Failure Analysis of Hydrogen Corrosion of the Lens Gasket

Abstract:

The 10MoWVNb steel lens gaskets are widely used for the flange linking of high pressure tube in the synthetic ammonia system in chemical fertilizer plant. The gasket worked in H₂-N₂-NH₃ environment at the temperature of 300°C. It often fails because of hydrogen corrosion. The microstructure and corrosion characteristic of the lens gasket were studied by optical microscope. The results showed that the hydrogen blister appeared preferentially at the interface of inclusions. The corrosion depth was 0.65 millimeter. There were little intergranular crack on inner surface.

• Periodical: Applied Mechanics and Materials (Volumes 37-38)
• Pages: 462-465
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.37-38.462
• Online since: November 2010
• Authors: Xiao Chun Ma, Guang Fei Xu
• Keywords: Failure Analysis, Hydrogen Blister, Hydrogen Corrosion, Lens Gasket

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