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| THE INFLUENCE OF BRINE AND CATHODIC PROTECTION POTENTIAL ON THE LONG AND SHORT FATIGUE CRACK GROWTH BEHAVIOUR OF 12CrNi3MoV STEEL |
| Wang Haijiang and Yang Shiwei(Harbin Shipbuilding Engineering Institute) |
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Abstract The long and short fatigue crack growth(FCG) of 12CrNi3MoV steel was investigated under cathodic protection(CP) in 3.5％NaCl solution. The results indicated that the long FCG was different from the short one in brine and under cp. In salt water, the short FCG rate increased while the long FCG rate decreased. The short FCG was apparently hindered at appropriate CP potential (—900mV, SCE) and accelerated at over-protection potential (—1200mV, SCE). On the contrary, CP increased the long FCG rate and the more negative the CP potential, the greater was the long FCG rate. The short FCG rate was greater than the long one at the same ΔK and the difference increased in salt water, but decreased under CP. Finally the oxygen trans-portation, the wedging of corrosion products and the hydrogen embrittlement effect in both long and short crack tips were discussed.
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Received: 25 August 1992
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Cite this article:
Wang Haijiang and Yang Shiwei(Harbin Shipbuilding Engineering Institute). THE INFLUENCE OF BRINE AND CATHODIC PROTECTION POTENTIAL ON THE LONG AND SHORT FATIGUE CRACK GROWTH BEHAVIOUR OF 12CrNi3MoV STEEL. J Chin Soc Corr Pro, 1992, 12(4): 371-376.
URL:
https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1992/V12/I4/371
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