Influence of annealing heat treatment on pitting corrosion resistance of stainless steel type 316

Authors

  • Amirreza Bakhtiari
  • I. Berenjani

DOI:

https://doi.org/10.5937/metmateng1402097B

Keywords:

stainless steel 316L, annealing heat treatment, σ-phase, Tafel polarization, pitting resistance, CPT

Abstract

The effect of annealing heat treatment on pitting resistance of stainless steel type 316L has been studied using Tafel polarization and ASTM G150 for estimating of the pitting potential and CPT, respectively. The materials were tested in 3.5% NaCl solution. The chemical composition of the material was analyzed via optical emission spectrometry. It was found that the sample treated at 940 °C shows better pitting corrosion resistance than samples treated at 520 °C and 820 °C. The treatment at 940 °C produced two types of morphologies, austenitic-ferritic matrix with δ-ferrite and only small amount of the σ phase. In the range up to 820 °C the σ phase embedded in the γ phase matrix and at δ/γ interface was causing brittleness of the material and aggravated corrosion resistance. The treatment at 940 °C produced the microstructure which prevented the corrosion attack to develop. It was revealed that the pitting size in samples treated at 520 °C and 820 °C is greater than that at 940 °C. In addition, depth of pitting has been considered as a factor of pitting corrosion resistance. The depth of pitting in sample treated at 940 °C is low since the pitting is almost superficial, while the pitting size in samples treated in 520 °C and 820 °C is higher and deeper.

 

http://dx.doi.org/10.5937/metmateng1402097B

References

Y. Maehara, Y. Ohmori, J. Murayama, N. Fujino, T. Kunitake, Met. Sci 17 (1983) 541-547.

Alonso, N. Análise do método potenciodinâmico de determinação do potencial de pite. Doctoral Thesis (Materials Science and Engineering) — scola Politécnica da Universidade de São Paulo — USP — São Paulo, 1992.

SB. Kim, KW. Paik, YG. Kim, Mater. Sci. Eng A247 (1998) 67-74.

R. Guo, and M.B. Ives, Corrosion, 46,125,1990, NACE

E. Blasco-Tamarit, A. Igual-Muñoz, J. García Antón, D. García-García, Corros. Sci 50 (2008) 1848-1857.

R.M. Carranza, M.G. Alvarez, Corros. Sci 38 (1996) 909-925.

S. Niknafs, In-situ studies of delta-ferrite/austenite phase transformation in low carbon steels, Master of engineering by research Thesis, University of Wollongon, Australia (2007).

I. Berenjani, Investigation of corrosion behavior of austenitic welded stainless steel, M.Sc Thesis, Isfahan University of Technology, Iran (2009).

R.E. Reed-Hill, Physical metallurgy principles, second ed., D. Vannostrand company, New York, 1991.

D.A. Porter, K.E. Easterling, Phase transformation in metals and alloys, second ed., Chapman & Hall, New York, 1992.

T. Mathiesen, J. V. Hansen, In: Duplex World 2010 Conference: Beaune, France, October 2010.

Hua Tan, Yiming Jiang, Bo Deng, Tao Sun, Jin Li, Mater. Charact 60 (2009) 1049-1054.

Z. Szklarska-Smialowska, Corros. Sci 44 (2002) 1143-1149.

Downloads

Published

2014-07-30

How to Cite

Bakhtiari, Amirreza, and I. Berenjani. 2014. “Influence of Annealing Heat Treatment on Pitting Corrosion Resistance of Stainless Steel Type 316”. Metallurgical and Materials Engineering 20 (2):97-106. https://doi.org/10.5937/metmateng1402097B.

Issue

Vol. 20 No. 2 (2014)

Section

Articles - archived

License

Copyright (c) 2014 Metallurgical and Materials Engineering

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

Authors who publish with this journal agree to the following terms:

  • Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this journal.
  • Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal.
  • Authors are permitted and encouraged to post their published articles online (e.g., in institutional repositories or on their website, social networks like ResearchGate or Academia), as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access).

 

Creative Commons License
Except where otherwise noted, the content on this site is licensed under a Creative Commons Attribution 4.0 International License.