电化学2017，Vol.23Issue(4)：466-472,7.DOI:10.13208/j.electrochem.160614
海水环境中典型阴离子对5083铝合金腐蚀行为的影响
Influences of Typical Anions in Seawater Environments on Corrosion Behaviors of 5083 Aluminum Alloy
摘要
Abstract
The interaction effects of typical anions,namely,Cl-,HCO3 and SO42-,presented in seawater environments on corro sion resistance behaviors of AA5083 aluminum alloy have been studied.The corrosion resistances of the 5083 aluminum alloy in different simulated seawater environments were tested by factorial analysis method.The polarization curves,the corrosion potentials,corrosion current densities and the breakdown potentials were examined in different concentrations of C1-,HCO3 and SO42-.The corrosion behavior was analyzed by electrochemical impedance spectroscopy (EIS).The results showed that both C1-and HCO3-could accelerate the pitting corrosion.When the concentration of CI remained constant,the corrosion resistance of AA5083 aluminum alloy increased initially with an increase in the concentration of HCO3-,and then dropped dramatically at 70 ～ 90 mg·L-1,which displayed the best corrosion resistance performance.Afterwards,the corrosion resistance increased again.The corrosion current density of AA5083 aluminum alloy was not significantly affected by SO42-when the concentrations of C1-and HCO3 became larger.Meanwhile,when the concentration of HCO3 was fixed,the charge-transfer resistance of AA5083 aluminum alloy at a lower C1-concentration was smaller than that at a higher C1-concentration,and the corrosive ions could easily penetrate the native oxide film by a redox reaction with the matrix.关键词
5083铝合金/耐蚀性/电解质效应/海水环境Key words
5083 aluminum alloy/corrosion resistance/electrolyte effect/seawater environment分类
化学化工引用本文复制引用
涂扬帆,冯立明,方志刚,刘海涛,井明华,管勇..海水环境中典型阴离子对5083铝合金腐蚀行为的影响[J].电化学,2017,23(4):466-472,7.基金项目
国家自然科学基金项目(No.51201169)资助 （No.51201169）
