Research Progress on High Pressure Erosion-Corrosion of Pipeline Steels in CO₂ Environment

Abstract

Multiple flow erosion-corrosion under high pressure environment is a key problem for safe operation of oil gas gathering and transporting pipelines. For the high pressure erosion-corrosion failure problem of the gathering and transporting pipeline in CO2 environment, the high pressure erosion-corrosion apparatuses of gathering and transportation pipeline in CO2 environment were elaborated, mainly including high pressure jet impingement system, high pressure rotor rotating system and high pressure loop test system. The mechanism of high pressure erosion-corrosion was reviewed, and it was pointed out that erosion-corrosion was controlled by electrochemical corrosion and erosion wear. Besides, the effects of factors such as flow rate, velocity of solid particles, size of solid particles, temperature, pH value, and CO2 partial pressure on high pressure erosion-corrosion were summarized. Finally, the development direction of high pressure erosion-corrosion study of the gathering and transporting pipeline in CO2 environment were prospected.

Keywords

• pipeline steel|co₂ corrosion|high pressure|erosion