Silicon steel anti-rust oil and preparation method thereof

Abstract

The invention belongs to the technical field of anti-rust oil, and discloses silicon steel anti-rust oil and a preparation method thereof. The silicon steel anti-rust oil comprises the following raw materials in parts by weight: 72-80 parts of base oil, 15-25 parts of an anti-rust agent, 0.5-2 parts of a surfactant and 0.1-1 part of an antioxidant, the antirust agent comprises petroleum calcium sulfonate and petroleum sodium sulfonate, and the weight ratio of the petroleum calcium sulfonate to the petroleum sodium sulfonate is (1-2): 1. Specific anti-rust agent composition is provided in an anti-rust oil system, so that a relatively strong physical adsorption effect is formed on the surface of silicon steel, the anti-rust performance on the silicon steel is well ensured, and meanwhile, the anti-rust oil has the characteristics of low odor, environmental protection and the like, and can be industrially popularized and applied in the field of silicon steel rust prevention.

Description

Technical Field

[0001] The invention belongs to the technical field of anti-rust oil, and particularly relates to silicon steel anti-rust oil and a preparation method thereof. Background Art

[0002] Silicon steel is widely used in the fields of electricity, electronics and military because of its high magnetic permeability, low coercive force and high resistivity. The anti-rust technology of silicon steel is crucial to ensure its long-term stability and energy efficiency reliability in related equipment in these application fields. At present, the common anti-rust oils on the market are mainly designed for carbon steel or low alloy steel materials, which cannot effectively form strong adhesion with the surface of silicon steel. The coating formed on the surface of silicon steel is often not uniform. Especially in humid or harsh environments, the anti-rust oil is easy to lose or partially fall off from the surface, resulting in unsatisfactory anti-rust effect. If a high-viscosity base oil is used to enhance the adhesion between the anti-rust oil and the surface of silicon steel, the oil film will become thicker. An overly thick oil film will increase the electromagnetic loss of silicon steel and affect its energy efficiency reliability. Therefore, the development of special anti-rust oil for silicon steel has become one of the problems that the silicon steel industry needs to solve. Summary of the invention

[0003] The present invention aims to improve at least one technical problem in the background technology.

[0004] On the one hand, the present invention provides a silicon steel anti-rust oil, comprising the following raw materials in parts by weight: 72-80 parts of base oil, 15-25 parts of rust inhibitor, 0.5-2 parts of surfactant and 0.1-1 parts of antioxidant; the rust inhibitor comprises calcium petroleum sulfonate and sodium petroleum sulfonate, and the weight ratio of calcium petroleum sulfonate to sodium petroleum sulfonate is (1-2):1.

[0005] The present invention fully considers the surface chemical properties of silicon steel, and the rust remover is selected from petroleum calcium sulfonate and petroleum sodium sulfonate and is compounded in a specific ratio, which can effectively form strong physical adsorption with the silicon steel surface, thereby ensuring the rust prevention effect of the rust-proof oil on silicon steel.

[0006] Preferably, the base value of the petroleum calcium sulfonate is greater than 295 mg KOH / g, and the calcium content of the petroleum calcium sulfonate is greater than or equal to 11.6%, so as to ensure the excellent salt spray rust prevention performance of the rust inhibitor.

[0007] Preferably, the sodium sulfonate content of the sodium petroleum sulfonate is ≥ 65%, and the molecular weight of the sodium petroleum sulfonate is 500 g / mol-530 g / mol, so as to ensure the anti-rust performance of the rust inhibitor.

[0008] Preferably, the rust inhibitor further comprises a calcium-based composite agent, which is composed of calcium dinonylnaphthalenesulfonate and carboxylate. The calcium content in the calcium-based composite agent is 1.5%, and the acid value is 90 mg KOH / g. The nonyl structure of calcium dinonylnaphthalenesulfonate has 6 side chains and has strong dehydration properties, which can further enhance the rust prevention ability of the rust inhibitor.

