Special plating aid for aluminum-containing zinc plating solution

Abstract

The invention relates to a special plating aid for aluminum-containing zinc plating solution, and belongs to the technical field of steel material surface plating technology. At first, hydrochloric acid is used to dissolve acid-soluble components in plant ash, rotary evaporation and concentration are carried out on filtrate after filtering, and dried filter residue is obtained after cooling and crystallizing; then, polyester staple fibers are soaked with sodium hydroxide solution, the polyester staple fibers are soaked with self-made liquid culture medium to modify the fibers; next, citric acid is consumed by using yeast aerobic respiration to release complexing cerium ions; in the meantime, carbon dioxide generated by the aerobic respiration is dissolved in water, the concentration of carbonate ions around the fibers is made to increase, and the carbonate ions are combined with the cerium ions to generate precipitates. The polyester fiber is removed and cerium carbonate is decomposed to obtain calcined material through calcination. Finally, the calcined material is mixed with the self-made drying filter residue and the like. According to the special plating aid, the excellent film-forming performance of dopamine is matched with the self-made calcined material to improve the current efficiency of the electroplating solution in the using process, the generation of aluminum chloride can be inhibited, and the problem that harmful smog is easily generated in the using process is avoided.

Description

technical field [0001] The invention relates to a special plating flux for an aluminum-containing galvanizing solution, which belongs to the technical field of surface coating technology of iron and steel materials. Background technique [0002] Flux plating is the process of immersing the pickled steel parts in a zinc ammonium chloride flux with a certain composition to form a thin layer of zinc ammonium chloride salt film on the surface of the parts. The fluxing process cleans the surface of steel parts, removes the iron salts or oxides left on the surface of the parts after pickling and cleaning, and makes the steel parts have greater surface activity when they enter the zinc bath. Depositing a layer of salt film on the surface of steel parts can prevent the steel parts from rusting in the air during the period from the fluxing pool to the zinc pot. When the iron and steel parts that have been treated by the plating treatment are immersed in the zinc solution, the ammoni...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: in the process of hot-dip plating, the traditional plating flux and the aluminum in the aluminum-containing galvanizing solution generate aluminum chloride which is easy to sublimate at a relatively low temperature, resulting in a large amount of harmful smog being produced on the production site. Problems that affect workers' operation and the surrounding environment provide a special flux for aluminum-containing galvanizing baths