There are significant differences between phosphating and blackening treatments in a number of ways, mainly in terms of definition, process, corrosion resistance, color, application areas, and cost.
Author: Anna
There are significant differences between phosphating and blackening treatments in a number of ways, mainly in terms of definition, process, corrosion resistance, color, application areas, and cost.
Definition and process: Phosphate treatment is a surface treatment method to improve the corrosion and wear resistance of metal by forming a phosphate film on the metal surface, the process is more complex, including oil removal, pickling, phosphating, cleaning and other steps. The blackening treatment is a chemical reaction to generate an oxide film on the metal surface to achieve rust prevention and aesthetic effect of the surface treatment method, the process is relatively simple, including oil removal, oxidation, cleaning and other steps.
Corrosion resistance: phosphating treatment generated by the phosphide film has good corrosion resistance, can effectively prevent the atmosphere and corrosive media on the erosion of metal, thereby improving the service life of metal. In contrast, the oxide film generated by blackening is relatively thin, and the corrosion resistance is not as good as the phosphating film.
Color: phosphating treatment generated by the phosphate film color is generally gray or black, while the blackening of the oxide film generated by the color is relatively light, generally light blue or blue-black.
Application areas: phosphating treatment is mainly used in anti-corrosion and wear-resistant requirements of the field, such as automobiles, ships, aviation and so on. While the blackening treatment is mainly used in the field of aesthetic effect, such as tableware, handicrafts, daily necessities and so on.
Cost: Generally speaking, zinc phosphate treatment may be more complicated and expensive, as it requires more process steps and special chemicals to complete. In contrast, blackening treatment is less costly, with simple equipment and easy operation.
In summary, there are significant differences between phosphating and blackening treatments in terms of definition, process, corrosion resistance, color, application areas and cost. The choice of treatment depends on specific application requirements and cost considerations.