A stainless steel rolling liquid composition resistant to water mark defects

Abstract

The present invention relates to a stainless steel rolling fluid composition that is resistant to watermark defects. The present invention provides the use of azole derivatives as anti-watermark defect additives in stainless steel rolling fluid, wherein the azole derivatives include any one of benzotriazole, methylbenzotriazole or azole derivatives containing a fatty chain or a combination of at least two of them. The present invention utilizes azole derivatives as anti-watermark defect additives in stainless steel rolling fluid, which can effectively inhibit the generation of watermarks in nickel-saving stainless steel cold-rolled strips, and the effect is significant. Moreover, the stainless steel rolling fluid composition provided by the present invention has excellent anti-watermark performance, lubricity, cooling property, and cleanliness, does not contain irritating odor components, and is safe and environmentally friendly.

Description

Technical Field

[0001] The invention relates to the technical field of rolling fluid, in particular to a stainless steel rolling fluid composition which is resistant to water mark defects. Background Art

[0002] Nickel-saving stainless steel is a nitrogen-alloyed stainless steel formed by adding manganese, nitrogen and other elements to chromium-nickel stainless steel to partially or completely replace the precious metal nickel. The stability of nickel-saving austenite is lower than that of chromium-nickel austenite stainless steel, but nickel-saving stainless steel has excellent machinability, good comprehensive mechanical properties, corrosion resistance and decorative properties, as well as the characteristics of cost reduction and resource conservation. It is widely used in architectural decoration, tableware and kitchenware, sanitary equipment and utensils, transportation equipment and parts, etc.

[0003] However, nickel-saving cold-rolled stainless steel strip is very likely to form watermark defects if it is left for more than a week after annealing, which is similar to the mark left after water stains have dried up. Moreover, the watermark morphology becomes more obvious as the storage time increases, which will seriously affect the performance of stainless steel products.

[0004] Therefore, it is particularly important to provide a rolling fluid that can avoid water mark defects in nickel-saving stainless steel products. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a stainless steel rolling liquid composition that is resistant to watermark defects. The stainless steel rolling liquid composition provided by the present invention has excellent watermark resistance performance, and also has excellent lubricity, cooling, cleanliness, environmental protection and other characteristics.

[0006] In a first aspect, the present invention provides the use of azole derivatives as anti-watermark defect additives in stainless steel rolling fluid, wherein the azole derivatives include any one of benzotriazole, methylbenzotriazole or azole derivatives containing a fatty chain, or a combination of at least two thereof.

[0007] The inventors creatively discovered that the use of azole derivatives as anti-watermark defect additives in stainless steel rolling fluid can effectively inhibit the generation of watermarks in nickel-saving stainless steel products, with significant effects.

[0008] The azole derivative containing a fatty chain of the present invention is obtained by the amidation reaction of azoles and fatty acids, that is, the azole derivative containing a fatty chain is connected to the fatty chain via N in the azole.

[0009] The invention discloses an application of the azole derivatives as an anti-water mark defect additive in a stainless steel rolling liquid, wherein the stainless steel rolling liquid is a nickel-saving stainless steel rolling liquid.

[0010] As a preferred technical solution of the present invention, the azole derivative is selected from any one or a combination of at least two of the azole derivatives containing a fatty chain.

[0011] As a preferred technical solution of the present invention, the preparation method of the azole derivative containing a fatty chain comprises the following steps: benzotriazole and / or methylbenzotriazole reacts with fatty acid to obtain the azole derivative containing a fatty chain.

[0012] The reaction of benzotriazole and / or methylbenzotriazole with fatty acid in the present invention is an amidation reaction of benzotriazole and / or methylbenzotriazole with fatty acid.

[0013] As a preferred technical solution of the present invention, the preparation method of the azole derivative containing a fatty chain comprises the following steps: dissolving benzotriazole and / or methylbenzotriazole and fatty acid in N,N-dimethylformamide solvent, reacting at 160°C-180°C to obtain the azole derivative containing a fatty chain.

[0014] As a specific embodiment of the present invention, the preparation method of the azole derivative containing a fatty chain comprises the following steps: dissolving benzotriazole and / or methylbenzotriazole and fatty acid in N,N-dimethylformamide solvent, refluxing at 170°C for 6 hours, stopping the reaction, cooling to room temperature, and performing reduced pressure rotary evaporation to obtain the azole derivative containing a fatty chain.

[0015] As a preferred technical solution of the present invention, the fatty acid includes any one of oleic acid, coconut oil fatty acid or tall oil acid, or a combination of at least two of them.