[0009] Preferably, the rust inhibitor further comprises at least one of zinc naphthenate or N-oleoylsarcosine-octadecylamine salt.

[0010] Preferably, the weight portion of the calcium-based complex is 3-4 parts, and the weight portion of N-oleoylsarcosine-octadecylamine salt is 1-2 parts.

[0011] Preferably, the base oil is isomerized solvent oil.

[0012] Isomeric solvent oil is a high-purity solvent oil obtained by an isomerization process. The addition of isomerized solvent oil in the present invention can make the silicon steel rust preventive oil of the present invention have relatively better chemical stability and excellent low-temperature fluidity (making it difficult to solidify in a low-temperature environment), and can more effectively dissolve a variety of organic compounds such as some additives / auxiliaries in the field of rust preventive oil, thereby improving the uniformity and glossiness of the silicon steel rust preventive oil of the present invention. The use of isomerized solvent oil as a base oil can make the silicon steel rust preventive oil form a thinner oil film, avoiding excessively thick oil films that increase the electromagnetic loss of silicon steel; not only that, further screening of rust preventives that do not contain barium salts combined with isomerized solvent oil can also make the silicon steel rust preventive oil of the present invention have the characteristics of low odor, thereby reducing the irritation and discomfort of the operator during the use of the silicon steel rust preventive oil of the present invention in an industrial environment. In addition, it also has the advantages of environmental protection, low toxicity, and little harm to the human body, and meets the requirements of many global environmental protection regulations.

[0013] Preferably, the surfactant is a sorbitan fatty acid ester.

[0014] More preferably, the surfactant is sorbitan monooleate Span-80.

[0015] Preferably, the antioxidant is 2,6-di-tert-butyl-p-cresol.

[0016] On the other hand, the present invention also provides a method for preparing the above silicon steel antirust oil, comprising the following steps:

[0017] Under the condition of 45° C.-55° C., the base oil and the rust inhibitor are mixed evenly, and then the surfactant and the antioxidant are added and mixed evenly to obtain the silicon steel rust preventive oil.

[0018] Beneficial effects: The present invention proposes a specific rust inhibitor composition in the rust-proof oil system, thereby achieving a strong physical adsorption effect on the surface of silicon steel, which well guarantees the rust-proof performance on silicon steel. At the same time, it has the characteristics of low odor and environmental protection, and can be industrially promoted and applied in the field of silicon steel rust prevention. DETAILED DESCRIPTION

[0019] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0020] The reagents / raw materials involved in the embodiments and comparative examples include:

[0021] Isogeneous solvent oil IP70: Beijing Beiran Industrial Group Co., Ltd.

[0022] Calcium petroleum sulfonate: Jinzhou Xinxing Petroleum Additives Co., Ltd.

[0023] N-Oleoylsarcosine-octadecylamine salt T711: Jinzhou Xinxing Petroleum Additives Co., Ltd.

[0024] Calcium-based compound CA-1295: King's Industries

[0025] Sodium petroleum sulfonate: Anhui Chengtai Chemical Technology Co., Ltd.

[0026] Zinc naphthenate: Nanjing Tianhong Chemical Co., Ltd.

[0027] Sorbitan monooleate Span-80: Nanjing Tianhong Chemical Co., Ltd.

[0028] 2,6-Di-tert-butyl-p-cresol: Tianjin Yitaicheng Chemical Technology Co., Ltd.

[0029] Example 1

[0030] A silicon steel antirust oil comprises the following raw materials in parts by weight: 73.9 parts of isomerized solvent oil IP70, 9 parts of petroleum calcium sulfonate, 9 parts of petroleum sodium sulfonate, 4 parts of calcium-based composite agent CA-1295, 2 parts of zinc naphthenate, 11 parts of N-oleoylsarcosine-octadecylamine salt T71, 1 part of sorbitan monooleate Span-80, and 0.1 part of 2,6-di-tert-butyl-p-cresol.

