物理化学学报 >> 2008, Vol. 24 >> Issue (09): 1724-1728.doi: 10.3866/PKU.WHXB20080935

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绿色缓蚀剂聚天冬氨酸对铜的缓蚀性能与吸附行为

徐群杰; 朱律均; 曹为民; 万宗跃; 周国定; 林昌健   

  1. 上海电力学院环境工程系, 上海 200090; 上海大学化学系, 上海 200444; 厦门大学固体表面物理化学国家重点实验室, 福建 厦门 361005
  • 收稿日期:2008-02-25 修回日期:2008-06-13 发布日期:2008-09-10
  • 通讯作者: 徐群杰 E-mail:xuqunjie@shiep.edu.cn

Inhibition Action and Adsorption Behavior of Environment-Friendly Inhibitor Poly-Aspartate on Copper

XU Qun-Jie; ZHU Lv-Jun; CAO Wei-Min; WAN Zong-Yue; ZHOU Guo-Ding; LIN Chang-Jian   

  1. Department of Environment Engineering, Shanghai University of Electric Power, Shanghai 200090, P. R. China; Department of Chemistry, Shanghai University, Shanghai 200444, P. R. China; State Key Laboratory of Solid Surface Physical Chemistry, Xiamen University, Xiamen 361005, Fujian Province, P. R. China
  • Received:2008-02-25 Revised:2008-06-13 Published:2008-09-10
  • Contact: XU Qun-Jie E-mail:xuqunjie@shiep.edu.cn

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摘要： 采用电化学阻抗和极化曲线法研究了绿色缓蚀剂聚天冬氨酸(PASP)对铜在200 mg·L-1的NaCl溶液中的缓蚀性能和吸附行为. 结果表明, 在20 ℃时, PASP使用的最佳浓度为15 mg·L-1, 缓蚀率可达到78.3%, PASP的吸附明显降低了Cl-的侵蚀, 属于阳极型缓蚀剂. 随着温度的升高, PASP的缓蚀性能下降. 在50 ℃时, PASP的缓蚀率下降至40.4%. PASP的吸附行为服从Langmuir吸附等温式,是自发的、放热的过程, 属于化学吸附.

关键词: 缓蚀剂, 聚天冬氨酸, 吸附, 铜, 交流阻抗

Abstract: The inhibition action and adsorption behavior of an environment-friendly inhibitor poly-aspartate (PASP) on copper in aqueous NaCl (0.02%) solution were investigated by means of electrochemical techniques. The results indicated that the best inhibition efficiency of PASP was 78.3% with the concentration of 15 mg·L-1 at 20 ℃. The adsorption of PASP prevented Cu from being corroded and PASP was an anodic inhibitor. The inhibition efficiency of PASP decreased with the increase in solution temperature, it decreased to 40.4% at 50 ℃. The adsorption behavior of PASP followed Langmuir isotherm, it was spontaneous and exothermic, and belonged to chemical adsorption.

Key words: Inhibitor, PASP, Adsorption, Copper, AC impendence