绿色缓蚀剂聚天冬氨酸对铜的缓蚀性能与吸附行为  

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

作　　者：徐群杰[1] 朱律均[1] 曹为民[2] 万宗跃[1] 周国定[1] 林昌健[3] 

机构地区：[1]上海电力学院环境工程系,上海200090 [2]上海大学化学系,上海200444 [3]厦门大学固体表面物理化学国家重点实验室,福建厦门361005

出　　处：《物理化学学报》2008年第9期1724-1728,共5页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金(20406009);上海市教委重点项目(06ZZ67);上海市科委科技攻关计划(062312045);厦门大学固体表面物理化学国家重点实验室开放课题(200512);上海市重点学科(P1304)资助项目

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200mg·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15mg·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.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.

关 键 词：缓蚀剂 聚天冬氨酸 吸附 铜 交流阻抗 

分 类 号：TG174[金属学及工艺—金属表面处理]