CN115261964A - Degreasing cleaning agent - Google Patents
Degreasing cleaning agent Download PDFInfo
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- CN115261964A CN115261964A CN202210943004.8A CN202210943004A CN115261964A CN 115261964 A CN115261964 A CN 115261964A CN 202210943004 A CN202210943004 A CN 202210943004A CN 115261964 A CN115261964 A CN 115261964A
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- degreasing
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- cleaning
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
- C25F1/02—Pickling; Descaling
- C25F1/04—Pickling; Descaling in solution
Abstract
The invention relates to a degreasing cleaning agent, which comprises the following components in parts by weight: 30-60 parts of sodium pyrophosphate; 10-30 parts of sodium citrate; 10-30 parts of corrosion inhibitor; 10-20 parts of a surfactant; 5-15 parts of choline nitrate; 5-15 parts of trifluoroacetyl. The product is powder and is easily dissolved in water. Under the condition of not adding a chelating agent, a specific surfactant and a corrosion inhibitor are selected, and the degreasing and oil removing capability is improved by utilizing the cooperation effect of choline and other reagents. The cleaning agent is suitable for cleaning metals such as aluminum alloy, iron materials and the like, has strong degreasing and deoiling capacity, and has better effect if ultrasonic waves exist.
Description
Technical Field
The invention relates to a degreasing cleaning agent.
Background
Degreasing is also called as degreasing, and before electroplating, coating, anodizing and passivating treatment, the metal parts must be cleaned of greasy dirt on the surface, which may affect the quality of the subsequent processes. The degreasing cleaning agent is mainly used for removing oil stains on the surface of an object, and comprises: alkaline degreasing cleaning agent, emulsion degreasing cleaning agent and solvent degreasing cleaning agent.
The degreasing cleaning agent containing the surfactant mainly depends on the emulsification for removing the oil dirt on the metal surface, and the surfactant with a low HLB value is preferably selected. However, these substances are not easy to rinse due to their poor water solubility, and often leave an adsorption film on the surface of the laundry. In the prior art, when the degreasing cleaning agent adopting the conventional surfactant faces a tank liquor containing a large amount of metal salt, the degreasing effect of the degreasing cleaning agent is poor.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a degreasing cleaning agent, which comprises the following components in parts by weight:
30-60 parts of sodium pyrophosphate;
10-30 parts of sodium citrate;
10-30 parts of corrosion inhibitor;
10-20 parts of a surfactant;
5-15 parts of choline nitrate;
5-15 parts of trifluoroacetyl.
The surfactant is a carboxylate anionic surfactant.
The corrosion inhibitor is a sulfonate copolymer.
The mass ratio of the choline nitrate to the trifluoroacetyl is 1:1-3.
The preparation method of the degreasing cleaning agent comprises the following steps:
adding 100 parts by weight of solvent, 10-30 parts by weight of corrosion inhibitor, 10-20 parts by weight of surfactant and 5-15 parts by weight of trifluoroacetyl into a reaction kettle, uniformly stirring, adjusting the pH value to weak acidity, heating to 80-120 ℃, dropwise adding 5-15 parts by weight of choline nitrate at the stirring speed of 100-300rpm, drying and cooling after dropwise adding is finished, adding 30-60 parts by weight of sodium pyrophosphate and 10-30 parts by weight of sodium citrate, and uniformly stirring to obtain the degreasing cleaning agent.
The solvent is one or more selected from water, methanol, ethanol and propylene glycol.
A degreasing process comprising the steps of:
a pre-cleaning step, wherein a NaOH solution with the concentration of 1-3wt% is adopted, and the pre-cleaning temperature is 40-60 ℃;
chemical degreasing, namely adopting a degreasing cleaning agent with the concentration of 5-8 wt%; the degreasing temperature is 40-60 ℃;
a first cleaning step; cleaning the metal surface by adopting a clean water spraying washing or scrubbing mode;
an electrolytic degreasing step; carrying out degreasing treatment on the metal surface by adopting an electrolysis mode;
a second cleaning step; and cleaning the metal surface by adopting a clean water spraying washing or scrubbing mode.
The electrolytic current is 2550-2650A, the current density is 14-16A/d square meter, the electrode is reversed every 30 minutes, and the electrolytic temperature is 60-80 ℃.
