How to remove the patina on the bronze sculpture?

When the Bronze sculpture is placed for a long time, green "alkaline copper carbonate" will form on the surface. This product can prevent the copper material from rusting. It belongs to harmless rust and is not a big problem. Some bronze artists or collectors like it. The patina of bronze is deliberately preserved, but you can clean these rust stains if you mind that the patina growth is unsightly. After the successful production of bronze sculpture, anti-corrosion and anti-rust treatment is generally done on the surface. Afterward, the placement of the bronze sculpture should prevent places with high temperature and high humidity, and corrosive substances. These places will affect the color and luster of the bronze sculpture, etc., and also affect the beauty of the bronze sculpture. When a Bronze sculpture has a patina, the following methods can be used to eradicate the patina.

Here is the content list:

• Mechanical removal of patina

• Chemical removal of patina

Mechanical removal of patina

The patina on the bronze sculpture can be removed by using various things, such as stainless steel needles, hammer carving knives, chisels, chisels, stainless steel scalpels, multi-function engraving pens, dental scalers, etc., directly on the utensils. Because of the copper that occurs during the hydrolysis of cupric chloride, many gray-white cuprous chlorides are often covered under it. Therefore, after piercing the thin layer of copper with a steel needle, it is found that the chloride can be removed until the copper is seen. Stop immediately after the body. But don't use a wet rag to wipe or clean and maintain bronze sculpture works with water or oil. For surface dust, use a soft brush to remove it or a dry dusting cloth. In case of dirt that is difficult to remove, it is recommended to seek professional repair personnel.

Chemical removal of patina

Use chemical reagents to make rust removal solution to remove the patina on the surface of the bronze sculpture, with 5% to 10% citric acid, 5% to 10% ammonium hydroxide, and alkaline potassium sodium tartrate, the bronze can be directly soaked in the rust removal solution, you can also use absorbent cotton dipped in the rust remover, and then apply it to the rusted part of the Bronze sculpture. The silver oxide protection method is suitable for partially corroded utensils with mottled "powder rust". It is a method of forming a corner silver film under the effect of water vapor in the air after contacting silver oxide with cuprous chloride and closing the exposed surface of cuprous chloride to reduce the corrosion of bronze sculpture.

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