GALVANIC CORROSION OF COPPER COUPLED WITH STAINLESS STEEL IN SIMULATED UTERINE FLUID

J Chin Soc Corr Pro

1995, Vol. 15

Issue (4): 267-272 DOI:

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GALVANIC CORROSION OF COPPER COUPLED WITH STAINLESS STEEL IN SIMULATED UTERINE FLUID

Zhang Chengdian; Xu Naixin(Shanghai Institute of Metallurgy; Chinese Academy of Sciences)Yang Bingyan(The International Peace Maternity and Child Health Hospital of the China Welfare Institute)

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Abstract In VCu copper-bearing intrauterine contraceptive device, pure copper wire is coupled with OCr18Ni9 or 1Cr18Ni9Ti stainless steel wire. In order to understand its galvanic corrosion behavior, an investigation was carried out in the simulated uterine fluid. Under normal conditions, copper acted as anode, and the stainless steel, as cathode. The galvanic corrosion was controlled by cathodic process. Corrosion increment caused by the dissimilar metal contact increased with decreasing pH of the test medium. The increment value was 5% at pH 7.0, while 10% at PH 6.0. If a preactiwted stainless steel was connected with copper,reversed polarity was observed. The copper acting as cathode was proteged, while the corrosion of the stainless steel as anode was accelerated. When the stainless steel became passivated, the potential of the couple shifted towards positive and then resumed normal galvanic corrosion condition.

Key words: Galvanic corrosion Copper Stainless steel Intrauterine contraception device

Received: 25 August 1995

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Zhang Chengdian; Xu Naixin(Shanghai Institute of Metallurgy; Chinese Academy of Sciences)Yang Bingyan(The International Peace Maternity and Child Health Hospital of the China Welfare Institute). GALVANIC CORROSION OF COPPER COUPLED WITH STAINLESS STEEL IN SIMULATED UTERINE FLUID. J Chin Soc Corr Pro, 1995, 15(4): 267-272.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1995/V15/I4/267

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