黑漆古铜镜具有优异的耐腐蚀性能。采用溶胶凝胶法在青铜基体上模拟制备黑漆古铜镜表面的纳米SnO_2薄膜,并检测了该薄膜对于含Cl~-酸性溶液的耐腐蚀性,利用带EDAX的SEM进行了表面和截面的元素分析。结果表明薄膜的SnO_2物相能隔离本体与外界环境,具有一定的防护性能,而表面纳米SnO_2薄膜的致密度决定了防护效果。
The glassy black surface coating on many ancient chinese bronze mirrors was found to be mainly composed of nanometer-sized particles of SnO2. The nanometer SnO2 film was duplicated on bronze substrate by an improved sol-gel method. XRD showed that the duplicated film also mainly consisted of nanometer SnO2. The protective effect of the film so prepared and the coating of ancient black mirror was tested by acidic solution containing Cl-. SEM observation of central and edge regions on the prepared sample and the original glassy coating on ancient mirror indicated that the duplication treatment was successful and that the protective effect was dependent on the film density.
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