The product of the invention has the following beneficial effects:
1. the product is powder and is easily dissolved in water. Under the condition of not adding a chelating agent, a specific surfactant and a corrosion inhibitor are selected, and the degreasing and oil removing capability is improved by utilizing the cooperation effect of the choline and a eutectic solvent of other reagents. The cleaning agent is suitable for cleaning metals such as aluminum alloy, iron materials and the like, has strong degreasing and deoiling capacity, and has better effect if ultrasonic waves exist.
2. The cleaned workpiece is bright and has no spots. The cleaning agent is suitable for cleaning workpieces with various pollutants such as mineral oil, stamping oil, polishing wax and the like.
The above-described and other features, aspects, and advantages of the present application will become more apparent with reference to the following detailed description.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention.
Unless defined otherwise, technical or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and in the claims of the present application does not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one.
The invention provides a degreasing cleaning agent which comprises the following components in parts by weight:
30-60 parts of sodium pyrophosphate;
10-30 parts of sodium citrate;
10-30 parts of corrosion inhibitor;
10-20 parts of a surfactant;
5-15 parts of choline nitrate;
5-15 parts of trifluoroacetyl.
In a preferred embodiment, the surfactant is a carboxylate anionic surfactant. As a preferred embodiment, the corrosion inhibitor is a sulfonate copolymer. Both are chosen because they are larger molecules that facilitate the interaction between the components. Reduce the problems caused by heavy metal ions. The mass ratio of the choline nitrate to the trifluoroacetyl is 1:1-3.
As a preferred embodiment, the preparation method of the degreasing cleaning agent comprises the following steps:
adding 100 parts by weight of solvent, 10-30 parts by weight of corrosion inhibitor, 10-20 parts by weight of surfactant and 5-15 parts by weight of trifluoroacetyl into a reaction kettle, uniformly stirring, adjusting the pH value to weak acidity, heating to 80-120 ℃, dropwise adding 5-15 parts by weight of choline nitrate at the stirring speed of 100-300rpm, drying and cooling after dropwise adding is finished, adding 30-60 parts by weight of sodium pyrophosphate and 10-30 parts by weight of sodium citrate, and uniformly stirring to obtain the degreasing cleaning agent. As a preferred embodiment, the solvent is one or more selected from water, methanol, ethanol, and propylene glycol.
A degreasing process, comprising the steps of:
a pre-cleaning step, wherein a NaOH solution with the concentration of 1-3wt% is adopted, and the pre-cleaning temperature is 40-60 ℃;
chemical degreasing, namely adopting a degreasing cleaning agent with the concentration of 5-8 wt%; the degreasing temperature is 40-60 ℃;
a first cleaning step; cleaning the metal surface by adopting a clean water spraying washing or scrubbing mode;
an electrolytic degreasing step; carrying out degreasing treatment on the metal surface by adopting an electrolysis mode;
a second cleaning step; and cleaning the metal surface by adopting a clean water spraying washing or scrubbing mode.
The electrolytic current is 2550-2650A, the current density is 14-16A/d square meter, the electrode is commutated every 30 minutes, and the electrolytic temperature is 60-80 ℃.
The product is powder and is easily dissolved in water. Under the condition of not adding a chelating agent, a specific surfactant and a corrosion inhibitor are selected, and the degreasing and oil removing capability is improved by utilizing the cooperation effect of choline and other reagents. The cleaning agent is suitable for cleaning metals such as aluminum alloy, iron materials and the like, has strong degreasing and deoiling capacity, and has better effect if ultrasonic waves exist. The cleaned workpiece is bright and has no spots. The cleaning agent is suitable for cleaning workpieces with various pollutants such as mineral oil, stamping oil, polishing wax and the like.
Preparation of degreased cleaning agent
Adding 100 parts by weight of solvent, 10-30 parts by weight of corrosion inhibitor, 10-20 parts by weight of surfactant and 5-15 parts by weight of trifluoroacetyl into a reaction kettle, uniformly stirring to adjust the pH value to subacidity, heating to 80-120 ℃, dropwise adding 5-15 parts by weight of choline nitrate at a stirring speed of 100-300rpm, drying and cooling after dropwise adding is finished, adding 30-60 parts by weight of sodium pyrophosphate and 10-30 parts by weight of sodium citrate, and uniformly stirring to obtain the degreasing cleaning agent. The solvent is selected from one or more of water, methanol, ethanol and propylene glycol.
