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Citation: XU Qun-Jie, ZHU Lv-Jun, CAO Wei-Min, WAN Zong-Yue, ZHOU Guo-Ding, LIN Chang-Jian. Inhibition Action and Adsorption Behavior of Environment-Friendly Inhibitor Poly-Aspartate on Copper[J]. Acta Physico-Chimica Sinica, ;2008, 24(09): 1724-1728. doi: 10.3866/PKU.WHXB20080935 shu

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

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 Date: 25 February 2008
Available Online: 24 July 2008

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.
- Inhibitor; PASP; Adsorption; Copper; AC impendence
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