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Aluminum Surface Treatment Additives Adsorption Corrosion Inhibition

Oct 10, 2017

Aluminum Surface Treatment Additives Adsorption corrosion inhibition

Characteristics of Surface Treatment Additives for Aluminum Processing

Experiments show that the surface treatment of aluminum processing This additive has the following characteristics with adsorption corrosion inhibition, so that the surface of the profile to form a protective film to reduce corrosion of corrosive media on the profile. With the leveling effect, the concave part of the profile to fill, exposing the protruding part of the corrosive medium to react with the protruding part to achieve the role of leveling. With a certain viscosity, so that the rapid convergence of the bubble bubble to achieve defoaming effect. Thus achieving mass production. With emulsifying and dispersing the wetting and infiltration characteristics, to achieve uniform and uniform corrosion of the oil bath effect. Optimization of the chemical composition of the smoke-free chemical polishing baths In order to determine the proportion of the components of the smoke-free chemical polishing bath, the effective concentration of the phosphoric acid-sulfuric acid was tested.

According to the actual production situation, the bath temperature control is a relatively economical way to save energy, phosphoric acid consumption is the main part of the cost of chemical polishing, the choice of lower phosphoric acid concentration is an effective way to reduce the cost of polishing, for which we chose the following bath Ingredients as a control based on phosphoric acid to write, sulfuric acid sulfuric acid chemical polishing additives through the production in recent years, proved to be a successful control means.

Phosphoric acid and sulfuric acid ratio should cause enough attention, phosphoric acid is the main component of the polishing solution, corrosion of aluminum and aluminum phosphate in the surface of the adhesive film, from the polishing effect. Only phosphoric acid, the reaction is weak, the polishing effect is not good, adding sulfuric acid, improve the reaction rate, polishing effect is improved. Sulfuric acid is too easy to produce corrosion, it must control the acid concentration within the allowable range. The proportion of chemical polishing liquid due to continuous production of aluminum content should be greater proportion, the proportion is too large, the buoyancy is easy to float off the production, the tank absorbs moisture in the air, the concentration decreases, the proportion becomes smaller, the brightness decreases. Therefore, the proportion of the bath must be controlled.

The bath concentration is small, the bath should be heated to a few hours of insulation, evaporation of part of the water to increase the proportion, but also within the allowable range of sulfuric acid to increase the proportion of the proportion is too large, should add the recovery liquid or phosphate The The weight should be measured once a day. The main effect of the viscosity additive is to increase the brightness and prevent corrosion during transfer, which is achieved by increasing the viscosity of the bath.

No additives, although the specific gravity of the solution but the viscosity is small, can not produce conducive to polishing the adhesive film, so throwing, adding additives can significantly increase the viscosity of the solution, the polishing effect is significantly improved, when the additive concentration of 2g, the best polishing effect , Too much, too much viscosity, bring out the loss of large. Liquid level due to bring out and evaporation, the bath to reduce the liquid level down, so every day must adjust the level of the liquid level, with the addition of new acid to adjust to reduce the concentration of aluminum, stainless steel can replace stainless steel, and through the The existing process parameters and the adjustment of the bath components to achieve the anti-corrosion control of the tank material, as our research topic, for which we use orthogonal test design of the following test.