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

H. Hu; R. Akid

doi:10.1023/A:1015693124079

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

H. Hu, R. Akid

School of Physics

Sheffield Hallam University

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

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 (-950 mV/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-ΔK diagrams indicates the presence of hydrogen embrittlement. For ΔK > 10 MPa, the growth rates of short and long cracks coincide.

Original language	English
Pages (from-to)	902-909
Number of pages	8
Journal	Materials Science
Volume	37
Issue number	6
DOIs	https://doi.org/10.1023/A:1015693124079
Publication status	Published - 2001

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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 (-950 mV/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-ΔK diagrams indicates the presence of hydrogen embrittlement. For ΔK > 10 MPa, the growth rates of short and long cracks coincide.",

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

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