Stress corrosion cracking active path mechanisms

To conclude, it is observed that in mechanisms based on a pre-existing active path, the susceptibility to SCC at one end is predominantly controlled by localized corrosion where stress is not necessary, such as carbon, steel in NO, and Al-Zn-Mg in Cl , brass in NH3 solution, to the other limit where the stress influences the propagation of a crack from an intergranular notch, such as in Mg-Al alloys in CrOJ, C1 and high strength steel in water. 

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