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

作　　者：何蕊[1] 谷宁[1] 李春梅[1] 

机构地区：[1]河北师范大学化学与材料科学学院,石家庄050016

出　　处：《腐蚀与防护》2010年第6期428-430,共3页Corrosion & Protection

基　　金：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

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EQUIVCRT软件拟合的等效电路为R(RC)((RW)Q)。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.

关 键 词：缓蚀 碳钢 聚天冬氨酸(PASP) 硝酸 

分 类 号：TG174.42[金属学及工艺—金属表面处理]