Na2MoO4和EDTA在HCl溶液中对冷轧钢的缓蚀协同效应
SYNERGISTIC INHIBITION EFFECT OF Na2MoO4 AND EDTA ON CORROSION OF COLD ROLLED STEEL IN HCl SOLUTION
摘 要
用失重法和电化学法研究了在0.5 mol/L HCl中Na2MoO4和EDTA对冷轧钢的缓蚀协同作用.研究结果表明,单独的Na2MoO4和EDTA对冷轧钢具有一定的缓蚀作用,为阳极型缓蚀剂,且在钢表面的吸附符合Temkin吸附模型.当两者复配后产生了明显的缓蚀协同效应,为一抑制阳极为主的混合抑制型缓蚀剂,并讨论了产生缓蚀协同效应的原因.
盐酸
钼酸钠
EDTA
缓蚀协同效应
吸附
Steel
HCl
Na2MoO4
EDTA
Synergism inhibition
Adsorption
Abstract
The synergistic inhibition effect of Na2MoO4 and EDTA on the corrosion of cold rolled steel in HCl solution was investigated by weight loss and polarization curves methods.Both Na2MoO4 and EDTA had moderate inhibitive effect on the corrosion,and acted as anodic type inhibitor for the cold rolled steel.The adsorption of Na2MoO4 and EDTA on the steel surface accorded with the Temkin adsorption isotherm.Incorporation of Na2MoO4 and EDTA significantly improved the inhibition performance.Polarization curves showed that the complex of Na2MoO4 with EDTA acted as a mixed type of inhibitor,mainly inhibiting the anodic reaction.The synergistic inhibition mechanism was discussed.
中图分类号 TG174.42
所属栏目 试验研究
基金项目 国家自然科学基金资助项目(50261004);云南省教育厅基金(06Y073A)
收稿日期 2006/11/30
修改稿日期
网络出版日期
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引用该论文: BAI Wei,LI Xiang-hong,QU Qing,JIANG Shu-an,LIANG Xue-jun,MU Guan-nan. SYNERGISTIC INHIBITION EFFECT OF Na2MoO4 AND EDTA ON CORROSION OF COLD ROLLED STEEL IN HCl SOLUTION[J]. Corrosion & Protection, 2007, 28(9): 449～451
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参考文献
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