【摘要】 从青铜器的小孔腐蚀机理出发,以电镀Cu-Sn-Pb合金多孔镀层作为模拟试片,采用电化学工作站定量测定腐蚀电阻的方法,研制出以苯骈三氮唑(BTA)为主钝化剂的乙醇型缓蚀保护剂,可将试片的腐蚀电阻提高2个数量级,达到107Ω.采用氩离子溅射纵向刻蚀和光电子能谱(XPS)相结合测试了缓蚀膜层成分的纵向分布,呈现较稳定的成分结构.应用保护剂成功地对郑州博物馆战国青铜釜和汉代青铜饰品2件文物进行了保护处理,处理后颜色微有加深,基本保持了文物的绿锈原貌.更多还原

【Abstract】 Based on the understanding of pitting corrosion process of bronze monuments,a porous Cu-Sn-Pb alloy plated Cu is postulated as sample to simulate the corrosion process of bronze and to evaluatethe relevant effectiveness of corrosion inhibitors.The corrosion resistance of the sample was measured quantitatively by an electrochemical workstation.A corrosion inhibitor is developed,with benzotriazole(BTA) as the main passivation agent and alcohol as solvent.The corrosion resistance of the sample is upgraded for above two order of magnitude and reaches 10~7 Ω by adding corrosion inhibitor.XPS was adopted to reveal the depth profile of elements of the film formed on the sample surface due to the inhibition effect of the inhibitor.The corrosion inhibitor was then used to treat a historical bronze kettle made in Zhan-Guo period and a historical ornament bronze made in Han dynasty successfully.The results showed that the color of bronze surface turned slightly dark and the original patina appearance of historical monuments have been preserved after the treatment.更多还原