화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.20, No.6, 4276-4285, November, 2014
DOI10.1016/j.jiec.2014.01.033  Export Citation
Plant derived cationic dye as an effective corrosion inhibitor for 7075 aluminum alloy in 3.5% NaCl solution
Ambrish Singh1, 2, Yuanhua Lin1, †, Wanying Liu1, Shijie Yu3, Jie Pan4, Chengqiang Ren3, and Deng Kuanhai4
  • 1State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500, China
  • 2Department of Chemistry, School of Civil Engineering, LFTS, Lovely Professional University, Phagwara, Punjab 144402, India
  • 3School of Material Science and Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China
  • 4CNPC Key Lab for Tubular Goods Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500, China
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The inhibition of the corrosion of 7075 aluminum alloy in 3.5 wt.% NaCl solution by 5,6-dihydro-9,10-dimethoxybenzo[g]-1,3-benzodioxolo[5,6-a]quinolizinium (berberine) has been studied using electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, scanning electrochemical microscopy (SECM) and scanning electron microscopy (SEM). Inhibition efficiency was found to increase with increasing concentration of berberine. The adsorption of the berberine on the 7075 aluminum alloy surface obeyed the Langmuir adsorption isotherm. The adsorbed film on 7075 aluminum alloy surface containing inhibitor was confirmed by the SEM, and SECM. The results obtained showed that the berberine could serve as an effective inhibitor of the corrosion of 7075 aluminum alloy in 3.5% NaCl.
Keywords:Aluminum alloy;SECM;SEM;Inhibition;EIS
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