Sulfur, phosphorus and chlorine-free cold rolling oil and preparation method thereof

Abstract

The invention relates to the technical field of cold rolling oil preparation, and discloses a sulfur-phosphorus-chlorine-free cold rolling oil, which comprises the following components by mass percentage: 5-6% of extreme pressure lubricant, 83-88% of base oil, 1-2% of antioxidant, 3-4% of oiliness agent, 1-2% of corrosion inhibitor, and 2-3% of emulsifier; the extreme pressure lubricant is organic molybdenum nitride or sulfur-phosphorus-free lubricating additive, and the sulfur-phosphorus-free lubricating additive is a reaction product of benzotriazole fatty amine, oily potassium borate, organic tungsten compound and triethanolamine at 70°C-180°C, mixed reaction for 1.0h-5.0h. The invention can reduce the impact on the environment by replacing the phosphorus-containing extreme pressure anti-wear agent with a phosphorus-free extreme pressure lubricant composed of benzotriazole fatty amine, oily potassium borate, organic tungsten compound and triethanolamine, and truly achieve environmental friendliness.

Description

Technical Field

[0001] The invention relates to the technical field of cold rolling oil preparation, and more specifically to sulfur-, phosphorus- and chlorine-free cold rolling oil and a preparation method thereof. Background Art

[0002] Cold rolling is a metal forming method that mainly changes the shape and size of metal materials through cold working. It is generally used to improve the performance and dimensional accuracy of metal materials and is widely used in stainless steel. During the cold rolling process, stainless steel is usually fed into the cold rolling mill in the form of coils or flat plates. The cold rolling mill flattens the material and changes its shape through continuous pressing and stretching of a series of roller groups. After a series of deformation processes, cold rolling oil needs to be added to ensure lubrication and cooling to avoid damage. As a qualified stainless steel cold rolling oil, it needs to meet the following performance requirements:

[0003] 1. It has good extreme pressure and anti-wear properties, ensuring the smoothness and cleanliness of the rolled plate shape and the surface of the rolled plate;

[0004] 2. It has good anti-corrosion and anti-rust properties, ensuring that the rolling mill equipment and strip storage are not corroded;

[0005] 3. It has good annealing cleaning performance, ensuring that the plate surface is bright after annealing, and is compatible with hydraulic oil and gear oil. It will not cause performance changes or dirty prints due to a small amount of leakage of miscellaneous oil;

[0006] 4. It has good foam suppression performance, prevents splashing or overflowing, and ensures cooling performance.

[0007] If the lubricating performance of the rolling oil is insufficient, that is, the strength of the formed oil film is not enough, the oil film will break under a large rolling force, and the working roll may directly contact the plate surface, increasing friction and generating more heat. If the rolling oil cannot play an immediate cooling role, the heat cannot be taken away in time, the temperature of the working roll will rise and deform, which will lead to poor plate shape and rough surface of the rolled plate and strip, and the working roll itself will produce thermal fatigue and increased wear, which will greatly increase the processing cost. Therefore, stainless steel rolling also requires rolling oil to have good lubricity and cooling properties.

[0008] In the actual rolling process using traditional rolling oil, a large amount of iron powder and oil sludge will be generated. The oil sludge generated is actually formed by the large amount of iron soaps gathered. Iron soaps are very easy to stick to the frame and the roll gap, making the rolling site easy to get dirty and causing pollution. At the same time, the presence of oil sludge in the rolling process can easily cause surface defects on the steel plate after rolling, such as roller marks, different plate surfaces, unstable rolling force, and rolling oil spots. Moreover, a large amount of oil sludge will increase the fuel consumption of traditional rolling oil, which is relatively high. To address this problem, steel mills currently use regular cleaning of the rolling mill to alleviate mill pollution, but a large amount of wastewater will be generated during the cleaning process and is difficult to handle. This not only puts forward requirements for the cleanliness of the rolling mill, but also makes it urgent to develop rolling oil with higher cleaning performance.

