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Low Cr (3 to 5%) bearing steels have been developed and used in CO2 environment as materials to meet "Fitness for Purpose". However, the SSC and SCC resistance of low Cr bearing steel have not been clarified. This paper presents the effect of carbon content, microstructure, and tempering temperature on the SSC and SCC resistance as well as CO2 corrosion resistance of low Cr steel (3%Cr steel).
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This paper reviews the effect of low molecular weight organic acids ( acetic, propionic, butyric) on corrosion rates in the presence of CO2. The effect of the mineral content of the produced water is also discussed. Laboratory methods for determining the concentration of low concentrations of organic acids are discussed. Laboratory and field data are presented.
The literature has been reviewed with respect to information gained in the recent 20 years on CO2 corrosion of materials used in the oil and gas industry. The paper discusses the effect of materials related, medium-related and interface-related parameters on general (uniform) and localized corrosion. Part II
An elbow leak was encountered after 3 years of operation of a carbon steel flow line from an artificial lift (rod pump) well. Methods for prevention of similar failure are discussed in terms of design and inhibition.
A methodology was developed to identify and choose the most cost-effective material and also appropriate remedial corrosion inhibition and protection methods by using 4 reputable corrosion prediction models in dry and wet oil & gas pipeline containing CO2 with and without H2S.
The principal objective of this work is to investigate and understand the TLC inhibition mechanism in the presence of diethylamine (DEA) and morpholine. In order to determine possible interactions between the tested amines and the steel surface, the surface charge was investigated by determining the potential of zero charge (PZC).
Longitudinally welded linepipe can be more susceptible to localized corrosion than seamless linepipe due to chemical composition gradients between the weld and base metal, resulting in galvanic attack.
This paper describes corrosion inhibitor tests that were carried out at different temperatures and interpreted using Langmuir adsorption and desorption.
Corrosion behavior of 3Cr steel in CO2-O2 aqueous environment containing silty sand w/different sizes was investigated by immersion tests & electrochemical measurements. Results showed corrosion rate & morphology of 3Cr steel were affected by the size of silty sand.
Three brands of oil-soluble water-dispersible inhibitors were evaluated with the rotating cage autoclave (RCA). Some inhibitors showed enough efficiency at high rotating speed but the others require more dosage to maintain the same result.
A comprehensive parametric study was performed using a small-scale laboratory setup with the aim of investigating the occurrence of localized corrosion of mild steel in marginally sour environments.