Coating Process

The general principle behind the coating process is to paint a protective layer on the surface of the substrate especially metals to prevent them from reacting with the moisture in the air to form the iron oxide which is essentially rust that could jeopardize the quality of the substrate. Moreover, the water-proof properties of the coated materials can prevent acidic rain which is due to the reaction between rainwater and chlorine from corroding the substrate too. Coating process or industrial painting plays an important role in ensuring the surfaces of materials free from these harmful chemical reactions.

The advanced coating process can be broadly classified into vapor deposition, chemical, and electrochemical techniques, spraying and roll to roll coating but generally, paint coating or industrial painting starts with surface preparation. Before a surface can be applied with a layer of coating or paint, it has to be free of dust, loose particles, as well as the previous painting which requires a certain level of professional skills. There are two methods of preparation which are water jetting and abrasive preparation that could be applied. Water jetting is carried out by applying a blast of water jet on the surface of the material to be coated which can effectively clean off the dirt and grit trapped inside the surface. Meanwhile, the abrasive method uses dry, wet or a combination of dry and wet to remove the dirt and chemicals prior to preparing the materials for the coating process.

After the surface preparation process has been done, coating or paint can be applied by means of brush and roller or through spray painting and powder coating. This is especially prevalent in the field of industrial painting. Powder coating is carried out by applying the electrostatic charge on the particles of dry paint before being positioned on a grounded surface. The electrostatic force will bind the powder particles onto the surface being coated before applying heat to enable the powder coating to flow and be cured in place smoothly. Paint coating is also one of the effective options to be applied. Resins and sealants can be delivered effectively under pressure and electrostatic charge can be applied to the spray as well to ensure strong binding with the surface being coated. Right after the coating process, a finishing coat is then added to the outermost surface to give the surface its decorative purpose. Give us a call now to get to know more about our services!