Stainless steel cold rolling liquid composition, method for preparing the same, and use thereof

Abstract

This invention discloses a stainless steel cold rolling fluid composition, its preparation method, and its application. By weight, the composition comprises: 3-10 parts of extreme pressure anti-wear agent; 1-5 parts of emulsifier; 0.5-8 parts of corrosion inhibitor; 0.5-3 parts of antioxidant; 0-0.5 parts of defoamer; 0.1-1 parts of bactericide; and 73-94.5 parts of oiliness agent. The bactericide is selected from iodocarbamates and triazine bactericides. The composition of this invention has advantages such as low odor, adjustable lubricity, good cooling performance, and moderate emulsion stability.

Description

Technical Field

[0001] This invention belongs to the field of lubrication technology for stainless steel cold rolling processes, specifically relating to stainless steel rolling fluid compositions, their preparation methods, and applications. Background Technology

[0002] Lubricants for stainless steel cold rolling processes are generally classified into pure oil-based stainless steel cold rolling oils and water-emulsified stainless steel cold rolling fluids. Among these, water-emulsified stainless steel cold rolling fluids are widely used in continuous cold rolling processes due to their adjustable lubricity, good cooling performance, moderate emulsification stability, and the absence of oil mist during operation. To ensure the effectiveness of the cold rolling fluid, additives such as oiliness agents, extreme pressure anti-wear agents, and emulsifiers are usually added to the formulation. These additives have varying degrees of characteristic chemical odors, and the cold rolling fluids formulated with these additives also carry a slight to strong characteristic odor of the rolling fluid. In recent years, as enterprises have increasingly emphasized environmental and health considerations, steel mills have raised their requirements for the on-site working environment for the health of their employees, and the odor at the rolling site has become a growing concern. Therefore, there is a need for a low-odor cold rolling fluid.

[0003] For example, Chinese patent application CN201910005275.7 discloses a water-soluble stainless steel seamless pipe cold rolling fluid and its preparation method, and Chinese patent application CN202110700797.6 discloses a clean fully synthetic stainless steel cold rolling fluid composition and its use; however, none of the solutions disclosed in these patent applications have solved the problem of odor generated by the composition.

[0004] Therefore, there is a need for a stainless steel cold rolling fluid product that has low odor and meets performance requirements such as adjustable lubricity, good cooling performance, and moderate emulsion stability. Summary of the Invention

[0005] In view of this, in order to solve the above-mentioned problems in the prior art, the present invention proposes a stainless steel cold rolling fluid composition, its preparation method and application, which has the advantages of low odor, adjustable lubricity, good cooling performance and moderate emulsion stability.

[0006] The technical problem of the present invention is solved by the following technical solution.

[0007] In a first aspect, the present invention provides a stainless steel cold rolling fluid composition, wherein, by weight, the stainless steel cold rolling fluid composition comprises:

[0008]

[0009] The bactericide is selected from iodocarbamates and triazine bactericides.

[0010] In a specific embodiment of the present invention, the extreme pressure anti-wear agent is selected from acidic phosphate esters, phosphites, self-emulsifying phosphate esters, alkyl phosphonates, phosphate ester amine salts, thiophosphate ester amine salts, sulfurized olefins, sulfurized fatty acid esters, sulfurized fatty oils, and borate esters. Preferably, the extreme pressure anti-wear agent is selected from acidic phosphate esters, sulfurized olefins, borate esters, and sulfurized fatty acid esters. For example, the extreme pressure anti-wear agent comprises or is composed of acidic phosphate esters, sulfurized olefins, borate esters, and sulfurized fatty acid esters, wherein the mass ratio of acidic phosphate esters, sulfurized olefins, borate esters, and sulfurized fatty acid esters is 1:(1-2):(1-2):(1-2).

[0011] As a specific embodiment of the present invention, the emulsifier is selected from octylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether carboxylic acid, and tallow amine polyoxyethylene ether.

[0012] As a specific embodiment of the present invention, the corrosion inhibitor is selected from naphthenates, sodium petroleum sulfonate, barium petroleum sulfonate, benzotriazole, methylbenztriazole derivatives, thiadiazole derivatives, synthetic barium sulfonate, organic amines, long-chain dicarboxylic acids and dialkyl dithiophosphates.

