Corrosion experience of 13%Cr stainless steel injection well tubing in natural gas dissolved in brine field

Abstract

Significant localized corrosion occurred on injection well 13%Cr stainless steel tubing in the field the natural gas is being dissolved in brine. Maximum corrosion rate of 13%Cr stainless steel was 2.1 mm/y. High concentration of sulfur element was detected on corrosion products by X-ray fluorescence analysis. Main cause of this corrosion was considered CO₂ corrosion and microbiologically influenced corrosion. The corrosion was not reproduced by laboratory tests using CO₂. Sulfuric acid was considered one of the causes of corrosion added for pH control in iodine extraction process.