[0016] In a second aspect, the present invention provides a stainless steel rolling liquid composition that is resistant to watermark defects. The raw materials of the stainless steel rolling liquid composition include, by weight:

[0017]

[0018]

[0019] The anti-watermark defect additive is the azole derivative described in the first aspect.

[0020] The sum of the weight parts of the various constituent raw materials is 100 weight parts. If the weight parts of the various components are not within this range, the same technical effect as the present invention cannot be obtained.

[0021] The vegetable oil can be 35 parts by weight, 40 parts by weight, 45 parts by weight, etc.

[0022] The synthetic ester may be 42 parts by weight, 44 parts by weight, 46 parts by weight, 48 parts by weight, etc.

[0023] The antioxidant can be 1 part by weight, 1.5 parts by weight, 2 parts by weight, etc.

[0024] The rust inhibitor can be 1 part by weight, 1.5 parts by weight, 2 parts by weight, 2.5 parts by weight, etc.

[0025] The extreme pressure lubricant can be 1.5 parts by weight, 2 parts by weight, 2.5 parts by weight, etc.

[0026] The anti-watermark defect additive can be 1 part by weight, 1.5 parts by weight, 2 parts by weight, 2.5 parts by weight, 3 parts by weight, 3.5 parts by weight, 4 parts by weight, 4.5 parts by weight, etc.

[0027] The emulsifier can be 2.5 parts by weight, 3 parts by weight, 3.5 parts by weight, etc.

[0028] The stainless steel rolling liquid composition provided by the invention has excellent anti-water mark performance, and also has excellent lubricity, cooling, cleanliness and rust resistance, does not contain irritating odor components, and is safe and environmentally friendly.

[0029] As a preferred technical solution of the present invention, the raw materials of the stainless steel rolling liquid composition include, by weight:

[0030]

[0031] As a preferred technical solution of the present invention, the extreme pressure lubricant is selected from phosphorus extreme pressure lubricants. Phosphorus extreme pressure lubricants can exert excellent lubricity at lower temperatures due to their special polar structure.

[0032] The stainless steel rolling liquid composition provided by the invention does not contain sulfur extreme pressure lubricants, thereby avoiding friction chemical reaction between the sulfur extreme pressure lubricants and stainless steel during the cold rolling process, thereby preventing the surface properties of the stainless steel from being affected.

[0033] As a preferred technical solution of the present invention, the phosphorus-based extreme pressure lubricant is selected from any one of phosphate ammonium salt extreme pressure lubricants and fatty alcohol polyoxyethylene ether phosphate extreme pressure lubricants, or a combination of at least two of them.

[0034] As a preferred technical solution of the present invention, the phosphate ammonium salt extreme pressure lubricant is XP349, and the fatty alcohol polyoxyethylene ether phosphate extreme pressure lubricant is O-5P.

[0035] As a preferred technical solution of the present invention, the rust inhibitor is selected from any one or a combination of at least two of C8-C20 long-chain fatty acids.

[0036] The C8-C20 long-chain fatty acid provided by the invention has an excellent anti-rust effect, can generate iron soap during the stainless steel rolling process, and has a good lubricating effect.

[0037] The C8-C20 long-chain fatty acid can be a long-chain fatty acid of C9, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, etc.

[0038] As a preferred technical solution of the present invention, the rust inhibitor is selected from any one of octanoic acid, dodecenylsuccinic acid, oleoylsarcosine or Guerbet acid, or a combination of at least two thereof.

[0039] As a preferred technical solution of the present invention, the vegetable oil is selected from any one of coconut oil, palm oil, rapeseed oil or castor oil, or a combination of at least two of them.

[0040] The vegetable oil provided by the invention is refined vegetable oil and has good lubricity and annealing cleanliness.

[0041] As a preferred technical solution of the present invention, the synthetic ester is selected from any one of trimellitic acid ester, trimethylol oleate or pentaerythritol oleate or a combination of at least two thereof. The application of the synthetic ester in the cold rolling liquid of stainless steel can significantly improve the anti-hydrolysis stability of the rolling liquid and increase the service life of the rolling liquid.

[0042] As a preferred technical solution of the present invention, the antioxidant is selected from any one of T501, C4703, BASF L57 or L135, or a combination of at least two thereof.

[0043] The antioxidant provided by the invention has good antioxidant effect, can effectively delay the oxidation and polymerization of stainless steel rolling liquid components, significantly reduce the generation of oil sludge, reduce oil consumption, and increase service life.

