Let the Paint Find Its Own Way
We are Quzhou Chengji Coating from Zhejiang, China. This product is named after the science behind it. It is called electrodeposition. It means we let the paint "swim" to the part in an electric field. It then deposits itself. Have you had this problem? The part has deep holes, inner spaces, and tight corners. Your spray gun cannot reach them. Those spots always rust first. This product was made to solve that problem. It is perfect for complex parts like car frames, metal pipes, and electronic cases.
How the Science Works
We have spent 16 years mastering this science. The paint is a system with a positive charge. In a tank, a direct electric field is applied. The positively charged particles move like soldiers to the negatively charged part. They then deposit on the surface. The key is controlling the charge on the particles. You do not need to remember the term. Just know that we control the bath's pH and conductivity. This makes the particles move fast and deposit well. We follow the ISO 22553-2 standard. We control the particle size to 0.3-0.5 microns. This gives a smooth film with no small holes, even under high voltage.
Data Shows Its Covering Power
"Throwing power" is the key strength of this process. We test it with a standard box method. It is ISO 22553-5. We simulate a deep cavity and see how far the paint can go. Our product has a throwing power of over 80%. What does this mean? Think of a car body. The inside spaces and welded gaps are hard to reach. But our paint can "swim" in and deposit a film just as thick as on the outside. A car parts maker had trouble with rust inside their parts. They tried several suppliers. With our product, they cut the part open to check. The film was even. The salt spray test was passed easily. This solves rust in hard-to-reach spots.
|
Performance Parameter |
Test Standard |
Our Result |
| Throwing Power | ISO 22553-5 | >80% |
| Film Thickness Uniformity | - | ±2 microns |
| Particle Size | ISO 22553-2 | 0.3-0.5 microns |
Very Precise Thickness Control
With traditional spray, the thickness depends on the worker's hand. It can be uneven. But this process is controlled by electricity. As the film gets thicker, it acts as a resistor. The deposition slows down and then stops. We call this "self-limiting." For a common thickness range of 18-25 microns, we can keep the variation to ±2 microns. One client makes small electronic parts. The tolerance on their parts is very tight. With spray, their reject rate was high. With our electrodeposition, the film thickness is very stable. The parts fit perfectly. Their reject rate dropped to under 1%. This is a level of precision spray painting can never match.
Ready for an Automatic Factory
This process is perfect for automation. Our product works well with large, continuous, and smart production lines. All the bath values like temperature, pH, and solid content can be tracked by sensors. A system can add more paint automatically. One of our clients runs a fully automatic line. Only one person is needed to walk around and check. The rest is run by machines. This cuts down on labor costs. It also removes the quality problems that come from human error. This is how we help you move from old methods to smart manufacturing.
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