Steel chemical polishing solution and application

Abstract

The invention provides a steel chemical polishing solution. The polishing solution is characterized in that the polishing solution mainly composed of a hydrogen peroxide solution, ammonium bifluorideand oxalic acid, wherein the oxalic acid has triple effects in the combination of the oxalic acid and the ammonium bifluoride, the oxalic acid becomes a good corrosion inhibitor, and is also a carrierof iron ions, hydrogen fluoride generated by the reaction of the oxalic acid and the ammonium bifluoride greatly enhances the effect of chemical polishing, the ammonium bifluoride component has the masking effect on the iron ions, and the service life is greatly prolonged. The chemical polishing solution has no contain high-pollution components such as nitric acid and phosphoric acid, no smoke isgenerated, and various types of steel and steel pieces can be polished; and a steel chemical polishing method has the advantages of being simple, high in polishing efficiency, and long in the service life of the polishing solution.

Description

technical field [0001] The invention belongs to the field of electroplating metal surface treatment, and in particular relates to a steel chemical polishing liquid and an application thereof. Background technique [0002] Chemical polishing is a metal surface treatment technology with simple equipment, low cost and high efficiency. As a surface treatment method, it can make the coating obtain good adhesion, brightness, flatness and corrosion resistance. It has been widely used in industrial production. The existing process formula consists of three elements: oxidizing agent, corrosion inhibitor and iron ion carrier. First, the oxidizing agent forms an iron oxide film on the steel surface, and secondly dissolves the iron oxide film to generate iron ions and load the iron ions into the solution. We It is called iron ionophore, and finally, the composition that produces characteristic adsorption to prevent over-corrosion during the dissolution process of iron oxide film by iro...

AI Technical Summary

Problems solved by technology

In the prior art, nitric acid and chromic acid are used as oxidants, and nitrogen oxides, chromium mist and other gases will be generated during use to pollute the environment, and nitrate and chromate residues remaining on the iron substrate will affect subsequent surface retreatment

Phosphoric acid, hydrofluoric acid, acetic acid, hydrochloric acid and sulfuric acid are used as iron ion carriers in the prior art, wherein phosphoric acid and hydrofluoric acid are highly polluting substances, which will increase the difficulty of water treatment, while acetic acid, hydrochloric acid and sulfuric acid can only be used as iron ion carriers Handle a single low carbon steel, and the effect is poor

In the prior art, oxalic acid or ammonium bifluoride is used alone as the iron ion carrier, and the effect of oxalic acid or ammonium bifluoride alone on chemical polishing is limited, and the types of chemically polished steel are also limited.