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CORROSION PRODUCTION ON ARCHAEOLOGICAL BRONZE SURFACE AND ITS DISTRIBUTION WITH DEPTH |
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北京化工大学 |
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Abstract The results of cycle voltammetry(CV) experimentation in simulated environment medium and XRD test are that main oxidation process is harmful patina CuCl formation and reduction process is CuCl reduced or deoxidised to pure Cu.The reaction current is so high that severely damages to bronze substrate.When bronze was corroded respectively at several potentials there exist elements Cu,Sn,Cl,O,C,S in corrosion production on bronze surface with SIMS observation.From high to low the relative content of anions is Cl,O,C,S.Cu/Sn value from outside and in corrosion production is always less than that in alloy.The relative content of Cu is basically stead,Sn fluctuates,Cl or O a little falls.
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Received: 24 December 2003
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