[0013] Preferably, the corrosion inhibitor is selected from sodium petroleum sulfonate, methyltriazole derivatives, synthetic barium sulfonate, dialkyl dithiophosphate, and organic amines.

[0014] As a specific embodiment of the present invention, the antioxidant is selected from shielded phenolic antioxidants or amine antioxidants. Examples of shielded phenolic antioxidants suitable for use in the present invention include, but are not limited to, BHT (tert-butylhydroxybenzoate). Examples of amine antioxidants suitable for use in the present invention include, but are not limited to, L67.

[0015] As a specific embodiment of the present invention, the defoamer is selected from at least one of organosiloxane copolymers and amino silicone oils.

[0016] As a specific embodiment of the present invention, the oiliness agent is selected from animal oils, vegetable oils, synthetic esters, tallow, oleic acid and fatty acid esters.

[0017] Preferably, the vegetable oil is selected from palm oil, rapeseed oil, soybean oil, and coconut oil.

[0018] Preferably, the synthetic ester is selected from trioleic glyceride, trimethylolpropane oleate, trimethylolpropane cocoate, pentaerythritol decanate, and pentaerythritol tetraoleate.

[0019] In some specific embodiments, the oiling agent is selected from one or more of rapeseed oil, oleic acid, trioleic acid ester, soybean oil, trimethylolpropane oleate, palm oil, pentaerythritol tetraoleate, trimethylolpropane tricocate, and pentaerythritol decanate. For example, by weight, the oiling agent comprises 0.5-4 parts, preferably 2-4 parts, of trioleic acid ester; 40-50 parts of rapeseed oil; and 20-30 parts of trimethylolpropane tricocate.

[0020] In a second aspect, the present invention provides a method for preparing a stainless steel cold rolling fluid composition, characterized in that the method comprises the following steps:

[0021] S1: Mix the extreme pressure anti-wear agent and the oiliness agent, heat and stir to obtain a mixture;

[0022] S2: Add emulsifier, corrosion inhibitor, antioxidant, defoamer and bactericide to the mixture obtained in step S1 in sequence, heat and stir, cool to obtain stainless steel cold rolling liquid composition.

[0023] As a specific embodiment of the present invention, the heating and stirring conditions in steps S1 and S2 each independently include: a temperature of 45-55°C; a stirring rate of 300-500 rpm; and a stirring time of 0.5-2 h.

[0024] Thirdly, the present invention provides the application of the stainless steel cold rolling fluid composition of the first aspect or the stainless steel cold rolling fluid composition prepared by the preparation method of the second aspect in the field of lubrication of stainless steel cold rolling process.

[0025] As a specific embodiment of the present invention, the stainless steel cold rolling fluid composition is diluted with demineralized water to a milky white emulsion with a weight percentage concentration of 3-8%, which is used for lubrication in the stainless steel cold rolling process.

[0026] All of the above-mentioned raw materials used in this invention can be prepared in-house or purchased commercially; this invention does not impose any particular limitations on them.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] The stainless steel cold rolling fluid composition provided by this invention involves the selective compounding and synergistic combination of extreme pressure anti-wear agents, emulsifiers, corrosion inhibitors, antioxidants, defoamers, bactericides, and oiliness agents. In particular, the stainless steel cold rolling fluid composition of this invention uses low-odor additives and integrates bactericides into the main formulation. This reduces the characteristic chemical odor of the additives and decreases the possibility of bacterial growth causing the emulsion to deteriorate and produce off-odors. Therefore, the obtained stainless steel cold rolling fluid composition has the advantages of low odor, adjustable lubricity, good cooling performance, and moderate emulsion stability. Detailed Implementation

[0029] The present invention will be further described below with reference to specific embodiments, but this does not constitute any limitation on the present invention.

[0030] Example 1

[0031] This embodiment illustrates a low-odor stainless steel cold rolling melt composition and its preparation method. Raw materials are prepared according to the formulation in Table 1, specifically:

[0032] S1: Add the extreme pressure anti-wear agent and oiliness agent to a reaction vessel equipped with a stirrer, heat and stir at 50±5℃ to obtain a mixture;

[0033] S2: Add emulsifier, corrosion inhibitor, antioxidant, defoamer and bactericide to the mixture obtained in step S1 in sequence, stir at 50±5℃ until completely dissolved, cool to room temperature to obtain stainless steel cold rolling liquid composition.

