Resistance to Pit Formation and Pit Growth for Different Tempers of AA2024 Aluminium Alloy in Presence of Benzotriazole

Bore Jegdić; Biljana Bobić; Maja Stevanović; Marija Mihailović; Dunja Daničić; Jovanka Kovačina; Bojana Radojković

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자료유형: 학술저널

저자정보: Bore Jegdić (University of Belgrade) Biljana Bobić (University of Belgrade) Maja Stevanović (University of Belgrade) Marija Mihailović (University of Belgrade) Dunja Daničić (University of Belgrade) Jovanka Kovačina (University of Belgrade) Bojana Radojković (University of Belgrade)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.26 No.11

발행연도: 2020.1

수록면: 1,643 - 1,653 (11page)

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The paper analyses the corrosion behaviour of both naturally and artificially aged AA2024 aluminium alloy in NaCl solutionin the presence of the corrosion inhibitor benzotriazole (BTA). The differences between these two aging tempers in termsof resistance to general corrosion are explained as well as the differences in terms of pit formation and pit growth. Basedon the values of the polarisation resistance and the corrosion current density, the general corrosion resistance of the alloyis determined in the absence and in the presence of BTA. The resistance to pit formation and pit growth is determined onthe basis of the polarisation measurements results. Scanning electron microscopy confirmed the expected differences in theappearance and size of the pits formed in naturally aged and artificially aged alloy. In the presence of the corrosion inhibitorBTA, for both aging tempers of the alloy, the corrosion resistance is significantly higher compared to the resistance in thesolution without the inhibitor. The value of the polarisation resistance for both aging tempers increases over time. However,at the same time, the value of the constant phase element increases as well. An explanation for this phenomenon is provided. The calculated average value of the thickness of the adsorbed inhibitor layer on the surface of the aluminium alloy is inaccordance with the inhibitor protective ability for both aging tempers.

#Aluminium alloys · Microstructure · Pitting corrosion · Electrochemical impedance spectroscopy · Scanning electron microscopy

참고문헌 (50)

참고문헌 신청

J.E. Hatch / 1984 / Aluminum Properties and Physical Metallurgy / ASM International :351~378

J.R. Davis / 1999 / Corrosion of Aluminum and Aluminum Alloys / ASM International :25~43

V.S. Sinjavskij / 1986 / Corrosion and Protection of Aluminium alloys / Metallurgia :226~237

P. G. Fox / 1979 / Corros. Sci 19:457

M. Finšgar / 2010 / Corros. Sci 52:2737

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