CN111334808A - Steel hot degreasing powder and preparation method thereof - Google Patents
Steel hot degreasing powder and preparation method thereof Download PDFInfo
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- CN111334808A CN111334808A CN201911367492.7A CN201911367492A CN111334808A CN 111334808 A CN111334808 A CN 111334808A CN 201911367492 A CN201911367492 A CN 201911367492A CN 111334808 A CN111334808 A CN 111334808A
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/19—Iron or steel
Abstract
The invention relates to the technical field of metal cleaning agents, in particular to steel hot degreasing powder. The steel hot degreasing powder is prepared from the following raw materials in parts by weight: 12-18 parts of anhydrous sodium metasilicate, 10-15 parts of tripolyphosphoric acid, 3.1-9 parts of light soda ash, 19-25 parts of heavy soda ash, 1.5-4 parts of sodium gluconate, 3.5-5.2 parts of anhydrous sodium sulphate, 2-4 parts of soap powder, 1.2 parts of peregal O-250.9, 0.7-1.1 parts of dipropylene glycol methyl ether, 0.4-1.2 parts of odorless kerosene, 15-36 parts of sodium hydroxide and 4.2-5.7 parts of sodium lignosulfonate. The degreasing powder is suitable for chemical degreasing of ferrous metals, has good cleaning effect and emulsifying capacity on saponified oil and emulsified oil, is particularly suitable for cleaning mineral oil and mixed oil stains, has good washability, can be used for medium-temperature degreasing, and can be used for normal-temperature cleaning of simple oil stains.
Description
Technical Field
The invention relates to the technical field of metal cleaning agents, in particular to steel hot degreasing powder and a preparation method thereof.
Background
During the manufacturing, transportation, storage and use of the metal workpiece, the surface of the metal workpiece is coated with grease due to the requirements of machining, rust prevention and the like. These fats and oils are based on mineral fats and oils and vegetable fats, and are added with various organic or inorganic additive components. Therefore, in the surface treatment of the metal material, degreasing is an important process, and the degree of degreasing of the metal surface directly affects the subsequent treatment quality of the workpiece.
The components of the grease on the surface of the metal workpiece are complex, and a type of saponified oil mainly comprising fatty acid glyceride can be removed through saponification with alkali; another type is mineral oil, also known as unsaponifiable oil, which can be removed by emulsification. The metal surface cleaning agent comprises a water-based cleaning agent, a solvent cleaning agent and an alkaline cleaning agent. The solvent cleaning agent is divided into a petroleum solvent cleaning agent and a chlorinated hydrocarbon solvent cleaning agent.
The degreasing mechanism is that the degreasing agent has saponification, solubilization, wetting, dispersion, emulsification and other actions on various grease, so that the grease is separated from the surface of a workpiece and becomes a soluble substance or is emulsified, dispersed and uniformly and stably exists in a tank liquor. The degreasing quality is evaluated mainly by taking the standard that the surface of a degreased workpiece cannot have visual grease, emulsion and other dirt, and the surface of the degreased workpiece is completely wetted by water after being washed. However, the raw materials and the proportion used in the prior degreasing powder are not reasonable enough, the treatment time is long, the degreasing effect is poor, and the degreasing powder is not easy to clean, so that the development of a novel high-efficiency metal degreasing powder is urgently needed.
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, the present invention aims to provide a high-efficiency hot degreasing powder for steel, which is suitable for chemical degreasing of ferrous metals, has good cleaning effect and emulsifying capacity for saponified oil and emulsified oil, is particularly suitable for cleaning mineral oil and mixed oil stains, has good water washability, can be used for medium temperature degreasing, and can be used for normal temperature cleaning of simple oil stains.
In order to achieve the technical effects, the invention adopts the technical scheme that:
the hot degreasing powder for the steel is prepared from the following raw materials in parts by weight:
12-18 parts of anhydrous sodium metasilicate, 10-15 parts of tripolyphosphoric acid, 3.1-9 parts of light soda ash, 19-25 parts of heavy soda ash, 1.5-4 parts of sodium gluconate, 3.5-5.2 parts of anhydrous sodium sulphate, 2-4 parts of soap powder, 1.2 parts of peregal O-250.9, 0.7-1.1 parts of dipropylene glycol methyl ether, 0.4-1.2 parts of odorless kerosene, 15-36 parts of sodium hydroxide and 4.2-5.7 parts of sodium lignosulfonate.
