Evaluation of Electrochemical Characteristics for Casted AC7AV Aluminum Alloy

Abstract:

The Al alloy is environmental friendly, easy to recycle, and provides a high added value to fishing boats. Aluminum alloy do not corrode due to the formation of an anticorrosive passive film, such as Al₂O₃ or Al₂O₃3H₂O, which resists corrosion in neutral solution. In seawater, however, Cl^- ions destroy this passive film. We investigated on several electrochemical tests undertaken to determine the optimum conditions in seawater for corrosion protection of casted AC7AV aluminum alloy. The components of casted AC7AV aluminum alloy are similar with Al-Mg alloys (5xxx series) which are used for ship. Result of electochemical experiment, the optimum protection potential range with regards to hydrogen embrittlement and stress corrosion cracking was determined to lie between-1.3 and-0.7 V(vs Ag/AgCl).

• Periodical: Advanced Materials Research (Volume 811)
• Pages: 54-60
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.811.54
• Online since: September 2013
• Authors: Seong Jong Kim, Jae Cheul Park, Seok Ki Jang
• Keywords: Casted AC7AV Al Alloy, Concentration Polarization due to Dissolved Oxygen Reduction, Electrochemical Characteristics, Optimum Corrosion Protection Potential

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