Acta Phys. -Chim. Sin. ›› 2010, Vol. 26 ›› Issue (05): 1225-1232.doi: 10.3866/PKU.WHXB20100516

• ELECTROCHEMISTRY • Previous Articles     Next Articles

Corrosion Inhibition and Antifog Properties of an Environmentally Friendly Polyaspartate Inhibitor on A3 Carbon Steel

XU Yi-Chun, TANG Bing, FU Feng-Lian, WANG Qiao-Yun, LIN Shao-Qiong, FENG Chun   

  1. Faculty of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, P. R. China; Faculty of Light and Chemical Engineering, Guangdong University of Technology, Guangzhou 510006, P. R. China
  • Received:2009-10-26 Revised:2010-01-14 Published:2010-04-29
  • Contact: TANG Bing E-mail:renytang@163.com

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Abstract:

The synergetic adsorption, antifogging and corrosion inhibition properties of polyaspartate (PASP) and dodecane phenol polyoxyethylene ether (OP-10) on A3 steel were investigated in 6 mol·L-1 HCl by weight loss and electrochemical techniques. Results showed that the combined inhibitor strongly inhibited the corrosion of A3 carbon steel in HCl. The efficiencies of corrosion inhibition and antifogging using 20 g·L-1 PASP were 94% and 83% , respectively. The inhibition efficiency decreased as the system temperature increased. The adsorption behavior of the combined inhibitor on the surface of the steel followed the amended Langmuir adsorption isotherm equation. The adsorption resulted in an entropy decrease and was a spontaneous and exothermic process. The combined inhibitors were anodic inhibitors.

Key words: Polyaspartate, Dodecane phenol polyoxyethylene ether, Inhibition and antifog, A3 carbon steel, Hydrochloric acid