抄録
Microbiologically Influenced Corrosion (MIC) is considered to play important roles on the corrosion of 13%Cr stainless steel injection tubing in a natural gas dissolved in brine field. The main cause of this MIC was considered to be mainly caused by Sulfate Reducing Bacteria (SRB) from the result of elemental analysis of corrosion products, immersion test and SRB culture in the actual plant. The SRB was activated by the addition of sulfuric acid used for pH control in the iodine extraction process. Changing the pH control agent to hydrochloric acid from sulfuric acid properly alleviated this MIC problem.