[0031] The preparation method of the silicon steel antirust oil of Example 1 is as follows:

[0032] Add 73.9 parts by weight of isomerized solvent oil IP70 into a clean beaker and stir at 50° C. for 15 minutes to obtain liquid A;

[0033] Slowly add 9 parts by weight of calcium petroleum sulfonate, 9 parts by weight of sodium petroleum sulfonate, 4 parts by weight of calcium-based composite agent CA-1295, 2 parts by weight of zinc naphthenate and 1 part by weight of N-oleoylsarcosine-octadecylamine salt T711 to liquid A, and stir at 50° C. for 30 minutes to obtain a mixed liquid B;

[0034] Slowly add 1 part by weight of sorbitan monooleate Span-80 and 0.1 part by weight of 2,6-di-tert-butyl-p-cresol to the mixed liquid B, and stir at 50° C. for 10 min to obtain silicon steel antirust oil.

[0035] Example 2

[0036] A silicon steel antirust oil comprises the following raw materials in parts by weight: 73.9 parts of isomerized solvent oil IP70, 12 parts of petroleum calcium sulfonate, 6 parts of petroleum sodium sulfonate, 4 parts of calcium-based composite agent CA-1295, 2 parts of zinc naphthenate, 1 part of N-oleoylsarcosine-octadecylamine salt T711, 1 part of sorbitan monooleate Span-80, and 0.1 part of 2,6-di-tert-butyl-p-cresol.

[0037] The preparation method of the silicon steel antirust oil of Example 2 is as follows:

[0038] Add 73.9 parts by weight of isomerized solvent oil IP70 into a clean beaker and stir at 50° C. for 15 minutes to obtain liquid A;

[0039] Slowly add 12 parts by weight of calcium petroleum sulfonate, 6 parts by weight of sodium petroleum sulfonate, 4 parts by weight of calcium-based composite agent CA-1295, 2 parts by weight of zinc naphthenate and 1 part by weight of N-oleoylsarcosine-octadecylamine salt T711 to liquid A, and stir at 50° C. for 30 minutes to obtain a mixed liquid B;

[0040] Slowly add 1 part by weight of sorbitan monooleate Span-80 and 0.1 part by weight of 2,6-di-tert-butyl-p-cresol to the mixed liquid B, and stir at 50° C. for 10 min to obtain silicon steel antirust oil.

[0041] Example 3

[0042] A silicon steel antirust oil comprises the following raw materials in parts by weight: 73.9 parts of isomerized solvent oil IP70, 9 parts of petroleum calcium sulfonate, 9 parts of petroleum sodium sulfonate, 3 parts of calcium-based composite agent CA-1295, 2 parts of zinc naphthenate, 11 parts of N-oleoylsarcosine-octadecylamine salt T71, 1 part of sorbitan monooleate Span-80, and 0.1 part of 2,6-di-tert-butyl-p-cresol.

[0043] The preparation method of the silicon steel antirust oil of Example 3 is as follows:

[0044] Add 73.9 parts by weight of isomerized solvent oil IP70 into a clean beaker and stir at 50° C. for 15 minutes to obtain liquid A;

[0045] Slowly add 9 parts by weight of calcium petroleum sulfonate, 9 parts by weight of sodium petroleum sulfonate, 3 parts by weight of calcium-based composite agent CA-1295, 2 parts by weight of zinc naphthenate and 1 part by weight of N-oleoylsarcosine-octadecylamine salt T711 to liquid A, and stir at 50° C. for 30 minutes to obtain a mixed liquid B;

[0046] Slowly add 1 part by weight of sorbitan monooleate Span-80 and 0.1 part by weight of 2,6-di-tert-butyl-p-cresol to the mixed liquid B, and stir at 50° C. for 10 min to obtain silicon steel antirust oil.

