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Method for preparing degreasing agent before treatment of metal piece nano conversion film

A technology of conversion film and degreasing agent, applied in the field of degreasing agent for surface treatment of metal parts, can solve the problems of difficulty in cleaning, corroded substrate, high cost, etc., and achieves the effect of easy cleaning, easy degradation treatment, and small environmental impact

Active Publication Date: 2012-03-28
ZHEJIANG WUYUAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned conventional metal degreasing agents still have high alkalinity sodium hydroxide, phosphate and silicate, which will corrode the substrate on metal parts, make wastewater treatment difficult, and have high costs, and are easy to adsorb on metal surfaces and are difficult to clean. Detrimental effect on metal surface cleanliness prior to installation
Chinese patent CN101381876A "Phosphorus-free and nitrogen-free biodegradable metal degreasing powder and its preparation method" adopts sodium orthosilicate instead of phosphate, and this component is easy to be adsorbed on the surface of metal parts and difficult to remove completely when in use, and the working fluid Due to the presence of silicates, it is easy to produce gelatinous substances after being left for a certain period of time

Method used

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  • Method for preparing degreasing agent before treatment of metal piece nano conversion film

Examples

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Effect test

Embodiment 1

[0012] A method for preparing a degreasing agent before treatment of a metal part nano-conversion film is characterized in that the following steps are adopted:

[0013] A) Measured by 100 parts by weight, first add 20 parts of water in the mixer, and while stirring, add 50 parts of soda ash, 1 part of alkyl glycosides, 1 part of dodecyl fatty alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene 5 parts of sodium oxyethylene ether sulfate, 5 parts of sodium fatty acid methyl ester sulfonate, 0.1 part of JFC penetrant, 0.1 part of chelating agent, and then add an appropriate amount of water; continue to stir for 10 minutes, and the above-mentioned added materials become a well-mixed degreaser; The alkyl glycoside adopts the alkyl glycoside whose alkyl carbon chain length is C8-10, or the alkyl glycoside whose alkyl carbon chain length is C12-14, or its mixture; the chelating agent adopts EDTA sodium salt or its mixture;

[0014] B) The degreaser prepared in step A) is p...

Embodiment 2

[0019] A method for preparing a degreasing agent before treatment of a metal part nano-conversion film is characterized in that the following steps are adopted:

[0020] A) Measured by 100 parts by weight, first add 70 parts of water in the mixer, and while stirring, add 10 parts of soda ash, 10 parts of alkyl glycosides, 10 parts of dodecyl fatty alcohol polyoxyethylene ether, fatty alcohol polymer 0.1 part of sodium oxyethylene ether sulfate, 0.1 part of sodium fatty acid methyl ester sulfonate, 1.5 part of JFC penetrant, 1.5 part of chelating agent, and then add an appropriate amount of water; continue to stir for 10 minutes, the above-mentioned added materials become a well-mixed degreaser; The alkyl glycoside adopts the alkyl glycoside whose alkyl carbon chain length is C8-10, or the alkyl glycoside whose alkyl carbon chain length is C12-14, or its mixture; the chelating agent adopts EDTA sodium salt or its mixture;

[0021] B) The degreaser prepared in step A) is package...

Embodiment 3

[0024] A method for preparing a degreasing agent before treatment of a metal part nano-conversion film is characterized in that the following steps are adopted:

[0025] A) Measured with 100 parts by weight, first add 45 parts of water in the mixer, add 30 parts of soda ash, 5 parts of alkyl glycosides, 6 parts of dodecyl fatty alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether in turn while stirring 2.5 parts of sodium oxyethylene ether sulfate, 2.5 parts of sodium fatty acid methyl ester sulfonate, 0.8 part of JFC penetrant, 0.8 part of chelating agent, and then add an appropriate amount of water; continue to stir for 10 minutes, and the above-mentioned added materials become a well-mixed degreaser; The alkyl glycoside adopts the alkyl glycoside whose alkyl carbon chain length is C8-10, or the alkyl glycoside whose alkyl carbon chain length is C12-14, or its mixture; the chelating agent adopts EDTA sodium salt or its mixture;

[0026] B) The degreaser prepare...

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Abstract

The invention discloses a method for preparing a degreasing agent before treatment of a metal piece nano conversion film. The prepared degreasing agent comprises alkyl glucoside, fatty acid methyl ester sulfonate, fatty alcohol polyoxyethylene ether sulfate, dodecyl fatty alcohol polyoxyethylene ether, java foundation class (JFC) penetrating agent and easily biodegradable surfactant serving as main components; and soda ash is used as an alkali auxiliary agent, a little amount of chelating agent is added, and the balance is water. Compared with the prior art, the method has the following advantages that: 1) by adopting the high biodegradable surfactant, the degreasing agent is non-toxic and easy for degradation treatment, and has no harm to the environment; 2) because phosphates such as sodium tripolyphosphate, sodium polyphosphate and the like are not contained, no phosphorus-containing wastewater is contained, subsequent wastewater treatment is not needed, and the method has no harm to the environment; 3) because silicate or metasilicate is not contained, so the degreasing agent is easy for cleaning; and 4) the degreasing agent can meet the technical requirement of surface cleanliness before the nano conversion film treatment before metal piece coating.

Description

technical field [0001] The invention relates to a degreasing agent for surface treatment of metal parts, in particular to a preparation method of the degreasing agent before nano-conversion film treatment of metal parts. Background technique [0002] Since the phosphating treatment method of metal parts has brought a greater degree of harm to the environment and health, the use of environmentally friendly pre-coating treatment methods has become a trend. Usually the thickness of this type of conversion coating is 20-500nm, so there are high technical requirements for the cleanliness of the surface of metal parts, only low residual amount (0.1-0.01mg / cm 2 ) can ensure the effective combination of the organic coating and the nano-conversion coating on the surface of the metal substrate. Commonly used cleaning and degreasing agents contain organic solvents, surfactants and inorganic alkaline substances. At present, metal cleaning and degreasing agents mixed with sodium hydrox...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23G1/14
Inventor 钟金环杨岩黄乐王一建
Owner ZHEJIANG WUYUAN TECH CO LTD
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