Product Summary

The Need for Corrosion-Resistant Alloys in CO₂ Injection Wells for CCS and CCUS Projects

CCS and CCUS projects continue to develop as an effective method to reduce anthropogenic CO₂ emissions. Injection wells for these projects are often required to retain integrity over long operational lives, sometimes 50 years or longer. When it is determined from process conditions that free water may or will be present, either condensing from the CO₂ injectate itself or because of injection into a water-bearing formation, a corrosion-resistant alloy (CRA) is required to ensure sufficiently long service life. For well designers and operators, there is a growing need for comprehensive guidelines for the selection of suitable CRAs. This paper summarizes important parameters that need to be considered for general materials selection based on available data. A more detailed and complete review is provided in the PCOR Partnership's Guideline for the Selection and Use of Corrosion-Resistant Alloys in CCS and CCUS Projects. Because of the limited public information available on the use of CRA materials with CO₂ streams containing impurities in saline environments, it is anticipated that the information presented in this document will be updated or refined as more information and test data become available in the future.