Defects Caused By Wrong Use Of Mill Additives

A daily enamel product produced by an enamel factory always has defects of shrinkage and enamel shrinkage, that is, after the ground coat is fired, it will shrink and roll up from the edge of the decorative hole, thereby exposing the steel plate matrix. This defect is very serious and greatly It affected the quality of steel plate enamel products, but the analysis of the reasons was fruitless, so I contacted us and hoped to get a solution.


After understanding the customer's needs, the Hunan Noli technical team actively communicated with the customer and analyzed the defective samples. Finally, it was found that the customer mistakenly added sodium sulfite as sodium nitrite when using the mill admixture, although only The difference is one word, but the effect is vastly different. Sodium nitrite is one of the commonly used grinding additives. It belongs to the retention agent. In the ground coat, it can inhibit the rust of the product, resist "copper head", and most importantly, prevent cracking and cracking.

After finding out the reason, Shi Gong, a technician from Noli, re-proofed the metal blank (because only the ground coat was fired at the customer's request), which perfectly solved the problem of steel plate enamel defects, and the customer was very satisfied. The production of enamel products has two sources, enamel melting belonging to chemical industry and blank manufacturing belonging to metalworking, and finally to enamel coating belonging to thermal engineering. The process is complicated, and even a small mistake may cause enamel products. defect. Hunan Noli is proficient in diligence and provides one-stop service for customers. If you are also confused, please contact us!