腐蚀
介电谱
海水
电化学噪声
氧化物
材料科学
金属间化合物
合金
人工海水
透射电子显微镜
冶金
铝
聚焦离子束
电化学
化学工程
离子
化学
地质学
纳米技术
电极
海洋学
有机化学
物理化学
工程类
作者
Da-Hai Xia,Yuanyuan Ji,Ruifeng Zhang,Yingchang Mao,Yashar Behnamian,Wenbin Hu,Nick Birbilis
标识
DOI:10.1016/j.corsci.2023.110985
摘要
Localized corrosion of the aluminium alloy AA5083-H111 in a simulated dynamic seawater/air interfacial zone and a full seawater immersion zone was investigated with electrochemical impedance spectroscopy and electrochemical noise. Al-Fe/Ti intermetallic particles (IMPs) on localized corrosion were examined with focused ion beam, transmission electron microscopy and energy dispersive x-ray spectroscopy. As compared with the full immersion zone, the interfacial zone showed higher oxide film resistance and charge transfer resistance, which was attributed to the high oxygen flux in that zone. Localized corrosion arose from IMPs that posessed an Al-Fe phase and a Ti enriched phase.
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