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Protection mechanism and process of Bronze


Electron spectroscopy tests on the iron substrate,[link widoczny dla zalogowanych], a thin layer of copper plating, the use of passivation passivation of the specimen, then the longitudinal depth of argon ion sputtering etching, are the main component elements of the film content and etching time curve, the results shown in Figure 2. Surface passivation film roughly divided into three parts: the surface layer, the inner layer and interference. Etching time from 0s ~ 500s, the etching of the surface layer, the surface layer and the air spaces in the formation of solid phase interface, with the increase of etching time, 0, N element content was gradually reduced. Cu,[link widoczny dla zalogowanych], Fe and C elements increased gradually. Etching time from when the 500s ~ 1500s. Etching the inner layer, in this region,[link widoczny dla zalogowanych], the content of each element is basically not much change, indicating that the chemical composition of passive film more stable inner layer, the surface hinders the migration of ions to the substrate, thereby increasing the specimen corrosion resistance, etching time from the 1500s ~ 2500s, the etching is the interference layer. The rough surface layer of the substrate is not flat,[link widoczny dla zalogowanych], a part of the base metal to be etched. C elements decreased gradually. We protect the instance of 3 Bronze Zhengzhou Museum of the Warring States and Han Dynasty when the bronze cauldron when the two pieces of bronze jewelry artifacts were soaked with the passivation Passivation 3h, slight color artifacts treated better, keeping the heritage of the Green original rust, stored in the warehouse for one year. There was no significant change in appearance and color. The passivation benzene Benzotriazole-based passivation agent, ethanol as solvent and add multi-component organic composition of promoter-specific protective agent bronze. Can significantly increase the inhibition effect and does not rust body and cause harm bronze matrix can be repeated dipping. Rust dip or not to rust direct dipping, can better maintain the original bronze. 4 Conclusions 1. Electroplated Cu-Sn-Pb Alloy by imitation bronze porous specimens. This method is simple, and can simulate the specimen hole bronze corrosion. Electrochemical workstation test tafel curves corrosion resistance can be compared quantitatively. 2. Specimen after the corrosion by passivation passive resistance ratio was increased by two orders of magnitude; with passivation treatment has corrosion specimen, rust had no effect on the corrosion resistance. And the original does not change basically. 3. Passivation treatment using 2 pieces of ancient bronze artifacts, one year of observation showed that the protective effect is satisfactory. References: [1] AlexanderKossolapov, JohnTcoilley. AdecoratedChinesedag. gerevidenceforancientamalgamtinning [J]. StudiesinCon ~ r. ration, 1994,[link widoczny dla zalogowanych],39:257. [2] SharmaVC, UmaShankerLal, NariMV. Zincdusttreatment-Aneffectivemethodforthecontrolofbronzediseaseonexca-vatedobjects [J]. StudiesinConservation, 1995,40:110. [3] Fan Chongzheng. Chang-Sui, wTChase, and so on. Bronze powder rust formation mechanism [J]. Science in China (B series). 1991,3:239. [4] Wang Huizhen, Weiguo Feng, Zhu Hong, et al. Bronze Corrosion and Protection of Ge [J]. Archaeology and Heritage, 2001,3:93. [5] Zhu Hongfan. Zhou Hao, Cai Lankun. Bronze corrosion characteristics of the occlusion cavity [J]. Conservation and Archaeology, 2002,14 (supplement): 29. [6] FaltermeierRobertB. Acorrosioninhibitortestforcopper-basedartihcm [J]. StudiesinConservation, 1999,44 (3): 121. [7] XU Qun-Jie, Zhou Guo-Ding, Lu Zhu, et al. Benzo-triazole and its derivatives in sulfuric acid corrosion inhibition of copper [J]. Corrosion, 2001,21 (3): 172. [8] YAN Chuanwei, Li-Ping Guo. 2 A Mercaptobenzoxazole (M80) Inhibition of Electrochemical study of copper [J]. Corrosion, 1999,19 (6): 363. [9] Liao original. Corrosion mechanism of bronze artifacts and harmful rust conversion agent of [J]. Conservation and Archaeology, 2003. 15 (2): 20. ∞ ∞ ∞ ∞ ∞ ∞ increases ∞ O Canada baskets c91co = vlu. Ⅲ 9l

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