Phosphating solution suitable for phosphorization of low-alloy steel wires and preparation method thereof

Abstract

The invention discloses a phosphating solution suitable for phosphorization of low-alloy steel wires and a preparation method thereof and relates to the technical field of surface treatment of metal products. After zinc oxide and an aqueous solution are fully stirred and mixed into paste, phosphoric acid is slowly added, a reaction occurs, a zinc dihydrogen phosphate solution is generated, then amain oxidant, namely zinc nitrate, an accelerant, namely sodium metanitrobenzene sulfonate, a complexant, namely EDTA, stable system and buffer system composite additives A and scale for activation are added and stirred evenly, and the needed phosphating solution is obtained after dilution. Phosphorization treatment is conducted on the steel wires through the phosphating solution prepared with thepreparation method, uniform compact phosphating films with moderate thicknesses are formed on the surfaces of the steel wires, adhesive force of the phosphating films is enhanced greatly, the effectthat the steel wires have good lubrication performance during later drawing is ensured, scratching of the surfaces of the steel wires and a die is avoided, meanwhile, the good phosphating films also contribute to the improvement of oxidation resistance of the steel wires and the enhancement of corrosion resistance of the steel wires, and the phosphating solution is suitable for various common steel wires of different materials.

Description

technical field [0001] The invention relates to the technical field of surface treatment of metal products, and more specifically relates to a phosphating solution suitable for phosphating low-alloy steel wires and a preparation method thereof, and is also applicable to various common steel wires of different materials. Background technique [0002] In the metal products industry, common processes for steel wire production include oxide layer removal, coating treatment, drawing, heat treatment, etc. Among them, the surface of the steel wire must be treated before drawing—remove the iron scale on the surface of the wire rod or intermediate wire billet, and add an appropriate coating to prevent the iron oxide scale from damaging the surface of the mold and steel wire during drawing. Phosphating process is the most common surface treatment process. The purpose of phosphating treatment is to form a phosphating film on the surface of the steel wire, and the surface of the phospha...

AI Technical Summary

Problems solved by technology

However, the existing phosphating process is not yet mature. For example, the effect of phosphating low-alloy steel wire still has the following shortcomings: the quality of phosphating is unstable, the thickness of the phosphating film is too thin, and the adhesion of the phosphating film layer Poor, uneven phosphating, poor anti-rust effect after phosphating, prone to scratches during drawing, high mold consumption, etc.