[0047] Example 4

[0048] A silicon steel antirust oil comprises the following raw materials in parts by weight: 72.9 parts of isomerized solvent oil IP70, 9 parts of petroleum calcium sulfonate, 9 parts of petroleum sodium sulfonate, 4 parts of calcium-based composite agent CA-1295, 2 parts of zinc naphthenate, 11 parts of N-oleoylsarcosine-octadecylamine salt T71, 1 part of sorbitan monooleate Span-80, and 0.1 part of 2,6-di-tert-butyl-p-cresol.

[0049] The preparation method of the silicon steel antirust oil of Example 4 is as follows:

[0050] Add 72.9 parts by weight of isomerized solvent oil IP70 into a clean beaker and stir at 50° C. for 15 minutes to obtain liquid A;

[0051] Slowly add 9 parts by weight of calcium petroleum sulfonate, 9 parts by weight of sodium petroleum sulfonate, 4 parts by weight of calcium-based composite agent CA-1295, 2 parts by weight of zinc naphthenate and 1 part by weight of N-oleoylsarcosine-octadecylamine salt T711 to liquid A, and stir at 50° C. for 30 minutes to obtain a mixed liquid B;

[0052] Slowly add 1 part by weight of sorbitan monooleate Span-80 and 0.1 part by weight of 2,6-di-tert-butyl-p-cresol to the mixed liquid B, and stir at 50° C. for 10 min to obtain silicon steel antirust oil.

[0053] Comparative Example 1

[0054] A rust-proof oil comprises the following raw materials in parts by weight: 73.9 parts of isomerized solvent oil IP70, 18 parts of calcium petroleum sulfonate, 3 parts of calcium-based composite agent CA-1295, 2 parts of zinc naphthenate, 1 part of N-oleoylsarcosine-octadecylamine salt T711, 1 part of sorbitan monooleate Span-80, and 0.1 part of 2,6-di-tert-butyl-p-cresol.

[0055] The preparation method of the rust-proof oil of Comparative Example 1 is as follows:

[0056] Add 73.9 parts by weight of isomerized solvent oil IP70 into a clean beaker and stir at 50° C. for 15 minutes to obtain liquid A;

[0057] Slowly add 18 parts by weight of petroleum calcium sulfonate, 3 parts by weight of calcium-based composite agent CA-12955, 2 parts by weight of zinc naphthenate and 1 part by weight of N-oleoylsarcosine-octadecylamine salt T711 to liquid A, and stir at 50° C. for 30 minutes to obtain a mixed liquid B;

[0058] Sorbitan monooleate Span-80 (1 part by weight) and 2,6-di-tert-butyl-p-cresol (0.1 part by weight) were slowly added to the mixed liquid B, and the mixture was stirred at 50° C. for 10 minutes to obtain anti-rust oil.

[0059] Comparative Example 2

[0060] A rust-proof oil comprises the following raw materials in parts by weight: 73.9 parts of isomerized solvent oil IP70, 18 parts of sodium petroleum sulfonate, 3 parts of calcium-based composite agent CA-1295, 2 parts of zinc naphthenate, 1 part of N-oleoylsarcosine-octadecylamine salt T711, 1 part of sorbitan monooleate Span-80, and 0.1 part of 2,6-di-tert-butyl-p-cresol.

[0061] The preparation method of the rust-proof oil of Comparative Example 2 is as follows:

[0062] Add 73.9 parts by weight of isomerized solvent oil IP70 into a clean beaker and stir at 50° C. for 15 minutes to obtain liquid A;

[0063] Slowly add 18 parts by weight of sodium petroleum sulfonate, 3 parts by weight of calcium-based composite agent CA-12955, 2 parts by weight of zinc naphthenate and 1 part by weight of N-oleoylsarcosine-octadecylamine salt T711 to liquid A, and stir at 50° C. for 30 minutes to obtain a mixed liquid B;

[0064] Sorbitan monooleate Span-80 (1 part by weight) and 2,6-di-tert-butyl-p-cresol (0.1 part by weight) were slowly added to the mixed liquid B, and the mixture was stirred at 50° C. for 10 minutes to obtain anti-rust oil.

