Galvanized steel sheet rolling oil and preparation method thereof

Abstract

The invention belongs to the technical field of rolling oil, and particularly discloses galvanized steel sheet rolling oil and a preparation method thereof.The galvanized steel sheet rolling oil is prepared from, by mass, 80%-90% of base oil, 1%-10% of penetrant, 1%-10% of extreme pressure lubricant, 0.1%-10% of fluorine-containing additive and 0.1%-1% of antioxidant; wherein the base oil is composed of 46 # white oil and 80 # white oil according to the mass ratio of (45-55): (35-45). All the raw materials adopted by the invention have no corrosion effect on the galvanized steel sheet, and the high-speed rolling oil for the galvanized steel sheet, which does not contain sulfur, phosphorus and chlorine, and is high in lubricating property, high in extreme pressure antiwear property, good in volatilization cooling property, less in residue and free of corrosion, is prepared by selecting specific components and a specific ratio.

Description

Technical Field

[0001] The present application belongs to the technical field of rolling oil, and specifically relates to a galvanized steel plate rolling oil and a preparation method thereof. Background Art

[0002] As an important metal composite material, galvanized steel sheet has played an irreplaceable role in many fields since its birth with its unique performance advantages. The base material of galvanized steel sheet is usually cold-rolled steel sheet or hot-rolled steel sheet. The galvanized layer is mostly closely combined with the steel sheet through hot-dip galvanizing or electro-galvanizing process to form a dense protective layer.

[0003] Rolling, as a core process of metal processing, involves the process of gradually thinning and changing the shape of metal sheets or other plastic materials using one or more pairs of rotating rollers.

[0004] There are few volatile high-speed rolling oils for galvanized steel plates introduced in public information, and most of them use stamping oil as a substitute. However, it has the following problems, which makes it difficult to use it in the actual high-speed rolling processing of galvanized steel plates: 1. Insufficient extreme pressure and wear resistance: High-speed rolling requires fast processing speed and deformation. Insufficient extreme pressure and wear resistance can easily lead to defects on the surface of galvanized steel plates, damage to the coating, distortion of the shape of processed parts and other problems; 2. Insufficient cooling: The accumulation of friction heat caused by high-speed processing may cause hardening of the workpiece surface and affect the material properties; 3. Extreme pressure, lubricity, cooling, corrosion resistance and other properties cannot be taken into account at the same time: The processing fluids introduced in public information cannot guarantee extreme pressure, lubricity, cooling, corrosion resistance and other properties at the same time. Commonly used strong extreme pressure lubricants containing sulfur, phosphorus, chlorine, etc. have good lubrication effect, but the working temperature is high, the volatility is small and the residue is large, and there is corrosion to the coating or paint surface. During the processing, it will cause wear and corrosion to the processing materials and molds. They cannot be used for a long time in actual processing and cannot effectively guarantee a high yield rate.

[0005] Therefore, it is necessary to comprehensively consider the characteristics of the galvanized steel sheet and the characteristics of the processing process for development, and provide a galvanized steel sheet rolling oil according to the specific situation.

[0006] Application Contents

[0007] The purpose of this application is to solve the deficiencies of the prior art and provide a galvanized steel plate rolling oil and a preparation method thereof, which specifically adopts the following technical solutions:

[0008] On the one hand, the present application provides a galvanized steel plate rolling oil, which includes, by mass percentage: 80%-90% base oil, 1%-10% penetrant, 1%-10% extreme pressure lubricant, 0.1%-10% fluorine-containing additive, and 0.1%-1% antioxidant; wherein the base oil is composed of No. 46 white oil and No. 80 white oil in a mass ratio of (45-55): (35-45).

[0009] In this application, the base oil, as the basic component of the galvanized steel sheet rolling oil, is not only a carrier of other components, but also has multiple functions such as cooling, lubrication and sealing; in general, one or more of normal alkanes and isoalkanes are required to be combined. Since this application needs to meet the needs of a specific rolling process, a specific No. 46 white oil and No. 80 white oil are used in combination to ensure stable performance.

