Chemical sanding agent for aluminum material and sanding process thereof

Abstract

The invention discloses a chemical sanding agent for an aluminum material. The chemical sanding agent is formed by mixing a solution C with a solution D, wherein the mixing ratio of the solution C to the solution D is 1:1 to 10:1. The solution C comprises the following components: 79.9-98.2 percent of inorganic acid, 0.1-10 percent of nickel sulfate, 0.1-10 percent of sodium molybdate and 0.1-10 percent of bismuth nitrate. The solution D comprises the following components: 90-99.9 percent of phosphoric acid and 0.1-10 percent of copper sulfate. The chemical sanding agent disclosed by the invention is free of fluorides and does not damage the aluminum material or a treatment tank during treatment; during treatment, the chemical sanding agent for an aluminum part can be exposed to air for a long time without being oxidized; therefore, the time for recycling a residual solution can be prolonged; the amount of taken-out chemical sanding agent for the aluminum material is extremely low; the chemical sanding agent can be used for a long time; meanwhile, the taken-out amount is reduced, so the service cycle of unit water amount can be effectively prolonged during water washing, and the amount of periodic water consumption is reduced.

Description

technical field [0001] The invention relates to metal surface treatment, in particular to an aluminum material chemical sanding agent and a sanding process for sanding the surface of aluminum materials. Background technique [0002] Due to the needs of design or use, many aluminum products need to be sanded on the surface to make the surface appear frosted. At present, the sanding treatment of aluminum materials is divided into physical sanding and chemical sanding, and the efficiency of physical sanding is low and the cost is high. Therefore, chemical sand blasting is widely used. The realization of chemical sand blasting and the quality of the sand blasting effect depend on the chemical sand blasting agent and sand blasting process. [0003] There are several deficiencies in the chemical sandblasting agents currently on the market. Specifically, the deficiencies are as follows: [0004] 1. The current chemical sandblasting agent contains fluoride in its components, whic...

AI Technical Summary

Problems solved by technology

[0004] 1. The current chemical sandblasting agent contains fluoride in its components, which is not environmentally friendly. At the same time, in the process of chemical sandblasting, fluoride will also damage the hanger with aluminum material and the container containing the sandblasting agent. Treatment tank

[0005] 2. The current chemical sanding agent can only process a sand surface with one kind of sand grain thickness. The effect of the sand surface is single, cannot be changed, and the flexibility is poor.

[0006] 3. Using the existing chemical sandblasting agent, in the actual sandblasting process, after the aluminum parts are taken out of the chemical sandblasting agent, they need to be washed in a clear water tank filled with water in a very short time. If the intermediate interval is too long, the chemical sandblasting agent remaining on the surface of the aluminum material will oxidize with the oxygen in the air, thereby causing damage to the outer surface of the aluminum material.

In order to prevent the oxidation reaction, the interval between taking out the aluminum parts and washing them in the water is extremely long. The aluminum parts often carry more sanding agent in the clean water, which not only accelerates the consumption of sanding agent, but also When the content exceeds the limit value, clean water needs to be replaced, and clean water is replaced more frequently, which causes a lot of waste of water resources

[0007] To sum up, the current chemical sanding agents cannot meet the needs of the industrial production of aluminum chemical sanding