海水环境中典型阴离子对5083铝合金腐蚀行为的影响
采用析因分析试验及动电位极化曲线、电化学阻抗谱（EIS）等测试方法,研究了海水环境因素中的典型阴离子（Cl^-、HCO3^-、SO4^2-）交互作用对5083铝合金耐蚀性的影响.结果表明,三种阴离子中,Cl^-、HCO3^-对铝合金点蚀起促进作用.Cl^-与HCO3^-交互作用时,在Cl^-浓度一定的情况下,随着HCO3^-浓度的增加,5083铝合金耐蚀性呈现出上升→下降→再上升的趋势,在70-90 mg·L-（-1）时耐蚀性能明显降低;在HCO3^-浓度一定的情况下,Cl^-浓度较低时5083铝合金耐蚀性比Cl^-浓度较高时差.在Cl^-、HCO3^-浓度较低情况下,SO4^2-具有抑制腐蚀...
Saved in:
| Published in | 电化学 Vol. 23; no. 4; pp. 466 - 472 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
2017
|
| Subjects | |
| Online Access | Get full text |
| ISSN | 1006-3471 2993-074X |
| DOI | 10.13208/j.electrochem.160614 |
Cover
| Summary: | 采用析因分析试验及动电位极化曲线、电化学阻抗谱（EIS）等测试方法,研究了海水环境因素中的典型阴离子（Cl^-、HCO3^-、SO4^2-）交互作用对5083铝合金耐蚀性的影响.结果表明,三种阴离子中,Cl^-、HCO3^-对铝合金点蚀起促进作用.Cl^-与HCO3^-交互作用时,在Cl^-浓度一定的情况下,随着HCO3^-浓度的增加,5083铝合金耐蚀性呈现出上升→下降→再上升的趋势,在70-90 mg·L-（-1）时耐蚀性能明显降低;在HCO3^-浓度一定的情况下,Cl^-浓度较低时5083铝合金耐蚀性比Cl^-浓度较高时差.在Cl^-、HCO3^-浓度较低情况下,SO4^2-具有抑制腐蚀的作用;当Cl^-、HCO3^-浓度较高时,SO4^2-抑制腐蚀的作用不明显. |
|---|---|
| Bibliography: | 5083 aluminum alloy; corrosion resistance; electrolyte effect; seawater environment The interaction effects of typical anions, namely, CI-, HCO; and SO4：, 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 poten- tials, corrosion current densities and the breakdown potentials were examined in different concentrations of Cl^-, HCO3^- and SO4^2-. The corrosion behavior was analyzed by electrochemical impedance spectroscopy （EIS）. The results showed that both Cl^- 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. Ll, which displayed the best corrosion resistance perf |
| ISSN: | 1006-3471 2993-074X |
| DOI: | 10.13208/j.electrochem.160614 |