Investigation of Pitting Corrosion in Sensitized Modified High-Nitrogen 316LN Steel After Neutron Irradiation

Merezhko, D. A.; Merezhko, M. S.; Gussev, Maxim N.; Busby, Jeremy T.; Maksimkin, O. P.; Short, Michael P.; Garner, F.A.

doi:10.1007/978-3-030-04639-2_71

Cited by 1 publication

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“…It was observed that the deepest pit in the 316LN CW-TA-24 h sample has 144 µm deep, whereas 123 µm-deep pits were observed for the 316LN AR-TA-24 h sample. It was reported that pit depth was found to depend on the formation of the secondary phases, i.e microstructure [33]. Owing to more extent of Cr depletion at carbides in the cold-worked condition as discussed in DLEPR compared to as-received thermally aged condition more pit depths were observed .…”

Section: Discussionmentioning

confidence: 96%

Localised corrosion susceptibility of nitrogen-containing type 316LN stainless steel in cold work and thermally aged conditions

Mannepalli

Shankar

Ningshen

et al. 2022

Corrosion Engineering, Science and Technology

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In the present paper, an investigation was carried out to understand the microstructure or secondary phase changes formed during thermal ageing at nose temperature (where Cr diffusion was faster) and its influence on the pitting corrosion behaviour of type 316LN SS with marginally lower Cr in as-received (AR) and 10% cold work (CW). X-ray diffraction studies confirmed Cr 23 C 6 and Cr 2 N in AR and CW conditions. On thermal ageing, AR material from 0 to 10 h and CW from 10 to 24 h, although with lower Cr, the degree of sensitisation (DOS) and pitting potential (E pit ) were insignificant due to nitrogen where as above 10 h in AR condition and below 10 h in CW condition resulted reductions in pitting potential (E pit ) in different chloride mediums. These results provide new insights on the interplay between pitting, microstructures, alloying elements.

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Section: Discussionmentioning

confidence: 96%