Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Electrochemical Evaluation of Corrosion Properties of Aluminum Alloy as a Sacrificial Anode for Offshore Structure Protection

해양구조물의 방식을 위한 알루미늄 합금의 희생양극적 부식 특성의 전기화학적 평가

  • Rhee, Jin-Ho (Dept. of Materials Science and Engineering, Hongik University) ;
  • Lee, Jae-Ho (Dept. of Materials Science and Engineering, Hongik University)
  • 이진호 (홍익대학교 신소재공학과) ;
  • 이재호 (홍익대학교 신소재공학과)
  • Received : 2015.04.14
  • Accepted : 2015.04.29
  • Published : 2015.04.30
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Abstract

The corrosion behavior of metals and alloys for the safety of offshore structures in seawater was investigated for the application of sacrificial anodes. The experiments were focused on the polarization behaviors and the surface morphology of each metal after experiments. Pure Zn, pure Al (Al1050), Al alloys (Al5052, Al6061), Mg alloys (AZ31, AZ91D) and steel (SCM440) were assessed in 3.5% sodium chloride solution by means of potentiodynamic polarization to verify the galvanic corrosion potential ($E_{couple}$). Potentiostat plots were plotted to compare the surface and corrosion current density ($i_{couple}$) of metals as sacrificial anodes in seawater to protect steel alloy as a cathode. Al alloys showed the best performance as a sacrificial anode, on the other hand, Mg alloys showed overprotection behavior. The surface morphologies of sacrificial anodes were observed by FESEM and compared.

Keywords

References

  1. D. Pinder, "Offshore oil and gas: global resource knowledge and technological change", Ocean Coast. Manage., 44 (2001) 596.
  2. S. K. Chang, "Evaluation of Atmospheric Corrosion for Metals, J. Kor. Inst. Surf. Eng., 30(1) (1997) 73.
  3. W. H. Hartt, "2012 Frank Newman Speller Award: Cathodic Protection of Offshore Structures-History and Current Status", Corrosion, 68(12) (2012) 1063.
  4. S. J. Kim, "Apparatus on Corrosion Protection and Marine Corrosion of Ship", J. Kor. Inst. Surf. Eng., 44(3) (2011) 106.
  5. D. A. Jones, "Principles and Prevention of Corrosion", 2nd ed, Prentice-Hall (1996)
  6. X. G. Zhang, "Galvanic Corrosion of Zinc and Its Alloys", J. Electrochem. Soc., 143(4) (1996) 1482.
  7. J. R. Wellington, "The Low Potential Zinc Anode In Theory and Application", Corrosion, 17(11) (1961) 127.
  8. C. Rousseau, F. Baraud, L. Leleyter, and O. Gil, "Cathodic protection by zinc sacrificial anodes: Impact on marine sediment metallic contamination", J. Hazard. Mater., 167 (2009) 958.
  9. M. Narozny, K. Zakowski, and K. Darowicki, "Method of sacrificial anode transistor-driving in cathodic protection system", Corros. Sci., 88 (2014) 279.
  10. S. M. A. Shibli, B. Jabeera, and R. Manu, "Development of high performance aluminum alloy sacrificial anodes reinforced with metal oxides", Matt. Lett., 61 (2007) 3000. https://doi.org/10.1016/j.matlet.2006.10.062
  11. T. M. Tsai, "Protection o steel using aluminum sacrificial anodes in artificial seawater", J. Marine Sci. Tech., 4(1) (1996) 20.
  12. J. Ma, and J. Wen, "Corrosion analysis of Al-Zn- In-Mg-Ti-Mn sacrificial anode alloy", J. Alloy. Compd., 496 (2010) 115.
  13. J. Genesca, and J. Juarez, "Development and testing of galvanic anodes for cathodic protection", Contrib. Sci., 1(3) (2000) 341.
  14. K. A. Esaklul and T. M. Ahmed, "Prevention of failures of high strength fasteners in use in offshore and subsea applications", Eng. Fail. Anal., 16(4) (2009) 1200.

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