Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Failure Analysis of Welded Pipe in Water Supplies for Apartment

  • Published : 2004.04.01
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Abstract

Galvanized Steel pipes have been widely used in industries and apartments, Unexpected early leakage has been found in an apartment. Tunneling corrosion or penetration was found in the water supply pipes. The chemical compositions of the pipes and properties of coating layer were evaluated. The pipes met the specification of KS D 3507. The cause of early failure was analyzed through the examination of macrostructures and microstructures, It was found that the pipes were failed by grooving corrosion, which resulted from galvanic corrosion of weld bead and matrix.

Keywords

References

  1. KS D 3507, 'Carbon Steel Pipes for Ordinary Piping'
  2. C. Kato, Y. Otoguro, S. Kado, and Y. Hisamatsu, Corrosion Science, 18, 61 (1978)
  3. T. Kurisu, T. Kyuno, S. Harada, and T. Doi, Report of Kawasaki Steel, 11(3), p.321-336 (1979)
  4. W. E. Heitman, P. D. Southwick , and F. Pausic, 'ERW Line Pipe; the Effect of Welding and Annealing Upon the Properties, Microstructure and Corrosion Resistance', Conf 1983 HSLA Steel, ASM, p.957-966 (1984)
  5. K. Risch, 'Grooving and Tunnelling Corrosion of Electric Resistance Welded Carbon Steel Tubes' 3R lnt. 27(5), p.360-369 (1988)
  6. J. K. Lee, D. Y. Chang, and D. K. BaeK, J Corros. Sci. of Korea, 22(2), p.142 (1993)
  7. Y. B. Chung, B. W. Lee, and H. S. Kim, Journal of the Corrosion Science Society of Korea, 27, 2 (1998)
  8. Jun Lee, Bulletin of Korea Institute of Metals and Materials, High Strength ERW, 12(4), p463-471 (1999)
  9. The Nalco Water Handbook, p4-1 - 4-23, Nalco Chemical Company, McGraw-Hill Book Company, 1979
  10. Handbook of Welding, p.671, Korea Welding Society, (1998)
  11. Roger Oliphant, Corrosion and Corrosion Control in Drinking Water Systems in the UK, Proceedings from A Corrosion Workshop and Seminar, Oslo, Norway, NACE, 1990