A chemical polishing solution for pure aluminum and aluminum alloy castings and its preparation method

Abstract

A disclosed chemical polishing solution for pure aluminium and aluminium alloy castings is characterized by being prepared from the following raw materials in parts by weight: 2-4 parts of potassium chloride, 3-4 parts of calcium carbonate, 3-5 parts of ethene diamine, 1-2 parts of urotropine, 5-6 parts of PPG-n castorate, 3.5-4.5 parts of lithium-based grease, 2-4 parts of citric acid, 3-5 parts of rosin amine, 1-2 parts of methylated methylol urea, 6-8 parts of phosphoric acid, 5-7 parts of an auxiliary agent, and 300 parts of deionized water. The chemical polishing solution is reasonable in formula, comprises phosphoric acid, citric acid and other conventional compositions, and also integrates calcium carbonate abrasive, lithium-based grease, PPG-n castorate and other surfactants and auxiliary agents and the like through a grinding technology, has good lubricity and uniformly-dispersed abrasive, and forms a protective membrane on a metal surface after being processed, and the membrane has the characteristics of being capable of preventing air corrosion and convenient to clean. The chemical polishing solution is stable and uniform in quality, good in polishing performance, stable in polishing speed and suitable for polishing of aluminium and aluminium alloy.

Description

technical field [0001] The invention relates to the technical field of surface treatment, in particular to a chemical polishing solution for pure aluminum and aluminum alloy castings and a preparation method thereof. Background technique [0002] The method of chemical polishing of aluminum and aluminum alloys is widely used, but the biggest disadvantage is that due to the high temperature of the polishing liquid and the fast reaction, it takes a long time for one station to go to the next during production on an automatic line, resulting in workpieces from After the chemical polishing tank comes out, it carries a large amount of residual chemical polishing liquid and stays in the air. During the process of the residual liquid flowing down and falling, at the same time, due to the existence of air, the surface will be corroded, oxidized to form different colors on the surface, and abrasives will damage the workpiece. Thus affecting the product quality. The present invention...

AI Technical Summary

Problems solved by technology

[0002] The method of chemical polishing of aluminum and aluminum alloys is widely used, but the biggest disadvantage is that due to the high temperature of the polishing liquid and the fast reaction, it takes a long time for one station to go to the next during production on an automatic line, resulting in workpieces from After the chemical polishing tank comes out, it carries a large amount of residual chemical polishing liquid and stays in the air. During the process of the residual liquid flowing down and falling, at the same time, due to the existence of air, the surface will be corroded, oxidized to form different colors on the surface, and abrasives will damage the workpiece. thereby affecting product quality