Electrochemical characteristics of Al-Mg alloy in seawater for leisure ship: Stress corrosion cracking and hydrogen embrittlement

Seong-Jong Kim; Min-Su Han; Seok-Ki Jang

Korean Journal of Chemical Engineering, Vol.26, No.1, 250-257, January, 2009

DOI10.1007/s11814-009-0042-9 Export Citation

Electrochemical characteristics of Al-Mg alloy in seawater for leisure ship: Stress corrosion cracking and hydrogen embrittlement

Seong-Jong Kim^†, Min-Su Han, and Seok-Ki Jang

Division of Marine Engineering, Mokpo Maritime University, 571, Jukgyo-dong, Mokpo-si, Jeonnam 530-729, Korea

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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.

Keywords:Electrochemical Property;Aluminum Alloy;Corrosion;Seawater;Passivity;Cathodic Protection;Potentiostatic Test

[References]

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Kim SJ, Ko JY, Kim JI, International welding/joining conference-2007 (IWJC-Korea 2007), Seoul, Korea (2007)
Kim SJ, Ko JY, International welding/joining conference-2007 (IWJC-Korea 2007), Seoul, Korea (2007)
Kim SJ, Ko JY, Korean Journal of Marine Engineering, 30, 157 (2006)
Kim SJ, Materials Science Forum, 510, 158 (2006)
Kim SJ, Ko JY, Korean J. Chem. Eng., 23(5), 847 (2006)
Cho JH, Korea Research Institute of Medium and Small Shipbuilding, 10(6), (2004)
Sky Al products corporation, Journal of Japan Institute of Light Metals, 41, 544 (2003)
Korea Register, Material and Welding, 2(79), (2004)
Pourbaix M, Atlas of electrochemical equilibria, NACE, 168-176 (1974)
Kim SJ, Ko JY, Han MS, Korean J. Chem. Eng., 23(6), 1028 (2006)
Jang SK, Lee DC, Kim SJ, Jeon JI, Kim SH, Proceedings of Marine Engineering Conference, 139 (2004)
Kim SJ, Moon KM, Metals and Materials International, 8, 395 (2002)
Kim SJ, Moon KM, Metals and Materials International, 8, 387 (2002)
Kim SJ, Okido M, Moon KM, Korean J. Chem. Eng., 20(3), 560 (2003)
Kim SJ, Okido M, Moon KM, Surface and Coatings Technology, 169, 163 (2003)
Moon KM, Lee MH, Kim KJ, Kim SJ, Surface and Coatings Technology, 169, 675 (2003)
Jeon DH, Control of corrosion and protection, 316, Il-Joong publishing Co. (1985)

[1] Kim SJ, Ko JY, International welding/joining conference-2007 (IWJC-Korea 2007), Seoul, Korea (2007)

[2] Kim SJ, Ko JY, Kim JI, International welding/joining conference-2007 (IWJC-Korea 2007), Seoul, Korea (2007)

[3] Kim SJ, Ko JY, International welding/joining conference-2007 (IWJC-Korea 2007), Seoul, Korea (2007)

[4] Kim SJ, Ko JY, Korean Journal of Marine Engineering, 30, 157 (2006)

[5] Kim SJ, Materials Science Forum, 510, 158 (2006)

[6] Kim SJ, Ko JY, Korean J. Chem. Eng., 23(5), 847 (2006)

[7] Cho JH, Korea Research Institute of Medium and Small Shipbuilding, 10(6), (2004)

[8] Sky Al products corporation, Journal of Japan Institute of Light Metals, 41, 544 (2003)

[9] Korea Register, Material and Welding, 2(79), (2004)

[10] Pourbaix M, Atlas of electrochemical equilibria, NACE, 168-176 (1974)

[11] Kim SJ, Ko JY, Han MS, Korean J. Chem. Eng., 23(6), 1028 (2006)

[12] Jang SK, Lee DC, Kim SJ, Jeon JI, Kim SH, Proceedings of Marine Engineering Conference, 139 (2004)

[13] Kim SJ, Moon KM, Metals and Materials International, 8, 395 (2002)

[14] Kim SJ, Moon KM, Metals and Materials International, 8, 387 (2002)

[15] Kim SJ, Okido M, Moon KM, Korean J. Chem. Eng., 20(3), 560 (2003)

[16] Kim SJ, Okido M, Moon KM, Surface and Coatings Technology, 169, 163 (2003)

[17] Moon KM, Lee MH, Kim KJ, Kim SJ, Surface and Coatings Technology, 169, 675 (2003)

[18] Jeon DH, Control of corrosion and protection, 316, Il-Joong publishing Co. (1985)