Phosphate-free conversion (shelf)

The phosphorus-free conversion used in the shelf is an environmentally friendly metal surface treatment technology, which is mainly used to replace the traditional phosphorus-containing conversion treatment process. The following is an introduction to its principles, advantages, applications, etc.:

principle

Phosphorus-free conversion is based on the chemical reaction between some non-phosphorus chemicals and the metal surface to form a conversion film with protective and decorative effects. For example, a conversion solution containing titanium salts, zirconium salts and other ingredients may be used. Under certain conditions, these metal ions will react with the atoms on the metal surface of the shelf to form a dense, well-adhesive oxide film or complex film. This film can improve the corrosion resistance, wear resistance and coating performance of the metal surface, and provide a good base for subsequent coatings.

advantage

Environmental advantages: Traditional phosphorus-containing conversion treatment processes will produce phosphorus-containing wastewater. Phosphorus is one of the main factors leading to eutrophication of water bodies, causing serious pollution to the environment. The phosphorus-free conversion process does not use phosphorus-containing compounds, which eliminates phosphorus emissions from the source, meets environmental protection requirements, and helps reduce damage to the ecological environment.

Good performance: Phosphorus-free conversion film has good corrosion resistance and water resistance, which can effectively protect the metal substrate of the shelf and extend the service life of the shelf. At the same time, the surface performance of the conversion film is excellent, and the adhesion to the coating is strong, which can improve the quality and stability of the coating and make the appearance of the shelf more beautiful and durable.

Easy to operate: The operation of the phosphorus-free conversion process is relatively simple, with a short process flow, and does not require complex equipment and strict control conditions. The conversion liquid has good stability and a long service life, which can reduce production and maintenance costs. In addition, the amount of water used for cleaning after phosphorus-free conversion treatment is small, which also helps save water resources.