[0044] As a preferred technical solution of the present invention, the emulsifier is selected from cationic surfactants and / or nonionic surfactants.

[0045] As a preferred technical solution of the present invention, the cationic surfactant is selected from any one or a combination of at least two of the fatty amine polyoxyethylene ether cationic surfactants. The fatty amine polyoxyethylene ether cationic surfactants can significantly improve the dispersibility of iron powder and improve the cleanliness of cold-rolled strip steel and rolling mill arches.

[0046] As a preferred technical solution of the present invention, the cationic surfactant is selected from any one of T03, T05 or AC1205, or a combination of at least two of them.

[0047] As a preferred technical solution of the present invention, the nonionic surfactant is selected from any one of fatty alcohol polyoxyethylene ether nonionic surfactants or alkylphenol polyoxyethylene ether nonionic surfactants or a combination of at least two thereof. The nonionic surfactant can improve the cleaning property of the rolling fluid and maintain good cooling and cleaning effects.

[0048] As a preferred technical solution of the present invention, the fatty alcohol polyoxyethylene ether nonionic surfactant is selected from Emulsogen M and / or Genapol O020, and the alkylphenol polyoxyethylene ether nonionic surfactant is selected from OP-4 and / or OP-10.

[0049] The technical solution provided by the embodiment of the present invention has the following advantages compared with the prior art:

[0050] 1. The present invention uses azole derivatives as anti-watermark defect additives in stainless steel rolling fluid, which can effectively inhibit the generation of watermarks in nickel-saving stainless steel cold-rolled strips, and the effect is remarkable.

[0051] 2. The stainless steel rolling fluid composition provided by the present invention has excellent anti-water mark performance, and also has excellent lubricity, cooling and cleanliness, and does not contain irritating odor components, and is safe and environmentally friendly. DETAILED DESCRIPTION

[0052] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0053] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0054] The sources of the chemical reagents used in the present invention are as follows:

[0055] XP349: Xipeng Environmental Technology (Luoyang) Co., Ltd.

[0056] O-5P: Jiangsu Haian Petrochemical Plant

[0057] T03: Solvay (Zhenjiang) Chemicals Co., Ltd.

[0058] T05: Solvay (Zhenjiang) Chemicals Co., Ltd.

[0059] AC1205: Jiangsu Haian Petrochemical Plant

[0060] Emulsogen M: Shanghai Qicheng Lubricating Materials Co., Ltd.

[0061] Genapol O020: Shanghai Qicheng Lubricating Materials Co., Ltd.

[0062] RC 2540: Rhein Chemie

[0063] OP-4: Nanjing Kailian Chemical New Materials Co., Ltd.

[0064] OP-10: Nanjing Kailian Chemical New Materials Co., Ltd.

[0065] Preparation Example 1

[0066] This preparation example provides an azole derivative containing a fatty chain and a preparation method thereof, the preparation method comprising the following steps:

[0067] 0.2 mol of coconut oil fatty acid and 0.22 mol of benzotriazole were added to a reaction kettle, dissolved in 500 mL of N,N-dimethylformamide, refluxed at 170° C. for 6 h, then the reaction was stopped and cooled to room temperature, and the fatty chain-containing azole derivative was obtained by rotary evaporation under reduced pressure.

[0068] Preparation Example 2

[0069] This preparation example provides an azole derivative containing a fatty chain and a preparation method thereof, which is different from Preparation Example 1 in that coconut oil fatty acid is replaced by tall oil acid.

[0070] Preparation Example 3

[0071] This preparation example provides an azole derivative containing a fatty chain and a preparation method thereof, which is different from Preparation Example 1 in that benzotriazole is replaced by methylbenzotriazole.

[0072] Comparative Preparation Example 1

[0073] This comparative preparation example provides an azole derivative containing an aromatic hydrocarbon chain and a preparation method thereof, which is different from Preparation Example 1 in that coconut oil fatty acid is replaced by phenylacetic acid.

[0074] Example 1

[0075] This embodiment provides a stainless steel rolling liquid composition resistant to watermark defects and a preparation method thereof, wherein the weight parts of the constituent raw materials are:

[0076]

[0077] The vegetable oil is coconut oil, the synthetic ester is trimellitic acid, the antioxidant is T501 and L135 mixed in a ratio of 1:1, the rust inhibitor is octanoic acid, the extreme pressure lubricant is XP349, the anti-watermarking defect additive is an azole derivative containing a fatty chain prepared in Preparation Example 1, and the emulsifier is T03 and Emulsogen M mixed in a ratio of 1:3.

