The gold plating methods of gold-plated tungsten wire can vary according to specific application scenarios and needs. The following are some common gold plating methods:
Electroplating
Electroplating is a method of depositing gold on the surface of tungsten wire through the action of electric current. The method includes the following steps: using a tungsten wire as a cathode and putting it into an electrolyte solution containing gold; through the action of direct current, the gold ions are reduced to metallic gold and deposited on the surface of the tungsten wire. The electroplating method can obtain higher gold plating layer quality, but it requires the use of electrolytic equipment and current, and the cost is high.
Electroless plating
Electroless plating is a method of depositing gold on the surface of tungsten wire through a chemical reaction. The method includes the following steps: putting the tungsten wire into a chemical solution containing gold, and controlling parameters such as pH value and temperature of the solution to reduce gold ions to metallic gold on the surface of the tungsten wire and deposit it. The electroless plating method is simple to operate and low in cost, but it requires the use of chemicals and equipment, and it is difficult to control the thickness and quality of the coating.
Flame spraying
Flame spraying is a method that uses high-temperature flames to melt gold and spray it on the surface of tungsten wire. The method includes the following steps: placing the tungsten wire in the flame of the spray gun, placing the gold block on the other side of the spray gun, and spraying gold on the surface of the tungsten wire by controlling the flame and the molten state of the gold. The flame spraying method can achieve higher gold plating quality and adhesion, but it requires the use of a spray gun and fuel gas, and the operation is difficult.
Vacuum plating
Vacuum plating is a method in which gold is evaporated and deposited on the surface of tungsten wire under vacuum conditions. The method includes the following steps: placing a tungsten wire in a vacuum chamber, placing a gold block in a heating device, and controlling parameters such as heating temperature and vacuum degree to evaporate and deposit gold on the surface of the tungsten wire. Vacuum plating can obtain a high-quality gold plating layer, but it requires the use of vacuum equipment and evaporation sources, which is expensive.
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