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Normal-temperature stable high-efficiency environment-friendly sealing agent for aluminum and aluminum alloy

A technology of sealant and aluminum alloy, which is applied in the direction of electrolytic coating, surface reaction electrolytic coating, coating, etc., can solve the problems of uneven surface of aluminum workpiece, high weight loss of detection sealing hole, loss of gloss of sealing film, etc., to achieve Long service life, low price, and dense sealing film

Active Publication Date: 2018-02-27
JIANGSU FEITUO INTERFACE ENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, according to the research in the industrial production process, the current nickel-free sealing technology in industrial production has the loss of gloss and poor gloss retention of the sealing film; the surface of the aluminum workpiece is uneven after sealing, and it is easy to turn white and powder; The sealing speed is slow, the detection of the sealing hole is high in weight loss, the energy saving effect is poor, and the life of the bath is short, etc.

Method used

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  • Normal-temperature stable high-efficiency environment-friendly sealing agent for aluminum and aluminum alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A stable and high-efficiency aluminum and aluminum alloy environmental protection sealing agent at room temperature, characterized in that: the environmental protection sealing agent is composed of 3% sodium acetate, 0.5% sodium benzoate, 0.5% urea, nonylphenol polyoxyethylene ether 10%, fatty alcohol polyoxyethylene ether 5%, sodium ethylenediaminetetramethylene phosphate 5%, sodium aminotriacetate 5%, disodium methylene bis-naphthalene sulfonate 2%, acetic acid 2%, tripolyphosphoric acid Sodium 2%, deionized water 65%.

[0017] Anodize the aluminum workpiece to prepare a 10-15 μm thick oxide film layer, then immerse the aluminum workpiece in the above-mentioned sealant at 30°C and adjust the pH value to 6 for 10 minutes, take out the aluminum workpiece, clean it, and air dry it.

[0018] After the hole is sealed, the surface of the aluminum product workpiece is bright and smooth, without water stains, yellow spots and powder frost.

[0019] By scanning electron micro...

Embodiment 2

[0022] A stable and high-efficiency aluminum and aluminum alloy environmental protection sealing agent at room temperature, characterized in that: the environmental protection sealing agent is composed of 6.5% sodium acetate, 0.5% lithium acetate, 2% sodium benzoate, cetyl sulfo Disodium phenoxybenzenesulfonate 15%, sodium ethylenediaminetetramethylene phosphate 10%, sodium diethylenetriaminepentamethylene phosphonate 5%, sodium potassium tartrate 5%, hydroxyalkylphenol polyoxyethylene ether 4 %, accelerator 2%, tartaric acid 5%, phosphoric acid 1%, sodium tripolyphosphate 2%, deionized water 42%.

[0023] Anodize the aluminum workpiece to prepare a 10-15 μm thick oxide film layer, then immerse the aluminum workpiece in the above-mentioned sealant at 30°C and adjust the pH value to 5.9 for 10 minutes, take out the aluminum workpiece, clean it, and air dry it.

[0024] After the hole is sealed, the surface of the aluminum product workpiece is bright and smooth, without water st...

Embodiment 3

[0028] A stable and high-efficiency aluminum and aluminum alloy environmental protection sealing agent at room temperature, characterized in that: the environmental protection sealing agent is composed of 10% sodium acetate, 1% lithium acetate, 2% sodium benzoate, 1% urea, polyethylene 12% pyrrolidone, 5% aminopropyltrimethoxysilane, 5% disodium methylene bis-naphthalene sulfonate, 3% sodium citrate, 3% hydroxyalkylphenol polyoxyethylene ether, 3% citric acid, Sodium dihydrogen phosphate 2%, sodium tripolyphosphate 2%, deionized water 51%.

[0029] Anodize the aluminum workpiece to prepare a 10-15 μm thick oxide film layer, then immerse the aluminum workpiece in the above-mentioned sealant at 28°C and adjust the pH value to 6.2 for 12 minutes, take out the aluminum workpiece, clean it, and air dry it.

[0030] After the hole is sealed, the surface of the aluminum product workpiece is bright and smooth, without water stains, yellow spots and powder frost.

[0031] By scanning ...

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Abstract

The invention discloses a normal-temperature stable high-efficiency environment-friendly sealing agent for aluminum and an aluminum alloy. The formula of the sealing agent comprises, by weight, 3%-15%of sodium acetate, 0%-2% of lithium acetate, 0.2%-5% of sodium benzoate, 0%-2% of urea, 5%-30% of a stabilizer, 0.5%-10% of a dispersing agent, 0%-15% of a complexing agent, 0.5%-10% of a pH buffer agent, 0%-10% of a corrosion inhibitor and the balance deionized water. According to the normal-temperature sealing agent, the solution system is stable; a hole sealing film is compact; the hole sealing agent is small in consumption and long in service life; the surface of a workpiece subjected to hole sealing is smooth and bright, is free of color change, does not generate powder, is capable of effectively preventing fingerprints and can achieve oil stain resistance; the problems that the surface of an aluminum product subjected to hole sealing by a hole sealing agent used in the existing industrial production is not enough in brightness, is relatively dark in color, and is high in hydrophilic performance and prone to generate water stains after being cleaned and dried are solved, and theproblem that a lot of products generate white ash is also solved; and the strength, the hardness and the corrosion resistance of the workpiece are improved.

Description

technical field [0001] The invention belongs to the technical field of metal surface corrosion protection, and in particular relates to an environment-friendly sealing agent for aluminum and aluminum alloys which is stable at room temperature and high-efficiency. Background technique [0002] Aluminum alloys have the advantages of light weight, strong corrosion resistance, and good thermal and electrical conductivity, and are widely used in aviation, aerospace, automobiles, machinery manufacturing, and civil industries. Aluminum alloy products have a disadvantage - they are easy to be corroded. In order to avoid corrosion of aluminum profiles, the surface treatment is generally anodized, which can significantly improve the corrosion resistance of aluminum and its alloys, and increase the hardness and durability of the surface of aluminum and its alloys. abrasion and corrosion resistance. However, the oxide film layer is porous and has strong chemical activity. The aluminum...

Claims

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Application Information

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IPC IPC(8): C25D11/24
CPCC25D11/246
Inventor 王振兴郑建陈春雷
Owner JIANGSU FEITUO INTERFACE ENG TECH CO LTD
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