Effect of low temperature carburizing on the corrosion and mechanical behavior of AISI 304 austenitic stainless steel after hydrogen charging
Övrigt konferensbidrag, 2023

Hydrogen is a clean and renewable energy that could replace fossil fuels, being beneficial to sustainability. Many metallic components in hydrogen energy systems are made from austenitic stainless steels. This research evaluates the effect of hydrogen uptake on the mechanical and corrosion properties of AISI 304 commercial austenitic stainless steel with and without low temperature carburising (LTC) process S³P feat. Kolsterising®. Both solution annealed (SA) and cold worked (CW) conditions were included. Hydrogen was introduced into the steel by the cathodic electrochemical hydrogen charging method. Open circuit potential (OCP) test and potentiodynamic polarisation were employed to evaluate the corrosion resistance in 3.5 wt.% NaCl solution. Specific tensile tests were performed to evaluate susceptibility to hydrogen embrittlement (HE). It has been found that hydrogen uptake causes surface cracking, reduces OCP, corrosion potential, and breakdown potential considerably, accelerating corrosion. LTC samples showed increased OCP and corrosion potential compared to untreated samples after hydrogen uptake. For cold worked 304, LTC treatment improves the resistance to HE significantly due to stabilized austenite and consequently reduced deformation-induced martensite. In solution annealed condition, HE susceptibility was improved slightly by LTC treatment. The results from the current study demonstrated the beneficial effect of this surface engineering approach, i.e., LTC treatment on achieving an improved material performance when exposed to hydrogen.

Corrosion

Expanded Austenite

Austenitic Stainless Steel

Hydrogen Embrittlement.

Low Temperature Carburising

Författare

Xiao Qin

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Alexandra Bauer

Bodycote

Lars Nyborg

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Emmy Cao

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Eric Tam

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Huiqun Liu

Central South University

ECHT 2023 - European Conference on Heat Treatment 2023
Genova, Italy,

Ämneskategorier

Metallurgi och metalliska material

Korrosionsteknik

Styrkeområden

Materialvetenskap

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Senast uppdaterat

2024-08-09