Preferably, the thermal degreasing powder is prepared from the following raw materials in parts by mass: 15 parts of anhydrous sodium metasilicate, 12 parts of tripolyphosphoric acid, 5 parts of light soda ash, 22 parts of heavy soda ash, 2 parts of sodium gluconate, 4.7 parts of anhydrous sodium sulphate, 3 parts of soap powder, 251 parts of peregal O-251, 1 part of dipropylene glycol methyl ether, 1 part of odorless kerosene, 28 parts of sodium hydroxide and 4.2 parts of sodium lignosulfonate.
Further, the preparation method of the steel hot degreasing powder comprises the following steps:
a. weighing anhydrous sodium metasilicate, tripolyphosphoric acid, light soda ash, heavy soda ash, sodium gluconate, anhydrous sodium sulphate and soap powder according to the formula ratio, and uniformly stirring to obtain powder A;
b. weighing dipropylene glycol methyl ether and odorless kerosene according to the formula ratio, uniformly mixing, adding the mixture into the powder A, and uniformly stirring to obtain powder B;
c. weighing peregal O-25 in the formula ratio, heating to melt, adding into the powder B, and continuously stirring uniformly to obtain powder C;
d. and weighing sodium hydroxide and sodium lignosulphonate according to the formula ratio, respectively adding the sodium hydroxide and the sodium lignosulphonate into the powder C, and uniformly stirring to obtain the steel thermal degreasing powder.
Further: the melting temperature in the step c is 50-65 ℃.
Compared with the prior art, the invention has the following beneficial effects:
1. the cleaning agent is suitable for cleaning ferrous metal, has good cleaning effect and has good cleaning rate at lower concentration.
2. The oil stain remover is prepared by compounding soap powder, peregal O-25 and sodium lignosulfonate as surfactants, has a synergistic effect, optimizes the proportion of the auxiliaries, can achieve a better oil removing effect at a lower temperature, and can basically remove oil stains difficult to remove at a high temperature.
Detailed Description
The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
Examples 1 to 5 were as shown in table 1, and comparative examples 6 to 19 were as shown in table 2, and steel hot-degreased powders were prepared according to the following preparation methods in the amounts as shown in tables 1 and 2, respectively:
table 1: examples 1 to 5 Each component ratio (parts by mass)
Table 2: comparative examples 6 to 10 respective component ratios (parts by mass)
The preparation method comprises the following steps:
s1: firstly, weighing anhydrous sodium metasilicate, tripolyphosphoric acid, light soda ash, heavy soda ash, sodium gluconate, anhydrous sodium sulphate and soap powder according to the formula ratio, adding into a stirrer, and stirring at the speed of 50 revolutions per minute for 5 minutes to obtain powder A;
s2: weighing dipropylene glycol methyl ether and odorless kerosene according to the formula ratio, uniformly mixing, adding into the powder A, and stirring at the same speed for 10min to obtain powder B;
s3: weighing peregal O-25 with the formula ratio, heating to 50 ℃ until the peregal O-25 is completely melted, adding the mixture into the powder B, and continuously stirring at the same speed for 10min to obtain powder C;
s4: and weighing sodium hydroxide and sodium lignosulphonate in the formula ratio, respectively adding the sodium hydroxide and the sodium lignosulphonate into the powder C, and stirring at the same speed for 5min to obtain the steel thermal degreasing powder.
The hot degreased powders of steel prepared in examples 1 to 5 and the degreased powders prepared in examples 6 to 9 were subjected to cleaning experiments according to the following steps:
s1, preparing a steel test piece, namely adopting No. 45 steel with the size of 50mm × 25mm × 5mm as the test piece.
