Effect of Weld Oxide on the Corrosion Resistance of Gas Metal Arc Welded Ferritic Stainless Steel Exposed to Simulated Exhaust Condensate
The corrosion resistance of a gas metal arc weld and its dependence on the oxide formed at different peak temperatures were investigated. Iron oxide was formed at the outermost surface of the heat-affected zone of welded specimen and the specimen heated to 500 °C. A chromium oxide film formed at higher peak temperatures and the peak temperature rise increased the oxide thickness and Cr content within the oxide scale. The corrosion resistance of the specimens containing Fe oxide at the outer layer was reduced, while the specimens heated to 1100 and 1350 °C had better corrosion resistance due to the strong passivity of the thick Cr oxide.
KeywordsFerritic stainless steel Heat affected zone (HAZ) Weld Chromium oxide
This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korea Government (Ministry of Education and Science Technology) (No. NRF-2012R1A2A2A03046671).
Compliance with Ethical Standards
Conflict of interest
The authors declare that they have no conflict of interest.
All of authors checked the ‘Instructions for Authors’ carefully and this study obeyed the rules.
Human and Animals Rights and Informed Consent
There were no human participants and animals in this study.
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