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首页> 外文期刊>Journal of Materials Engineering and Performance >Characterization of Localized Corrosion in an Al-Cu-Li Alloy
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Characterization of Localized Corrosion in an Al-Cu-Li Alloy

机译：Al-Cu-Li合金中局部腐蚀的表征

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摘要

Corrosion behaviors of recently developed 2A97-T6 aluminum-copper-lithium alloy in sodium chloride solution are investigated using scanning electron and transmission electron microscopies in conjunction with electron backscatter diffraction. It has been found that corrosion product rings were established on the alloy surface as early as 5 min during immersion in sodium chloride solution. Meanwhile, hydrogen continuously evolved from within the rings. Pitting corrosion is evident with crystallographic dependant corrosion channel facets mainly parallel to {100} planes. Non-uniform distribution of misorientation in the 2A97 aluminum alloy results in a portion of grains of relatively high stored energy. Such grains were preferentially attacked, serving as local anodes, during the development of crystallographic pitting.
机译：使用扫描电子和透射电子显微镜结合电子背散射衍射研究了最近开发的2A97-T6铝-铜-锂合金在氯化钠溶液中的腐蚀行为。已经发现，在浸入氯化钠溶液期间，合金表面上早在5分钟时就形成了腐蚀产物环。同时，氢从环内连续放出。点蚀主要由平行于{100}平面的与晶体学有关的腐蚀通道刻面所证实。 2A97铝合金中取向错误的不均匀分布会导致一部分晶粒具有较高的储能。在结晶点蚀的过程中，这些晶粒被优先侵蚀，用作局部阳极。

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