The content of sodium nitrate, sodium nitrite and sodium hydroxide in the solution is analyzed regularly every other week or so in order to timely supplement the relevant components. General use after half a year should replace all the solution. After "bluing" the metal, rinse it with hot soapy water for a few minutes before rinsing it with cold water. Then it is washed with hot water and blown on.

The protective film obtained by this method is black, and its main components are composed of calcium phosphate and iron oxides. The main components of black liquor are sodium hydroxide and sodium nitrite. Add the calculated amount of water to the pickling tank (no water should be added when the concentration of industrial hydrochloric acid is less than 25%), and then add the mist inhibitor according to the concentration of 2% hydrochloric acid weight, and stir thoroughly and evenly.

Dalian metal plastic spraying process does not produce toxic and harmful gas, and the effect of inhibiting hydrochloric acid fog is particularly good, improve the workshop working environment; This product reduces the surface tension of the pickling solution, so as to speed up the infiltration and permeability of the pickling solution on the steel surface, and speed up the stripping and dissolution of the rust layer. Generally, floating rust can be removed in about 5 minutes, and the derusting speed can be adjusted according to the needs of users.