[0010] In the present application, the penetrant enables the galvanized steel plate rolling oil to fully penetrate into the tiny gaps of the metal while fully cleaning the oil stains and impurities on the metal surface, thereby improving the lubricating effect of the galvanized steel plate rolling oil and reducing friction and wear; at the same time, it effectively removes metal chips and other non-metallic pollutants generated during the processing process, further improving the cleanliness of the processing area, thereby extending the service life of the mold and equipment.

[0011] To this end, in order to improve the specific performance requirements of the galvanized steel plate rolling oil provided in this application, it is necessary to use a specific content of a specific penetrant. The penetrant selected in this application includes at least one of isomeric alcohols, fatty alcohol polyoxyethylene ethers, alkylphenol polyoxyethylene ethers and sodium alkyl sulfonates; in some specific preferred embodiments, the penetrant selected in this application is at least one of isomeric tridecyl alcohol, decyl tetradecyl alcohol and isomeric hexadecanol.

[0012] In the present application, the galvanized steel plate rolling oil often needs to face a high downward force during the processing, and at this time, its heavy load resistance performance needs to be appropriately improved. The extreme pressure lubricant can form an extreme pressure lubricating film on the surface of the friction pair under the boundary lubrication conditions of high temperature and high pressure, thereby improving the heavy load resistance performance required by the galvanized steel plate rolling oil; for this reason, the galvanized steel plate rolling oil provided in the present application uses an extreme pressure lubricant that can react chemically with active elements on the metal surface to generate metal soap compounds for addition. These specific metal soap compounds have low shear strength and excellent wear resistance, which can meet the performance requirements of the galvanized steel plate rolling oil provided in the present application for reducing the friction coefficient and the wear rate.

[0013] To this end, the extreme pressure lubricant added to the galvanized steel sheet rolling oil provided in the present application includes at least one of polymethacrylate, synthetic grease and triester of phthalate. In some preferred embodiments, the extreme pressure lubricant is at least one of Priolube 1963 and triester of phthalate.

[0014] In the present application, in order to avoid the problem of oxidation of galvanized steel plate rolling oil during actual use, to avoid corrosion and oxidation of the metal surface, and to prevent the failure of anti-friction additives that are not corrosion-resistant during processing, therefore, in order to resist the erosion of corrosive substances and protect the metal surface from corrosion and oxidation, the present application adopts the addition of a specific fluorine-containing additive at a specific content to form an unconnected molecular arrangement structure on the metal surface, thereby resisting the erosion of various corrosive substances while also providing excellent lubrication properties, which can significantly reduce the friction coefficient.

[0015] To this end, the fluorine-containing additive added to the galvanized steel sheet rolling oil provided in the present application includes at least one of a fluorine-containing non-ionic polymer, a fluorine-containing anionic polymer and a perfluoropolyether. In some preferred embodiments, the fluorine-containing additive is polyhexafluoropropylene oxide.

[0016] In this application, in order to further inhibit the oxidation and degradation of galvanized steel sheet rolling oil, maintain the stability of the oil, prevent the performance of the galvanized steel sheet rolling oil from deteriorating due to oxidation, and extend the life of the oil, it is necessary to appropriately add some antioxidants to achieve the above effects. Grease auto-oxidation generally includes three stages: chain initiation, chain elongation, and chain termination. Antioxidants achieve the effect of inhibiting grease oxidation by blocking or inhibiting a certain stage in the grease oxidation process.

[0017] To this end, the antioxidant added to the galvanized steel sheet rolling oil provided in the present application is at least one of a phenolic antioxidant and a chelated metal ion antioxidant. In some preferred embodiments, the antioxidant is 2,6-di-tert-butyl-p-cresol. 2,6-di-tert-butyl-p-cresol can be used as a hydrogen donor to provide hydrogen atoms to lipid free radicals, so that the free radicals are converted into inactive or inert free radicals, thereby delaying or interfering with the chain growth stage in the free radical chain reaction and blocking the oxidation reaction. The preferred antioxidant can meet the above-mentioned oxidant requirements.