[0009] As my country's industrial strength increases, the demand for stainless steel products in the market increases, and the demand for stainless steel cold rolling oil also increases. However, compared with existing imported similar products, the quality of domestic rolling oil still has a certain gap, such as insufficient plate surface finish, poor annealing cleanliness, short service life, and large amount of oil smoke generated during the cold rolling process. With the increasing environmental protection requirements in my country, in the foreseeable future, the market demand for new environmentally friendly stainless steel cold rolling oil will be greater, so the research and development of high-performance cold rolling lubricants has important research significance and application prospects.

[0010] The extreme pressure anti-wear agent in the non-sulfur-chlorine system stainless steel cold rolling oil provided in the existing Chinese invention patent CN202311806047.2 is a combination of oleyl alcohol phosphate, alkyl phosphate amine salt and Solvay RHODAFACRE-710. The phosphorus contained therein will have an impact on the environment. Based on this, the present invention designs a sulfur-phosphorus-chlorine-free cold rolling oil and a preparation method thereof to solve the above problems. Summary of the invention

[0011] In order to overcome the deficiencies of the prior art, the present invention provides a sulfur-phosphorus-chlorine-free cold rolling oil and a preparation method thereof, which has the advantage of being phosphorus-free.

[0012] To achieve the above object, the present invention provides the following technical solution: a sulfur, phosphorus and chlorine-free cold rolling oil, calculated by mass percentage, comprising the following components:

[0013] Extreme pressure lubricant 5-6%, base oil 83-88%, antioxidant 1-2%, oiliness agent 3-4%, corrosion inhibitor 1-2%, emulsifier 2-3%;

[0014] The extreme pressure lubricant is organic molybdenum nitride or a sulfur-free and phosphorus-free lubricating additive.

[0015] As a preferred technical solution of the present invention, the organic molybdenum nitride is specifically XP2011 sulfur- and phosphorus-free organic molybdenum nitride.

[0016] As a preferred technical solution of the present invention, the sulfur-free and phosphorus-free lubricating additive is a reaction product of benzotriazole fatty amine, oily potassium borate, organic tungsten compound and triethanolamine at 70° C.-180° C., mixed for 1.0 h-5.0 h.

[0017] As a preferred technical solution of the present invention, the base oil is a combination of 24° palm oil, a class of mineral oil 150SN and coconut oil, and the mass ratio of the 24° palm oil, a class of mineral oil 150SN and coconut oil is 52-57:17:14.

[0018] As a preferred technical solution of the present invention, the antioxidant is one or more of an aromatic amine antioxidant and a hindered phenol antioxidant; the hindered phenol antioxidant is an alkyl biscyclohexyl cresol, and the aromatic amine antioxidant is styryl diphenylamine; the antioxidant is a combination of the alkyl biscyclohexyl cresol and the styryl diphenylamine, and the mass ratio of the alkyl biscyclohexyl cresol to the styryl diphenylamine is 0.2:1.5.

[0019] As a preferred technical solution of the present invention, the oiliness agent is a combination of polyester KLH4500, decylphenyl α-naphthylamine and trimethylolpropane oleate, and the mass ratio of the polyester KLH4500, decylphenyl α-naphthylamine and trimethylolpropane oleate is 2.5:0.4:1.

[0020] As a preferred technical solution of the present invention, the corrosion inhibitor is one or more of a phosphonate corrosion inhibitor, phosphinocarboxylic acid, hydroxyethyl oleoyl imidazoline, mercaptobenzothiazole, benzotriazole and sulfonated lignin; the corrosion inhibitor is a combination of hydroxyethyl oleoyl imidazoline and benzotriazole, and the mass ratio of hydroxyethyl oleoyl imidazoline and benzotriazole is 0.6:0.5.

[0021] As a preferred technical solution of the present invention, the emulsifier is a combination of tallow amine, octadecylamine polyoxyethylene ether and polyethylene glycol 600 monooleic acid, and the mass ratio of the tallow amine, octadecylamine polyoxyethylene ether and polyethylene glycol 600 monooleic acid is 1.2:1.6:0.2.

