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首页> 外文期刊>British Corrosion Journal >Exfoliation corrosion of high strength Al–Cu–Mg alloys: effect of grain structure
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Exfoliation corrosion of high strength Al–Cu–Mg alloys: effect of grain structure

机译：高强度Al–Cu–Mg合金的剥落腐蚀：晶粒结构的影响

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摘要

This paper describes the effect of differences in grain structure on the exfoliation corrosion of 2014 T651 and 2024 T351 Al–Cu–Mg alloy plate and relates the appearance of the corroded surface to the depth of attack. Specimens of each material were exfoliated using an acidified, intermittent salt fog (MASTMAASIS) test or by exposure to a coastal marine atmosphere. Corrosion was assessed by rating the surface appearance and by measuring the depth of attack by metallography and by a non-destructive four point bend test. The severity of exfoliation was shown to be related to the grain aspect ratio of the material, with the most advanced attack occurring on the midsection of the plate and ranked in the order T/2 > T/4 > surface. For each alloy there was a close relationship between the surface rating and the depth of attack. Exfoliation developed more rapidly in alloy 2024 T351 than in 2014 T651 as a result of the higher rate of intergranular corrosion.
机译：本文介绍了晶粒结构的不同对2014 T651和2024 T351 Al–Cu–Mg合金板剥落腐蚀的影响，并将腐蚀表面的外观与腐蚀深度相关。使用酸化的间歇盐雾（MASTMAASIS）测试或暴露在沿海海洋大气中对每种材料的样品进行剥离。通过评定表面外观并通过金相学和无损四点弯曲试验测量腐蚀深度来评估腐蚀。结果表明，剥落的严重程度与材料的晶粒长径比有关，其中最高级的侵蚀发生在板的中部，并以T / 2> T / 4>表面的顺序排列。对于每种合金，表面额定值与侵蚀深度之间存在密切关系。由于较高的晶间腐蚀速率，2024 T351合金的剥落发展速度比2014 T651快。

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  • 来源
    《British Corrosion Journal》 |1999年第1期|45-49|共5页
  • 作者

    Robinson M.J.; Jackson N.C.;

  • 作者单位

    The School of Industrial and Manufacturing Science, Cranfield University, Cranfield, MK43 0AL, Beds. UK;

    The School of Industrial and Manufacturing Science, Cranfield University, Cranfield, MK43 0AL, Beds. UK;

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