A Hydrogen Effusion Method for the Determination of Corrosion Rates in Aqueous Systems at Elevated Temperature and Pressure

Abstract

This paper analyzes the limitations of weight change techniques at elevated temperature and pressure, and presents a description of a new technique based on the measurement of the hydrogen generated by the corrosion reaction. This H, which diffuses through the walls of a test specimen containing the aqueous solution, is collected and measured in a vacuum system of known volume which surrounds the test specimen; the corrosion rate is calculated from the hydrogen effusion rate. Results obtained with the technique show good reproducibility and compare well with results obtained by an independent method.