transpasssivation potential, illustrating that corrosion of chlorideions to stainless steel was restrained by adding SDBS in simulated cooling water.
出处
《腐蚀与防护》
CAS
北大核心
2012年第9期740-743,共4页
Corrosion & Protection
基金
上海市重点科技攻关项目(No.08DZ2201400
10DZ2252400
11DZ2210500)
上海市教委科创重点项目(No.12ZZ173)
上海市2010联盟计划资助
关键词
不锈钢
冷却水
十二烷基苯磺酸钠
缓蚀性能
stainless steel
cooling water
SDBS
corrosion inhibition performance