[0065] Comparative Example 3

[0066] A rust-proof oil comprises the following raw materials in parts by weight: 73.9 parts of isomerized solvent oil IP70, 6 parts of calcium petroleum sulfonate, 12 parts of sodium petroleum sulfonate, 3 parts of calcium-based composite agent CA-1295, 2 parts of zinc naphthenate, 1 part of N-oleoylsarcosine-octadecylamine salt T711, 1 part of sorbitan monooleate Span-80, and 0.1 part of 2,6-di-tert-butyl-p-cresol.

[0067] The preparation method of the rust-proof oil of Comparative Example 3 is as follows:

[0068] Add 73.9 parts by weight of isomerized solvent oil IP70 into a clean beaker and stir at 50° C. for 15 minutes to obtain liquid A;

[0069] Slowly add 6 parts by weight of calcium petroleum sulfonate, 12 parts by weight of sodium petroleum sulfonate, 3 parts by weight of calcium-based composite agent CA-1295, 2 parts by weight of zinc naphthenate and 1 part by weight of N-oleoylsarcosine-octadecylamine salt T711 to liquid A, and stir at 50° C. for 30 minutes to obtain a mixed liquid B;

[0070] Sorbitan monooleate Span-80 (1 part by weight) and 2,6-di-tert-butyl-p-cresol (0.1 part by weight) were slowly added to the mixed liquid B, and the mixture was stirred at 50° C. for 10 minutes to obtain anti-rust oil.

[0071] Comparative Example 4

[0072] A rust-proof oil comprises the following raw materials in parts by weight: 73.9 parts of isomerized solvent oil IP70, 14 parts of calcium petroleum sulfonate, 4 parts of sodium petroleum sulfonate, 3 parts of calcium-based composite agent CA-1295, 2 parts of zinc naphthenate, 1 part of N-oleoylsarcosine-octadecylamine salt T711, 1 part of sorbitan monooleate Span-80, and 0.1 part of 2,6-di-tert-butyl-p-cresol.

[0073] The preparation method of the rust-proof oil of Comparative Example 4 is as follows:

[0074] Add 73.9 parts by weight of isomerized solvent oil IP70 into a clean beaker and stir at 50° C. for 15 minutes to obtain liquid A;

[0075] Slowly add 14 parts by weight of calcium petroleum sulfonate, 4 parts by weight of sodium petroleum sulfonate, 3 parts by weight of calcium-based composite agent CA-1295, 2 parts by weight of zinc naphthenate and 1 part by weight of N-oleoylsarcosine-octadecylamine salt T711 to liquid A, and stir at 50° C. for 30 minutes to obtain a mixed liquid B;

[0076] Sorbitan monooleate Span-80 (1 part by weight) and 2,6-di-tert-butyl-p-cresol (0.1 part by weight) were slowly added to the mixed liquid B, and the mixture was stirred at 50° C. for 10 minutes to obtain anti-rust oil.

[0077] Comparative Example 5

[0078] A rust-proof oil comprises the following raw materials in parts by weight: 73.9 parts of isomerized solvent oil IP70, 9 parts of calcium petroleum sulfonate, 9 parts of sodium petroleum sulfonate, 2 parts of calcium-based composite agent CA-1295, 2 parts of zinc naphthenate, 1 part of N-oleoylsarcosine-octadecylamine salt T711, 1 part of sorbitan monooleate Span-80, and 0.1 part of 2,6-di-tert-butyl-p-cresol.

