Oil&Gas Damage Mechanisms on Knowledge Library

CO₂ / H₂S Corrosion

Mon, 01 Jan 0001 00:00:00 +0000

General Information

CO₂ corrosion in oil and gas production and transmission systems has been extensively studied over the last decades. The effects of various key parameters, such as temperature, pH, CO2 partial pressure and the presence of H₂S etc., have also been examined and, in many cases, these findings are used to assess and predict system corrosivity. The following chapter provides a general overview of CO₂/H₂S corrosion, the impact of these parameters and corrosion modelling approach.

CO2 Corrosion

Mon, 01 Jan 0001 00:00:00 +0000

General Information

CO₂ corrosion, particularly in oil and gas production / transmission systems, has been extensively studied over the last few decades. The effects of various process parameters, such as temperature, pH, CO₂ partial pressure, and others, have been well examined and, in many cases, incorporated into relevant CO₂ corrosion prediction models. The following chapter provides a general overview of CO₂ corrosion and the impact of these parameters.

Mechanism

Anhydrous CO₂ (dry gas) is considered a non-corrosive. However, in the presence of water, it dissolves and forms weak carbonic acid, which leads to a reduction in pH and subsequent corrosion of carbon steel. The fundamental mechanism of CO₂ corrosion is relatively well understood and has been described by many researchers, including the seminal work of De Waard and Milliams, Crolet, Dugstad and others. ¹ ² ³ ⁴

Sour Corrosion

Mon, 01 Jan 0001 00:00:00 +0000

General Information

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