How To Do Steel Enamel Pre-treatment

In the enamel manufacturing industry, metal pretreatment is a crucial process, which directly affects the quality of the enamel finished product. Whether it is an enameled steel plate or a cast iron billet, pretreatment is required. It is worth mentioning that stainless steel enamel also requires stainless steel pretreatment. Stainless steel enamel needs to be sandblasted to roughen the surface of the body and improve the close adhesion between the enamel layer and the enamel layer.

A customer once tried to make stainless steel enamel by himself, but the adhesion of the finished product was not good. However, both the enamel manufacturing process and the quality of the enamel frit and stainless steel were confirmed to be correct. After in-depth investigation and testing by our technical staff, we found that the cause was the lack of metal pretreatment. After sandblasting pretreatment, the adhesion of the enamel finished stainless steel products is significantly improved, meeting the customer's expectations.

Taking steel plate enamel as an example, the metal pretreatment process is equally rigorous. First, the steel plate workpiece needs to be soaked in a degreasing liquid at 55 to 65 degrees Celsius for 15 to 30 minutes to completely remove oil stains on the surface. Next, the remaining liquid on the surface of the steel plate is thoroughly cleaned by water washing to ensure that no impurities remain.

Then comes the rust removal process, where the steel plate is soaked in a rust removal solution at 50~60°C for 10~15 minutes (the specific time depends on the rust on the surface of the steel plate). This step is to remove rust and oxides from the surface of the steel plate and ensure that the enamel layer can be evenly and firmly attached to the metal substrate. After rust removal, wash again to ensure the surface of the steel plate is clean.

Finally, the steel plate is neutralized to ensure that every part of the steel plate workpiece is immersed in the neutralizing solution to neutralize the remaining acid and alkali substances and prevent adverse effects on the subsequent enamel layer. After the neutralization is completed, the steel plate workpiece is naturally air-dried to prepare for the subsequent enameling process.

Although pre-treating enameled metal may seem simple, every step is crucial. It not only improves the quality of finished enamel products, but also extends the service life of the product. Therefore, as an enamel manufacturer, you should attach great importance to the metal pretreatment process and ensure that every step is operated in strict accordance with standards.

Nolifrit is a manufacturer of enamel frits and high-temperature resistant inorganic pigments. It provides customers with high-quality products and one-stop service. If you have relevant questions, please contact us!