[0078] The preparation method comprises the following steps:

[0079] 1. Add vegetable oil, synthetic ester and antioxidant to a reactor equipped with a stirrer and a thermometer, stir and heat to 55°C, and continue stirring until they are completely dissolved;

[0080] 2. Add rust inhibitor, extreme pressure lubricant, anti-water mark defect additive, emulsifier, and continue stirring until uniform;

[0081] 3. Continue stirring until the system cools to room temperature to obtain the stainless steel rolling liquid composition resistant to watermark defects.

[0082] Example 2

[0083] This embodiment provides a stainless steel rolling liquid composition and a preparation method thereof, wherein the weight parts of the constituent raw materials are:

[0084]

[0085] The vegetable oil is palm oil, the synthetic ester is trimethylol oleate, the antioxidant is C4703, the rust inhibitor is dodecenylsuccinic acid, the extreme pressure lubricant is O-5P, the anti-water mark defect additive is an azole derivative containing a fatty chain prepared in Preparation Example 2, and the emulsifier is T03.

[0086] The preparation method is the same as that in Example 1.

[0087] Example 3

[0088] This embodiment provides a stainless steel rolling liquid composition and a preparation method thereof, wherein the weight parts of the constituent raw materials are:

[0089]

[0090] The vegetable oil is rapeseed oil, the synthetic ester is pentaerythritol oleate, the antioxidant is BASF L57, the rust inhibitor is Guerbet acid, the extreme pressure lubricant is O-5P, the anti-watermarking additive is the azole derivative containing a fatty chain prepared in Preparation Example 3, and the emulsifier is OP-4.

[0091] The preparation method is the same as that in Example 1.

[0092] Example 4

[0093] This embodiment provides a stainless steel rolling liquid composition and a preparation method thereof, which is different from Embodiment 1 in that the anti-watermarking defect additive is methylbenzotriazole;

[0094] The weight parts of the various constituent materials are:

[0095]

[0096] Example 5

[0097] This embodiment provides a stainless steel rolling liquid composition and a preparation method thereof, which is different from Embodiment 1 in that the anti-watermark defect additive is benzotriazole.

[0098] Comparative Example 1

[0099] This comparative example provides a stainless steel rolling liquid composition and a preparation method thereof. The difference from Example 1 is that this comparative example does not add an anti-water mark defect additive.

[0100] Comparative Example 2

[0101] This comparative example provides a stainless steel rolling liquid composition and a preparation method thereof. The difference from Example 1 is that the amount of vegetable oil and anti-water mark defect additive in this comparative example is

[0102] 37 parts of vegetable oil;

[0103] 8 parts of anti-watermark defect additive.

[0104] Comparative Example 3

[0105] This comparative example provides a stainless steel rolling fluid composition and a preparation method thereof. The difference from Example 1 is that the extreme pressure lubricant in this comparative example is RC 2540.

[0106] Comparative Example 4

[0107] This comparative example provides a stainless steel rolling fluid composition and a preparation method thereof. The difference from Example 1 is that the anti-watermark defect additive in this comparative example is an azole derivative containing an aromatic hydrocarbon chain obtained in Comparative Preparation Example 1.

[0108] Performance Test 1

[0109] The maximum no-seizure load P of the stainless steel rolling liquid compositions obtained in Examples 1-5 and Comparative Examples 1-4 was tested. B The test method was carried out in accordance with the national standard GB / T12583. The test results are shown in Table 1.

[0110] Performance Test 2

[0111] The lubrication performance of the stainless steel rolling liquid compositions obtained in Examples 1-5 and Comparative Examples 1-4 was tested. The lubrication performance of the rolling liquid was evaluated using a cyclic reciprocating tester with 201J2 grade nickel-saving stainless steel as the test piece. The test conditions were: temperature 180°C, frequency 0.5HZ, and rolling liquid injection volume 5μL. The test results are shown in Table 1.

[0112] Performance Test 3

[0113] The anti-watermark defect performance of the stainless steel rolling liquid composition obtained in Examples 1 to 5 and Comparative Examples 1 to 4 was investigated. The stainless steel rolling liquid composition was sprayed on site and stored for 30 days after annealing for observation. The results are shown in Table 1.

