Cathodic-polarization effects on the long/short corrosion-fatigue crack growth rate of an offshore steel

HU, H. and AKID, R. (2001). Cathodic-polarization effects on the long/short corrosion-fatigue crack growth rate of an offshore steel. Materials science, 37 (6), 902-909.

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Link to published version:: 10.1023/A:1015693124079

Abstract

We study the cyclic crack growth rate of an offshore steel. Compact specimens with long cracks and cylindrical specimens with short surface cracks were tested in air (at frequencies of 5-10 Hz) and in a 3.5% aqueous solution of NaCl (0.2 Hz). In the presence of cathodic polarization (-950mV/SCE), the growth rate of long cracks is higher than under the conditions of free corrosion. The plateau appearing in this case in the da/dN-DeltaK diagrams indicates the presence of hydrogen embrittlement. For DeltaK > 10 MPa, the growth rates of short and long cracks coincide.

Item Type: Article
Research Institute, Centre or Group: Materials and Engineering Research Institute > Structural Materials and Integrity Research Centre > Centre for Corrosion Technology
Identification Number: 10.1023/A:1015693124079
Depositing User: Ann Betterton
Date Deposited: 11 Feb 2010 12:19
Last Modified: 11 Feb 2010 12:19
URI: http://shura.shu.ac.uk/id/eprint/1071

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