Reusable aluminum profile polishing solution and preparation method thereof

Abstract

The invention relates to a reusable aluminum profile polishing solution and a method for polishing an aluminum alloy workpiece by using the reusable aluminum profile polishing solution. The polishing solution consists of the following raw materials in percentage by mass: 30-45% of concentrated sulfuric acid, 35-45% of concentrated phosphoric acid, 0.5-1.5% of a corrosion inhibitor, 1-3% of tartaric acid and the balance of water. The corrosion inhibitor is composed of carboxymethyl cellulose and sulfosalicylic acid. The adopted polishing method comprises the steps that the aluminum alloy workpiece is subjected to oil removal, washed with water and then placed in the polishing solution to be polished, the aluminum alloy workpiece is washed with water, washed with absolute ethyl alcohol and then blow-dried, and the polished aluminum alloy workpiece is obtained. The polishing treatment temperature ranges from 70 DEG C to 85 DEG C, and the polishing time ranges from 120 s to 160 s. After the polishing solution is used for polishing the aluminum alloy workpiece, the surface roughness and glossiness of the aluminum alloy workpiece are good. The weight loss rate of the aluminum alloy workpiece is low, and the size of the aluminum alloy workpiece is hardly affected. The used polishing solution is subjected to chemical precipitation to remove aluminum ions, and the polishing solution without aluminum ions can be reused.

Description

technical field [0001] The invention relates to an aluminum profile polishing liquid and a preparation method thereof, in particular to a reusable aluminum profile polishing liquid and a preparation method thereof. Background technique [0002] Aluminum alloy has good corrosion resistance, formability, thermal conductivity, light weight and other characteristics. It has important applications in aerospace, machinery, electronic products and other fields. Aluminum alloy profiles are required to have good surface effects. Polishing is an important way to obtain excellent surface effects, eliminate surface defects, and improve service life. [0003] The polishing treatment of aluminum alloy includes mechanical polishing and chemical polishing. Among them, chemical polishing can polish aluminum alloy profiles of different shapes. The production method of chemical polishing is simple and the production cost is relatively low. It is a relatively common polishing method used in th...

AI Technical Summary

Problems solved by technology

However, there are still many problems in the acidic chemical polishing solution. For example, Patent Document 1 (CN106757039A) provides a nitric acid-free aluminum oxide polishing solution and its preparation method. At the same time, the added brightening agent, inhibitor and corrosion inhibitor can improve the Polishing effect, but on the whole, its roughness and gloss are not high, and it is difficult to meet higher requirements

In addition, there are many substances added, it is difficult to control the cost, and it is difficult to reuse

Patent Document 2 (CN106480458A) uses a nitric acid-free polishing solution. After the polishing solution is treated, the appearance of the junction and other parts is uniform, but the gloss is not high, and the weight loss rate of the aluminum alloy is high, which affects the final size of the aluminum alloy.