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那么如何对铜雕停止维护颐养呢?

作者: 来源: 日期:2019-11-30 7:26:39 人气:0

①氧化银法。用氧化银与氧化亚铜接触,封锁氯化亚铜的暴出面,到达控制腐蚀铜雕的目的。先用机械办法,剔除粉状锈,显露灰白色蜡状物氯化亚铜。然后将氧化银与酒精调成糊剂,涂在氯化亚铜外表,并置于湿润环境中,使其充沛作用,构成氧化亚铜和氯化铜,掩盖氯化亚铜外表。两者皆为稳定性盐,如此屡次操作,直至将器物置于高湿环境中仍不呈现粉状锈的腐蚀点为止。此法适于斑点状部分腐蚀的器物及有金属镶嵌物的器物。(铜雕

① silver oxide method. Silver oxide is used to contact cuprous oxide to block the exposed surface of cuprous chloride, so as to control the corrosion of copper carving. First, remove the powdery rust by mechanical method, and expose the gray and white wax like cuprous chloride. Then silver oxide and alcohol are mixed into a paste, which is coated on the surface of cuprous chloride, and placed in a humid environment to make it fully functional, forming cuprous oxide and cuprous chloride to cover the surface of cuprous chloride. Both of them are stable salts, so they are operated repeatedly until the ware is placed in a high humidity environment and still does not show the corrosion point of powdery rust. This method is suitable for the articles with mottled partial corrosion and the articles with metal inlay.

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②苯骈三氮唑法。苯骈三氮唑是杂环化合物,与铜及其盐类能构成稳定络合物,在铜合金外表生成不溶性且相当结实的透明维护膜,使铜雕病被抑止并稳定下来,避免水蒸气和空气污染物的腐蚀。用蒸馏水和甲苯、丙酮等有机溶剂,肃清铜雕外表泥土油污,然后浸入苯骈三氮唑酒精溶剂中停止浸透,即可构成络合物维护膜。但苯骈三氮唑易受热升华,失去维护作用,置换出来转入浸液中。浸液需定时改换,直至浸液中无氯离子呈现为止。随后将器物用蒸馏水重复清洗,除去碱液,枯燥后封护。碱溶液仅把氯化物提取出来,保存着颜色斑斓的孔雀石等腐蚀层,不损伤铜雕的原貌。此法缺陷是置换反响时间长;另外氯化物不只附在锈层外表,而且已渗入器物腐蚀结壳的深部,难以置换彻底。

② benzotriazole method. Benzotriazole is a heterocyclic compound. It can form a stable complex with copper and its salts. It can form an insoluble and quite solid transparent maintenance film on the surface of copper alloy, which can prevent and stabilize the copper carving disease and avoid the corrosion of water vapor and air pollutants. Using distilled water, toluene, acetone and other organic solvents to eliminate the dirt on the surface of the copper carving, and then immerse in benzotriazole alcohol to stop the immersion, the complex maintenance film can be formed. However, benzotriazole is easy to sublimate and lose its maintenance function, so it can be replaced and transferred into the leaching solution. The immersion solution shall be changed regularly until no chloride ion is present in the immersion solution. Then, the utensil is repeatedly cleaned with distilled water to remove the alkali solution and sealed after being dry. The alkali solution only extracts the chloride, and preserves the colorful malachite and other corrosive layers, without damaging the original appearance of the copper carving. The defect of this method is that the reaction time of replacement is long; in addition, the chloride is not only attached to the surface of the rust layer, but also penetrated into the deep part of the ware corrosion crust, so it is difficult to replace completely.

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