Print
2002 №04 (04) 2002 №04 (06)

The Paton Welding Journal 2002 #04
The Paton Welding Journal, 2002, #4, 21-23 pages

Effect of deformation on electrochemical heterogeneity of pipeline welded joints

A.I. Radkevich

G.V. Karpenko Physico-Mcchanical Institute, NASU, Lviv, Ukraine

Abstract
Electrode potentials have been measured in various zones of a circumferential welded joint on low-carbon steel pipes at different levels of loading using internal pressure. It is shown that plastic deformation eliminates completely the difference of potentials between the parent metal and HAZ of the welded joint.
Keywords: welded joints, pipelines, internal pressure, deformation, electrochemical heterogeneity

References

1. Karpenko, O.V., Vasilenko, 1.1. (1971) Corrosion cracking of steels. Kyiv: Tekhnika.
2. Vasilenko, 1.1., Mclckhov, R.K. (1977) Corrosion cracking of steels. Kyiv: Naukova Dumka.
3. Polyakov, S.G., Goncharov, A.B., Onoprienko, L.M. et al. (1992) Influence of electrochemical heterogeneity of titanium-zirconium welded joint on its corrosion resistance. Zashchita Metallov, 6, 898−903.
4. Azhogin, F.F. (1974) Stress-corrosion cracking and protection of high-strength steels. Moscow: Metallurgiya.
5. Gutman, E.M. (1974) Mechanochemistry of metals and corrosion protection. Moscow: Metallurgiya.
6. Steklov, O.I. (1990) Resistance of materials and structures to stress corrosion. Moscow: Mashinostroenic.
7. Makhnenko, V.I. (1976) Computational methods of study of kinetics of welding stresses and strains. Kyiv: Naukova Dumka.
8. Makhnenko, V.I., Makhnenko, O.V. (2000) Development of calculation procedures for assessment of allowable defects in welded joints of critical structures. The Paton Welding J., 9/10, 79−87.
9. Ivantsov, O.M. (1985) Reliability of main pipelines. Moscow: Nedra.
10. Gossler, X. (1987) Hydrotest of pipeline laved by method of pressure loading above yield stress. In: Proc, of 9th Soviet-German Symp. on Problems of Manufacturing of Large-Diameter Tubes. Moscow.
11. Karpenko, G.V., Zamostyanik, EE., Babej, Yu.I. et al. (1969) Determination of stresses in microvolumes of metal with aid of electrode potential. Fiziko-Khim. Mekhanika Materialov, 5, 535−536.
12. Karpenko, G.V., Zamostyanik, I.E., Gutman, E.M. et al. (1970) Microelectrochemical heterogeneity of low-carbon steel with non-mctallic inclusions. Ibid., 1, 3−6.
13. Rabinovich, V.A. (1985) Thermodynamic activity of ions in electrolyte solutions. Leningrad: Khimiya.

Suggested Citation

A.I. Radkevich (2002) Effect of deformation on electrochemical heterogeneity of pipeline welded joints. The Paton Welding J., 04, 21-23.