CN-122013197-A - Aluminum alloy surface cleaning liquid, preparation method thereof and cleaning method

CN122013197ACN 122013197 ACN122013197 ACN 122013197ACN-122013197-A

Abstract

The invention provides an aluminum alloy surface cleaning solution, a preparation method thereof and a cleaning method. The aluminum alloy surface cleaning liquid comprises, by weight, 10-40 parts of an etchant, 0.02-0.2 part of a corrosion inhibitor, 0.2-1.2 parts of a surfactant and 0.5-10 parts of an auxiliary agent, wherein the mass ratio of the etchant to the surfactant is 100:1-10, and the mass ratio of the etchant to the corrosion inhibitor is 100:0.1-0.5. The aluminum alloy surface cleaning liquid has good stability, and by compounding the key components such as the etchant, the corrosion inhibitor, the surfactant, the auxiliary agent and the like, not only can the impurities, the aluminum scraps and the like attached to the surface of the aluminum alloy be effectively removed, but also the structural defects of the surface of the aluminum alloy can be flattened, so that the high-quality aluminum alloy surface is obtained, and the aluminum alloy surface cleaning liquid is better suitable for cleaning the surface of an aluminum alloy strip for a CTP plate.

Inventors

CHEN ZHENNING
HU GUOQIANG
YANG SHANGLIN
LI YINGDONG
YANG YANG
WANG GUOJUN
LIU YUNGANG

Assignees

中铝材料应用研究院有限公司

Dates

Publication Date: 20260512
Application Date: 20260206

Claims (10)

1. The aluminum alloy surface cleaning liquid is characterized by comprising the following components in parts by weight: 10-40 parts of an etchant; 0.02-0.2 parts of corrosion inhibitor; 0.2-1.2 parts of surfactant, and 0.5-10 Parts of an auxiliary agent; the mass ratio of the etchant to the surfactant is 100:1-10; The mass ratio of the etching agent to the corrosion inhibitor is 100:0.1-0.5.
2. The aluminum alloy surface cleaning solution as recited in claim 1, wherein the aluminum alloy surface cleaning solution comprises, in parts by weight: 12-30 parts of the etchant; 0.1-0.18 part of corrosion inhibitor; 0.2-1.2 parts of the surfactant, and 1.2-8 Parts of the auxiliary agent.
3. The aluminum alloy surface cleaning solution according to claim 1, wherein the etchant is selected from any one or more of ammonium bifluoride, citric acid, glycolic acid, acetic acid, tartaric acid, nitric acid, sulfuric acid and hydrofluoric acid, and when the etchant is a combination of tartaric acid and hydrofluoric acid, the mass ratio of the tartaric acid to the hydrofluoric acid is 0.1-0.6:1.
4. The aluminum alloy surface cleaning solution according to any one of claims 1 to 3, wherein the corrosion inhibitor is an organic corrosion inhibitor and/or an inorganic corrosion inhibitor, wherein the organic corrosion inhibitor is one or more selected from Lan826, sodium citrate, glycerin and imidazoline, the inorganic corrosion inhibitor is cerium nitrate, and when the corrosion inhibitor is a combination of sodium citrate and cerium nitrate, the mass ratio of the sodium citrate to the cerium nitrate is 6-9:1.
5. The aluminum alloy surface cleaning solution according to any one of claims 1 to 3, wherein the surfactant is a nonionic surfactant and/or an anionic surfactant, wherein the nonionic surfactant is selected from any one or more of isooctyl alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether and isomeric alcohol-based glucoside, the anionic surfactant is sodium dodecyl benzene sulfonate and/or sodium dodecyl sulfate, and when the surfactant is a combination of isomeric alcohol-based glucoside and sodium dodecyl benzene sulfonate, the mass ratio of the isomeric alcohol-based glucoside to the sodium dodecyl benzene sulfonate is 1.5-3.5:1.
6. An aluminum alloy surface cleaning liquid according to any one of claims 1 to 3, characterized in that the auxiliary agent is selected from any one or more of ethylene glycol, glycerol, polyethylene glycol, sodium sulfate and potassium sodium tartrate.
7. The aluminum alloy surface cleaning solution according to any one of claims 1 to 3, further comprising a solvent, wherein the solvent is water, and the solvent is 40 to 60 parts by weight.
8. A method for preparing the aluminum alloy surface cleaning liquid according to any one of claims 1 to 7, which comprises the step of mixing raw materials comprising an etchant, a corrosion inhibitor, a surfactant and an auxiliary agent to obtain the aluminum alloy surface cleaning liquid.
9. A cleaning method of an aluminum alloy surface cleaning liquid, which is characterized by comprising the following steps: immersing and washing the aluminum alloy in the aluminum alloy surface cleaning liquid to obtain the aluminum alloy with the surface cleaned; wherein the aluminum alloy surface cleaning solution is the aluminum alloy surface cleaning solution according to any one of claims 1 to 7 or is prepared by the preparation method according to claim 8.
10. The cleaning method according to claim 9, wherein the time of the impregnation is 20 to 100s, and the temperature of the impregnation is 20 to 60 ℃; and/or washing the surface of the impregnated aluminum alloy with water for 30-500 s.

