The production of cast iron parts with a water-based coating is an important part in the manufacturing process. The components of the water-based coating have a great influence on the performance of the finished product. In order to choose the best combination of components for the water-based coating, it is necessary to understand the suitable weight ratio of each component and its performance characteristics.
It is generally recommended that the weight ratio of each component for the water-based coating for cast iron is as follows:
1. Binder: 5 to 25 percent. The binder is the key component of the coating, and its function is to give body and cohesion to the coating. It also plays an important role in its physical properties, such as hardness, adhesion, wear resistance and toughness. As a rule of thumb, higher binder content will result in better performance.
2. Pigment: 2 to 10 percent. The pigment is used to give the coating color and opacity. This can range from white to black and any other color. Different pigments also have different performances, so choosing the right one is very important.
3. Solvent: 25 to 55 percent. The solvent is used to disperse components and reduce the viscosity of the coating. Generally, water is the main solvent for water-based coatings, although other solvents like ethanol can also be used.
4. Abrasive: 5 to 25 percent. This is the component of the coating that increases its abrasion resistance. It can be any kind of abrasive material, such as silica, alumina, or synthetic diamonds. The type and amount of abrasive depend on the desired performance.
5. Leveling Agent: 0.5 to 1.5 percent. This component is used to reduce surface tension and to help the coating spread evenly over the surface. It helps to reduce the formation of bubbles and other imperfections in the coating.
6. Thickener: 1 to 10 percent. The thickener makes the coating solution thicker, which increases its viscosity. This helps the coating to stay on the surface and to form a solid coating.
7. Additives: Optional. This can include various additives, such as UV inhibitors, reducing agents, and antifungal agents, depending on the required performance.
Each of these components should be selected based on the desired performance of the coating and the production technique that will be used. A good quality, correctly composed water-based coating will improve the performance and extend the life of the cast iron part.