S2: preparation of a test solution: preparing the hot degreasing powder of the steel prepared in the above examples 1-5 into 2% aqueous solution by using deionized water, and respectively recording the numbers of the examples 1-5 as an experimental group A-an experimental group E;
s3: preparing the artificial oil stain according to the following mass ratio formula:
the formula is as follows: 8% of barium petroleum sulfonate, 3.5% of lanolin magnesium soap, 2% of lanolin, 30% of industrial vaseline, 34.5% of No. 20 machine oil, 12% of No. 30 machine oil, 2% of calcium-based lubricating grease and 8% of aluminum oxide;
the preparation method comprises the following steps: weighing industrial vaseline, No. 20 mechanical oil and No. 30 mechanical oil according to the formula amount, mixing, heating to about 120 ℃ for uniform melting, pouring barium petroleum sulfonate, lanolin magnesium soap, lanolin and calcium-based lubricating grease according to the formula amount, and stirring for melting. Controlling the temperature not to exceed 130 ℃, stopping heating after the aluminum oxide powder is completely dissolved, uniformly stirring, cooling to room temperature, and storing in a refrigerator at the temperature of 5-10 ℃ for later use.
S4: and (2) placing the prepared stainless steel test piece in the step S1 in an oven at 40 +/-2 ℃ for drying for 30min, transferring the test piece into a dryer for cooling, weighing to 0.1mg, horizontally placing the weighed test piece on dried filter paper, uniformly coating artificial oil stains to the lower 2/3 part of one side of the test piece by using a knife, leaving the rest surfaces uncoated, wiping off the excessive oil stains on the two sides and the bottom edge of the test piece by using the filter paper, controlling the coating amount of the oil stains to be between 0.08g and 0.20g, placing the coated test piece into a constant-temperature drying oven at 60 +/-2 ℃ for drying for 30min, taking out the test piece after wiping off the oil stains on the bottom edge, cooling in the dryer, and weighing to 0.1 mg.
S5: pouring 400ml of cleaning agent solution into a 500ml beaker, and swinging and washing under the water bath condition of (60 +/-2) DEG C to ensure that the surface of the test piece is vertical to the swinging direction, wherein the swinging and washing conditions are as follows:
soaking for 3min, immediately washing for 3min, taking out the test piece, immediately washing in distilled water at 60 + -2 deg.C for 30s, immediately drying at 40 + -2 deg.C for 2h, taking out, weighing to 0.1mg, calculating the cleaning power according to the following formula, and comparing the cleaning power with the results shown in Table 3.
In the formula, m0Is the mass of the test piece, m1M is the mass of the oil stain coated test piece before cleaning2The unit is gram (g) for the cleaned oil stain coated test piece.
Table 3: comparison of detergency of examples 1 to 5 and comparative examples 6 to 9
| Group of | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Comparative example 6 | Comparative example 7 | Comparative example 8 | Comparative example 9 |
| m0(g) | 48.76 | 49.57 | 49.32 | 49.08 | 48.92 | 49.21 | 48.81 | 48.95 | 48.97 |
| m1(g) | 48.84 | 49.73 | 49.49 | 49.25 | 49.09 | 49.38 | 49.00 | 49.12 | 49.10 |
| m2(g) | 48.78 | 49.61 | 49.33 | 49.14 | 48.94 | 49.29 | 48.92 | 49.05 | 49.01 |
| Detergency (%) | 75.00％ | 75.00% | 94.12％ | 64.71％ | 88.24％ | 52.94％ | 42.11％ | 41.18％ | 53.85％ |
As can be seen from Table 3:
in comparison of examples 2, 3 and 4, the best detergency of example 3 will be described as the best compatibility of the surfactant in example 3, and the highest detergency will be obtained when the amount used is small, and the formula is as follows: 3 parts of soap powder, 251 parts of peregal O-251 and 5 parts of sodium lignosulfonate;
in comparison of examples 1, 3 and 5, the best detergency of example 3 is shown, and the best cleaning ability is shown when the auxiliary in example 3 is compounded in the above ratio, and the highest detergency is shown when the amount used is small, and the formula is as follows: 15 parts of anhydrous sodium metasilicate, 12 parts of tripolyphosphoric acid, 5 parts of light soda ash, 22.3 parts of heavy soda ash, 2 parts of sodium gluconate, 4.7 parts of anhydrous sodium sulphate, 1 part of dipropylene glycol methyl ether, 1 part of odorless kerosene, 28 parts of sodium hydroxide and 5 parts of sodium lignosulfonate.
