阅读说明：本技术 一种小型铝型材的表面处理工艺 (Surface treatment process of small aluminum profile ) 是由 魏道金 于 2019-10-22 设计创作，主要内容包括：本发明公开了一种小型铝型材的表面处理工艺,涉及铝制品表面处理领域。本发明仅需经过(1)脱脂、(2)抛丸、(3)酸洗、(4)钝化、(5)烘干即可完成小型铝型材的表面处理。本发明的一种小型铝型材的表面处理工艺,为社会提供了一套方便可靠的铝型材表面处理技术,使用该工艺处理的小型铝型材,其质地坚硬,耐磨性能和耐酸性能得到了加强,具有较好的实用性。(The invention discloses a surface treatment process of a small aluminum profile, and relates to the field of surface treatment of aluminum products. The surface treatment of the small aluminum profile can be completed only by (1) degreasing, (2) shot blasting, (3) acid washing, (4) passivation and (5) drying. The surface treatment process of the small aluminum profile provides a convenient and reliable aluminum profile surface treatment technology for the society, and the small aluminum profile treated by the process is hard in texture, enhanced in wear resistance and acid resistance and better in practicability.)

1. The surface treatment process of the small aluminum profile is characterized by comprising the following steps of:

(1) degreasing: placing the aluminum profile into a degreasing pool to be soaked for 3-5 minutes; the degreasing washing liquid in the degreasing pool is a sodium hydroxide solution with the concentration of 8-15 g/L;

(2) shot blasting: taking the aluminum profile out of the degreasing tank, washing the aluminum profile with water, and performing shot blasting treatment on the aluminum profile by using a shot blasting machine, wherein the consumed material is quartz sand with the particle size of 0.1-0.2 mm;

(3) acid washing: placing the shot-blasted aluminum profile into a pickling tank for chemical polishing, wherein the pickling solution contains 3-5% of sulfuric acid, 5-10% of hydrochloric acid and 6-12% of nitric acid, and the solvent is deionized water; after acid washing, taking out the aluminum profile and washing again;

(4) passivation: passivating the aluminum profile after washing, and washing the aluminum profile after passivation;

(5) drying: and (3) drying the aluminum profile after being washed in a dryer at the drying temperature of 105-120 ℃, and finishing the surface treatment of the small aluminum profile after the drying is finished.

2. The surface treatment process of the small aluminum profile according to claim 1, wherein the passivating agent used in the passivation in step (4) is a mixed solution prepared by fully dissolving 8-12 parts by mass of magnesium fluoride, 2-3 parts by mass of sodium tripolyphosphate, 2-4 parts by mass of fluorozirconic acid, 1-3 parts by mass of sodium fluorosilicate, 5-6 parts by mass of hydrochloric acid, 1-2 parts by mass of nitric acid, 12-15 parts by mass of phosphoric acid, 1-3 parts by mass of vinyltriacetoxysilane, 3-5 parts by mass of sulfuric acid, and 3-5 parts by mass of calcium nitrate in 1000 parts by mass of deionized water.

Technical Field

The invention relates to the field of surface treatment of aluminum products, in particular to a surface treatment process of a small aluminum profile.

Background

With the rapid development of national economy and high and new technology, the aluminum smelting and aluminum profile processing industry in China develops rapidly, which reaches 879.3 ten thousand tons in 2006 and becomes the first place in the world beyond the United states. While the total amount is high, China also faces huge waste in the aluminum product industry, and some old aluminum products are usually directly discarded, which causes certain damage to the environment.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a surface treatment process for a small aluminum profile, and the surface treatment process can be used for renovating a worn aluminum profile and changing waste into valuable.

In order to achieve the purpose, the invention adopts the technical scheme that: a surface treatment process of a small aluminum profile comprises the following steps:

(1) degreasing: placing the aluminum profile into a degreasing pool to be soaked for 3-5 minutes; the degreasing washing liquid in the degreasing pool is a sodium hydroxide solution with the concentration of 8-15 g/L;

(2) shot blasting: taking the aluminum profile out of the degreasing tank, washing the aluminum profile with water, and performing shot blasting treatment on the aluminum profile by using a shot blasting machine, wherein the consumed material is quartz sand with the particle size of 0.1-0.2 mm;

(3) acid washing: placing the shot-blasted aluminum profile into a pickling tank for chemical polishing, wherein the pickling solution contains 3-5% of sulfuric acid, 5-10% of hydrochloric acid and 6-12% of nitric acid, and the solvent is deionized water; after acid washing, taking out the aluminum profile and washing again;

(4) passivation: passivating the aluminum profile after washing, and washing the aluminum profile after passivation;

(5) drying: and (3) drying the aluminum profile after being washed in a dryer at the drying temperature of 105-120 ℃, and finishing the surface treatment of the small aluminum profile after the drying is finished.

Preferably, the passivating agent used in the passivation (4) is a mixed solution formed by fully dissolving 8-12 parts of magnesium fluoride, 2-3 parts of sodium tripolyphosphate, 2-4 parts of fluorozirconic acid, 1-3 parts of sodium fluosilicate, 5-6 parts of hydrochloric acid, 1-2 parts of nitric acid, 12-15 parts of phosphoric acid, 1-3 parts of vinyltriacetoxysilane, 3-5 parts of sulfuric acid and 3-5 parts of calcium nitrate in 1000 parts of deionized water according to the mass part ratio.

The surface treatment process of the small aluminum profile provides a convenient and reliable aluminum profile surface treatment technology for the society, and the small aluminum profile treated by the process is hard in texture, enhanced in wear resistance and acid resistance and better in practicability.

Detailed Description

The present invention will be described in further detail with reference to examples.