Corrosion fatigue of 16Mn pressure vessel steel in H2S environment
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Authors: Pan, J.Z. and Khan, Z.A.
Journal: American Society of Mechanical Engineers, Pressure Vessels and Piping Division (Publication) PVP
This paper1 introduces recent research work on the corrosion fatigue of 16Mn pressure vessel steel in the environment of saturated H2S solution. The aim of this research is to estimate the effects of sulfur contained in crude oil on the pressure vessel steels in oil refinery plants of the petrochemical industry. A cantilever beam testing device was built to do tests in the corrosion environment, and the fatigue load was added by an eccentric wheel driven by a variable speed motor capable of doing tests at different fatigue frequencies. Parallel tests were conducted in an air environment in order to make a comparison with the corrosion fatigue results. Testing results were recorded by the replication method to retain the topography during the fatigue courses. Propagation rates of 16Mn pressure vessel steel in both air and H2S solution are compared and analyzed. Remaining life of the 16Mn pressure vessel steel is also estimated.