Back
 ENG  Vol.2 No.5 , May 2010
Influence of Clad Metal Chemistry on Stress Corrosion Cracking Behaviour of Stainless Steels Claddings in Chloride Solution
Abstract: The effect of clad metal composition on stress corrosion cracking (SCC) behavior of three types of SMAW filler metals (E308L-16, E309-16 and E316L-16), used for cladding components subjected to highly corrosive conditions, was investigated in boiling 43% MgCl2 solution. In order to evaluate the stress corrosion cracking susceptibility of the top layer, constant load tests and metallographic examinations in tested SCC specimens were conducted. The susceptibility to stress corrosion cracking was evaluated in terms of the time-to-fracture. Results showed that the E309-16 clad metal presented the best SCC resistance. This may be attributed to the presence of a discontinuous delta-ferrite network in the austenitic matrix, which acted as a barrier to cracks propagation. Concerning to E308-16 and E316L-16 clad metals, results showed that these presented a similar SCC test performance. Their higher SCC susceptibility may be attributed to the presence of continuous vermicular delta-ferrite in their microstructure.
Cite this paper: nullE. Correa, R. Barbosa, A. Buschinelli and E. Silva, "Influence of Clad Metal Chemistry on Stress Corrosion Cracking Behaviour of Stainless Steels Claddings in Chloride Solution," Engineering, Vol. 2 No. 5, 2010, pp. 391-396. doi: 10.4236/eng.2010.25051.
References

[1]   O. M. Alyousif and R. Nishimura, “The Stress Corrosion Cracking Behavior of Austenitic Stainless Steels in Boiling Magnesium Chloride Solutions,” Corrosion Science, Vol. 49, No. 7, 2007, pp. 3040-3051.

[2]   ASM Handbook, “Corrosion,” Metals Park, USA, Vol. 13, 1999.

[3]   K. N. Krishnan and K. P. Rao, “Effect of Microstructure on Stress Corrosion Cracking Behaviour of Austenitic Stainless Steel Weld Metals,” Materials Science and Engineering A, Vol. 142, No. 1, 1991, pp. 79-85

[4]   J. C. Lippold and D. J. Kotecki, “Welding Metallurgy and Weldability of Stainless Steel,” 5th Edition, John Willey & Sons, Hoboken, 2005.

[5]   C. D. Lundin, “Dissimilar Metals Welds: Transition Joints Literature Review,” Welding Journal, Vol. 61, No. 2, 1982, pp. 58-63.

[6]   G. Sui, E. A. Charles and J. Congleton, “The Effect of Delta-Ferrite Content on the Stress Corrosion Cracking of Austenitic Stainless Steels in a Sulphate Solution,” Corrosion Science, Vol. 38, No. 5, 1996, pp. 687-703

[7]   H. L. Logan, “Stress Corrosion,” 11th Edition, In.: NACE Basic Corrosion Course. Anton deS. Brasunas, Houston, 1990.

[8]   W. A. Baeslack, W. F. Savage and D. J. Duquette, “Effect of Nitrogen on the Microstructure and Stress Corrosion Cracking of Stainless Weld Metals,” Welding Journal, Vol. 58, No. 3, 1979, pp. 83-90.

[9]   V. Y. Gertsman and S. M. Bruemmer, “Study of Grain Boundary Character along Intergranular Stress Corrosion Crack Paths in Austenitic Alloys,” Acta Mater, Vol. 49, No. 9, 2001, pp. 1589-1598.

 
 
Top