Finite element calculation of crack propagation in type 304 stainless steel in diluted sulphuric acid solutions

被引：43

作者：

Gavrilov, S.

Vankeerberghen, M.

Nelissen, G.

Deconinck, J.

机构：

[1] CEN SCK, B-2400 Mol, Belgium

[2] Vrije Univ Brussels, B-1050 Brussels, Belgium

来源：

CORROSION SCIENCE | 2007年 / 49卷 / 03期

关键词：

stainless steel; electrochemical calculations; modelling studies; stress corrosion;

D O I：

10.1016/j.corsci.2006.06.025

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The crack propagation rate of Type 304 stainless steel in diluted sulphuric acid solutions was modelled based on finite element calculations of the chemical and electrochemical conditions within the crack and an analytical expression for the crack-tip strain rate. The slip/dissolution/repassivation mechanism was assumed. The influence of various variables - dissolved oxygen, sulphuric acid content, stress intensity, crack length, temperature, flow rate, sensitization and yield strength was studied and found to be in agreement with experimental observations. The model was calibrated against one data point. The effect of temperature on thermal conductivity, electrode reaction kinetics, equilibrium constants, yield strength and crack geometry was considered and the thermal activation energy for the crack propagation rate could almost fully be accounted for. (c) 2006 Published by Elsevier Ltd.

引用

页码：980 / 999

页数：20

共 19 条

[1] Toward the ultimate conservative scheme: Following the quest [J].