Corrosion behavior monitoring of saturated carbonate micro droplets on the surface of X52 pipeline steel based on SVET

Abstract

Abstract The CCUS pipeline transportation environment often causes pitting corrosion initiation and expansion of pipeline steel under the action of saturated carbonate micro droplets.In order to monitor the corrosiveness of corrosive micro droplets precipitated from liquid CO2 containing impurities such as water in a dense state on X52 pipeline steel, the scanning vibration electrode technology in micro area electrochemical technology was used to monitor the corrosion potential of micro droplets on the surface of X52 pipeline steel. The surface morphology evolution of micro droplet corrosion products under different corrosion times was analyzed using a 3D profilometer. The results established a structure-activity relationship between corrosion behavior and surface corrosion morphology, innovatively combining electrochemical signals with product structural parameters, and revealing the subtle corrosion process inside CO2 pipelines through simulation methods.