The surface condition and processing requirements in the electroplating process, and the selection of appropriate steps to finish the surface of parts to make the surface of parts smooth and smooth is an important link to obtain high-quality coating. In the pretreatment process of electroplating, the main equipment includes grinding machine, polishing machine, brushing machine, sandblasting machine, rolling mill and various fixed grooves. Electroplating is the main process in the whole production process. According to the requirements of parts, select one or several single metal or alloy electroplating processes to conduct electroplating or immersion treatment on parts to achieve the purpose of corrosion prevention, wear resistance and beauty. The equipment used in the electroplating process mainly includes various fixed tanks, barrel plating tanks, hangers, baskets, etc. After electroplating, polishing, polishing, passivation, coloring, drying, sealing and dehydrogenation of parts. Select one or more processes as needed to meet quality requirements. The common equipment for electroplating post-treatment mainly includes grinding machine, polishing machine and various fixed grooves.

Electroplating, casting, forging and heat treatment have been the main directions of environmental pollution. Due to people's weak awareness of environmental protection and weak government supervision, environmental damage has become increasingly serious. As heat treatment workers, how should we face these problems and start from ourselves? This is worth pondering. The environmental pollution caused by heat treatment production is very serious, including waste gas, waste water, waste liquid, waste residue, dust, noise, electromagnetic radiation, etc. With the development of production, its harm is more and more serious.

1. Why are there pits in vacuum nickel plating?

Bubbles cannot be discharged because the pits are the result of organic pollution. Large pits usually indicate oil contamination. be down in spirits. This will create pits. Usually small pits are called pinholes. The solution is to use wetting agent to reduce its effect. Improper pretreatment, too little metal impurities, boric acid content, and too low bath temperature can all lead to pinholes. Therefore, bath maintenance and strict control process are the key.

2. Surface roughness (burr) after nickel plating

Oxygen hydrogen precipitation is formed due to high BPH in solution; C Cause of high current density: A; Can be corrected by adequate filtration; When the pH is too high, the precipitation of hydroxide should be controlled;   Electroplating equipment Impurities are brought into the solution through excessive current density, anode mud and adding water. The solution is dirty if it is rough. In severe cases, roughness may occur.

3. Low binding force

If the copper coating is not activated to remove the oxide layer, the adhesion between copper and nickel is poor. The coating will peel off. If the current is interrupted, the nickel layer may peel off; If the temperature is too low, it will also peel off.

Let's start with some subjective solutions.

1. Develop vacuum heat treatment, chemical heat treatment, thermo mechanical heat treatment, composite heat treatment and other multi parameter heat treatment and composite heat treatment processes, and promote their application.

2. New heat source and new heating method

3. New quenching medium and improved quenching method

4. Develop new heat treatment equipment

5. Strengthen the close combination and mutual promotion of new materials and heat treatment process

6. Pay attention to energy conservation and environmental protection of heat treatment