[0018] The present application also provides a specific preferred scheme for the above-mentioned galvanized steel plate rolling oil, and the specific composition, calculated by mass percentage, includes: 50% No. 46 white oil, 40% No. 80 white oil, 5% decyltetradecyl alcohol or 5% isohexadecanol, 4% triester phthalate, 0.5% polyhexafluoropropylene oxide, and 0.5% 2,6-di-tert-butylparacresol.

[0019] On the other hand, the present application also provides a method for preparing the above-mentioned galvanized steel sheet rolling oil, comprising the following steps:

[0020] Maintaining the temperature at 55°C-60°C, mix the base oil, penetrant and extreme pressure lubricant, then add the fluorine-containing additive, mix well and cool to room temperature, add the antioxidant, mix well and obtain the galvanized steel plate rolling oil.

[0021] The beneficial effects of this application are:

[0022] The galvanized steel plate rolling oil provided in the present application uses specific ingredients and a specific ratio. It has no corrosive effect on the galvanized steel plate and has a continuous homogeneous high-performance fluorine-containing lubricating film, which ensures excellent lubrication performance. At the same time, the base oil with specific ingredients and specific ratio selected has good volatility, thereby reducing residue while ensuring good volatile cooling properties, solving the problem of excessive heat accumulation during the high-speed rolling of galvanized steel plates, and providing a galvanized steel plate high-speed rolling oil that is free of sulfur, phosphorus and chlorine, has high lubricity, high extreme pressure and wear resistance, good volatile cooling, less residue and is corrosion-free. DETAILED DESCRIPTION

[0023] The following will be combined with the embodiments to clearly and completely describe the concept and technical effects of this application, so as to fully understand the purpose, scheme and effect of this application. It should be noted that the embodiments and features in the embodiments of this application can be combined with each other without conflict.

[0024] Before describing the specific embodiments of the galvanized steel plate rolling oil provided in the present application, the sources of some raw materials used in the embodiments of the present application are first described:

[0025] No. 46 white oil: Zhonghai Nanlian No. 80 industrial grade white oil;

[0026] No. 80 white oil: No. 46 industrial grade white oil of China Southern Airlines;

[0027] Isotridecyl alcohol: Guangzhou Youyu New Materials Co., Ltd.;

[0028] Decyltetradecanol: Guangzhou Jinshengji Chemical Co., Ltd.;

[0029] Isohexadecanol: Guangzhou Jinbaolai Biotechnology Co., Ltd.;

[0030] Synthetic grease Priolube 1963: Dongguan Hongli Chemical Technology Co., Ltd.;

[0031] Triphenylene glycol: Guangzhou Meishi Chemical Co., Ltd.

[0032] Polyhexafluoropropylene oxide: Shanghai Huafutai Chemical Co., Ltd.;

[0033] 2,6-Di-tert-butyl-p-cresol: Zhengzhou Kangyuan Chemical Products Co., Ltd.

[0034] Example 1

[0035] First, this embodiment provides a galvanized steel plate rolling oil, which includes, by mass percentage: 90% base oil, 5% penetrant, 4% extreme pressure lubricant, 0.5% fluorine-containing additive, and 0.5% antioxidant; wherein the base oil is composed of No. 46 white oil and No. 80 white oil in a mass ratio of 50:40, the penetrant is decyltetradecyl alcohol, the extreme pressure lubricant is triester phthalate, the fluorine-containing additive is polyhexafluoropropylene oxide, and the antioxidant is 2,6-di-tert-butylparacresol.

