Corrosion tests were conducted in a gas-separation tower of a H2S abatement system at Hellisheioi power plant in Iceland. The susceptibility to uniform corrosion and environmentally assisted cracking of several materials were investigated, including the main construction material of the abatement system i.e., the austenitic stainless steel UNS S31603. The results show that the UNS 531603 and UNS S31803 showed no signs of corrosion damage while UNS 530403 experienced environmentally assisted cracking most likely in the form of stress corrosion cracking. The carbon steel S235JR tested was severely damaged by hydrogen induced cracking, and uniform corrosion.