碳钢-磷酸体系中聚天冬氨酸的缓蚀性能及协同缓蚀作用  

Corrosion Inhibition Ability and Its Synergistic Effect of PASP on Carbon Steel in Phosphoric Acid Solution

作　　者：仵茜[1] 王海平[1] 陈丽[2] 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,河北石家庄050016 [2]军械工程学院三系,河北石家庄050003

出　　处：《河北师范大学学报（自然科学版）》2009年第3期344-346,共3页Journal of Hebei Normal University：Natural Science

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);河北师范大学科研基金(L2004Y05)

摘　　要：采用电化学方法测试了质量分数为20%磷酸溶液中聚天冬氨酸(PASP)对碳钢的缓蚀性能和协同缓蚀效果,结果表明:在20℃下,缓蚀效率随PASP添加质量浓度的增加而迅速增加.当PASP质量浓度为1.0 g/L时,缓蚀率达到76.65%;当PASP与十二烷基硫酸钠各以0.25 g/L进行复配时,其缓蚀效率可达到78.66%,比单独使用时缓蚀效率明显增大,具有正协同效应.在实验体系中PASP是一种以抑制阳极为主的缓蚀剂.By using potentiodynamic polarization method, the current study reveals the corrosion inhibition ability of polyaspartic acid（PASP） on carbon Steel in 20 % phosphoric acid solution. The results show that the inhibition efficiency of PASP increase significantly at 20℃with the increasing of PASP concentration. The inhibitor efficiency η reaches as high as 76.65 % with the PASP concentration of 1.0 g/L. In PASP-SDS system, the maximum inhibition efficiency is found to be 78.66 % when combining PASP and SDS at the same concentration of 0.25 g/L; which indicates a positive synergistic effect. This work also proves that the anode inhibition reaction contributes most to the inhibitive effect of PASP.

关 键 词：聚天冬氨酸 十二烷基硫酸钠 碳钢 协同效应 

分 类 号：O646[理学—物理化学]