[0022] A method for preparing sulfur, phosphorus and chlorine-free cold rolling oil comprises the following steps:

[0023] Step 1: Slowly add the base oil into the container and mix, stirring at 55-60°C until the solution is clear and transparent to obtain a mixed solution;

[0024] Step 2: slowly add the oiliness agent into the container, and stir evenly at 55-60° C. until the mixed solution becomes clear and transparent;

[0025] Step 3: Slowly add the antioxidant into the container and stir evenly at 55-60° C. until the mixed solution becomes clear and transparent;

[0026] Step 4: Slowly add extreme pressure lubricant into the container, and stir evenly at 55-60° C. until the mixed solution becomes clear and transparent;

[0027] Step 5: slowly add the emulsifier into the container, and stir evenly at 55-60° C. until the mixed solution becomes clear and transparent;

[0028] Step 6: slowly add the corrosion inhibitor into the container, and stir evenly at 55-60° C. until the mixed solution is clear and transparent, to obtain the sulfur, phosphorus and chlorine-free cold rolling oil.

[0029] A testing method for sulfur-free, phosphorus-free and chlorine-free cold rolling oil comprises the following steps:

[0030] Step 1: Turn on the industrial hot water circulation pump, adjust the agitator speed to 100r / min, and the temperature to 60℃;

[0031] Step 2: Add deionized water and sulfur-free, phosphorus-free, and chlorine-free cold rolling oil to the industrial hot water circulation pump in a mass ratio of 100:1.5-4;

[0032] Step 3: circulate for 2 hours to fully emulsify and obtain the pump circulation emulsion of the sulfur, phosphorus and chlorine-free cold rolling oil;

[0033] Step 4: Take a Q-panel steel plate, the area of ​​which is denoted as S, fix the Q-panel steel plate in front of the spray gun, adjust the spray pressure to 2.5-3.0 bar, spray the pump circulating emulsion to the Q-panel steel plate at high pressure for 30 seconds, hang it in a drying oven at 90°C for 10 minutes, take it down and cool it, then weigh it, which is denoted as W1;

[0034] Step 5: Clean the Q-panel steel plate with ethanol, blow dry the plate surface, and weigh the initial weight of the Q-panel steel plate again, recorded as W0;

[0035] Step 6: Calculate the mass of oil film attached to the steel plate per square meter: PO = (W1-W0) × 1000 / S, unit: mg / m2.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] The present invention can reduce the impact on the environment and truly achieve environmental friendliness by replacing the phosphorus-containing extreme pressure anti-wear agent with a phosphorus-free extreme pressure lubricant composed of benzotriazole fatty amine, oily potassium borate, organic tungsten compound and triethanolamine. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Embodiment 1

[0040] The present invention provides a sulfur, phosphorus and chlorine-free cold rolling oil, which comprises the following components calculated by mass percentage:

[0041] Extreme pressure lubricant 5-6%, base oil 83-88%, antioxidant 1-2%, oiliness agent 3-4%, corrosion inhibitor 1-2%, emulsifier 2-3%;

[0042] The extreme pressure lubricant is organic molybdenum nitride.

[0043] The organic molybdenum nitride is specifically XP2011 sulfur-free and phosphorus-free organic molybdenum nitride.

[0044] The base oil is a combination of 24° palm oil, a type of mineral oil 150SN and coconut oil, and the mass ratio of the 24° palm oil, a type of mineral oil 150SN and coconut oil is 52-57:17:14.

[0045] The antioxidant is one or more of an aromatic amine antioxidant and a hindered phenol antioxidant; the hindered phenol antioxidant is an alkyl biscyclohexyl cresol, and the aromatic amine antioxidant is styryl diphenylamine; the antioxidant is a combination of the alkyl biscyclohexyl cresol and the styryl diphenylamine, and the mass ratio of the alkyl biscyclohexyl cresol to the styryl diphenylamine is 0.2:1.5.

[0046] The oiliness agent is a combination of polyester KLH4500, decylphenyl α-naphthylamine and trimethylolpropane oleate, and the mass ratio of the polyester KLH4500, decylphenyl α-naphthylamine and trimethylolpropane oleate is 2.5:0.4:1.

