LAUSR

This work proposes a methodology for the study of the physical and chemical effects of the materials used in the petrochemical industry, specifically ASTM A335 P92 steel. This methodology includes stages such as: selection of atmospheres and determining variables, experiment design, preliminary tests and experiment calibrations, manufacture of corrosion coupons, experimentation of the material with the different environments, kinetic study, characterization of the material by means metallographic analysis, of hardness and micro-hardness, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction analysis (XRD), X-ray photoelectron spectroscopy (XPS) and finally discussion of results. This paper studies four corrosion phenomena at high temperatures: oxidation, nitridation, carburization and water vapor effect. Within the working conditions, five exposure times (1, 20, 50, 100 and 200 h) and four service temperatures (450, 550, 650 and 750 °C) were selected.