[0079] The preparation method of the rust-proof oil of Comparative Example 5 is as follows:

[0080] Add 73.9 parts by weight of isomerized solvent oil IP70 into a clean beaker and stir at 50° C. for 15 minutes to obtain liquid A;

[0081] Slowly add 9 parts by weight of calcium petroleum sulfonate, 9 parts by weight of sodium petroleum sulfonate, 2 parts by weight of calcium-based composite agent CA-1295, 2 parts by weight of zinc naphthenate and 1 part by weight of N-oleoylsarcosine-octadecylamine salt T711 to liquid A, and stir at 50° C. for 30 minutes to obtain a mixed liquid B;

[0082] Sorbitan monooleate Span-80 (1 part by weight) and 2,6-di-tert-butyl-p-cresol (0.1 part by weight) were slowly added to the mixed liquid B, and the mixture was stirred at 50° C. for 10 minutes to obtain anti-rust oil.

[0083] Comparative Example 6

[0084] A rust-proof oil comprises the following raw materials in parts by weight: 73.9 parts of isomerized solvent oil IP70, 9 parts of calcium petroleum sulfonate, 9 parts of sodium petroleum sulfonate, 5 parts of calcium-based composite agent CA-1295, 2 parts of zinc naphthenate, 1 part of N-oleoylsarcosine-octadecylamine salt T711, 1 part of sorbitan monooleate Span-80, and 0.1 part of 2,6-di-tert-butyl-p-cresol.

[0085] The preparation method of the rust-proof oil of Comparative Example 6 is as follows:

[0086] Add 73.9 parts by weight of isomerized solvent oil IP70 into a clean beaker and stir at 50° C. for 15 minutes to obtain liquid A;

[0087] Slowly add 9 parts by weight of calcium petroleum sulfonate, 9 parts by weight of sodium petroleum sulfonate, 5 parts by weight of calcium-based composite agent CA-1295, 2 parts by weight of zinc naphthenate and 1 part by weight of N-oleoylsarcosine-octadecylamine salt T711 to liquid A, and stir at 50° C. for 30 minutes to obtain a mixed liquid B;

[0088] Sorbitan monooleate Span-80 (1 part by weight) and 2,6-di-tert-butyl-p-cresol (0.1 part by weight) were slowly added to the mixed liquid B, and the mixture was stirred at 50° C. for 10 minutes to obtain anti-rust oil.

[0089] Comparative Example 7

[0090] A rust-proof oil comprises the following raw materials in parts by weight: 73.9 parts of isomerized solvent oil IP70, 9 parts of calcium petroleum sulfonate, 9 parts of sodium petroleum sulfonate, 4 parts of calcium-based composite agent CA-1295, 2 parts of zinc naphthenate, 1 part of sorbitan monooleate Span-80, and 0.1 part of 2,6-di-tert-butyl-p-cresol.

[0091] The preparation method of the rust-proof oil of Comparative Example 7 is as follows:

[0092] Add 73.9 parts by weight of isomerized solvent oil IP70 into a clean beaker and stir at 50° C. for 15 minutes to obtain liquid A;

[0093] Slowly add 9 parts by weight of calcium petroleum sulfonate, 9 parts by weight of sodium petroleum sulfonate, 4 parts by weight of calcium-based composite agent CA-1295 and 2 parts by weight of zinc naphthenate to liquid A, and stir at 50° C. for 30 minutes to obtain a mixed liquid B;

[0094] Sorbitan monooleate Span-80 (1 part by weight) and 2,6-di-tert-butyl-p-cresol (0.1 part by weight) were slowly added to the mixed liquid B, and the mixture was stirred at 50° C. for 10 minutes to obtain anti-rust oil.

[0095] Comparative Example 8

[0096] A rust-proof oil comprises the following raw materials in parts by weight: 73.9 parts of isomerized solvent oil IP70, 9 parts of petroleum calcium sulfonate, 9 parts of petroleum sodium sulfonate, 4 parts of calcium-based composite agent CA-1295, 2 parts of zinc naphthenate, 3 parts of N-oleylsarcosine-octadecylamine salt T711, 1 part of sorbitan monooleate Span-80, and 0.1 part of 2,6-di-tert-butyl-p-cresol.

