Aluminium alloy surface alkaline degreasing agent

Abstract

The invention discloses an aluminium alloy surface alkaline degreasing agent which is characterized by comprising the following components in parts by weight: 20 to 40 parts of mixed base, 1 to 5 parts of op-10 emulsifier and 1,000 parts of water, wherein the mixed base is a mixture of sodium carbonate, sodium hydroxide and trisodium phosphate and the weight ratio of the sodium carbonate to the sodium hydroxide to the trisodium phosphate is (3 to 4):(0.5 to 1.5):(3 to 4). The aluminium alloy surface alkaline degreasing agent has a strong effect of removing oil stain, has slight corrosion to an aluminium base and has good gloss. The aluminium alloy surface alkaline degreasing agent can be operated at normal temperature, energy is saved and the acid mist overflowing and the waste alkali discharge are reduced, so that the damage to human bodies and the pollution to the environment are reduced in the production link.

Description

technical field [0001] The invention relates to a degreasing agent, in particular to an alkaline degreasing agent on the surface of an aluminum alloy. Background technique [0002] In order to prevent the surface of aluminum alloy or aluminum steel from being oxidized by oxygen in the air, there will be a layer of grease on the surface of the substrate to protect it. The grease must be cleaned before electroplating, otherwise it will cause defects in the electroplating layer, such as pinholes and burrs etc. In severe cases, it will lead to electroplating failure and rework, causing the plating solution to lose balance and stability. Therefore, it is very important to choose a high-quality degreasing product during the electroplating process. [0003] Commonly used degreasing products include organic and inorganic products. Commonly used organic products include toluene, xylene, trichlorethylene, etc. Although they can directly dissolve oil, they usually have a pungent odor...

AI Technical Summary

Problems solved by technology

[0004] However, most of the common inorganic degreasers on the market contain oil and a large amount of strong alkaline substances such as sodium hydroxide, and some also have highly toxic sodium cyanide, which will corrode the active substrate. High temperature can play a role. At this time, the volatilized alkali mist will seriously damage human health and pollute the environment.

In addition, the surfactants in the additives are usually high-foaming surfactants, which will generate a lot of foam during use, and the wastewater is difficult to treat, so the application is greatly restricted, especially the restriction of environmental protection requirements