[0047] The corrosion inhibitor is one or more of phosphonate corrosion inhibitor, phosphine carboxylic acid, hydroxyethyl oleoyl imidazoline, mercaptobenzothiazole, benzotriazole and sulfonated lignin; the corrosion inhibitor is a combination of hydroxyethyl oleoyl imidazoline and benzotriazole, and the mass ratio of hydroxyethyl oleoyl imidazoline and benzotriazole is 0.6:0.5.

[0048] The emulsifier is a combination of tallow amine, octadecylamine polyoxyethylene ether and polyethylene glycol 600 monooleic acid, and the mass ratio of the tallow amine, octadecylamine polyoxyethylene ether and polyethylene glycol 600 monooleic acid is 1.2:1.6:0.2.

[0049] A method for preparing sulfur, phosphorus and chlorine-free cold rolling oil comprises the following steps:

[0050] Step 1: Slowly add the base oil into the container and mix, stirring at 55-60°C until the solution is clear and transparent to obtain a mixed solution;

[0051] Step 2: slowly add the oiliness agent into the container, and stir evenly at 55-60° C. until the mixed solution becomes clear and transparent;

[0052] Step 3: Slowly add the antioxidant into the container and stir evenly at 55-60° C. until the mixed solution becomes clear and transparent;

[0053] Step 4: Slowly add extreme pressure lubricant into the container, and stir evenly at 55-60° C. until the mixed solution becomes clear and transparent;

[0054] Step 5: slowly add the emulsifier into the container, and stir evenly at 55-60° C. until the mixed solution becomes clear and transparent;

[0055] Step 6: slowly add the corrosion inhibitor into the container, and stir evenly at 55-60° C. until the mixed solution is clear and transparent, to obtain the sulfur, phosphorus and chlorine-free cold rolling oil.

[0056] A testing method for sulfur-free, phosphorus-free and chlorine-free cold rolling oil comprises the following steps:

[0057] Step 1: Turn on the industrial hot water circulation pump, adjust the agitator speed to 100r / min, and the temperature to 60℃;

[0058] Step 2: Add deionized water and sulfur-free, phosphorus-free, and chlorine-free cold rolling oil to the industrial hot water circulation pump in a mass ratio of 100:1.5-4;

[0059] Step 3: circulate for 2 hours to fully emulsify and obtain the pump circulation emulsion of the sulfur, phosphorus and chlorine-free cold rolling oil;

[0060] Step 4: Take a Q-panel steel plate, the area of ​​which is denoted as S, fix the Q-panel steel plate in front of the spray gun, adjust the spray pressure to 2.5-3.0 bar, spray the pump circulating emulsion to the Q-panel steel plate at high pressure for 30 seconds, hang it in a drying oven at 90°C for 10 minutes, take it down and cool it, then weigh it, which is denoted as W1;

[0061] Step 5: Clean the Q-panel steel plate with ethanol, blow dry the plate surface, and weigh the initial weight of the Q-panel steel plate again, recorded as W0;

[0062] Step 6: Calculate the mass of oil film attached to the steel plate per square meter: PO = (W1-W0) × 1000 / S, unit: mg / m2.

[0063] Embodiment 2

[0064] The present invention provides a sulfur, phosphorus and chlorine-free cold rolling oil, which comprises the following components calculated by mass percentage:

[0065] Extreme pressure lubricant 5-6%, base oil 83-88%, antioxidant 1-2%, oiliness agent 3-4%, corrosion inhibitor 1-2%, emulsifier 2-3%;

[0066] The extreme pressure lubricant is a sulfur-free and phosphorus-free lubricating additive.

[0067] The sulfur-free and phosphorus-free lubricating additive is a reaction product of benzotriazole fatty amine, oily potassium borate, organic tungsten compound and triethanolamine, which are mixed and reacted at 70° C. to 180° C. for 1.0 h to 5.0 h.

[0068] The base oil is a combination of 24° palm oil, a type of mineral oil 150SN and coconut oil, and the mass ratio of the 24° palm oil, a type of mineral oil 150SN and coconut oil is 52-57:17:14.

