Corrosion behaviour of dual-phase and galvanized steel in concrete
Purpose: The purpose of this paper is to present results of an evaluation of dual-phase and galvanized steel reinforcements in corrosive environments. Design/methodology/approach: Low carbon steels were intercritically annealed at 740°C followed by water quenching to obtain dual-phase structures wit...
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| Main Authors: | , , |
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| Format: | Conference or Workshop Item |
| Published: |
2007
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| Subjects: | |
| Online Access: | http://eprints.utm.my/id/eprint/13872/ |
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| Summary: | Purpose: The purpose of this paper is to present results of an evaluation of dual-phase and galvanized steel reinforcements in corrosive environments. Design/methodology/approach: Low carbon steels were intercritically annealed at 740°C followed by water quenching to obtain dual-phase structures with 37 per cent volume fraction of martensite dispersed in ferrite matrix. Dual-phase and galvanized steel rebars were embedded in concrete cubes and immersed in 5 per cent NaCl solution for up to 100 days. Corrosion rate, tensile and macro as well as microhardness tests were performed. The dual-phase and galvanized zinc layers were observed under scanning electron microscopy (SEM). Findings: From all of the tests carried out it was found that dual-phase steels exhibited better corrosion resistant properties and superior strength compared to galvanized steels. Originality/value: The results reported show that dual-phase steel can be a good candidate for reinforcement in concrete especially in aggressive and corrosive environments. |
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