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材料工程  2013 

2524铝合金包铝层在模拟油箱积水环境中结垢及其对腐蚀行为的影响

DOI: 10.3969/j.issn.1001-4381.2013.05.003

Keywords: 2524铝合金,模拟油箱积水,结垢,腐蚀

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Abstract:

基于飞机油箱舱内铝合金在油箱积水环境中发生的结垢及腐蚀行为,采用电子显微镜(SEM)、能谱仪(EDS)和视频显微镜等设备研究了带包铝层的2524铝合金在模拟油箱积水环境中的结垢及其对腐蚀行为的影响。结果表明2524铝合金包铝层在模拟油箱积水环境中的结垢行为分为两个阶段,浸泡初期主要为胶体铁在试样表面的沉聚,浸泡中后期则以难溶的金属氢氧化物沉积为主,且结垢面积随时间按照特定的幂函数变化;在浸泡前24h,结垢产物促进铝合金的腐蚀,在24h以后,结垢产物对铝合金包铝层的腐蚀起到一定的抑制作用。

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