Electrochemical characteristics of Al-Mg alloy in seawater for leisure ship: Stress corrosion cracking and hydrogen embrittlement |
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Authors: | Seong-Jong Kim Min-Su Han Seok-Ki Jang |
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Affiliation: | (1) Division of Marine Engineering, Mokpo Maritime University, 571, Jukgyo-dong, Mokpo-si, Jeonnam, 530-729, Korea |
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Abstract: | We investigated the mechanical and electrochemical properties of aluminum alloys. Aluminum alloys do not corrode due to the
formation of an anti-corrosive passive film, such as Al2O3 or Al2O3 · 3H2O, which resists corrosion in neutral solutions. In seawater, however, Cl− ions destroy this passive film. The current density in the first passivity range during the application of anodic protection
had a similar value as that for concentration polarization by dissolved oxygen during the application of cathodic protection.
The current density in the first passivity range had the lowest value overall. The lowest current densities in the potentiostatic
and galvanostatic tests occurred at potentials of −1.4 to −0.7 V and −0.9 to −0.7 V, respectively. |
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Keywords: | Electrochemical Property Aluminum Alloy Corrosion Seawater Passivity Cathodic Protection Potentiostatic Test |
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