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Critical Pitting Potential And Stress Corrosion Cracking Of Aluminum Alloy In Chloride Media

When a metallic surface is not protected, it will suffer uniform corrosion. However, when the material forms a passive film, the uniform corrosion is replaced by localized corrosion, which is more dangerous, which results from the breakdown of the passive film. Under loading the localized corrosion or pitting can lead to stress corrosion cracking (SCC) and corrosion fatigue (CF). Transition from pitting attack to SCC has been noted in the literature for aluminum and its alloy as they fall into this class material that are thus susceptible to the SCC and CF phenomena, however, the mechanism for this transition is not well understood.