[0034] Examples 2-5

[0035] The stainless steel cold rolling fluid composition was prepared according to the formulation in Table 1 and the method in Example 1.

[0036] Table 1. Formulations (parts by weight) of stainless steel cold rolling melt compositions in Examples 1-5

[0037]

[0038]

[0039] Comparative Example 1

[0040] The composition was prepared according to the contents disclosed in Example 1 of patent application CN201910005275.7. The specific components of the formula are as follows: first, 60% of diethylene glycol is heated to about 40-50°C, and then 10% of high molecular weight polyphosphate ester, 20% of borate ester, 5% of polyethylene glycol oleate, 3% of diethylene glycol monobutyl ether, and 2% of triethanolamine are added and stirred evenly. The odor evaluation results of the composition are shown in Table 2. The composition was emulsified with water and circulated in a simulated field for 14 days. The odor evaluation results before circulation are shown in Table 3, and the odor evaluation results after circulation are shown in Table 4.

[0041] Comparative Example 2

[0042] The composition was prepared according to the content disclosed in Example 2 of patent application CN202110700797.6. The specific components of the formula are: 5 parts of sulfurized olefin E35, 2 parts of self-emulsifying phosphate ester 410P, 2 parts of octylphenol polyoxyethylene ether OP, 0.5 parts of polymeric surfactant ZL21, 2 parts of sodium petroleum sulfonate, 2 parts of shielding phenolic antioxidant T501, 0.05 parts of three-dimensional siloxane MS575, 50 parts of rapeseed oil, 1.95 parts of oleic acid, and 35 parts of soybean oil. The composition was mixed and stirred at 45°C. The odor evaluation results are shown in Table 2. The composition was emulsified with water and circulated in a simulated field for 14 days. The odor evaluation results before the cycle are shown in Table 3, and the odor evaluation results after the cycle are shown in Table 4.

[0043] Comparative Example 3

[0044] The composition was prepared according to Example 1 of this patent, except that no bactericide was added in Comparative Example 3, the amount of trioleic acid glyceride added was 4 parts, and the amount of other additives added was the same. The odor evaluation results are shown in Table 2. The composition was emulsified with water and circulated in a simulated field for 14 days. The odor evaluation results before circulation are shown in Table 3, and the odor evaluation results after circulation are shown in Table 4.

[0045] Performance testing

[0046] 1. Odor blind sample evaluation method

[0047] (1) The samples were labeled in the form of blind samples, and 10 people engaged in stainless steel cold rolling process operation were invited to conduct evaluation.

[0048] (2) Odor evaluation method: nasal smelling. Open the bottle containing the sample and place it about 50cm in front of and below your nose. Gently fan the bottle opening with your hand to allow a very small amount of gas to enter your nostrils for smelling.

[0049] (3) Odor rating: Irritating odor - Odor present - Low odor - Nearly odorless.

[0050] (4) Results statistics: The number of voters for each odor level of the stainless steel cold rolling liquid composition was calculated, and the odor evaluation results are shown in Table 2.

[0051] Table 2. Odor blind sample evaluation of the stainless steel cold rolling melt compositions of Examples 1-5 and Comparative Examples 1-2

[0052] Odor rating pungent odor It has an odor Low odor Nearly tasteless Example 1 0 0 5 5 Example 2 0 0 4 6 Example 3 0 0 4 6 Example 4 0 0 8 2 Example 5 0 0 5 5 Comparative Example 1 4 5 1 0 Comparative Example 2 3 7 0 0 Comparative Example 3 0 0 5 5

[0053] 2. Blind sample evaluation of the odor after emulsification with water of the composition.

[0054] To simulate actual working conditions, the compositions in the above embodiments and comparative examples were emulsified with water to prepare a 3% concentration emulsion. This emulsion was then circulated and stirred for 14 days to simulate actual use. The following instruments were used: a JZ-II Sifang brand homogenizer, its own homogenizing cup, and a CH1006 super thermostatic bath; the experimental methods are as follows:

[0055] (1) Add 9 g of the composition and 291 g of deionized water to a homogenizing cup, place it in a homogenizer, and homogenize at 1000 r / min for 1 minute. Repeat this step to prepare a total of 3000 g of emulsion.