[0036] Secondly, the specific preparation method of the galvanized steel sheet rolling oil provided in this embodiment is:

[0037] In terms of mass percentage, 50% of No. 46 white oil and 40% of No. 80 white oil were mixed as base oil, followed by 5% of decyl tetradecanol as a penetrant and 4% of triester phthalate as an extreme pressure lubricant. The three were mixed and stirred at 60°C until the solution was clear and transparent.

[0038] Then, 0.5% polyhexafluoropropylene oxide was added as a fluorine-containing additive, and the mixture was stirred at 60° C. for 20 minutes, and then ultrasonically mixed for 20 minutes;

[0039] The mixed solution after ultrasonic mixing was cooled to room temperature, 0.5% 2,6-di-tert-butyl-p-cresol was added as an antioxidant, and stirred for 20 minutes.

[0040] Example 2

[0041] First, this embodiment provides a galvanized steel plate rolling oil, which includes, by mass percentage: 90% base oil, 5% penetrant, 4% extreme pressure lubricant, 0.5% fluorine-containing additive, and 0.5% antioxidant; wherein the base oil is composed of No. 46 white oil and No. 80 white oil in a mass ratio of 50:40, the penetrant is isomeric hexadecyl alcohol, the extreme pressure lubricant is triester phthalate, the fluorine-containing additive is polyhexafluoropropylene oxide, and the antioxidant is 2,6-di-tert-butylparacresol.

[0042] Secondly, the specific preparation method of the galvanized steel sheet rolling oil provided in this embodiment is:

[0043] In terms of mass percentage, 50% of No. 46 white oil and 40% of No. 80 white oil were mixed as base oil, followed by 5% of isomeric hexadecanol as a penetrant and 4% of triester phthalate as an extreme pressure lubricant. The three were mixed and stirred at 60°C until the solution was clear and transparent.

[0044] Then, 0.5% polyhexafluoropropylene oxide was added as a fluorine-containing additive, and the mixture was stirred at 60° C. for 20 minutes, and then ultrasonically mixed for 20 minutes;

[0045] The mixed solution after ultrasonic mixing was cooled to room temperature, 0.5% 2,6-di-tert-butyl-p-cresol was added as an antioxidant, and stirred for 20 minutes.

[0046] Example 3

[0047] First, this embodiment provides a galvanized steel plate rolling oil, which includes, by mass percentage: 90% base oil, 5% penetrant, 4% extreme pressure lubricant, 0.5% fluorine-containing additive, and 0.5% antioxidant; wherein the base oil is composed of No. 46 white oil and No. 80 white oil in a mass ratio of 50:40, the penetrant is isomeric hexadecyl alcohol, the extreme pressure lubricant is 2% Priolube 1963 and 2% triester phthalate, the fluorine-containing additive is polyhexafluoropropylene oxide, and the antioxidant is 2,6-di-tert-butylparacresol.

[0048] Secondly, the specific preparation method of the galvanized steel sheet rolling oil provided in this embodiment is:

[0049] In terms of mass percentage, 50% of No. 46 white oil and 40% of No. 80 white oil were mixed as base oil, followed by 5% of isomeric hexadecanol as penetrant, 2% of Priolube 1963 and 2% of triester of phthalate as extreme pressure lubricants, the three were mixed and stirred at 60°C until the solution was clear and transparent;

[0050] Then, 0.5% polyhexafluoropropylene oxide was added as a fluorine-containing additive, and the mixture was stirred at 60° C. for 20 minutes, and then ultrasonically mixed for 20 minutes;

[0051] The mixed solution after ultrasonic mixing was cooled to room temperature, 0.5% 2,6-di-tert-butyl-p-cresol was added as an antioxidant, and stirred for 20 minutes.

[0052] Example 4

[0053] First, this embodiment provides a galvanized steel plate rolling oil, which includes, by mass percentage: 90% base oil, 5% penetrant, 4% extreme pressure lubricant, 0.5% fluorine-containing additive, and 0.5% antioxidant; wherein the base oil is composed of No. 46 white oil and No. 80 white oil in a mass ratio of 50:40, the penetrant is isomeric hexadecyl alcohol, the extreme pressure lubricant is Priolube 1963, the fluorine-containing additive is polyhexafluoropropylene oxide, and the antioxidant is 2,6-di-tert-butylparacresol.

