What is pickling phosphating？
Pickling phosphating is a chemical and electrochemical reaction to form a phosphate chemical conversion film process, the phosphate conversion film formed is called phosphating film. Phosphating is a common pre-treatment technology, in principle should belong to the chemical conversion film treatment, mainly used in the surface of steel phosphating, non-ferrous metals (such as aluminum, zinc) can also be applied to phosphating.
For the process of metal surface treatment, pickling is to clean the metal with a concentration of acid to remove surface rust. Phosphating is to soak the acid-washed metal with phosphating solution to form an oxide film on the surface, which can prevent rust and improve the adhesion of the paint to prepare for the next step.
What is the difference between phosphating and pickling?
Acidification mechanism is different: pickling refers to the use of pickling solution such as hydrochloric acid, sulfuric acid and other substances on the workpiece to wash off the oxide layer and dust. The role of cleaning the surface; Phosphating is a treatment method, phosphating liquid, zinc phosphating liquid, manganese phosphating liquid, etc., there are many kinds of phosphating, the role is different, such as the phosphating of steel wire is to make the steel wire thin.
What is the effect of pickling and phosphating on metal？
1, the metal pickling is to remove rust and remove the oxide, for the next step that phosphating, electroplating, passivation and other treatments to prepare.
2, the phosphating of metal is to improve the corrosion resistance of metal and improve the adhesion of paint film.
3, simply put, pickling is in the metal surface rust and other things after the removal of these rust or.
