Role of complex nonmetallic inclusions on the localized corrosion resistance of wire arc additively manufactured super duplex stainless steel

Xianhang Huang; Wenfeng Qiu; Ben Niu; Xiaodong Zou; Linlin Pan; Chi Tat Kwok

Journal of Materials Research and Technology (Jan 2024)

Role of complex nonmetallic inclusions on the localized corrosion resistance of wire arc additively manufactured super duplex stainless steel

Xianhang Huang,
Wenfeng Qiu,
Ben Niu,
Xiaodong Zou,
Linlin Pan,
Chi Tat Kwok

Affiliations

Xianhang Huang: Guangdong Provincial Key Laboratory of Advanced Welding Technology, China-Ukraine Institute of Welding, Guangdong Academy of Sciences, Guangzhou, China; South China Advanced Institute for Soft Matter Science and Technology, School of.Emergent Soft Matter, South China University of Technology, Guangzhou, China
Wenfeng Qiu: South China Advanced Institute for Soft Matter Science and Technology, School of.Emergent Soft Matter, South China University of Technology, Guangzhou, China
Ben Niu: Guangdong Provincial Key Laboratory of Advanced Welding Technology, China-Ukraine Institute of Welding, Guangdong Academy of Sciences, Guangzhou, China
Xiaodong Zou: Guangdong Provincial Key Laboratory of Advanced Welding Technology, China-Ukraine Institute of Welding, Guangdong Academy of Sciences, Guangzhou, China
Linlin Pan: Guangdong Provincial Key Laboratory of Advanced Welding Technology, China-Ukraine Institute of Welding, Guangdong Academy of Sciences, Guangzhou, China; Corresponding author.
Chi Tat Kwok: Department of Electromechanical Engineering, University of Macau, Macau, China; Institute of Applied Physics and Materials Engineering, University of Macau, Macau, China; Corresponding author. Department of Electromechanical Engineering, University of Macau, Macau, China.

Journal volume & issue: Vol. 28
pp. 799 – 813

Abstract

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This study investigated the correlation between the MnS·xMnO·yAl2O3·zSiO2·TiN complex inclusions and localized corrosion initiation of the wire arc additively manufactured (WAAMed) super duplex stainless steel (SDSS) part. The results showed that partial dissolution of crystalline MnS within the complex inclusions generated an acidic aggressive environment to led the dissolution of amorphous oxides part, thereby triggering the process of localized corrosion. Additionally, micro-crevices between the inclusions and metallic matrix exacerbated localized corrosion. Finally, the catalytic-occluded cells accelerated propagation of pits. Hence, formation of high density of inclusions resulted in the poor localized corrosion resistance and repassivation ability of the as-built WAAMed SDSS.

Published in Journal of Materials Research and Technology

ISSN: 2238-7854 (Print); 2214-0697 (Online)
Publisher: Elsevier
Country of publisher: Netherlands
LCC subjects: Technology: Mining engineering. Metallurgy
Website: https://www.journals.elsevier.com/journal-of-materials-research-and-technology/

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