Corrosion Behavior of 16Cr3NiWMoVNbE Steel in Typical Atmospheric Environments

WANG Xiaohui; LIU Zhenbao; JIANG Dongchen; JIANG Lipeng; ZHU Shuo; ZHAO Wenyu; LIANG Jianxiong; YANG Zhiyong

doi:10.7643/ issn.1672-9242.2025.12.018

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Equipment Environmental Engineering ›› 2025, Vol. 22 ›› Issue (12) : 140-147. DOI: 10.7643/ issn.1672-9242.2025.12.018

Environmental Test and Observation

Corrosion Behavior of 16Cr3NiWMoVNbE Steel in Typical Atmospheric Environments

WANG Xiaohui, LIU Zhenbao, JIANG Dongchen, JIANG Lipeng, ZHU Shuo, ZHAO Wenyu, LIANG Jianxiong, YANG Zhiyong

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Abstract

The work aims to investigate the natural corrosion laws of 16Cr3NiWMoVNbE steel in Wanning, Jiangjin, and Xishuangbanna. The corrosion law was studied by means of mechanical property test, corrosion rate, pitting corrosion rate and microstructure analysis. After 2 years of atmospheric exposure, the steel in Xishuangbanna exhibited the lowest annual average corrosion rate (7.29 g/(m²·a)) and pitting corrosion rate (64.21 μm/a), whereas the steel in Wanning showed the highest values of 69.60 g/(m²·a) and 122.65 μm/a. The tensile strength of the steel decreased by 22.4%, 9.2%, and 4.5% in Wanning, Jiangjin, and Xishuangbanna, respectively after 2 years of atmospheric exposure, while the elongation after fracture decreased by 48.9%, 9.6%, and 2.1%. These results indicated that the damp hot marine environment in Wanning had a more pronounced adverse effect on mechanical properties. Pitting corrosion is the primary cause of the reduction in mechanical property and the MC and M₇C₃ carbides in the steel promote pitting corrosion.

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16Cr3NiWMoVNbE steel / exposure test / atmospheric environment / corrosion / mechanical properties / carbides

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WANG Xiaohui, LIU Zhenbao, JIANG Dongchen, JIANG Lipeng, ZHU Shuo, ZHAO Wenyu, LIANG Jianxiong, YANG Zhiyong. Corrosion Behavior of 16Cr3NiWMoVNbE Steel in Typical Atmospheric Environments[J]. Equipment Environmental Engineering. 2025, 22(12): 140-147 https://doi.org/10.7643/ issn.1672-9242.2025.12.018

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