How to pick the right phosphate solution
Author: Robby
The following aspects need to be considered in selecting a suitable phosphating solution:
Composition and concentration: phosphating solution is mainly composed of phosphating agent, accelerator, neutralising agent, wetting agent and so on. Phosphating agent is the core component, which can react with the metal surface to generate a phosphating film; accelerator speeds up the phosphating reaction rate; neutraliser regulates the pH; wetting agent improves the uniformity and adhesion of the phosphating film.
Acidity and alkalinity: The acidity and alkalinity of the phosphating solution should be moderate to ensure its stability and effectiveness. Acidic or alkaline environment will affect the phosphating effect.
Ability to remove rust and grease: The phosphate solution should have the ability to remove rust and grease to improve the cleanliness of the metal surface and ensure the quality of the phosphate film.
The quality of the phosphating film: the ideal phosphating solution should be able to form a uniform, dense phosphating film to improve the corrosion resistance and adhesion of the metal surface. The hardness and abrasion resistance of the phosphating film are also important indicators.
Environmental performance: choose a low-pollution, non-toxic and harmless phosphate solution to ensure that the human body and the environment harmless.
Brand reputation and quality: choose a treatment solution with good brand reputation and reliable quality to ensure the stability and effect of long-term use.
Use scenarios: choose the appropriate phosphating solution according to the specific application scenarios. For example, low-temperature phosphating solution is suitable for the surface treatment of steel products, galvanised sheet phosphating solution is suitable for the treatment of galvanised sheet products, and medium-temperature zinc-calcium phosphating solution is suitable for the treatment of hot and cold rolled sheet products.