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Citation: Niu Lin, Zhang Chang-Qiao, Lin Hai-Chao. Effect of Strain Rate and Potential on the Propagation of Stress Corrosion Crack[J]. Acta Physico-Chimica Sinica, ;2003, 19(07): 616-620. doi: 10.3866/PKU.WHXB20030710 shu

Effect of Strain Rate and Potential on the Propagation of Stress Corrosion Crack

1.
School of Chemistry and Chemical Engineering, Shandong University, Jinan　250100;　1State Key Laboratory for Corrosion and Protection of Metals, Institute of Metal Research, Chinese Academy of Sciences, Shenyang　110016

Received Date: 25 November 2002
Available Online: 15 July 2003

On the basis of the model of slip-bare metal dissolution-repassivation and crack-tip strain analysis, a theoretical equation of stress corrosion crack propagation rate as a function of crack-tip strain rate and potential for 304L stainless steel in acidic chloride solution was deduced. The theoretical prediction showed that there are two regions in the curve of crack propagation rate with the crack-tip strain rate. In region I, the crack growth rate increases with increasing crack-tip strain rate. In region II, the crack propagation rate is independence of the crack-tip strain rate. The crack propagation rate of 304L stainless steel in acidic chloride solution has been measured by slow strain rate testing (SSRT) technique. The crack propagation rate calculated theoretically was consistent with the experimental results in region II when potential was controlled in anodic region. Fig.8Ref.12
- Stress corrosion;Crack propagation;304L stainless steel;Strain rate;　Potential
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