Corrosion behavior of heat-treated and cryorolled Al 5052 alloys in different chloride ion concentrations

Corrosion behavior of heat-treated and cryorolled Al 5052 alloys in different chloride ion concentrations

Purpose This paper aims to investigate the corrosion behaviour of heat-treated and cryorolled Al 5052 alloys in different Cl− ion concentrations. Design/methodology/approach NaCl solutions with concentrations of 0, 0.5, 3.5 and 5.5 per cent were selected. Samples were subjected to pre-heat treatment...

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Bibliographic Details
Published in:Anti-corrosion methods and materials Vol. 67; no. 1; pp. 7 - 15
Main Authors: Abu Seman, Anasyida, Chan, Ji Kit, Norazman, Muhammad Anas, Hussain, Zuhailawati, Brij, Dhindaw, Ismail, Azzura
Format: Journal Article
Language:English
Published: Bradford Emerald Publishing Limited 08-01-2020
Emerald Group Publishing Limited
Subjects:
Alloys
Aluminum base alloys
Annealing
Chloride ions
Corrosion
Corrosion potential
Corrosion rate
Corrosion resistance
Corrosion tests
Grain size
Heat
Heat treatment
Mechanical properties
Microstructure
Optical microscopes
Sodium chloride
Solution heat treatment
Al 5052 alloy
Heat treatment
Corrosion
Cryorolling
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Summary:Purpose This paper aims to investigate the corrosion behaviour of heat-treated and cryorolled Al 5052 alloys in different Cl− ion concentrations. Design/methodology/approach NaCl solutions with concentrations of 0, 0.5, 3.5 and 5.5 per cent were selected. Samples were subjected to pre-heat treatment (annealing at 300 °C and solution treatment at 540 °C) and cryorolling up to 30 per cent reduction before undergoing corrosion tests. The corrosion behaviour of the samples was then investigated by potentiodynamic polarization. The microstructure of the corroded samples was evaluated under an optical microscope, and the percentages of pits on their surfaces were calculated. Findings The cryorolled samples had a lower corrosion rate than the samples that were not cryorolled. The cryorolled sample that underwent solution treatment showed the highest corrosion resistance among all the samples tested. Practical implications The commercial impact of the study is the possibility of using the cryorolled Al alloy in various ion chloride environment. Originality/value The obtained results help in understanding the corrosion behaviour of cryorolled samples under different heat treatment conditions.
ISSN:0003-5599
1758-4221
DOI:10.1108/ACMM-03-2019-2092