The electrostatic powder coating process typically involves several stages to ensure a successful and even application. Here are the common application stages of electrostatic powder coating:
The electrostatic powder coating process typically involves several stages to ensure a successful and even application. Here are the common application stages of electrostatic powder coating:
PREPARATION OF THE SUBSTRATE: Before applying powder coating, it is crucial to ensure that the surface is completely devoid of contaminants like oil, dirt, rust, and dust. Moreover, applying a chemical substance to the surface imparts specific properties. For instance, coating the material with a layer of phosphate or chromate after pre-cleaning enhances adhesion to the porous surface and provides protection against corrosion upon impact. Depending on the process requirements, intermediate steps such as rinsing and drying might also be included in the surface treatment procedures.
APPLICATION OF THE POWDER: The clean substrate is grounded, and the charged powder particles are sprayed onto its surface using a specialized spray gun. The gun imparts a positive charge to the powder particles, and due to the grounding effect, the object carries a negative charge. This electrostatic attraction ensures that the powder adheres uniformly to the surface
ELECTROSTATIC ATTRACTION: The positively charged powder particles are attracted to the grounded object, creating a thin and uniform layer of powder on the surface. The electrostatic charge holds the powder in place until it is cured.
CURING: After the powder is evenly applied, the object is moved to a curing oven. The heat in the oven causes the powder particles to melt and fuse together, forming a solid and smooth coating. The curing process also enhances the coating’s durability and adhesion to the substrate.
COOLING AND INSPECTION: Once the curing process is complete, the coated object is allowed to cool down. After cooling, the coating is inspected for uniformity, thickness, adhesion, and any defects. If necessary, additional coating can be applied to achieve the desired thickness.
QUALITY CONTROL: The final coated product undergoes quality control checks to ensure it meets the specified requirements and standards. This may include visual inspection, adhesion tests, and other quality assurance measures.
PACKAGING AND SHIPPING: After passing quality control checks, the coated objects are packaged and prepared for shipping to customers or for further assembly in manufacturing processes. It's important to note that variations in these stages can occur depending on the specific requirements of the coating job and the equipment being used. Different industries and applications may also have unique considerations in the powder coating process.
Check out our other products!
As a pioneer of the green economy in the electrostatic powder coating industry, our company is committed to providing high quality products with environmentally friendly production principles and to be prestigious and global with its solution-oriented approach. Our mission is to add value to our customers by combining the principles of innovation, quality and environmental responsibility.
