양극산화된 5083-H321 합금의 천연해수 내 전기화학적 부식 및 응력부식균열 특성에 관한 연구
Investigation on Electrochemical Corrosion and Stress Corrosion Cracking Characteristics of Anodized 5083-H321 Alloy in Natural Seawater
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Many studies have been conducted to improve the corrosion resistance and durability of various aluminumalloys through the anodizing technique. It is already used as a unique technique for enhancing the propertiesof aluminum alloys in various industries. This paper investigated the electrochemical corrosion and stresscorrosion cracking characteristics of anodized aluminum 5083-H321 alloy in natural seawater. The corrosioncharacteristics were assessed by the electrochemical technique and potentiodynamic polarization test. Thestress corrosion cracking characteristic was evaluated with a slow strain rate tensile test under 0.005 mm/minrate, which showed that the hard anodizing film had a thickness of about 16.8 μm. Although no significantcharacteristics of stress corrosion cracking were observed in the slow strain rate test, the anodized specimenpresented excellent corrosion resistance. The corrosion current density was measured to be approximately4.2 times lower than that of the base material, and no surface damage was observed in the anodic polarizationtest.
Abstract
Many studies have been conducted to improve the corrosion resistance and durability of various aluminumalloys through the anodizing technique. It is already used as a unique technique for enhancing the propertiesof aluminum alloys in various industries. This paper investigated the electrochemical corrosion and stresscorrosion cracking characteristics of anodized aluminum 5083-H321 alloy in natural seawater. The corrosioncharacteristics were assessed by the electrochemical technique and potentiodynamic polarization test. Thestress corrosion cracking characteristic was evaluated with a slow strain rate tensile test under 0.005 mm/minrate, which showed that the hard anodizing film had a thickness of about 16.8 μm. Although no significantcharacteristics of stress corrosion cracking were observed in the slow strain rate test, the anodized specimenpresented excellent corrosion resistance. The corrosion current density was measured to be approximately4.2 times lower than that of the base material, and no surface damage was observed in the anodic polarizationtest.
참고문헌 (15)
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