[0114] The maximum non-seizure load P of the stainless steel rolling liquid composition obtained in Examples 1-5 and Comparative Examples 1-4 B , lubrication performance, and anti-water mark defect performance results are shown in Table 1:

[0115] Table 1

[0116]

[0117] As can be seen from Table 1, the use of the azole derivatives containing a fatty chain of the present invention as anti-watermark defect additives can obtain a relatively excellent anti-watermark effect. In Examples 4-5, the use of conventional azole derivatives has a certain anti-watermark effect, but it is impossible to completely avoid the occurrence of watermark defects. In Comparative Example 1, in the absence of anti-watermark defect additives, the test showed that severe watermark defects were formed. In Comparative Example 2, when an excessive amount of anti-watermark defect additives were added, although no watermark defects were generated, the excessive addition of azole derivatives and lubricants would form competitive adsorption, affecting the lubricity of the lubricant. In Comparative Example 3, the RC2540 sulfur-containing lubricant was used as an extreme pressure lubricant, which not only failed to obtain a good lubricating effect but also had a certain negative impact on watermark defects. In Comparative Example 4, an azole derivative containing an aromatic hydrocarbon chain was used as an anti-watermark defect additive, which failed to exert the effect of anti-watermark defects.

[0118] It should be noted that, in this article, relational terms such as "first" and "second" 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. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0119] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments described herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The use of azole derivatives as anti-watermarking defect additives in stainless steel rolling fluids, characterized in that: The azole derivative is selected from any one or a combination of at least two of the azole derivatives containing a fatty chain; The method for preparing the azole derivative containing a fatty chain comprises the following steps: reacting benzotriazole with fatty acid to obtain the azole derivative containing a fatty chain; The fatty acid includes any one of oleic acid, coconut oil fatty acid or tall oil acid, or a combination of at least two thereof.

2. A stainless steel rolling liquid composition resistant to watermark defects, characterized in that: In parts by weight, the raw materials of the stainless steel rolling liquid composition are: 32.5-50 parts of vegetable oil; 40-50 parts of synthetic ester; 0.5-2.5 parts of antioxidant; Rust inhibitor 0.5-3 parts; 1-3 parts of extreme pressure lubricant; 0.5-5 parts of anti-watermarking additive; 2-4 parts of emulsifier; The anti-watermark defect additive is the azole derivative described in the application of claim 1; The extreme pressure lubricant is selected from phosphorus extreme pressure lubricants.

3. The stainless steel rolling liquid composition according to claim 2, characterized in that: In parts by weight, the raw materials of the stainless steel rolling liquid composition are: 35-50 parts of vegetable oil; 40-50 parts of synthetic ester; 0.5-2.5 parts of antioxidant; 1.5-3 parts of rust inhibitor; 1-3 parts of extreme pressure lubricant; 4-5 parts of anti-watermarking additive; Emulsifier 2-4 parts.

4. The stainless steel rolling liquid composition according to claim 2 or 3, characterized in that: The phosphorus-based extreme pressure lubricant is selected from any one of phosphate ammonium salt extreme pressure lubricants and fatty alcohol polyoxyethylene ether phosphate extreme pressure lubricants or a combination of at least two of them.

5. The stainless steel rolling liquid composition according to claim 2 or 3, characterized in that: The rust inhibitor is selected from any one or a combination of at least two of C8-C20 long-chain fatty acids.

6. The stainless steel rolling liquid composition according to claim 5, characterized in that: The rust inhibitor is selected from any one of octanoic acid, dodecenylsuccinic acid, oleoylsarcosine or Guerbet acid or a combination of at least two thereof.

7. The stainless steel rolling liquid composition according to claim 2 or 3, characterized in that: The vegetable oil is selected from any one of coconut oil, palm oil, rapeseed oil or castor oil, or a combination of at least two thereof; And / or, the synthetic ester is selected from any one or a combination of at least two of trimellitic acid ester, trimethylol oleate or pentaerythritol oleate; And / or, the antioxidant is selected from any one of T501, C4703, BASF L57 or L135, or a combination of at least two thereof.

8. The stainless steel rolling liquid composition according to claim 2 or 3, characterized in that: The emulsifier is selected from cationic surfactants and / or nonionic surfactants.

9. The stainless steel rolling liquid composition according to claim 8, characterized in that: The cationic surfactant is selected from any one or a combination of at least two of fatty amine polyoxyethylene ether cationic surfactants.

10. The stainless steel rolling liquid composition according to claim 8, characterized in that: The nonionic surfactant is selected from any one of fatty alcohol polyoxyethylene ether nonionic surfactants and alkylphenol polyoxyethylene ether nonionic surfactants or a combination of at least two thereof.

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