If you want bronze sculptures to have collectible value, you must do a good job of protection and maintenance:
The unearthed bronze sculptures are often muddy and turbid, and the texture is unclear. The proper cleaning is carried out to let the soil fall off by itself, and then gently scrubbed with a small brush. When encountering soil rust that affects the decoration, it can be slowly removed with a small bamboo stick. Bronze brush or hard brush should be brushed hard, and it can't be cleaned with sharp tools, otherwise it will destroy the bronze sculpture and lose the collection value.
The method of protecting and protecting the bronze sculpture is as follows:
1 benzotriazole method. Benzotriazole is a heterocyclic compound that forms a stable complex with copper and its salts. It forms an insoluble and relatively strong transparent protective film on the surface of the copper alloy, which inhibits and stabilizes the copper engraving and prevents water vapor. And erosion of air pollutants. The complex oil protective film is formed by using distilled water and an organic solvent such as toluene or acetone to remove the dirt oil on the surface of the copper engraving, and then immersing it in a solvent of benzotriazole alcohol to permeate. However, benzotriazole is susceptible to heat sublimation and loses its protective effect. Therefore, a layer of polymer material should be applied to the surface of the copper sculpture to make a sealing film.
2 silver oxide method. Contacting the surface of the cuprous chloride with silver oxide in contact with cuprous oxide achieves the purpose of controlling the corrosion of the copper engraving. First, the powdery rust is removed by mechanical means to reveal a grayish white waxy cuprous chloride. Then, the silver oxide and the alcohol are adjusted into a paste, coated on the surface of cuprous chloride, and placed in a humid environment to fully act to form cuprous oxide and copper chloride, covering the surface of the cuprous chloride. Both are stable salts, so many operations, until the object is placed in a high humidity environment, there is no corrosion point of powdery rust. This method is suitable for objects with speckle-like local corrosion and articles with metal inlays.
3 lye soaking method. The corroded copper engraving is soaked in a sodium sesquicarbonate solution to gradually convert the copper chloride into a stable copper carbonate, and the copper ions of the copper engraving are replaced and transferred into the infusion. The immersion liquid should be replaced regularly until no chloride ions appear in the immersion liquid. The alkali solution only extracts the chloride and retains the corrosive layer such as the colorful malachite, without damaging the original appearance of the bronze sculpture. The disadvantage of this method is that the displacement reaction time is long; in addition, the chloride is not only attached to the surface of the rust layer, but also penetrates into the deep part of the crust, which is difficult to be completely replaced.
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How to do the protection and maintenance work of bronze sculpture? The above is the explanation given for this problem. I hope that it can help everyone. If you want the bronze sculpture to have collection value, you should do the protection and maintenance work in your normal life. . China Copper Sculpture Industry Network has the latest and most complete copper sculpture information. If you want to know the relevant information, you can visit the China Copper Sculpture Industry Network.
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