[0097] The preparation method of the rust-proof oil of Comparative Example 8 is as follows:

[0098] Add 73.9 parts by weight of isomerized solvent oil IP70 into a clean beaker and stir at 50° C. for 15 minutes to obtain liquid A;

[0099] Slowly add 9 parts by weight of calcium petroleum sulfonate, 9 parts by weight of sodium petroleum sulfonate, 4 parts by weight of calcium-based composite agent CA-1295, 2 parts by weight of zinc naphthenate and 3 parts by weight of N-oleoylsarcosine-octadecylamine salt T711 to liquid A, and stir at 50° C. for 30 minutes to obtain a mixed liquid B;

[0100] Sorbitan monooleate Span-80 (1 part by weight) and 2,6-di-tert-butyl-p-cresol (0.1 part by weight) were slowly added to the mixed liquid B, and the mixture was stirred at 50° C. for 10 minutes to obtain anti-rust oil.

[0101] Comparative Examples 9-11

[0102] Comparative Examples 9-11 used three different common thin-film anti-rust oils on the market.

[0103] The test method of the silicon steel antirust oil or the antirust oil performance in the examples and comparative examples of the present application is as follows:

[0104] (1) Appearance is determined by visual inspection;

[0105] (2) Test the closed cup flash point of anti-rust oil according to the national standard GB / T 261;

[0106] (3) Test the kinematic viscosity of anti-rust oil according to the national standard GB / T 265;

[0107] (4) According to the petrochemical industry standard SH / T 0081, the salt spray test of rust-proof oil (the salt spray test of silicon steel uses silicon steel with a thickness of 0.2) is tested for rust resistance;

[0108] (5) According to the national standard GB / T 2361, the anti-rust property of anti-rust oil is tested under wet heat (the wet heat test of silicon steel uses silicon steel with a thickness of 0.2).

[0109] The test results are shown in Table 1, Table 2, Table 3 and Table 4.

[0110] Table 1 Test results of Examples 1-4

[0111] Test Category Example 1 Example 2 Example 3 Example 4 Appearance Brown transparent Dark brown transparent Brown transparent Brown transparent <![CDATA[Kinematic viscosity / mm 2 / s]]> 1.83 1.77 1.81 1.85 Flash point / ℃ 73.2 72.6 72.0 71.0 Salt spray anti-rust (standard) / h 156 153 155 156 Salt spray anti-rust (silicon steel) / h 38 36 38 38 Wet heat rust prevention (standard) / d 50 51 50 52 Wet heat rust prevention (silicon steel) / d 30 30 29 29

[0112] Table 2 Comparative Examples 1-4 Test Results

[0113] Test Category Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Appearance Brown transparent Brown transparent Brown transparent Brown transparent <![CDATA[Kinematic viscosity / mm 2 / s]]> 1.81 1.75 1.82 1.84 Flash point / ℃ 73.7 72.9 71.0 71.7 Salt spray anti-rust (standard) / h 112 101 121 125 Salt spray anti-rust (silicon steel) / h 18 16 28 25 Wet heat rust prevention (standard) / d 28 27 31 32 Wet heat rust prevention (silicon steel) / d 19 21 25 23

[0114] The difference between the rust preventive oil in Comparative Examples 1-4 and Example 3 is that the compounding ratio of the calcium petroleum sulfonate and the sodium petroleum sulfonate rust preventives is different. By comparing the test results of Example 3 with those of Comparative Examples 1-4 (see Table 1 and Table 2), it can be found that the compounding ratio of the calcium petroleum sulfonate and the sodium petroleum sulfonate rust preventives in Example 3 has a better synergistic effect. The compounding ratio of the calcium petroleum sulfonate and the sodium petroleum sulfonate rust preventives in this dosage range can achieve the longest salt spray rust prevention cycle and wet heat rust prevention cycle.

