Protection from hydrogen sulfide corrosion in the recovery and transport of natural gas is done with the use of inhibitors. In this paper the authors present results of an investigation into the resistance of steel to cracking under stress in aqueous solutions of hydrogen sulfide and calcium chloride in the presence of candidate inhibitors. Cold drawn wire of 65G steel was used. All the inhibitors were found to increase the resistance of steel to stress cracking but the degree of their influence on this form of corrosion failure varied. The decrease in their ability to retard stress corrosion cracking was found to be cause by chlorine anions and not by other factors such as the salting-out action of calcium chloride.