Description

Aluminum alloy surface cleaning liquid, preparation method thereof and cleaning method Technical Field The invention relates to the technical field of aluminum alloy, in particular to an aluminum alloy surface cleaning liquid, a preparation method thereof and a cleaning method thereof. Background CTP plates (computer to plate) have high requirements on the surface quality of the aluminum substrates used, and generally, aluminum substrates should have good apparent quality, uniform quality, no stains, no irregularities, no scratches, no creases, no edge oxidation, no nonmetallic press-in, etc., and no defects of visible rolling lines, etc. that have an influence on printing. However, various defects such as pollutants, oxide films, scratches and the like are inevitably introduced into the surface of the aluminum alloy strip in the actual production process, and the production quality of the aluminum alloy strip is seriously reduced due to the defects, so that the quality of subsequent anodic oxidation and coating is greatly reduced, and the printing quality of a CTP plate is finally affected. In order to improve the surface quality of the aluminum alloy strip, various aluminum alloy material cleaning solutions and cleaning methods are developed successively, but most of the problems of complicated cleaning solution configuration and cleaning process, insufficient stability of the cleaning solution and the like exist, and the applicability to the dynamic and continuous aluminum alloy strip production process is extremely low. Therefore, development of an aluminum alloy strip cleaning solution suitable for CTP plates and a treatment method thereof are needed. Disclosure of Invention The invention mainly aims to provide an aluminum alloy surface cleaning solution, a preparation method thereof and a cleaning method thereof, so as to solve the problems of poor cleaning effect, complex cleaning method and poor applicability to a dynamic and continuous aluminum alloy strip production process caused by insufficient stability of the aluminum alloy cleaning solution in the prior art. In order to achieve the above purpose, according to one aspect of the invention, the aluminum alloy surface cleaning liquid comprises, by weight, 10-40 parts of an etchant, 0.02-0.2 part of a corrosion inhibitor, 0.2-1.2 parts of a surfactant and 0.5-10 parts of an auxiliary agent, wherein the mass ratio of the etchant to the surfactant is 100:1-10, and the mass ratio of the etchant to the corrosion inhibitor is 100:0.1-0.5. Further, the aluminum alloy surface cleaning liquid comprises, by weight, 12-30 parts of an etchant, 0.1-0.18 part of a corrosion inhibitor, 0.2-1.2 parts of a surfactant and 1.2-8 parts of an auxiliary agent. Further, the etchant is selected from any one or more of ammonium bifluoride, citric acid, glycolic acid, acetic acid, tartaric acid, nitric acid, sulfuric acid and hydrofluoric acid, and when the etchant is a combination of tartaric acid and hydrofluoric acid, the mass ratio of the tartaric acid to the hydrofluoric acid is 0.1-0.6:1. Further, the corrosion inhibitor is an organic corrosion inhibitor and/or an inorganic corrosion inhibitor, wherein the organic corrosion inhibitor is one or more selected from Lan826, sodium citrate, glycerin and imidazoline, the inorganic corrosion inhibitor is cerium nitrate, and when the corrosion inhibitor is a combination of sodium citrate and cerium nitrate, the mass ratio of the sodium citrate to the cerium nitrate is 6-9:1. Further, the surfactant is a nonionic surfactant and/or an anionic surfactant, wherein the nonionic surfactant is selected from any one or more of isooctyl alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether and isomerism alcohol group glucoside, the anionic surfactant is sodium dodecyl benzene sulfonate and/or sodium dodecyl sulfate, and when the surfactant is a combination of isomerism alcohol group glucoside and sodium dodecyl benzene sulfonate, the mass ratio of isomerism alcohol group glucoside to sodium dodecyl benzene sulfonate is 1.5-3.5:1. Further, the auxiliary agent is selected from any one or more of ethylene glycol, glycerol, polyethylene glycol, sodium sulfate and potassium sodium tartrate. Further, the aluminum alloy surface cleaning liquid further comprises a solvent, wherein the solvent is water, and the weight part of the solvent is 40-60 parts. According to another aspect of the invention, a preparation method of the aluminum alloy surface cleaning liquid is provided, and the preparation method comprises the steps of mixing raw materials comprising an etching agent, a corrosion inhibitor, a surfactant and an auxiliary agent to obtain the aluminum alloy surface cleaning liquid. According to another aspect of the invention, a cleaning method of an aluminum alloy surface cleaning solution is provided, and the cleaning method comprises the steps of immersing and washing an aluminum alloy in the aluminum alloy surface cleaning