Paper Title:
Discussion on the Mechanism of Corrosion Resistance of High Temperature QPQ Treated Specimens in H2S Environment
| Periodical | Applied Mechanics and Materials (Volumes 66 - 68) |
|---|---|
| Main Theme | Mechanical, Materials and Manufacturing Engineering |
| Edited by | Honghua Tan |
| Pages | 665-668 |
| DOI | 10.4028/www.scientific.net/AMM.66-68.665 |
| Citation | Yuan Hui Li et al., 2011, Applied Mechanics and Materials, 66-68, 665 |
| Online since | July, 2011 |
| Authors | Yuan Hui Li, Shi Ping Zhang, Yi Chao Ding, Zi Lian Jiang |
| Keywords | Corrosion Resistance, H2S Corrosion Resistance, High Temperature QPQ Technology, Salt Bath Nitriding |
| Price | US$ 28,- |
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Abstract
By constant stress tensile test, the corrosion mechanism of high temperature QPQ treated 25CrMnMo steel specimen in H2S environment was analyzed and discussed. The γ′-Fe4N in the ε compound layer turns into corrosion substance in the test and expands. At the surface of the ε compound layer, the corrosion layer is visible. The compound layer breaks off in little blocks for volume expansion of the corrosion substance and the exterior tensile stress. The coefficient of diffusion of hydrogen atom in the ε compound layer is very low, that decrease the probability of the hydrogen-induced corrosion of high temperature QPQ treated specimens in H2S environment.
