Processes and systems for predicting corrosion

摘要

Systems and methods for evaluating the corrosion risk in operations with equipment for the handling an acid gas-containing solutes, e.g., an amine unit for the removal of acid gases such as H2S, CO2, etc., are provided. Input parameter values corresponding to geometrical parameters of at least an equipment (or a portion of an equipment) susceptible to corrosion risk, operating parameters, fluid dynamic properties, and properties of the solute are received by the system. Based on the input values, the systems and methods derive a minimum pressure above which acid gas flashing occurs given the localized pressure drop, causing corrosion in the identified location. In one embodiment, the systems and methods provide an assessment correlating acid gas loadings with the corrosion risk.

主权项

1. A method for evaluating corrosion risk in a unit handling an acid gas-containing solute, comprising:
identifying at least a location in the unit for conducting the corrosion risk evaluation; receiving information about geometrical parameters of the location; receiving information about operating parameters, fluid dynamic properties, and properties of the solute in the unit; correlating fluid dynamics of the location in the unit with a shear stress value; predicting a corrosion rate for different acid gas loadings expressed as concentration of the acid gas in the solute responsive to the correlated shear stress; evaluating a localized pressure drop in the location due to the geometrical parameters; correlating a relationship between vapor saturation pressure and temperature data for the different acid gas loadings; identifying from the correlated vapor saturation pressure and temperature data a minimum pressure above which acid gas flashing from the solute occurs given the localized pressure drop, causing corrosion in the identified location.