Stress Corrosion Cracking of Copper-Manganese Alloys-Effect of Some Chemical Variables

Abstract

Copper-manganese alloys, like a few other copper alloys, exhibit stress corrosion cracking in ammonia atmosphere, also they give cracking in Mattosson's solution which is a solution of copper sulphate, ammonium sulphate and ammo-nium hydroxide. Four compositions of copper-manganese alloys in their homogenous solid solution range, conta-ining 8 to 23 percent manganese, have been tested under varying conditions of Mattsson's solution in respect of PH and copper content for an assessment of the effect of these variables on the stress corrosion behaviour of these alloys.