Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Prevention of Crevice Corrosion of STS 304 Stainless Steel by a Mg-alloy Galvanic Anode

  • Lim, U.J. (School of Mechanical Engineering, Pukyong Univ.) ;
  • Yun, B.D. (Graduate School, Department of Mechanical Engineering, Pukyong Univ.) ;
  • Kim, J.J. (Materials Evaluation Center, Korea Research Institute of Standards and Science)
  • Published : 2006.06.01
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Abstract

Prevention of crevice corrosion was studied for STS 304 stainless steel using a Mg-alloy galvanic anode in solutions with various specific resistivity. The crevice corrosion and corrosion protection characteristics of the steel was investigated by the electrochemical polarization and galvanic corrosion tests. Experimental results show that the crevice corrosion of STS 304 stainless steel does not occur in solutions of high specific resistivity, but it occurs in solutions of low specific resistivity like in solutions with resistivities of 30, 60 and $115{\Omega}{\cdot}m$. With decreasing specific resistivity of the solution, the electrode potential of STS 304 stainless steel in the crevice is lowered. The potential of STS 304 stainless steel in the crevice after coupling is cathodically polarized more by decreasing specific resistivity indicating that the crevice corrosion of STS 304 stainless steel is prevented by the Mg-alloy galvanic anode.

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References

  1. Y. H. Lee, 'Corrosion and protection data book', KICAT, p. 153 (1997)
  2. Hisashi hashimoto, 'Examples of corrosion and protection hot water tank', boiler 266, 49 (1994)
  3. Denny A. Jones, Principles and prevention of corrosion, Macmillan Publishing Co., p. 118 (1996)
  4. O. Ito, 'Corrosion and protection', Owna Co., Japan, p.180 (1986)
  5. W. S. Tait, 'An introduction to electrochemical corrosion testing for practicing engineers and scientists', p. 65 (1994)
  6. S. Yoshizawa, K. Yamakawa, and A. Katagiri, 'An introduction to corrosion and protection of metals', p. 97 (1989)
  7. D. H. Jeon, 'Practical corrosion protection engineering', Taehwa Co., p. 106 (1990)