Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
권호 표지
DOI QR코드

DOI QR Code

Electrochemical Damage Characteristics of Anodized 5083 Aluminum Alloy with Flow Rate in Seawater

양극산화 처리된 5083 알루미늄 합금의 해수 내 유속변화에 따른 전기화학적 손상 특성

  • Park, Il-Cho (Division of Marine Engineering, Mokpo National Maritime University) ;
  • Kim, Seong-Jong (Division of Marine Engineering, Mokpo National Maritime University)
  • 박일초 (목포해양대학교 기관시스템공학부) ;
  • 김성종 (목포해양대학교 기관시스템공학부)
  • Received : 2016.08.17
  • Accepted : 2016.08.29
  • Published : 2016.08.31
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, electrochemical damage behaviors with flow rate were investigated for anodized 5083 aluminum alloy in seawater. As the results of anodic polarization experiments and potentiostatic experiments at +1.0 V (vs. SSCE), the non-flow condition presented largely damaged surface resulting from a tendency of local pitting damage. Under various flow rate conditions, however, less surface damages under the application of anodic potential was obtained which is attributed to no accumulation of $H^+$ and $Cl^-$ ions on the surface. On the other hand, the results of the potentiostatic experiments at -1.0 V (vs. SSCE) with flow rate showed that anodized 5083 aluminum alloys could achieve the effective cathodic protection by low cathodic protection current density less than $2.61{\times}10^{-7}A/cm^2$ even under high flow rate of 1 m/s.

Keywords

References

  1. Y. W. Jo, Y. J. Kim, J. H. Yeo, S. G. Lee, Y. G. Kim, Fabrication and Characterization of AAO Template with Variation of the Phosphoric Acid Amount of the Etching Solution, J. KIEEME, 27 (2014) 448-451.
  2. S. J. Lee, J. H. Lee, S. J. Kim, Effect of Solution Temperature for Al Alloy Anodizing on Cavitation Characteristics, Corros. Eng. Sic. Techn., 14 (2015) 140-146. https://doi.org/10.14773/cst.2015.14.3.140
  3. S. M. Moon, Y. K. Nam, C. N. Yang, Y. S. Jeong, Formation of Anodic Oxide Films on As- Cast and Machined Surfaces of Al-Si-Cu Casting Alloy, J. Kor. Inst. Surf. Eng., 42 (2009) 260-266. https://doi.org/10.5695/JKISE.2009.42.6.260
  4. I. J. Son, Effect of Equal Channel Angular Pressing on the Pitting Corrosion Resistance of Hard Anodized Al5052 Alloy, J. Kor. Inst. Surf. Eng., 48 (2015) 142-148. https://doi.org/10.5695/JKISE.2015.48.4.142
  5. S. M. Moon, C. N. Yang, S. J. Na, Formation Behavior of Anodic Oxide Films on Al7075 Alloy in Sulfuric Acid Solution, J. Kor. Inst. Surf. Eng., 47 (2014) 155-161. https://doi.org/10.5695/JKISE.2014.47.4.155
  6. I. H. Chang, D. Y. Jung, J. S. Gook, Corrosion Characteristics of the Sulfuric Acid Anodized Film Formed on Al6070 Alloy in Nitric Acid Vapor Environment, J. Kor. Inst. Surf. Eng., 45 (2012) 198-205. https://doi.org/10.5695/JKISE.2012.45.5.198
  7. S. Y. Kang, D. W. Lee, Study on Improvement of Corrosion Resistance and Wear Resistance by Anodizing and Sealing Treatment with Nano- Diamond Powder on Aluminum, J. Kor. Inst. Surf. Eng., 47 (2014) 116-120. https://doi.org/10.5695/JKISE.2014.47.3.116
  8. J. Y. Wang, C. LI, S. L. Zheng, C. Y. Yin, Y. H. Wang, Growth and Corrosion Behaviors of Thin Anodic Alumina Membrane on AA5083 Al−Mg Alloy in Incalescent Medium, Trans. Nonferrous Met. Soc. China, 24 (2014) 3023−3030. https://doi.org/10.1016/S1003-6326(14)63440-3
  9. Y. H. Yin, T. Liu, S. A. Chen, T. Liu, S. Cheng, Structure Stability and Corrosion Inhibition of Super-Hydrophobic Film on Aluminum in Seawater, Appl. Surf. Sci., 255 (2008) 2978-2984. https://doi.org/10.1016/j.apsusc.2008.08.088
  10. T. He, Y. C. Wang, Y. J. Zhang, Q. Lv, T. Xu, T. Liu, Super-Hydrophobic Surface Treatment as Corrosion Protection for Aluminum in Seawater, Corros. Sci., 51 (2009) 1757-1761. https://doi.org/10.1016/j.corsci.2009.04.027
  11. C. Y. Jeong, J. H. Lee, K. Sheppard, C. H. Choi, Air-Impregnated Nanoporous Anodic Aluminum Oxide Layers for Enhancing the Corrosion Resistance of Aluminum, Langmuir, 31 (2015) 11040-11050. https://doi.org/10.1021/acs.langmuir.5b02392
  12. D. S. Won, C. H. Hwang, Y. S. Park, J. C. Kim, Effects of Velocity, Turbidity, Galvanic Coupling and Cathodic Protection on the Erosion-Corrosion Resistances of Cu Alloys, Ti, Cast Iron, Stainless in Synthetic Seawater, Corros. Sci. Tech., 13 (1990) 24-32.
  13. S. J. Lee, M. S. Han, S. K. Jang, S. J. Kim, Effect of Flow Velocity on Corrosion Rate and Corrosion Protection Current of Marine Material, Corros. Sci. Tech., 14 (2015) 226-231. https://doi.org/10.14773/cst.2015.14.5.226
  14. E. W. Jakson, Aluminium vs Corrosion by Water, Chem. Process Eng. Inz., 38 (1957) 391-393.
  15. C. Vargel, Corrosion of Aluminium, 1st ed., Elsevier, PARIS, (2004) 320-321.
  16. G. A. Gehring, M. H. Peterson, Corrosion of 5456-H117 Aluminum in High Velocity Seawater, Corrosion, 37 (1981) 232-242. https://doi.org/10.5006/1.3577276
  17. J. F. Whiting, T. E. Wright, Cathodic Protection for an Uncoated Aluminum Pipeline, Corrosion, 17 (1961) 9.