[0056] (2) The odor blind sample evaluation of the emulsion of the composition diluted with water was carried out according to the odor blind sample evaluation method. The odor evaluation results are shown in Table 3.

[0057] (3) Place the emulsion into a CH1006 super thermostatic bath, control the temperature at 55℃, and circulate and stir for 14 days.

[0058] (4) The composition emulsion that has been circulated for 14 days was evaluated by odor blind sample according to the odor blind sample evaluation method. The odor evaluation results are shown in Table 4.

[0059] Table 3. Odor blind sample evaluation of stainless steel cold rolling flux composition emulsions from Examples 1-5 and Comparative Examples 1-2.

[0060] Odor rating pungent odor It has an odor Low odor Nearly tasteless Example 1 0 0 3 7 Example 2 0 0 4 6 Example 3 0 0 4 6 Example 4 0 0 7 3 Example 5 0 0 5 5 Comparative Example 1 3 6 1 0 Comparative Example 2 3 7 0 0 Comparative Example 3 0 0 4 6

[0061] Table 4 Odor blind sample evaluation of stainless steel cold rolling flux composition emulsion after 14 days of circulation.

[0062] Odor rating pungent odor It has an odor Low odor Nearly tasteless Example 1 0 0 6 4 Example 2 0 0 7 3 Example 3 0 0 8 2 Example 4 0 0 7 3 Example 5 0 0 6 4 Comparative Example 1 8 2 0 0 Comparative Example 2 6 4 0 0 Comparative Example 3 1 2 6 1

[0063] As shown in Tables 2 and 3, the odor perceptibility of the stainless steel cold rolling fluid compositions and their water-emulsified emulsions in Examples 1-5 is significantly better than that of the comparative examples. As shown in Table 4, the odor perceptibility of the water-emulsified emulsions of the stainless steel cold rolling fluids in Examples 1-5 after 14 days of circulation is significantly better than that of the comparative examples. Comparing Example 1 and Comparative Example 3, the odor perceptibility of the water-emulsified emulsion of Example 1 after 14 days of circulation is significantly better than that of Comparative Example 3. Not wanting to be limited by theory, it is believed that the addition of low-odor additives and bactericides in this invention reduces the characteristic chemical odor of the additives themselves, while also reducing the possibility of bacterial growth causing the emulsion to deteriorate and produce off-odors.

[0064] 3. Lubricity, cooling properties, and emulsification stability

[0065] Lubricity evaluation method: The maximum non-seize load P of the described examples and comparative examples was evaluated using a four-ball extreme pressure testing machine (MRS-10) according to GB / T 3142. B The results are shown in Table 5.

[0066] The embodiments and comparative examples described in this invention have better cooling properties than oil-based products because they need to be diluted with water during use.

[0067] Evaluation method for emulsification stability: The emulsification stability of the compositions of the embodiments and comparative examples described in this invention after being emulsified with water and left for 24 hours was tested according to SH / T 0579. The results are shown in Table 5.

[0068] Table 5. Lubricity of stainless steel cold rolling fluid compositions and emulsion stability of their emulsions

[0069]

[0070] As shown in Table 5, the stainless steel cold rolling fluid composition of the present invention has adjustable lubricity, good cooling performance, and moderate emulsification stability.

[0071] In summary, the combination and synergistic effect of extreme pressure anti-wear agent, emulsifier, corrosion inhibitor, antioxidant, defoamer and oiliness agent in the stainless steel cold rolling fluid composition of the present invention makes the prepared cold rolling fluid composition have adjustable lubricity, good cooling performance and moderate emulsion stability, which meets the requirements of on-site cold rolling process lubrication and can be used in industrial applications of stainless steel cold rolling process lubrication.