[0054] Secondly, the specific preparation method of the galvanized steel sheet rolling oil provided in this embodiment is:

[0055] In terms of mass percentage, 50% of No. 46 white oil and 40% of No. 80 white oil were mixed as base oil, followed by 5% of isomeric hexadecanol as penetrant and 4% of Priolube 1963 as extreme pressure lubricant. The three were mixed and stirred at 60°C until the solution was clear and transparent.

[0056] Then, 0.5% polyhexafluoropropylene oxide was added as a fluorine-containing additive, and the mixture was stirred at 60° C. for 20 minutes, and then ultrasonically mixed for 20 minutes;

[0057] The mixed solution after ultrasonic mixing was cooled to room temperature, 0.5% 2,6-di-tert-butyl-p-cresol was added as an antioxidant, and stirred for 20 minutes.

[0058] Performance Testing

[0059] The galvanized steel sheet rolling oils of the above embodiments were taken as test samples, and the following performance tests were performed on the test samples:

[0060] (1) Referring to the relevant test methods in GB / T 6144-2010 Synthetic Cutting Fluid, the appearance test was carried out on each test sample. The results are shown in Table 1.

[0061] Table 1

[0062] sample Example 1 Example 2 Example 3 Example 4 Solution state Clarity and transparency Clarity and transparency Clarity and transparency Clarity and transparency

[0063] The liquids in Examples 1-4 are mixed evenly and are clear and transparent, meeting the corresponding requirements.

[0064] (2) According to the relevant test methods in GB / T 30515-2014 Transparent and opaque liquid petroleum products - Determination of kinematic viscosity and calculation of dynamic viscosity, the viscosity of each test sample was tested. The results are shown in Table 2.

[0065] Table 2

[0066] sample Example 1 Example 5 Example 3 Example 4 <![CDATA[Viscosity at 40°C (mm 2 / S)]]> 1.35 1.39 1.42 1.45

[0067] (3) According to the relevant test methods in GB / T 6144-2010 Synthetic Cutting Fluid, galvanized steel plates were used to conduct corrosion tests on each test sample. The results are shown in Table 3.

[0068] Table 3

[0069] sample Example 1 Example 2 Example 3 Example 4 Corrosion level qualified qualified qualified qualified

[0070] (4) Referring to GB / T 3142-2019 Determination of load-bearing capacity of lubricants - Four-ball method, the extreme pressure performance of each test sample was tested using the four-ball friction tester MS-10A produced by Xiamen Tianji Automation Co., Ltd. The results are shown in Table 4.

[0071] Table 4

[0072] sample Example 1 Example 2 Example 3 Example 4 PB(kg) 38 42 46 50

[0073] (5) The tapping torque test was performed on each test sample using TAP TTTSystem-G8. The specific test conditions were: extrusion speed 1500 r / min, depth 20 mm, maximum torque 400 Ncm, tool: TTT T-M4F-TINT 3.642 mm; 7075 aluminum: TTT-System 3.4365-M4F / 3.7 20 mm. The results are shown in Table 5.

[0074] Table 5

[0075] sample Example 1 Example 2 Example 3 Example 4 Average torque (N cm) 196.53 192.17 189.86 184.22

[0076] (6) Volatility test: The specific method is as follows: on a glass dish with a diameter of 90 mm, press 100 g / dm 2 Add the standard dropwise and record the weight of the stock solution 1, and record the weight of the remaining stock solution after drying at 90℃ for 4 minutes 2.

[0077]

[0078] The volatility was calculated and the surface state of the glass dish after the volatility test was recorded. The specific results are shown in Table 6.