[0069] The antioxidant is one or more of an aromatic amine antioxidant and a hindered phenol antioxidant; the hindered phenol antioxidant is an alkyl biscyclohexyl cresol, and the aromatic amine antioxidant is styryl diphenylamine; the antioxidant is a combination of the alkyl biscyclohexyl cresol and the styryl diphenylamine, and the mass ratio of the alkyl biscyclohexyl cresol to the styryl diphenylamine is 0.2:1.5.

[0070] The oiliness agent is a combination of polyester KLH4500, decylphenyl α-naphthylamine and trimethylolpropane oleate, and the mass ratio of the polyester KLH4500, decylphenyl α-naphthylamine and trimethylolpropane oleate is 2.5:0.4:1.

[0071] The corrosion inhibitor is one or more of phosphonate corrosion inhibitor, phosphine carboxylic acid, hydroxyethyl oleoyl imidazoline, mercaptobenzothiazole, benzotriazole and sulfonated lignin; the corrosion inhibitor is a combination of hydroxyethyl oleoyl imidazoline and benzotriazole, and the mass ratio of hydroxyethyl oleoyl imidazoline and benzotriazole is 0.6:0.5.

[0072] The emulsifier is a combination of tallow amine, octadecylamine polyoxyethylene ether and polyethylene glycol 600 monooleic acid, and the mass ratio of the tallow amine, octadecylamine polyoxyethylene ether and polyethylene glycol 600 monooleic acid is 1.2:1.6:0.2.

[0073] A method for preparing sulfur, phosphorus and chlorine-free cold rolling oil comprises the following steps:

[0074] Step 1: Slowly add the base oil into the container and mix, stirring at 55-60°C until the solution is clear and transparent to obtain a mixed solution;

[0075] Step 2: slowly add the oiliness agent into the container, and stir evenly at 55-60° C. until the mixed solution becomes clear and transparent;

[0076] Step 3: Slowly add the antioxidant into the container and stir evenly at 55-60° C. until the mixed solution becomes clear and transparent;

[0077] Step 4: Slowly add extreme pressure lubricant into the container, and stir evenly at 55-60° C. until the mixed solution becomes clear and transparent;

[0078] Step 5: slowly add the emulsifier into the container, and stir evenly at 55-60° C. until the mixed solution becomes clear and transparent;

[0079] Step 6: slowly add the corrosion inhibitor into the container, and stir evenly at 55-60° C. until the mixed solution is clear and transparent, to obtain the sulfur, phosphorus and chlorine-free cold rolling oil.

[0080] A testing method for sulfur-free, phosphorus-free and chlorine-free cold rolling oil comprises the following steps:

[0081] Step 1: Turn on the industrial hot water circulation pump, adjust the agitator speed to 100r / min, and the temperature to 60℃;

[0082] Step 2: Add deionized water and sulfur-free, phosphorus-free, and chlorine-free cold rolling oil to the industrial hot water circulation pump in a mass ratio of 100:1.5-4;

[0083] Step 3: circulate for 2 hours to fully emulsify and obtain the pump circulation emulsion of the sulfur, phosphorus and chlorine-free cold rolling oil;

[0084] Step 4: Take a Q-panel steel plate, the area of ​​which is denoted as S, fix the Q-panel steel plate in front of the spray gun, adjust the spray pressure to 2.5-3.0 bar, spray the pump circulating emulsion to the Q-panel steel plate at high pressure for 30 seconds, hang it in a drying oven at 90°C for 10 minutes, take it down and cool it, then weigh it, which is denoted as W1;

[0085] Step 5: Clean the Q-panel steel plate with ethanol, blow dry the plate surface, and weigh the initial weight of the Q-panel steel plate again, recorded as W0;

[0086] Step 6: Calculate the mass of oil film attached to the steel plate per square meter: PO = (W1-W0) × 1000 / S, unit: mg / m2.