A degreasing process, comprising the steps of:
a pre-cleaning step, wherein a NaOH solution with the concentration of 1-3wt% is adopted, and the pre-cleaning temperature is 40-60 ℃;
chemical degreasing, namely adopting a degreasing cleaning agent with the concentration of 5-8 wt%; the degreasing temperature is 40-60 ℃;
a first cleaning step; cleaning the metal surface by adopting a clean water spraying washing or scrubbing mode;
an electrolytic degreasing step; degreasing the metal surface by adopting an electrolysis mode;
a second cleaning step; and cleaning the metal surface by adopting a clean water spraying washing or scrubbing mode.
The electrolytic current is 2550-2650A, the current density is 14-16A/d square meter, the electrode is commutated every 30 minutes, and the electrolytic temperature is 60-80 ℃.
Example 1
Adding 100 parts by weight of water, 20 parts by weight of sulfonate copolymer, 15 parts by weight of carboxylate anionic surfactant and 10 parts by weight of trifluoroacetyl into a reaction kettle, uniformly stirring, adjusting the pH value to weak acidity, heating to 100 ℃, dropwise adding 10 parts by weight of choline nitrate at the stirring speed of 200rpm, drying and cooling after dropwise adding, adding 50 parts by weight of sodium pyrophosphate and 20 parts by weight of sodium citrate, and uniformly stirring to obtain the degreasing cleaning agent.
A pre-cleaning step, wherein a 2wt% NaOH solution is adopted, and the pre-cleaning temperature is 40-60 ℃;
chemical degreasing, namely adopting 6wt% degreasing cleaning agent; the degreasing temperature is 40-60 ℃;
a first cleaning step; cleaning the metal surface by adopting a clean water spraying washing or scrubbing mode;
an electrolytic degreasing step; degreasing the metal surface by adopting an electrolysis mode;
a second cleaning step; and cleaning the metal surface by adopting a clean water spraying washing or scrubbing mode.
The electrolytic current is 2550-2650A, the current density is 14-16A/d square meter, the electrode is commutated every 30 minutes, and the electrolytic temperature is 60-80 ℃.
Example 2
Adding 100 parts by weight of water, 20 parts by weight of sulfonate copolymer, 15 parts by weight of carboxylate anionic surfactant and 12 parts by weight of trifluoroacetyl into a reaction kettle, uniformly stirring, adjusting the pH value to weak acidity, heating to 100 ℃, dropwise adding 10 parts by weight of choline nitrate at the stirring speed of 200rpm, drying and cooling after dropwise adding, adding 50 parts by weight of sodium pyrophosphate and 20 parts by weight of sodium citrate, and uniformly stirring to obtain the degreasing cleaning agent.
A pre-cleaning step, wherein a 2wt% NaOH solution is adopted, and the pre-cleaning temperature is 40-60 ℃;
chemical degreasing, namely adopting 6wt% degreasing cleaning agent; the degreasing temperature is 40-60 ℃;
a first cleaning step; cleaning the metal surface by adopting a clean water spraying washing or scrubbing mode;
an electrolytic degreasing step; carrying out degreasing treatment on the metal surface by adopting an electrolysis mode;
a second cleaning step; and cleaning the metal surface by adopting a clean water spraying washing or scrubbing mode.
The electrolytic current is 2550-2650A, the current density is 14-16A/d square meter, the electrode is commutated every 30 minutes, and the electrolytic temperature is 60-80 ℃.
Comparative examples 1 to 3
Adding 100 parts by weight of water, 20 parts by weight of corrosion inhibitor, 15 parts by weight of surfactant and 10 parts by weight of trifluoroacetyl into a reaction kettle, uniformly stirring to adjust the pH value to subacidity, heating to 100 ℃, dropwise adding 10 parts by weight of choline nitrate at a stirring speed of 200rpm, drying and cooling after dropwise adding, adding 50 parts by weight of sodium pyrophosphate and 20 parts by weight of sodium citrate, and uniformly stirring to obtain the degreasing cleaning agent.
A pre-cleaning step, wherein a 2wt% NaOH solution is adopted, and the pre-cleaning temperature is 40-60 ℃;
chemical degreasing, namely adopting a degreasing cleaning agent with the concentration of 6 wt%; the degreasing temperature is 40-60 ℃;
a first cleaning step; cleaning the metal surface by adopting a clean water spraying washing or scrubbing mode;
an electrolytic degreasing step; degreasing the metal surface by adopting an electrolysis mode;
a second cleaning step; and cleaning the metal surface by adopting a clean water spraying washing or scrubbing mode.
