CN-122013198-A - Aluminum cleaning agent and preparation method thereof

Abstract

The invention relates to an aluminum cleaning agent and a preparation method thereof. The raw materials of the aluminum cleaning agent comprise a chelating agent, an alkali buffer, a degreasing agent, a surfactant, a corrosion inhibitor and a solvent, wherein the alkali buffer is selected from sodium silicate or sodium carbonate. The aluminum cleaning agent is additionally added with an alkali buffer, so that the aluminum cleaning agent has the core functions of alkali buffer, pH stability, auxiliary oil removal and slight rust prevention, and simultaneously meets the low corrosion requirement of aluminum cleaning.

Inventors

• ZHAO ZHIQIANG
• Liang Yinzan
• CHEN JIE
• YE ZHOU

Assignees

• 广东铂索新材料科技有限公司

Dates

Publication Date

20260512

Application Date

20260120

Claims (10)

1. 1. An aluminum cleaning agent is characterized by comprising a chelating agent, an alkali buffer, a degreasing agent, a surfactant, a corrosion inhibitor and a solvent, wherein the alkali buffer is selected from sodium silicate or sodium carbonate.
2. 2. The aluminum cleaning agent according to claim 1, wherein the sodium silicate is sodium metasilicate pentahydrate.
3. 3. The aluminum cleaning agent according to claim 1, wherein the chelating agent is EDTA salt, preferably EDTA-2Na.
4. 4. The aluminum cleaning agent according to claim 1, wherein the degreasing agent is a GX-12 alkali-resistant cationic surfactant.
5. 5. The aluminum cleaning agent according to claim 1, wherein the surfactant is DT-24 nonionic surfactant.
6. 6. The aluminum cleaning agent according to claim 1, wherein the corrosion inhibitor comprises a film forming agent and an electrochemical inhibitor.
7. 7. The aluminum cleaner according to claim 6, wherein the film forming agent is selected from the group consisting of silicone, gamma-aminopropyl triethoxysilane, methyltrimethoxysilane, vinyltriethoxysilane and monoalkyl phosphates.
8. 8. The aluminum cleaner according to claim 6, wherein the electrochemical inhibitor is selected from the group consisting of benzotriazole, tolyltriazole, mercaptobenzothiazole, benzimidazole, oleic acid imidazoline, hydroxyethyl imidazoline and sodium tungstate.
9. 9. The aluminum cleaning agent according to claim 1, wherein the aluminum cleaning agent is characterized by comprising, by mass, 66-75% of a solvent, 2-3% of a chelating agent, 5-8% of an alkali buffer, 4-6% of an oil removing agent, 8-12% of a surfactant and 3-5% of a corrosion inhibitor.
10. 10. The method for producing an aluminum material cleaning agent as recited in any one of claims 1 to 9, characterized by comprising the steps of: 1) Adding solvent into the container, adding chelating agent into the container according to the proportion, and stirring the mixture uniformly; 2) Adding an alkali buffer into the container, and uniformly stirring; 3) Adding an oil removing agent and uniformly stirring; 4) Adding a surfactant and uniformly stirring; 5) Adding corrosion inhibitor, and stirring.

Description

Aluminum cleaning agent and preparation method thereof Technical Field The invention relates to the technical field of detergent compositions, in particular to an aluminum cleaning agent and a preparation method thereof. Background In the fields of construction, automobiles, electronics, aerospace and the like, aluminum materials are widely applied due to the characteristics of light weight, high strength, excellent heat and electric conduction performance and the like. However, during the processing, storage and transportation of the aluminum product, pollutants such as rolling oil, cutting fluid, dust, fingerprints and the like are easy to adhere to the surface, and meanwhile, a layer of oxide skin or passivation film is naturally formed, and the substances can directly influence the quality of the subsequent coating, welding, bonding and other working procedures of the aluminum product, so that the surface of the aluminum product needs to be pretreated by an aluminum product cleaning agent. At present, the mainstream aluminum cleaning agent in the industry is mainly divided into three main categories, namely a solvent type cleaning agent which takes kerosene, gasoline, alcohols, dearomatics and the like as main components, has strong greasy dirt dissolving capability, but has the problems of strong volatility, inflammability and explosiveness, poor environmental protection and potential harm to the health of operators, a water-based cleaning agent which takes a surfactant as a core and is compounded with chelating agent, builder and other components, has the advantages of environmental protection, safety and low cost, and is a current mainstream development direction, and an acidic or alkaline special cleaning agent which is mainly used for removing oxide scales, and an alkaline cleaning agent (such as a sodium hydroxide and sodium carbonate containing system) which is mainly used for degreasing, but has obvious performance limitations. The existing aluminum cleaning agent generally lacks excellent acid and alkali resistance stability, and has the core problems that firstly, core components such as a surfactant and a chelating agent in the water-based cleaning agent are easy to generate hydrolysis or oxidation reaction in an acidic (pH < 4) or alkaline (pH > 10) environment to reduce activity and even lose effectiveness, and the cleaning effect cannot be continuously exerted, and secondly, a part of the cleaning agent is added with strong corrosive components to improve the cleaning efficiency, but the surface of the aluminum is easy to excessively corrode due to the lack of an acid/alkali resistance buffer system, so that defects such as pitting, light loss and the like appear on the surface in the cleaning process, and the processing performance of the aluminum is reduced. In addition, commercial aluminum cleaning agents generally achieve only short-term decontamination and cannot solve the long-term rust prevention problem. The reason for this is probably because most cleaning agents are not added with corrosion inhibitors or rust inhibitors, or added components (such as inorganic phosphate) are easy to run off along with the flushing liquid after cleaning, and a compact protective film cannot be formed on the surface of the aluminum material, so that the surface of the aluminum material is exposed to air, moisture or residual pollutants, and new oxidized rust can be formed in a short time (usually within 24-48 hours). Or after removing the oxide skin, the partial acidic cleaning agent can leave tiny corrosion pores on the surface of the aluminum material, the pores can become aggregation points of moisture and oxygen to accelerate the electrochemical corrosion process, and meanwhile, if residual impurities such as chloride ions, sulfate ions and the like exist after cleaning, the re-rust speed can be further increased, and the adhesive force of the subsequent coating or welding process is seriously affected. The above problems have become key points for restricting the improvement of the efficiency in the aluminum processing industry. Therefore, developing an aluminum cleaning agent which has excellent acid and alkali resistance stability and high cleaning efficiency and can effectively inhibit double rust is a technical requirement to be solved in industry. Disclosure of Invention The invention aims to disclose an aluminum cleaning agent and a preparation method thereof, which are used for solving one or more technical problems in the prior art and providing at least one beneficial selection or creation condition. In order to achieve the above purpose, the present invention is realized by the following technical scheme: The first aspect of the invention provides an aluminum cleaning agent. The raw materials comprise a chelating agent, an alkali buffer, an oil removing agent, a surfactant, a corrosion inhibitor and a solvent, wherein the alkali buffer is selected from sodium silicate or sodium carbon