电化学法研究硝酸体系中聚天冬氨酸对碳钢的缓蚀作用
Inhibition Effect of PASP on Carbon Steel in Nitric Acid Solution Evaluated by Electrochemistry Methods
摘 要
利用极化曲线和电化学阻抗法研究了0.1 mol/L硝酸溶液中聚天冬氨酸(PASP)对碳钢的缓蚀作用.结果表明,20 ℃时,在试验范围内,随着PASP浓度增大缓蚀效率增大,当体系中添加0.5 g/L PASP时,缓蚀效率达到85.3%,聚天冬氨酸对碳钢是以抑制阴极反应为主的混合型缓蚀剂;根据电化学阻抗数据,利用EQU IVCRT软件拟合的等效电路为R(RC)((RW)Q).
碳钢
聚天冬氨酸(PASP)
硝酸
inhibition
carbon steel
polyaspartic acid(PASP)
nitric acid
Abstract
Corrosion inhibition performane of polyaspartic acid (PASP) for carbon steel in 0.1 mol/L nitric acid solution was studied by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS).The results showed that the inhibition efficiency increased with increasing PASP concentration at 20℃.When PASP concentration was 0.5 g/L,the inhibition efficiency was 85.3%.The PASP is a mixed type inhibitor which restrains cathodic reaction.Equivalent circuit was obtained as R(RC)((RW)Q) by EQU from electrochemical impedance data．
中图分类号 TG174.42
所属栏目 试验研究
基金项目 河北省自然科学基金(B2006000131);河北省教育厅科学研究基金(200502022)资助
收稿日期 2009/7/22
修改稿日期 2009/8/26
网络出版日期
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备注谷宁,教授.
引用该论文: HE Rui,GU Ning,LI Chun-mei. Inhibition Effect of PASP on Carbon Steel in Nitric Acid Solution Evaluated by Electrochemistry Methods[J]. Corrosion & Protection, 2010, 31(6): 428～430
被引情况:
【1】何蕊,杜盼盼,李春梅,谷宁, "聚天冬氨酸与三聚氰胺复配对铜的协同缓蚀机理",腐蚀与防护 33, 761-764(2012)
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