Consequences of mobile and trapped hydrogen on the dissolution kinetics and pitting processes of an austenitic stainless steel

Duportal, Malo; Feaugas, X.; Oudriss, A.; Savall, C.

doi:10.1016/j.corsci.2022.110546

Cited by 10 publications

(1 citation statement)

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“…In this paper, the hydrogen charging current density is 10 mA/cm 2 and the hydrogen charging time is It can be seen that the diffusible hydrogen concentration in welded joints of 2205 DSS is higher than that of the BM under the same hydrogen charging conditions, and the high diffusible hydrogen concentration may lead to more severe hydrogen damage. 35 High hydrogen concentrations also indicate that hydrogen is more likely to be enriched in the welded joint or that hydrogen is more likely to interact with the welded structure.…”

Section: Determination Of Diffusible Hydrogen Contentmentioning

confidence: 99%

Effect of hydrogen on the pitting corrosion of 2205 duplex stainless steel welded joints

Zheng,

Zhang,

Wang

et al. 2024

Corrosion Engineering, Science and Technology: The Internationa

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The effect of hydrogen on the pitting susceptibility of 2205 duplex stainless steel welded joints was investigated using metallographic characterisation, electrochemical techniques and immersion experiments. The results show that the diffusible hydrogen content in the welded joints is approximately twice that of base material (BM). Hydrogen significantly decreases the pitting potential (Epit) of the welded joints, while increasing the carrier density in the passive film, suggesting that hydrogen weakens the protective properties of the passive film and increases the pitting susceptibility of the welded joints. According to immersion experiments, the pitting susceptibility of the welded joint from high to low is heat-affected zone (HAZ), BM and weld metal (WM), the HAZ tends to be more prone to the formation of larger and more stable pits, and the number of inclusions at the HAZ is significantly greater than that at the BM and WM. For BM under hydrogen charging, austenite phase is usually corroded first, because hydrogen tends to be enriched in the austenitic phase of BM. However, in some regions of WM, ferrite phase corroded first, which is related to the enrichment of hydrogen in the ferrite in the weld area.

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Section: Determination Of Diffusible Hydrogen Contentmentioning

confidence: 99%