Influence of the Cation on the Mode of Stress-Corrosion Failure of Iron In Nitrate Solutionsc

The nature of attack on unstressed iron and the mode of cracking in stressed iron during immersion in boiling Ca(NO3)2, NaNO3, NH4NO3 solutions and various mixed Ca2+ and NH4+ solutions have been followed by microscopic examination of specimens removed from the solutions at various fractions of the mean failure time and by stress-corrosion tests.Only NH4NO3 gives rise to intergranular trenching in the absence of stress, and this ability,...