The Influence of Dissolved Oxygen Concentration on the Corrosion Resistance of 316L Stainless Steel under Simulated BWR Primary Circuit Water Environment

DOI

10.2991/icmsa-15.2015.110How to use a DOI?

Keywords

BWR, Oxide Film, Potentiodynamic Polarization, Mott-Schottky Plot, Dissolved Oxygen.

Abstract

Austenitic stainless steels have been widely applied in the primary circuit of BWR. However, the corrosion caused serious damage to the equipment, affecting the service life of the plant, and lead to many security and economic danger. The oxide film generating on metal surface can slow down the corrosion rate in certain water chemical environment. Researches have shown that the concentration of dissolved oxygen is one of the important factors that affect corrosion resistance of the oxide film. This issue by simulating BWR primary circuit operating mode and controlling the concentration of dissolved oxygen in water solution, studied the corrosion of stainless steel in the autoclave to evaluate the effects of dissolved oxygen on corrosion. Experiments with 316L stainless steel as raw material, after forming an oxide film corrosion experiment, potentiodynamic scanning method and Mott-Schottky plot method were employed to discuss the performance of the stainless steel surface oxidation film. The potentiodynamic polarization curve results indicated that under the dissolved oxygen concentration of 0.28 mg/L and 8.20 mg/L, their current densities of oxidation film were close and significantly less than 0.50 mg/L. Mott-Schottky plot results indicated that under the dissolved oxygen of 8.20 mg/L the carrier concentration of oxide film was the lowest and the corrosion resistance remained its best performance.

Copyright

© 2015, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Wan-Wan Wang
AU  - Ke-Xin Liang
AU  - Xiang-Jian Li
AU  - Yu Tan
PY  - 2014/06
DA  - 2014/06
TI  - The Influence of Dissolved Oxygen Concentration on the Corrosion Resistance of 316L Stainless Steel under Simulated BWR Primary Circuit Water Environment
BT  - Proceedings of the 2015 International Conference on Material Science and Applications
PB  - Atlantis Press
SP  - 601
EP  - 606
SN  - 2352-541X
UR  - https://doi.org/10.2991/icmsa-15.2015.110
DO  - 10.2991/icmsa-15.2015.110
ID  - Wang2014/06
ER  -