Views: 0 Author: Site Editor Publish Time: 2021-09-23 Origin: Site
Zinc alloy and brass are generally used as alloys for making coins. Zinc alloy is an alloy composed of zinc and other elements. The alloying elements that are often added to make coins include aluminum, copper, magnesium, cadmium, lead, and titanium. The brass used to make coins is an alloy composed of copper and zinc. Brass composed of copper and zinc is called ordinary brass. If it is a variety of alloys composed of two or more elements, it is called special brass. In addition, the process of electroplating is also used in coin production.
Here is the content list:
l Tin alloy for making coins
l Coins made of brass
l Electroplating of coins
The zinc alloy used for making coins can be divided into cast zinc alloy and wrought zinc alloy according to the manufacturing process. Cast zinc alloy has good fluidity and corrosion resistance and is suitable for the production of metal coins.
Coins made of zinc alloy have the following characteristics:
1. The relative proportion of coin production is relatively large.
2. The performance of coin casting is good, and it can die-cast precision parts with complex shapes and thin walls, and the surface of the castings is smooth.
3. Surface treatment of coins: electroplating, spraying, painting, polishing, grinding, etc.
4. When coins are melted and die-cast, they do not absorb iron, do not corrode the pressure, and do not stick to the mold.
5. Coins have good mechanical properties and abrasion resistance at room temperature.
6. The coin has a low melting point, melts at 385°C, and is easy to die-cast.
Coins made of brass have strong wear resistance. Brass is often used to make coins, valves, water pipes, connecting pipes for internal and external air conditioners, and radiators. Brass composed of copper and zinc is called ordinary brass. Brass is an alloy composed of copper and zinc. They produced coins have high strength, high hardness, and strong chemical resistance
Electroplating is the process of plating a thin layer of other metals or alloys on the surface of a metal coin using the principle of electrolysis. It is a process of using electrolysis to attach a layer of the metal film to the surface of the metal coin to prevent the coin from oxidation (such as rust). , Improve wear resistance, electrical conductivity, receptivity, corrosion resistance, and enhance aesthetics. The outer layer of lots of coins is electroplated. Coin plating is divided into barrel plating, continuous plating, and brush plating, which are mainly related to the size and batch of the parts to be plated. Rack plating is suitable for products of general sizes, such as car bumpers, bicycle handlebars, etc. Barrel plating is suitable for coins. Brush plating is suitable for partial plating or repair of coins. Coin electroplating solutions include acidic, alkaline, and acidic and neutral solutions with chromium mixture. No matter what plating method is used, the plating tanks and hangers that are in contact with the coins to be plated and the plating solution should have a certain degree of versatility.
Pingyang Jiahong Crafts Factory has more than 20 years of experience in making coins. We produce coins using high-quality brass and zinc alloys. With a scientific production process and rigorous production attitude, our coins have won the trust of our customers with their excellent quality. Your satisfaction is our goal of pursuing excellence.