Developement of reliable accelerated corrosion tests for aluminum alloys used in the aerospace industry

IF 1.1 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Pub Date : 2023-06-18 DOI:10.5006/4356

F. Peltier, D. Thierry

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Abstract

Aluminum alloys are not immune to corrosion which can take the form of localized corrosion. Thus, the assessment of the corrosion behavior of aluminum alloys under atmospheric conditions is a major topic for the aerospace industry. One major difficulty in this task is the lack of robust and reliable accelerated corrosion test(s) in this field. Indeed, several tests as the Neutral Salt Spray test (ASTM B117) are used to assess the general corrosion resistance of aluminum, but these tests were not developed specifically for the aerospace industry and are not representative of service conditions. The aim of the present study was to compare the results of various accelerated corrosion tests conditions (ASTM B117, VDA 233-102, Volvo STD 423-0014) with newly developed test conditions. Hence different accelerated corrosion tests were designed by varying several parameters in the Volvo STD 423-0014 such as the salt concentration, the time of wetness and the relative humidity. The results obtained on 8 aluminum alloys (2xxx, 7xxx and Al-Li alloys) were then compared to marine exposures. From the results, one test provides the same type of corrosion attacks on the different alloys as under atmospheric exposures in the marine site and a good acceleration factor.

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航空航天工业用铝合金可靠加速腐蚀试验的发展

铝合金并非不受腐蚀，它可以采取局部腐蚀的形式。因此，评估铝合金在大气条件下的腐蚀行为是航空航天工业的一个主要课题。这项任务的一个主要困难是在该领域缺乏可靠的加速腐蚀试验。实际上，一些试验如中性盐雾试验(ASTM B117)用于评估铝的一般耐腐蚀性，但这些试验不是专门为航空航天工业开发的，也不能代表使用条件。本研究的目的是比较各种加速腐蚀试验条件(ASTM B117, VDA 233-102, Volvo STD 423-0014)与新开发的试验条件的结果。为此，通过改变沃尔沃STD 423-0014标准中的盐浓度、浸湿时间和相对湿度等参数，设计了不同的加速腐蚀试验。然后将8种铝合金(2xxx, 7xxx和Al-Li合金)的结果与海洋暴露进行了比较。从结果来看，一个测试提供了与海洋环境中大气暴露相同类型的不同合金的腐蚀攻击，并且具有良好的加速因子。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Corrosion MATERIALS SCIENCE, MULTIDISCIPLINARY-METALLURGY & METALLURGICAL ENGINEERING

CiteScore

2.80

自引率

12.50%

发文量

审稿时长

3 months

期刊介绍： CORROSION is the premier research journal featuring peer-reviewed technical articles from the world’s top researchers and provides a permanent record of progress in the science and technology of corrosion prevention and control. The scope of the journal includes the latest developments in areas of corrosion metallurgy, mechanisms, predictors, cracking (sulfide stress, stress corrosion, hydrogen-induced), passivation, and CO2 corrosion. 70+ years and over 7,100 peer-reviewed articles with advances in corrosion science and engineering have been published in CORROSION. The journal publishes seven article types – original articles, invited critical reviews, technical notes, corrosion communications fast-tracked for rapid publication, special research topic issues, research letters of yearly annual conference student poster sessions, and scientific investigations of field corrosion processes. CORROSION, the Journal of Science and Engineering, serves as an important communication platform for academics, researchers, technical libraries, and universities. Articles considered for CORROSION should have significant permanent value and should accomplish at least one of the following objectives: • Contribute awareness of corrosion phenomena, • Advance understanding of fundamental process, and/or • Further the knowledge of techniques and practices used to reduce corrosion.