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Effect of Temperature and Concentration of Ammonium Nitrate Solution on the Succeptibility of Mild Steel to Stress Corrosion Cracking
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Journal of Electromagnetic Analysis and Applications·Volume 02 (2010)·Pages 91–97·Published 15 March 2010·DOI10.4236/jemaa.2010.22013
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Abstract
The effect of varying the temperature and the concentration of ammonium nitrate solution on the stress corrosion cracking (SCC) susceptibility of mild steel is studied. An increase in the temperature causes a decrease in the stress corrosion life. It appears that the susceptibility in the range 368 K to 380 K was greater than at other temperatures. Near the boiling point corrosion and stress corrosion occurs, at the boiling point, the cracking was associated with a high rate of general corrosion. Microscopic examination after stress corrosion testing in 10Wt%, 20Wt%, and 52Wt% NH4NO3 solution revealed that in all cases there was severe intergranular attack, especially at the high concentration.
KeywordsStress Corrosion CrackingAmmonium Nitrate SolutionMild SteelConstant Load TestTemperature EffectConcentration Effect
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