淀粉接枝共聚物对Zn的缓蚀性能  

Inhibition for Zn Corrosion by Starch Grafted Copolymer

作　　者：王亚婷 王棵旭 高鹏翔 刘冉[1] 赵地顺[1] 翟建华[1] 屈冠伟 WANG Yating;WANG Kexu;GAO Pengxiang;LIU Ran;ZHAO Dishun;ZHAI Jianhua;QU Guanwei(College of Chemical and Pharmaceutical Engineering,Hebei University of Science and Technology Shijiazhuang 050000,China;Hebei Aohuan Adhesive Products Co.,Ltd.,Baoding 071000,China)

机构地区：[1]河北科技大学化学与制药工程学院,石家庄050000 [2]河北奥环胶粘制品有限公司,保定071000

出　　处：《中国腐蚀与防护学报》2021年第1期131-138,共8页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金(20576026);石家庄市科学技术研究与发展计划(161070251A)。

摘　　要：以过硫酸铵-亚硫酸氢钠为引发剂,将丙烯酰胺单体接枝到淀粉上制备了淀粉接枝共聚物(St-g-PAM),可作为一种新型“绿色”缓蚀剂。通过失重实验和电化学测试研究了St-g-PAM对1.0 mol/L HCl溶液中Zn的缓蚀效果。结果表明,St-g-PAM在HCl溶液中对Zn具有较好的缓蚀性,是一种混合抑制型缓蚀剂。缓蚀率随Stg-PAM质量浓度的增加而增大;但当浓度超过50 mg/L时,缓蚀率增加变缓慢。在20~50℃下,St-g-PAM在Zn表面的吸附过程与Langmuir吸附模型一致。动电位极化曲线和电化学阻抗测试结果表明,St-g-PAM在HCl溶液中对Zn有较好的缓蚀作用,表现为St-g-PAM存在条件下,Zn腐蚀电流密度减小,电荷转移电阻增大。Starch grafted copolymer(St-g-PAM)was prepared by grafting acrylamide monomer onto starch with ammonium persulfate sodium bisulfite as initiator,which can be used as a new"green"inhibitor.Then the inhibition effect of St-g-PAM on Zn in 1.0 mol/L HCl solution was studied by mass loss method and electrochemical techniques.The results show that St-g-PAM is a mixed inhibitor with good inhibition effect for Zn corrosion in HCl solution,while the inhibition efficiency increases with the increase of Stg-PAM concentration.However,the inhibition efficiency increases slowly when the St-g-PAM concentration exceeds 50 mg/L.At 20~50℃,the adsorption process of St-g-PAM on Zn sheet is consistent with Langmuir adsorption model.According to the results of potentiodynamic polarization and EIS measurements,the inhibition ability of St-g-PAM for Zn corrosion in HCl solution in the presence of St-g-PAM can be expressed in both of the decreased corrosion current density and increased charge transfer resistance values.

关 键 词：淀粉接枝共聚物 ZN 缓蚀剂 缓蚀机理 

分 类 号：TG174.42[金属学及工艺—金属表面处理]