The electrolytic current is 2550-2650A, the current density is 14-16A/d square meter, the electrode is reversed every 30 minutes, and the electrolytic temperature is 60-80 ℃.
Comparative examples 1-2 are the same as example 1 except that alkylphenol ethoxylates and benzotriazole are used instead of the original surfactant and corrosion inhibitor, respectively. Comparative example 3 is the same as example 1 except that choline nitrate was not added.
The experimental method comprises the following steps:
cleaning a clean metal test piece with ethanol, weighing, putting the metal test piece into artificial oil stain, and drying to obtain a constant weight. And (3) putting the oiled test piece into the tank liquor for soaking for three minutes, rinsing with distilled water, drying and weighing. And calculating the defatting rate. The temperature of the bath solution is 50 ℃, and the content of zinc and copper ions in the bath solution is 2g/L.
The degreasing rates of examples 1 to 2 of the present invention and comparative examples 1 to 3 were 99.5%, 99.9%, 95.5%, 97.6%, and 89.3%.
It can be seen that the invention selects the specific surfactant and corrosion inhibitor, and utilizes the cooperation of choline and other reagents to improve degreasing ability.
While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and the description is given here only for clarity, and those skilled in the art should integrate the description, and the embodiments may be combined appropriately to form other embodiments understood by those skilled in the art.
Claims (8)
1. The degreasing cleaning agent is characterized by comprising the following substances in parts by weight:
30-60 parts of sodium pyrophosphate;
10-30 parts of sodium citrate;
10-30 parts of corrosion inhibitor;
10-20 parts of a surfactant;
5-15 parts of choline nitrate;
5-15 parts of trifluoroacetyl.
2. The degreasing cleaning agent as claimed in claim 1, wherein the surfactant is a carboxylate anionic surfactant.
3. The degreasing cleaning agent as claimed in claim 1, wherein the corrosion inhibitor is a sulfonate copolymer.
4. The degreasing cleaning agent as claimed in claim 1, wherein the mass ratio of the choline nitrate to the trifluoroacetyl group is 1:1-3.
5. The degreasing cleaning agent as claimed in claim 1, wherein the preparation method of the degreasing cleaning agent comprises the following steps:
adding 100 parts by weight of solvent, 10-30 parts by weight of corrosion inhibitor, 10-20 parts by weight of surfactant and 5-15 parts by weight of trifluoroacetyl into a reaction kettle, uniformly stirring to adjust the pH value to subacidity, heating to 80-120 ℃, dropwise adding 5-15 parts by weight of choline nitrate at a stirring speed of 100-300rpm, drying and cooling after dropwise adding is finished, adding 30-60 parts by weight of sodium pyrophosphate and 10-30 parts by weight of sodium citrate, and uniformly stirring to obtain the degreasing cleaning agent.
6. The degreasing cleaning agent as claimed in claim 5, wherein the solvent is selected from one or more of water, methanol, ethanol, and propylene glycol.
7. A degreasing process, comprising the steps of:
a pre-cleaning step, wherein a NaOH solution with the concentration of 1-3wt% is adopted, and the pre-cleaning temperature is 40-60 ℃;
chemical degreasing, namely adopting a degreasing cleaning agent with the concentration of 5-8 wt%; the degreasing temperature is 40-60 ℃;
a first cleaning step; cleaning the metal surface by adopting a clean water spraying washing or scrubbing mode;
an electrolytic degreasing step; degreasing the metal surface by adopting an electrolysis mode;
a second cleaning step; and cleaning the metal surface by adopting a clean water spraying washing or scrubbing mode.
8. The degreasing process according to claim 7, wherein the electrolysis current is 2550-2650A, the current density is 14-16A/d square meter, the electrode is reversed every 30 minutes, and the electrolysis temperature is 60-80 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210943004.8A CN115261964A (en) | 2022-08-08 | 2022-08-08 | Degreasing cleaning agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210943004.8A CN115261964A (en) | 2022-08-08 | 2022-08-08 | Degreasing cleaning agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115261964A true CN115261964A (en) | 2022-11-01 |
Family
ID=83749259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210943004.8A Pending CN115261964A (en) | 2022-08-08 | 2022-08-08 | Degreasing cleaning agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115261964A (en) |
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2022
- 2022-08-08 CN CN202210943004.8A patent/CN115261964A/en active Pending
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