[0087] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0088] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sulfur, phosphorus and chlorine-free cold rolling oil, characterized in that: Calculated by mass percentage, it includes the following components: Extreme pressure lubricant 5-6%, base oil 83-88%, antioxidant 1-2%, oiliness agent 3-4%, corrosion inhibitor 1-2%, emulsifier 2-3%; The extreme pressure lubricant is an organic molybdenum nitride or a sulfur-free and phosphorus-free lubricating additive.

2. The sulfur-phosphorus-chlorine-free cold rolling oil according to claim 1, characterized in that: The organic molybdenum nitride is specifically XP2011 sulfur-free and phosphorus-free organic molybdenum nitride.

3. The sulfur-phosphorus-chlorine-free cold rolling oil according to claim 1, characterized in that: The sulfur-free and phosphorus-free lubricating additive is a reaction product of benzotriazole fatty amine, oily potassium borate, organic tungsten compound and triethanolamine, which are mixed and reacted at 70° C. to 180° C. for 1.0 h to 5.0 h.

4. The sulfur, phosphorus and chlorine-free cold rolling oil according to claim 1, characterized in that: The base oil is a combination of 24° palm oil, a type of mineral oil 150SN and coconut oil, and the mass ratio of the 24° palm oil, a type of mineral oil 150SN and coconut oil is 52-57:17:

14.

5. The sulfur, phosphorus and chlorine-free cold rolling oil according to claim 4, characterized in that: The antioxidant is one or more of an aromatic amine antioxidant and a hindered phenol antioxidant; the hindered phenol antioxidant is an alkyl biscyclohexyl cresol, and the aromatic amine antioxidant is styryl diphenylamine; the antioxidant is a combination of the alkyl biscyclohexyl cresol and the styryl diphenylamine, and the mass ratio of the alkyl biscyclohexyl cresol to the styryl diphenylamine is 0.2:1.

5.

6. The sulfur, phosphorus and chlorine-free cold rolling oil according to claim 5, characterized in that: The oiliness agent is a combination of polyester KLH4500, decylphenyl α-naphthylamine and trimethylolpropane oleate, and the mass ratio of the polyester KLH4500, decylphenyl α-naphthylamine and trimethylolpropane oleate is 2.5:0.4:

1.

7. The sulfur, phosphorus and chlorine-free cold rolling oil according to claim 6, characterized in that: The corrosion inhibitor is one or more of phosphonate corrosion inhibitor, phosphine carboxylic acid, hydroxyethyl oleoyl imidazoline, mercaptobenzothiazole, benzotriazole and sulfonated lignin; the corrosion inhibitor is a combination of hydroxyethyl oleoyl imidazoline and benzotriazole, and the mass ratio of hydroxyethyl oleoyl imidazoline and benzotriazole is 0.6:0.

5.

8. The sulfur, phosphorus and chlorine-free cold rolling oil according to claim 7, characterized in that: The emulsifier is a combination of tallow amine, octadecylamine polyoxyethylene ether and polyethylene glycol 600 monooleic acid, and the mass ratio of the tallow amine, octadecylamine polyoxyethylene ether and polyethylene glycol 600 monooleic acid is 1.2:1.6:0.

2.

9. A method for preparing sulfur-, phosphorus- and chlorine-free cold rolling oil according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: slowly add the base oil into the container and mix, stirring at 55-60°C until the solution is clear and transparent to obtain a mixed solution; Step 2: slowly add the oiliness agent into the container, and stir evenly at 55-60°C until the mixed solution becomes clear and transparent; Step 3: Slowly add the antioxidant into the container, and stir evenly at 55-60° C. until the mixed solution becomes clear and transparent; Step 4: Slowly add the extreme pressure lubricant into the container, and stir evenly at 55-60° C. until the mixed solution becomes clear and transparent; Step 5: slowly add the emulsifier into the container, and stir evenly at 55-60° C. until the mixed solution becomes clear and transparent; Step 6: slowly add the corrosion inhibitor into the container, stir evenly at 55-60° C. until the mixed solution is clear and transparent, to obtain the sulfur, phosphorus and chlorine-free cold rolling oil.