Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
권호 표지
DOI QR코드

DOI QR Code

Study on the Effects of Flows on the Acceleration of the Grooving Corrosion in the ERW Pipe

ERW강관에서 홈부식의 가속화에 미치는 유동의 영향에 관한 연구

  • Kim, Jae-Seong (Dept. of Aerospace and Mechanical Engineering, Korea Aerospace University) ;
  • Kim, Yong (Center for Robot & Manufacturing, Institute for Advanced Eng.) ;
  • Lee, Bo-Young (Dept. of Aerospace and Mechanical Engineering, Korea Aerospace University)
  • 김재성 (한국항공대학교 항공우주 및 기계공학과 대학원) ;
  • 김용 (고등기술연구원 로봇생산기술센터) ;
  • 이보영 (한국항공대학교 항공우주 및 기계공학부)
  • Published : 2008.08.31
Download PDF
⟨ Previous Next ⟩

Abstract

The grooving corrosion is caused mainly by the different microstructures between the matrix and weld which is formed during the rapid heating and cooling cycle in welding. By this localized corrosion reaction of pipes, it evolves economic problems such as the early damage of industrial facilities and pipe lines of apartment, and water pollution. So lots of researches were carried out already about grooving corrosion mechanism of ERW carbon steel pipe but there is seldom study for water hammer happened by fluid phenomenon and corrosion rate by flow velocity. In this study, the analysis based on hydrodynamic and fracture mechanics was carried out. ANSYS, FLUENT and STAR-CD were used for confirmation of flow phenomenon and stress on the pipe. As the results, fatigue failure is able to be happened by water hammer and grooving corrosion rate is increased cause by turbulent. Grooving corrosion is happened on the pipe, then friction loss of fluid is occurred from corroded part. Erosion can be happened enough in corroded region of microscopic size that wear "V" form. Also pipe is able to be damaged by water hammer effects because of corroded region is general acting as a notch effects. Corrosion depth was more than half of total thickness, it can be damaged from water hammer pressure.

Keywords

References

  1. Y.S. Kim : High Frequency Electrical Resistance Welding of Pipes, KWJS journal 16-5(1998), 45-47 (in Korean)
  2. C. Kato, Y. Otoguro, S. Kado : Grooving in ERW Pipes in Sea Water, Proc. 6th international congr (1976). Metallic Corrosion, Sydney, Austral, 1104
  3. T. Kurisu, T. Kyuno, S. Harada, T. Doi : Effects of Various Factors, Mechanisms and Preventive Method of Grooving Corrosion of ERW and CBW Carbon Steel Pipes, Kawasaki steel Tech Report(1979). 321- 336
  4. Hyun Dong Lee, Won Sik Jeong, Jung Hun Park, Chul Ho Bea, Pil Jea Kwak : Korea Society of Water Quility, 17-5(2001), 627-635.(in Korean)
  5. Hee jun Sung, Heong Sik Kim, Byung Woo Lee, Young Bok Jeong, Kwang Hak Lee, Do Soo Seo : Corrosion Seience Soc. of Korea, 27-2(1998), 122- 136(in Korean)
  6. E. T r eiss : Double Inductiv e Annealing of the Weld Area, 3R International, 20(1981) 627
  7. J.A. Wharton, R.J.K. Wood : Influence of flow conditions on the corrosion of AISI 304L stainless steel, wear Eng., 256(2004), 525-536 https://doi.org/10.1016/S0043-1648(03)00562-3
  8. R.W. Fox, A.T. McDonald : Introduction to fluid mechanics, 4th edition(1994), 35-44, 406-413
  9. J.F. Douglas, J.M. Gasiorek, J.A. Swaffield : Fluid Mechanics, 3rd edition, Longman Scientific & Technical, London(1995), 300
  10. D.J. Tritton : Physical Fluid Dynamics. 2nd ed., Clarendon Press. Oxford.(1992), 285
  11. B.J. Cantwell : Organized notion in turbulent flow, Annu. Rev., Fluid Mech. 13(1981), 457-515 https://doi.org/10.1146/annurev.fl.13.010181.002325
  12. S.K. Robinson : Coherent motions in the turbulent layer, Annu. Rev. Fluid Motion 23(1991), 601-639 https://doi.org/10.1146/annurev.fl.23.010191.003125
  13. Wylie. E. B. and Streeter, V. L. : Fluid Transients. McGraw-Hill(1978), 244-247
  14. ASSE Standard No. 1010 : Water Hammer Arresters
  15. Bernard J. Hamrock, Bo Jacobson, Steven R. Schmid : Fundamentals of Machine Elements, McGraw Hill (1999), 237-239
  16. D.A. Jones : Corrosion Processes, R.N. Parkins, ed., Applied Science(1982), 176-178
  17. Yong Kim, Bo-Young Lee : A study on Grooving corrosion at the weld of a low carbon steel pipe made by Electrical Resistance Welding, KWJS journal 22-5(2004), 58-64(in Korean)
  18. Joung Hyun Suh : A study on the characteristics of Heat treated ERW weld seam and the technology of seam Annealing, KWJS journal 17-1(1999), 133- 144(in Korean)