The stress corrosion cracking (SCC) behavior of AA(1) 7050-T7451 (UNS(2) A97075) aluminum alloy in 3.5 wt% NaCl solution has been studied using slow strain rate tension (SSRT) technique. The effects of strain rate, solution pH, and dissolved oxygen on the SCC behavior of the aluminum alloy has been investigated. The experimental results show that specimen with short transversal orientation is susceptible to SCC at a strain rate of 8.0 × 10−7 s−1. The results also indicate that the SCC resistance of 7050-T7451 alloy in 3.5 wt% NaCl solution decreases with the presence of dissolved oxygen or with increasing the solution acidity.

Subject
Test methods, Strain rate, Metal surfaces, Crack initiation, Acidity, Sodium chloride solution, Dissolved oxygen, Caustic stress corrosion cracking, Aluminum alloys, Alloys, Stress corrosion cracking, Potentiodynamic polarization, Ductility
Keywords:
7075 aluminum alloy, dissolved oxygen, pH, strain rate, stress corrosion cracking
National Association of Corrosion Engineers
1990
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