2016/03/30 by Yoon-Seok Choi, Shokrollah Hassani, Thanh Nam Vu +3
Materials Science · #Corrosion Behavior and Inhibition #Hydrogen embrittlement and corrosion behaviors in metals
paper · doi:10.5006/2026
crossref issued 2016/03/30 · crossref published 2016/03/30 · crossref published-online 2016/03/30 · openalex publication_date 2016/03/30 · crossref created 2016/03/31 · crossref published-print 2016/08/01 · crossref deposited 2025/03/18 · openalex created_date 2025/10/10 · crossref indexed 2026/07/30 · openalex updated_date 2026/07/30
The objective of the present study is to evaluate the corrosion properties of pipeline steels in CO2/H2S/H2O mixtures with different amounts of water (undersaturated and saturated) related to a natural gas transportation pipeline. Corrosion behavior of carbon steel, 1Cr steel, and 3Cr steel was evaluated using an autoclave with different combinations of CO2 partial pressure and temperature (8 MPa/25°C and 12 MPa/80°C) with 200 ppm H2S. The corrosion rate of samples was determined by weight-loss measurements. The surface morphology and the composition of the corrosion product layers were analyzed using surface analytical techniques (scanning electron microscopy and energy dispersive x-ray spectroscopy). Results showed that the corrosion rate of materials in supercritical and liquid phase CO2 saturated with water was very low (<0.01 mm/y). However, adding 200 ppm of H2S to the supercritical and liquid CO2 system caused mild corrosion (<0.5 mm/y). Reducing water content to 100 ppm in the supercritical and liquid CO2 systems with 200 ppm of H2S reduced the corrosion rate to less than 0.01 mm/y.