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Environment-friendly constant-temperature hole sealing agent for aluminum and aluminum alloy and hole sealing technique thereof

A technology of aluminum alloy and sealing agent, applied in the direction of electrolytic coating, surface reaction electrolytic coating, coating, etc., can solve the problems of uneven surface of aluminum workpiece, harsh sealing conditions, loss of gloss of sealing film, etc. Good stability and penetration effect, low requirements for sealing conditions, and compact sealing film

Active Publication Date: 2018-03-16
JIANGSU FEITUO INTERFACE ENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sealing conditions of these patents are relatively harsh, the energy consumption is high, the bath solution is not stable, and the sealing effect is difficult to meet the requirements of industrial production.
[0004] With the development of large-scale industrial production and the development of aluminum and aluminum alloy oxide film technology, higher requirements are placed on the quality of sealing holes. According to the research in the industrial production process, the current nickel-free sealing technology in industrial production is There are problems such as loss of gloss and poor gloss retention of the sealing film; uneven surface of the aluminum workpiece after sealing, easy to whiten and powder; slow sealing speed, high weight loss during detection of sealing; poor energy saving effect, short life of the bath solution, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] An environment-friendly room-temperature sealing agent for aluminum and aluminum alloys, based on the total weight, including the following components in weight percentages: 5% magnesium acetate, 0.5% cobalt acetate, 5% tripropylene glycol methyl ether, and 8% polyvinylpyrrolidone , fatty acid methyl ester 3%, hydroxyalkylphenol polyoxyethylene ether 4%, accelerator 1%, sodium citrate 2%, boric acid 2%, and the balance is deionized water. Among them, the accelerator is an aliphatic derivative, and the R in its molecular structural formula 1 is hydroxyethyl, R 2 is hydroxyethyl, R 3 is amino, R 4 is methyl, R 5 is methyl, n=1.

[0024] The sealing process of the above-mentioned aluminum and aluminum alloy environmental protection normal temperature sealing agent comprises the following steps:

[0025] (1) Anodize the aluminum workpiece after pretreatment to form a 10 μm thick oxide film;

[0026] (2) Immerse the aluminum product workpiece with the oxide film layer ...

Embodiment 2

[0032] An environment-friendly room-temperature sealing agent for aluminum and aluminum alloys, based on the total weight, including the following components in weight percentages: 8% magnesium acetate, 1% cobalt acetate, 8% tripropylene glycol methyl ether, fatty alcohol polyoxyethylene ether 10%, sodium dodecyl diphenyl ether disulfonate 3%, accelerator 1%, tartaric acid 2%, sodium tripolyphosphate 2%, and the balance is deionized water. Among them, the accelerator is an aliphatic derivative, and the R in its molecular structural formula 1 is hydroxyethyl, R 2 is hydroxyethyl, R 3 is amino, R 4 is methyl, R 5 is methyl, n=1.

[0033] The sealing process of the above-mentioned aluminum and aluminum alloy environmental protection normal temperature sealing agent comprises the following steps:

[0034] (1) Anodize the aluminum workpiece after pretreatment to form a 10 μm thick oxide film;

[0035] (2) Immerse the aluminum product workpiece with the oxide film layer in the...

Embodiment 3

[0041] An environment-friendly room-temperature sealing agent for aluminum and aluminum alloys, based on the total weight, including the following components in weight percentages: 10% magnesium acetate, 1.5% cobalt acetate, 8% tripropylene glycol methyl ether, cetylbenzenesulfonate Sodium acid 5%, fatty acid methyl ester 3%, hydroxyalkylphenol polyoxyethylene ether 7%, thiourea 1%, polyethylene glycol 2%, acetic acid 2%, sodium hexametaphosphate 2%, the balance is deionized water. Among them, the accelerator is an aliphatic derivative, and the R in its molecular structural formula 1 is a hydrogen atom, R 2 is methyl, R3 is hydroxyl, R 4 is methyl, R 5 For amino, n=2.

[0042] The sealing process of the above-mentioned aluminum and aluminum alloy environmental protection normal temperature sealing agent comprises the following steps:

[0043] (1) Anodize the aluminum workpiece after pretreatment to form a 12 μm thick oxide film;

[0044] (2) Immerse the aluminum product ...

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PUM

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Abstract

The invention provides an environment-friendly constant-temperature hole sealing agent for aluminum and an aluminum alloy. The environment-friendly constant-temperature hole sealing agent comprises the following components of, by total weight, 3%-15% of magnesium acetate, 0%-10% of cobaltous acetate, 5%-15% of tripropylene glycol methyl ether, 5%-15% of surfactants, 0%-10% of dust inhibiting agents, 0%-8% of accelerants, 0.5%-10% of pH buffer agents, 0%-10% of corrosion inhibitors and the balance deionized water. The environment-friendly constant-temperature hole sealing agent is good in stability and permeation effect; a hole sealing film is dense and can completely seal gaps on the surface of a workpiece; the hole sealing condition requirement is low, after hole sealing, the surface of the workpiece is flat, bright and free of discoloring, powder forming is avoided, oil fouling resistance and fingerprint resistance are achieved, and the strength, hardness and corrosion resistance ofthe workpiece are improved; the environment-friendly constant-temperature hole sealing agent does not contain elements of nickel, fluorine, chromium and the like and is safe and environmentally friendly, pollution to the operation environment is avoided, and damage to health of a human body is avoided; and the cost is low, energy consumption is less, and the environment-friendly constant-temperature hole sealing agent is suitable for being produced industrially on a large scale.

Description

technical field [0001] The invention belongs to the technical field of metal surface corrosion protection treatment, and in particular relates to an aluminum and aluminum alloy environment-friendly normal-temperature sealing agent and a sealing process thereof. 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 composed of amorphous alumina with a large number of por...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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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