【摘要】 采用电化学阻抗谱、开路电位测试和阴极极化曲线,结合扫描电镜成像分析,研究了模拟大气环境不同液膜厚度和交流电场对A6082-T6铝合金腐蚀行为的影响。结果表明:降低液膜厚度加速了铝合金A6082-T6的腐蚀,交流电场显著改变了铝合金局部腐蚀形态,从大量点蚀转变成出现严重的剥蚀。更多还原

【Abstract】 The effect of alternating electric field on the corrosion behavior of A6082-T6 Al-alloy in an artificial atmospheric environment, namely, an electrolyte film on the surface of Al-alloy is studied by means of electrochemical impedance spectroscopy, open circuit potential and cathodic polarization curve measurements, as well as scanning electron microscopy. The results show that, with the decreasing of thickness of electrolyte film, the corrosion rate of A6082-T6 Al-alloy was accelerated. Meanwhile, the applied AC electric field could clearly alter the morphology of localized corrosion type of A6082-T6 Al-alloy,namely transformed from pitting corrosion with a large number of pits to serious exfoliation corrosion.更多还原