[0079] Table 6

[0080]

[0081]

[0082] It can be seen from performance test 6 that the volatilization rates of Examples 1-4 are all over 95%, among which Example 1 has the best performance, with a volatilization rate of 99%; Examples 1 and 2 have only slight liquid marks after volatilization, while Examples 3 and 4 have obvious liquid marks after volatilization, indicating that the galvanized steel plate rolling oil residues of Examples 1 and 2 are low and the performance is excellent.

[0083] It can be seen from performance tests 1-6 that the temperature rise of tapping torque increases with the increase of viscosity, indicating that the oil needs to control viscosity to ensure good cooling during processing; the two lubrication data of tapping torque average torque and PB show that hexadecanol and Priolu be 1963 have better lubrication, but because the better lubrication corresponds to a thicker lubricating film thickness, its volatility decreases accordingly. There is no corrosion phenomenon on galvanized steel sheets by each raw material.

[0084] Although the description of the present application has been quite detailed and specifically describes several described embodiments, it is not intended to be limited to any of these details or embodiments or any particular embodiment, but should be regarded as providing a broad possible interpretation of these claims by reference to the attached claims in view of the prior art, thereby effectively covering the intended scope of the present application. In addition, the above description of the present application is based on the foreseeable embodiments of the applicant, the purpose of which is to provide a useful description, and those non-substantial changes to the present application that have not yet been foreseen may still represent equivalent changes to the present application.

Claims

1. A galvanized steel sheet rolling oil, characterized in that: Calculated by mass percentage, it includes: 80%-90% base oil, 1%-10% penetrant, 1%-10% extreme pressure lubricant, 0.1%-10% fluorine-containing additive, and 0.1%-1% antioxidant; wherein the base oil is composed of No. 46 white oil and No. 80 white oil in a mass ratio of (45-55):(35-45).

2. The galvanized steel sheet rolling oil according to claim 1, characterized in that: The penetrant includes at least one of isomeric alcohols, fatty alcohol polyoxyethylene ethers, alkylphenol polyoxyethylene ethers and sodium alkyl sulfonates.

3. The galvanized steel sheet rolling oil according to claim 2, characterized in that: The penetrant is at least one of isomeric tridecanol, decyltetradecanol and isomeric hexadecanol.

4. The galvanized steel sheet rolling oil according to claim 1, characterized in that: The extreme pressure lubricant includes at least one of polymethacrylate, synthetic fat and triester of metaphthalate.

5. The galvanized steel sheet rolling oil according to claim 4, characterized in that: The extreme pressure lubricant is at least one of Priolube 1963 and triester of metaphthalate.

6. The galvanized steel sheet rolling oil according to claim 1, characterized in that: The fluorine-containing additive includes at least one of a fluorine-containing nonionic polymer, a fluorine-containing anionic polymer and a perfluoropolyether.

7. The galvanized steel sheet rolling oil according to claim 6, characterized in that: The fluorine-containing additive is polyhexafluoropropylene oxide.

8. The galvanized steel sheet rolling oil according to claim 1, characterized in that: The antioxidant comprises at least one of a phenolic antioxidant and a chelated metal ion antioxidant.

9. The galvanized steel sheet rolling oil according to any one of claims 1 to 8, characterized in that: Calculated by mass percentage, it includes: 50% of No. 46 white oil, 40% of No. 80 white oil, 5% of decyltetradecyl alcohol or 5% of isomeric hexadecanol, 4% of triester phthalate, 0.5% of polyhexafluoropropylene oxide, and 0.5% of 2,6-di-tert-butyl-p-cresol.

10. A method for preparing galvanized steel sheet rolling oil according to any one of claims 1 to 7, characterized in that: The following steps are involved: The temperature is maintained at 55° C.-60° C., the base oil, the penetrant and the extreme pressure lubricant are mixed, then the fluorine-containing additive is added, the temperature is cooled to room temperature after mixing evenly, the antioxidant is added, and the galvanized steel plate rolling oil is obtained after mixing evenly.

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