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Real-time corrosion monitoring of aluminium alloys under chloride-contaminated atmospheric conditions
RISE Research Institutes of Sweden, Materials and Production, Corrosion. (Institut de la Corrosion)ORCID iD: 0000-0002-6347-994x
RISE Research Institutes of Sweden, Materials and Production, Corrosion. (Institut de la Corrosion)ORCID iD: 0000-0001-6175-5579
RISE Research Institutes of Sweden, Materials and Production, Corrosion. (Institut de la Corrosion)ORCID iD: 0000-0001-9513-6928
RISE Research Institutes of Sweden, Materials and Production, Corrosion. (Institut de la Corrosion)ORCID iD: 0000-0001-5462-2700
2021 (English)In: Materials and corrosion - Werkstoffe und Korrosion, ISSN 0947-5117, E-ISSN 1521-4176, Vol. 72, no 8, p. 1377-1387Article in journal (Refereed) Published
Abstract [en]

In this study, the use of electrical resistance (ER) sensors to monitor the corrosion of Al94Cu6 alloy is assessed and compared with 2024-T3 coupons. Under uniform corrosion, a good correlation was found between the ER sensors and mass loss on coupons. Three different chloride depositions are studied: (i) pre-contamination with dry/wet cycles, (ii) Volvo standard accelerated corrosion test and (iii) neutral salt spray test. The obtained results show good reproducibility of the ER sensors under all tested conditions. This suggests that ER sensors more levelled the effect of localised corrosion through a large surface evaluation compared with cross-sections. The corrosion thickness obtained with the ER sensors does not correspond to the mean depth obtained by cross-sections. This can be explained by the distribution and size of the localised corrosion events according to a finite element model proposed. The ER method allows obtaining useful real-time corrosion data for the understanding of the corrosion mechanisms and the development of accelerated tests. The chloride concentration, the frequency of salt application and wet/dry cycles have a strong influence on the corrosion rate of aluminium alloys. © 2021 The Authors. 

Place, publisher, year, edition, pages
Wiley-VCH Verlag , 2021. Vol. 72, no 8, p. 1377-1387
Keywords [en]
2024-T3, accelerated tests, aluminium alloys, corrosion, electrical resistance sensors, finite element method, integranular, neutral salt spray, Aluminum alloys, Aluminum compounds, Atmospheric corrosion, Binary alloys, Chlorine compounds, Copper alloys, Copper corrosion, Corrosion rate, Electric resistance, Localized corrosion, Seawater corrosion, Accelerated corrosion tests, Atmospheric conditions, Chloride concentrations, Chloride depositions, Electrical resistances, Neutral salt spray test, Real time corrosion data, Real time corrosion monitoring, Aluminum corrosion
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:ri:diva-52595DOI: 10.1002/maco.202112302Scopus ID: 2-s2.0-85100509820OAI: oai:DiVA.org:ri-52595DiVA, id: diva2:1538527
Available from: 2021-03-19 Created: 2021-03-19 Last updated: 2023-05-22Bibliographically approved

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Diler, ErwanPeltier, FabienneBecker, JohanThierry, Dominique

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