Vol. 2, Issue 8 (2015)
Macro-microstructuctural studies of stress corrosion cracking (SCC) of mild steel in simulated environments
Author(s): Ede S.E, Mbah C.N, Edeh H. I
Abstract: Macro-microstructuctural analysis of stress corrosion cracking (SCC) of mild steel in simulated environments has been carried out. Mild steel samples used were all machined and suspended in 1M concentration of H2SO4, HCl, NaOH and distilled H2O. Except for the control samples, each specimen was suspended and tensed to stress values of 126.8, 169.1, 211.4, and 253.6N/m2 for a period of 360 hours. Macrostructural analysis show that corrosion attack on the samples increased with increase in stress values. Microstructurally, crack initiation, development and propagation were observed to increase with increase in stress values for specimens suspended in H2SO4, and HCl environments. Comparatively, specimens suspended in H2SO4 environment are more susceptible to stress corrosion attack than those in HCl. In NaOH and H2O environments, the specimens exhibited little or no stress corrosion attack.