The requirements and standards of compressed air for electroplating mainly focus on the three aspects of dust particles, oil content and water content to ensure the stability of the electroplating process and the quality of the electroplating layer. The following is a detailed explanation of these requirements and standards:
1. dust particles
- requirements: The electroplating workshop requires the dust particle content in the compressed air to be as low as possible, and the particle content level is usually required to reach level 3, mainly to eliminate large particles of dust.
- Impact: Large particles of dust will cause bumps on the plating surface, which will affect the flatness and appearance of the plating.
2. oil content
- requirements: Electroplating workshops usually require that the oil content in the compressed air is very low, and it is generally required to reach the level 1 standard, that is, the oil content is <0.1 mg/m & sup3;.
- Impact: Excessive oil content will cause the small area of the plating layer to fall off, seriously affecting the plating quality.
3. water content
- requirements: The electroplating workshop requires the water content of compressed air to be controlled at a low level, usually requiring the water content level to reach level 2, and the pressure dew point is -20 ℃.
- Impact: Excessive moisture will cause uneven plating, which will affect the plating effect and product quality.
4. other requirements
- cleanliness the compressed air used in spraying must be clean and kept dry, and can not contain water, oil and other impurities, otherwise it will reduce the bonding strength.
- Pressure the pressure of compressed air also affects the plating effect. Generally speaking, the pressure of compressed air is 0.55~0.60 MPa. The pressure is too low, the atomized metal particles are large, the spray speed is low, and the bonding strength with the substrate is small; the pressure is too high, the sprayed metal particles are too fine, and the time to maintain the plastic state is too short, and it is quickly cooled and solidified during the spray process., It is not easy to deform after impact, and it will also reduce the bonding strength between the sprayed layer and the substrate.
5. processing equipment
in order to meet the above requirements and standards, electroplating workshops are usually equipped with corresponding compressed air handling equipment, such as filters, dryers, etc., to ensure that the compressed air provided to the electroplating process meets quality standards.
In summary, the requirements and standards of compressed air for electroplating are various, including dust particles, oil content, water content, cleanliness and pressure. These requirements and standards are formulated to ensure the stability of the electroplating process and the quality of the electroplated layer. In practical applications, electroplating workshops should select appropriate processing equipment and process parameters according to specific conditions to meet these requirements and standards.
