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Aluminium coiled material coating acid cleaning agent

An acid cleaning agent, aluminum coil technology, applied in the field of industrial cleaning chemicals, can solve problems such as easy decomposition, affecting coating production, etc.

Inactive Publication Date: 2008-02-06
SOUTHWEST ALUMINUM GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current cleaning agent products are easy to decompose beyond the service life, which affects the normal coating production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Get 243g of alkylphenol polyoxyethylene ether, 7g of sodium alkylbenzenesulfonate, 450g of sulfuric acid (density 1.84, 98%), 70g of citric acid, 6g of diethylaminoethanol, and 8.5g of thiourea. First, stir the alkylphenol polyoxyethylene ether and sodium alkylbenzene sulfonate thoroughly, the cloud point is about 45°C, then add water to 1 liter to make component A. Take 350g of hydrofluoric acid (density 1.15, 40%), add water to 1 liter, and make B component.

[0040] Dilute the prepared component A with water to 1.2% (V / V), dilute component B with water to 0.010% (V / V), mix the diluted components A and B, and heat to 55°C . Take an aluminum alloy 1100 sample, spray and clean it for 5.5 seconds, and then wash it with water to keep the Al 3+ When the concentration is below 2g / L, the surface of the aluminum alloy is bright, free of oil and oxide.

Embodiment 2

[0042] Get 175g of alkylphenol polyoxyethylene ether, 5g of sodium alkylbenzenesulfonate, 480g of sulfuric acid (density 1.84, 98%), 65g of citric acid, 5g of diethylaminoethanol, and 8g of thiourea. First, stir the alkylphenol polyoxyethylene ether and the sodium alkylbenzene sulfonate thoroughly, the cloud point is about 35°C, then add water to 1 liter to make component A. Take 250g of hydrofluoric acid (density 1.15, 40%), add water to 1 liter, and make B component.

[0043] Dilute the prepared component A with water to 1.8% (V / V), dilute component B with water to 0.014% (V / V), mix the diluted components A and B, and heat to 55°C . Then wash with water, the surface of the aluminum alloy 1100 sample has a little oil and oxides; then spray the cleaning agent for cleaning for 25 seconds, and then wash with water to keep Al 3+ The concentration is below 3g / L. After cleaning, the surface of the aluminum alloy is bright, free of oil and oxide.

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PUM

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Abstract

The invention discloses the acid cleaning reagent cleaning the coating layer of the aluminum coiling material. The said cleaning reagent is composed of the compound containing A, B group elements; the said A group element is the mixing water solution composed of the below thickness material: the surface vivid reagent 150-300g / L, the vitriol 400-500g / L, the resembling reagent 50-80g / L, the dispersing reagent 4-6g / L and the stably reagent 7-10g / L; the said the B group element is 150-300g / L hydrofluoric acid solution. The cleaning reagent of the invention cleans the aluminum, the surface is clean, the transforming film after the chemical treatment on the aluminum strip is series and even, the eroding rate to the aluminum material is low, so it can substitute the same overseas production and reduce the cost. The cleaning reagent has many merits such as the efficiency of the decontamination, the wide adapting range, the improvement of the producing efficiency and the notable economic benefit.

Description

technical field [0001] The invention relates to an industrial cleaning chemical, in particular to an acid cleaning agent for aluminum coil coating. Background technique [0002] At present, before coating the aluminum material, the aluminum material must be thoroughly cleaned to remove the oil stains, aluminum chips and natural oxide film on the surface of the aluminum material, which is to ensure the quality of the chemical conversion film in the next step The premise is also the basis for ensuring the performance of the coating (such as adhesion, corrosion resistance, etc.). The surface of naturally oxidized aluminum is a very irregular, rather loose aluminum oxide layer, which is not conducive to bonding. Therefore, it is necessary to remove the native alumina layer. The current cleaning agent products are easy to decompose beyond the service life, thus affecting the normal coating production. Contents of the invention [0003] The purpose of the present invention is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/12
Inventor 周仁良蒲以明林林
Owner SOUTHWEST ALUMINUM GRP
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