As can be seen from example 3 and comparative examples 6 to 9, the detergency effect is poor when the single-component surfactant is used to prepare the steel degreasing powder, and the detergency is obviously improved when the three components are used for compounding, so that the synergistic effect generated by the simultaneous use of the three surfactants can be obviously seen;
using the hot degreased powder of steel prepared in example 3, the difference of the cleaning power at different temperatures was tested, and the test results are shown in Table 4.
Table 4: comparison of the cleaning power of the hot steel powders of example 3 at different treatment temperatures
| Temperature (. degree.C.) | 50 | 60 | 70 | 80 | 90 |
| Cleaning ratio (%) | 88.40％ | 94.12％ | 96.28％ | 97.53％ | 90.41％ |
As can be seen from Table 4, the most suitable treatment conditions for the hot steel degreasing powder are 60 ℃ to 80 ℃.
The steel hot degreasing powder prepared by the method has the following main technical indexes:
1. appearance: white or off-white solid
pH (5% aqueous g/L): 13.2-13.6
3. Free alkalinity (5% aqueous g/L): 55-70
4. Total alkalinity (5% aqueous g/L): 75-85
The steel hot degreasing powder prepared by the method has the following main construction parameters:
1. concentration of bath solution (g/L): 30-50
2. Treatment temperature (. degree. C.): 60-80
3. The cleaning mode is as follows: soaking, scrubbing and ultrasonic cleaning
4. Cleaning rate (2% aqueous solution g/L): not less than 94.12 percent
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. The hot degreasing powder for steel is characterized by being prepared from the following raw materials in parts by weight:
12-18 parts of anhydrous sodium metasilicate, 10-15 parts of tripolyphosphoric acid, 3.1-9 parts of light soda ash, 19-25 parts of heavy soda ash, 1.5-4 parts of sodium gluconate, 3.5-5.2 parts of anhydrous sodium sulphate, 2-4 parts of soap powder, 1.2 parts of peregal O-250.9, 0.7-1.1 parts of dipropylene glycol methyl ether, 0.4-1.2 parts of odorless kerosene, 15-36 parts of sodium hydroxide and 4.2-5.7 parts of sodium lignosulfonate.
2. The hot steel degreasing powder as claimed in claim 1, wherein the hot degreasing powder is prepared from the following raw materials in parts by weight:
15 parts of anhydrous sodium metasilicate, 12 parts of tripolyphosphoric acid, 5 parts of light soda ash, 22 parts of heavy soda ash, 2 parts of sodium gluconate, 4.7 parts of anhydrous sodium sulphate, 3 parts of soap powder, 251 parts of peregal O-251, 1 part of dipropylene glycol methyl ether, 1 part of odorless kerosene, 28 parts of sodium hydroxide and 4.2 parts of sodium lignosulfonate.
3. The method for preparing steel hot degreasing powder as claimed in claim 1, comprising the following steps:
a. weighing anhydrous sodium metasilicate, tripolyphosphoric acid, light soda ash, heavy soda ash, sodium gluconate, anhydrous sodium sulphate and soap powder according to the formula ratio, mixing and uniformly stirring to obtain a mixture A;
b. weighing dipropylene glycol methyl ether and odorless kerosene according to the formula ratio, uniformly mixing, adding into the mixture A, and uniformly stirring to obtain a mixture B;
c. weighing peregal O-25 in the formula ratio, heating to melt, adding into the powder B, and continuously stirring uniformly to obtain a mixture C;
d. and weighing sodium hydroxide and sodium lignosulphonate according to the formula ratio, respectively adding the sodium hydroxide and the sodium lignosulphonate into the mixture C, and uniformly stirring to obtain the steel thermal degreasing powder.
4. The method for preparing steel hot degreasing powder as claimed in claim 1, wherein the method comprises the following steps: the melting temperature in the step c is 50-65 ℃.
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Application publication date: 20200626 |