Phosphating solution is a mixed chemical reagent mainly composed of zinc nitrate, nitric acid, zinc oxide, and water. Mainly used for rust removal at room temperature.

The usage is to first calculate the required amount of each chemical according to the size of the phosphating tank, then add zinc oxide to the mixing tank, add water and stir to form a thick slurry, and slowly add phosphoric acid while stirring. After the solution releases heat, add it to the phosphating tank that has been added with water, and finally add zinc nitrate to the phosphating tank. Stir evenly before use. The phosphating time of this solution is 5-6 minutes.

Phosphating solution: Phosphating is a chemical reaction process in which metal reacts with phosphoric acid or acidic phosphate to form a phosphate protective film. The main components are phosphating slotting agent, supplement, adjuster, and accelerator.

It is generally composed of phosphating slotting agent (phosphating bath building agent), phosphating supplement, phosphating adjustment agent, and phosphating accelerator. Among them, slotting agent and supplement are the main components: slotting agent is used for the first time in tank building, and supplement is used for supplementation after tank building; Phosphating adjuster is used to adjust the total acid and free acid of the phosphating solution to achieve an appropriate acid ratio; Phosphating accelerator is an oxidant that mainly has depolarization effect and promotes the reaction rate of phosphating.