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Grooving Corrosion Properties of Electric Resistance Welded Oil Well Casing of J55 Steel |
Rong Wang |
西安石油大学机械学院材料系 |
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Abstract An anodic dissolution at potential of -550mV(vs. SCE) is applied to investigate the grooving corrosion sensitivity of J55 steel oil well casing in electric resistance welding (ERW) zone. The grooving corrosion sensitivity coefficient α of three types of the ERW casings after polarized for 144h in 3.5% NaCl solution depends intensively on the carbon content of J55 steel. The grooving corrosion sensitivity rises as the carbon content of the steel increases. The simulated heat treatment after ERW welding can decrease the α value to some extent, and the annealing treatment with enough time below the phase transformation point reduces the α value of ERW casing considerably. The corrosive solution and test temperature have no apparent effects on the grooving corrosion sensitivity coefficient.
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Received: 20 June 2003
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Corresponding Authors:
Rong Wang
E-mail: rongwang@pub.xaonline.com
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