[0072] Any numerical value mentioned in this invention, if there is only a two-unit interval between any minimum and any maximum value, includes all values ​​that increase by one unit each time from the minimum to the maximum value. For example, if the amount of a component, or the value of a process variable such as temperature, pressure, or time, is stated as 50-90, in this specification it means specifically listing values ​​such as 51-89, 52-88… and 69-71 and 70-71, etc. For non-integer values, it may be appropriately considered that a unit is 0.1, 0.01, 0.001, or 0.0001. These are merely some specifically specified examples. In this application, in a similar manner, all possible combinations of numerical values ​​between the listed minimum and maximum values ​​are considered to have been disclosed.

[0073] It should be noted that the embodiments described above are only for explaining the present invention and do not constitute any limitation on the present invention. The present invention has been described with reference to typical embodiments, but it should be understood that the words used therein are descriptive and explanatory terms, not limiting terms. Modifications can be made to the present invention within the scope of the claims, and revisions can be made to the present invention without departing from the scope and spirit of the present invention. Although the present invention described herein relates to specific methods, materials, and embodiments, it does not mean that the present invention is limited to the specific examples disclosed herein; on the contrary, the present invention can be extended to all other methods and applications with the same function.

Claims

1. A stainless steel cold rolling melt composition, wherein, The stainless steel cold rolling fluid composition comprises the following components in parts by weight: 3-10 parts of extreme pressure anti-wear agent; 1-5 parts emulsifier; Corrosion inhibitor 0.5-8 parts; Antioxidant 0.5-3 parts; 0-0.5 parts of defoamer; 0.1 to 1 part of bactericide; and Oily agent 73-94.5 parts; The bactericide is composed of iodocarbamate and triazine bactericide; the extreme pressure anti-wear agent is composed of acidic phosphate ester, sulfurized olefin and borate ester; the oiliness agent is composed of 0.5-4 parts trioleic acid glyceride, 40-50 parts rapeseed oil and 20-30 parts trimethylolpropane tricocate.

2. The stainless steel cold rolling fluid composition according to claim 1, characterized in that, The oiliness agent is composed of 2-4 parts trioleic acid glyceride, 40-50 parts rapeseed oil and 20-30 parts trimethylolpropane cocoate.

3. The stainless steel cold rolling fluid composition according to claim 1 or 2, characterized in that, The emulsifier is selected from octylphenol polyoxyethylene ether, fatty alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether carboxylic acid, and tallow amine polyoxyethylene ether.

4. The stainless steel cold rolling fluid composition according to claim 1 or 2, characterized in that, The corrosion inhibitor is selected from naphthenates, sodium petroleum sulfonate, barium petroleum sulfonate, benzotriazole, methylbenztriazole derivatives, thiadiazole derivatives, organic amines, long-chain dicarboxylic acids, and dialkyl dithiophosphates.

5. The stainless steel cold rolling fluid composition according to claim 1 or 2, characterized in that, The corrosion inhibitor is synthetic barium sulfonate.

6. The stainless steel cold rolling fluid composition according to claim 1 or 2, characterized in that, The corrosion inhibitor is selected from sodium petroleum sulfonate, methylbenztriazole derivatives, synthetic barium sulfonate, dialkyl dithiophosphate, and organic amines.

7. The stainless steel cold rolling fluid composition according to claim 1 or 2, characterized in that, The antioxidant is a shielded phenolic antioxidant or an amine antioxidant; And / or, the defoamer is selected from organosiloxane copolymers and amino silicone oils.

8. A method for preparing the stainless steel cold rolling fluid composition according to any one of claims 1-7, characterized in that, The method includes the following steps: S1: Mix the extreme pressure anti-wear agent and the oiliness agent, heat and stir to obtain a mixture; S2: Add emulsifier, corrosion inhibitor, antioxidant, defoamer and bactericide to the mixture obtained in step S1 in sequence, heat and stir, cool to obtain stainless steel cold rolling liquid composition.

9. The preparation method according to claim 8, characterized in that, The heating and stirring conditions in steps S1 and S2 each independently include: The temperature is 45~55℃; the stirring speed is 300-500 rpm; and the stirring time is 0.5-2h.

10. The application of the stainless steel cold rolling fluid composition according to any one of claims 1-7 or the stainless steel cold rolling fluid composition prepared by the preparation method according to claim 8 or 9 in the field of lubrication of stainless steel cold rolling process.

Images