Phosphorus-free conversion (battery frame)

The phosphorus-free conversion used in battery frames is a new type of 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, process and application status:

principle

Phosphorus-free conversion treatment is based on the chemical reaction between the metal surface and a specific treatment liquid to form a uniform and dense conversion film on the metal surface. This conversion film is mainly composed of metal oxides, hydroxides or other compounds, which can improve the corrosion resistance, wear resistance and adhesion of the metal surface. Taking the common zirconium-based phosphorus-free conversion as an example, the zirconium ions in the treatment liquid will react with the atoms on the metal surface to form a conversion film containing zirconium compounds.

advantage

Environmental advantages: Traditional phosphorus-containing conversion treatment processes will produce phosphorus-containing wastewater. Phosphorus is one of the main pollutants that cause eutrophication of water bodies and causes serious harm to the environment. Phosphorus-free conversion technology avoids the use and discharge of phosphorus, meets environmental protection requirements, and helps reduce environmental pollution.

Good performance: Phosphorus-free conversion film has good corrosion resistance and water resistance, and can effectively protect the battery frame from erosion by the external environment. At the same time, the conversion film has a strong bonding force with organic coatings such as paint and coatings, which can improve the adhesion and durability of the coating, making the appearance of the battery frame more beautiful and the service life longer.

Cost reduction: The phosphorus-free conversion treatment process is relatively simple and does not require complex equipment and high reagent costs. Compared with some traditional surface treatment processes, phosphorus-free conversion can reduce processing steps and time, thereby reducing production energy consumption and costs.