[0115] Table 3 Comparative Examples 5-8 Test Results

[0116] Test Category Comparative Example 5 Comparative Example 6 Comparative Example 7 Comparative Example 8 Appearance Brown transparent Dark brown transparent Brown transparent Brown transparent <![CDATA[Kinematic viscosity / mm 2 / s]]> 1.75 1.85 1.76 1.85 Flash point / ℃ 74.2 72.6 73.0 71.6 Salt spray anti-rust (standard) / h 136 143 135 146 Salt spray anti-rust (silicon steel) / h 32 35 28 38 Wet heat rust prevention (standard) / d 50 51 45 50 Wet heat rust prevention (silicon steel) / d 25 28 25 27

[0117] The rust-proof oil in Comparative Examples 5-8 is different from that in Example 1 in that the addition amounts of the calcium-based composite agent CA-1295 and the N-oleoylsarcosine-octadecylamine salt T711 are different. By comparing the test results of Example 1 with those of Comparative Examples 5-8 (see Table 1 and Table 3), it can be found that the calcium-based composite agent CA-1295 and the N-oleoylsarcosine-octadecylamine salt T711 added in the proportion of Example 1 can achieve the longest salt spray rust-proof cycle and wet heat rust-proof cycle, and is also conducive to cost control.

[0118] Table 4 Comparative Examples 9-11 Test Results

[0119]

[0120]

[0121] By comparing the test results of Example 1 with those of Comparative Examples 9-11 (see Table 1 and Table 4), it can be found that the salt spray and wet heat rust prevention performance of ordinary thin-film rust preventive oil on the market is poor when applied to silicon steel, which is significantly different from the salt spray and wet heat rust prevention performance of Example 1.

[0122] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the method of the present invention. These improvements and supplements should also be regarded as the scope of protection of the present invention.

Claims

1. A silicon steel anti-rust oil, characterized in that: The invention comprises the following raw materials in parts by weight: 72-80 parts of base oil, 15-25 parts of rust inhibitor, 0.5-2 parts of surfactant and 0.1-1 parts of antioxidant; the rust inhibitor comprises calcium petroleum sulfonate and sodium petroleum sulfonate, and the weight ratio of the calcium petroleum sulfonate to the sodium petroleum sulfonate is (1-2):

1.

2. The silicon steel antirust oil according to claim 1, characterized in that: The alkalinity value of the petroleum calcium sulfonate is greater than 295 mgKOH / g, and the calcium content of the petroleum calcium sulfonate is greater than or equal to 11.6%.

3. The silicon steel antirust oil according to claim 1, characterized in that: The sodium sulfonate content of the sodium petroleum sulfonate is ≥65%, and the molecular weight of the sodium petroleum sulfonate is 500 g / mol-530 g / mol.

4. The silicon steel antirust oil according to claim 1, characterized in that: The rust inhibitor further comprises a calcium-based composite agent, which is composed of calcium dinonylnaphthalenesulfonate and carboxylate.

5. The silicon steel antirust oil according to claim 4, characterized in that: The rust inhibitor further comprises at least one of zinc naphthenate and N-oleoylsarcosine-octadecylamine salt.

6. The silicon steel antirust oil according to claim 5, characterized in that: The weight portion of the calcium-based complex is 3-4 parts, and the weight portion of the N-oleoylsarcosine-octadecylamine salt is 1-2 parts.

7. The silicon steel antirust oil according to claim 5, characterized in that: The base oil is isomerized solvent oil.

8. The silicon steel antirust oil according to claim 1, characterized in that: The surfactant is sorbitan fatty acid ester.

9. The silicon steel antirust oil according to claim 1, characterized in that: The antioxidant is 2,6-di-tert-butyl-p-cresol.

10. A method for preparing silicon steel antirust oil according to any one of claims 1 to 9, characterized in that: The following steps are involved: Under the condition of 45° C.-55° C., the base oil and the rust inhibitor are mixed evenly, and then the surfactant and the antioxidant are added and mixed evenly to obtain the silicon steel rust preventive oil.

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