5th International Conference on Materials Engineering and Metallurgy , 2016-11-08

Title : ( The Effect of Halide Anions on the Pitting Corrosion of 316 Austenitic Stainless Steel )

Authors: Sohrab Pahlavan , Mohammad Hadi Moayed , Mostafa Mirjalili ,

Access to full-text not allowed by authors

Citation: BibTeX | EndNote

This work aims to examine the effect of different halide anions on the pitting corrosion of 316 austenitic stainless steel. Investigated halide anions are chloride, bromide and iodide. Stable pitting was investigated by means of potentiodynamic experiments. Metastable pitting characteristics were also evaluated by using potentiostatic experiments. Initiation and propagation steps of pitting were then compared according to the obtained results. The results confirmed that the aggressivity of halides increases in the following order: Cl->Br->I-. In the other word, for a constant concentration, the pitting potential of 316 austenitic stainless steel has the highest value for iodide and the lowest for chloride. Bromide also stands in the intermediate place. It was also found that the occurrence frequency of metastable pits decreases in the following order: Cl->Br->I-. The anionic radius found to be possibly related to the metastable nucleation. According to pitting mechanisms, anions with smaller radii can promote pitting nucleation, more than others which have larger ionic radii. Statistical investigations carried out for metastable pits also show that the most stability product value pertains to the Cl- bearing solution. Lowest stability product however, belongs to the NaI solution and NaBr solution has again the intermediate value.

Keywords

, Pitting corrosion, Stainless steel, Halides, Metastable pits, Stability
برای دانلود از شناسه و رمز عبور پرتال پویا استفاده کنید.

@inproceedings{paperid:1059718,
author = {Pahlavan, Sohrab and Moayed, Mohammad Hadi and Mirjalili, Mostafa},
title = {The Effect of Halide Anions on the Pitting Corrosion of 316 Austenitic Stainless Steel},
booktitle = {5th International Conference on Materials Engineering and Metallurgy},
year = {2016},
location = {شیراز, IRAN},
keywords = {Pitting corrosion; Stainless steel; Halides; Metastable pits; Stability product},
}

[Download]

%0 Conference Proceedings
%T The Effect of Halide Anions on the Pitting Corrosion of 316 Austenitic Stainless Steel
%A Pahlavan, Sohrab
%A Moayed, Mohammad Hadi
%A Mirjalili, Mostafa
%J 5th International Conference on Materials Engineering and Metallurgy
%D 2016

[Download]