Sour Service Oil Production, Refinery
Hydrogen Sulphide Stress Corrosion
VISTAR® is qualified to NACE MR0175/ISO15156-3 (2009) under Annex A by composition and under Annex B by specific testing as a result of which, the allowable environmental limits are extended to 150 ºC, 700 kPa pp H2S, 13,800 kPa pp CO2 and 90,000 mg/l Cl-ion concentration.
High Temperature Pitting and Crevice Corrosion in Sour Environments
Temperature 150 ºC; environment 15% NaCl saturated with an H2S/CO2 gas mixture; sample configuration; flat coupons with castellated washers, test duration 720 hours; no measurable weight loss.
