Environment-friendly antirust oil and preparation method and application thereof

Abstract

The application belongs to the technical field of rust-proof oil, and discloses an environment-friendly rust-proof oil and a preparation method and application thereof, the environment-friendly rust-proof oil comprises the following raw materials in parts by weight: base oil 68.1-79.2 parts, rust-proof agent 16.7-23.5 parts, film forming agent 2-5 parts, surfactant 2-3 parts and antioxidant 0.1-0.4 parts; wherein the rust-proof agent comprises low-alkali calcium sulfonate, dinaonaphthalene sulfonamide, dodecenyl butanedioic acid, magnesium lanolin soap and N-oleoyl sarcosine-octadecylamine salt with a mass ratio of (10-12):(4-6):(0.2-0.5):(2-4):(0.5-1). The application effectively solves the core technical pain points of the existing environment-friendly rust-proof oil, such as insufficient environmental protection compliance, insufficient rust-proof time limit and poor long-term stability, realizes the synergistic improvement of the environmental protection performance, long-acting rust-proof performance and long-term stability, adapts to the actual protection scene of industry, improves the practicality and application value of the environment-friendly rust-proof oil, provides reliable long-acting protection for metal products and promotes the technical upgrading of the environment-friendly rust-proof oil industry.

Description

Technical Field

[0001] This application belongs to the field of rust-preventive oil technology, and specifically relates to an environmentally friendly rust-preventive oil, its preparation method, and its application. Background Technology

[0002] In industrial production, rust-preventive oil is a key material for protecting metal products. Its environmental protection performance, rust prevention properties, and long-term stability directly affect the storage and transportation safety and service life of metal products. Rust-preventive oil that meets environmental standards and is suitable for the long-term protection needs of industries has become a key focus of industry research and development.

[0003] Currently available environmentally friendly rust-preventive oils have many technical shortcomings, making them difficult to adapt to the actual application needs of downstream industries. On the one hand, the research and development of existing environmentally friendly rust-preventive oils is mostly limited to the basic environmental indicator of being free of heavy metal barium. Some products may still contain components that do not meet environmental requirements, and they do not fully consider both environmental compliance and functional stability. At the same time, the research and development process has not taken into account the actual needs of downstream industrial scenarios for long-term rust prevention, and has not systematically designed and verified the actual rust prevention time of the products. The core reason is that the formulation design stage focuses too much on meeting the heavy metal barium indicator, without targeted optimization of key functional components such as corrosion inhibitors and film-forming agents, and lacks systematic consideration and quantitative testing of rust prevention time under actual application scenarios, resulting in their rust prevention effect failing to meet the long-term protection requirements of industrial applications. On the other hand, the existing qualification standards for environmentally friendly rust-preventive oils are limited to the appearance when the mixture is ready. They do not include the long-term stability of the product in the core assessment indicators, nor do they conduct systematic long-term stability tests. The long-term compatibility between the components of the formula is ignored during the research and development process. The changes in the physicochemical properties and performance stability of the product after long-term storage are not thoroughly studied and verified. As a result, the product is prone to phenomena such as layering, turbidity and performance degradation during storage, transportation and long-term use, and the continuous rust-preventive performance cannot be guaranteed. Summary of the Invention

[0004] This application aims to improve at least one technical problem in the background art.

[0005] The first aspect of this application provides an environmentally friendly rust-preventive oil, comprising the following raw materials in parts by weight: Base oil 68.1-79.2 parts, rust inhibitor 16.7-23.5 parts, film-forming agent 2-5 parts, surfactant 2-3 parts, antioxidant 0.1-0.4 parts; The base oil is obtained by mixing a first base oil and a second base oil, wherein the first base oil is ISOPAR L or ISOPARM and the second base oil is REPROXAL TME 50 or REPROXAL 13 XA; The rust inhibitor comprises low-alkalinity calcium sulfonate, dinonylnaphthalenesulfonate amine, dodecenyl succinic acid, lanolin magnesium soap, and N-oleoylsarcosine-octadecylamine salt in a mass ratio of (10-12):(4-6):(0.2-0.5):(2-4):(0.5-1).

[0006] The environmentally friendly rust-preventive oil provided in this application effectively solves the problems of insufficient environmental compliance, poor rust-preventive performance, and poor long-term stability of existing environmentally friendly rust-preventive oils by rationally selecting raw material components and optimizing the ratio. It balances environmental protection, rust-preventive functionality, and usage stability, and is suitable for the needs of actual industrial application scenarios. The base oil is composed of two different specifications of components. The first base oil is ISOPAR L or ISOPAR M, which has a low aromatic content (aromatic mass fraction <0.01%). The second base oil is REPROXAL TME 50 or REPROXAL 13 XA, which is a fully synthetic ester base oil. It eliminates components such as mineral oil, naphthenic oil, and cracked oil that are not suitable for environmental protection requirements. The aromatic content is below the detection limit, and it has good biodegradability. Through the blending of the two, the stability of the rust-preventive oil film thickness can be guaranteed, while meeting the relevant environmental protection standards, providing a stable carrier basis for the entire rust-preventive oil system. The rust inhibitor employs a synergistic combination of multiple components, each playing a specific role while supporting the others. Low-alkalinity calcium sulfonate, through its polar groups, binds with metal ions on the metal surface to form stable complexes, enhancing the density of the protective film. Its long-chain alkyl groups also strengthen the bond between the protective film and the base oil, improving oil film toughness. Simultaneously, it acts as a dispersant, dispersing minute impurities and moisture in the system, reducing corrosion to the metal surface. Dinonylnaphthalenesulfonate, as an environmentally friendly component free of barium and heavy metals, exhibits excellent oil solubility and combines rust prevention, corrosion inhibition, and wetting and dispersing effects, assisting the main rust inhibitor in improving... It enhances rust prevention and system compatibility; dodecenyl succinic acid can form a strong oil film on the metal surface, providing protection for various metals and alloys, and can be used in conjunction with other rust inhibitors to extend rust prevention time; lanolin magnesium soap, through the dual action of electrostatic adsorption and chemical adsorption of polar carboxyl magnesium salt groups, directionally adheres to the metal surface to form a dense adsorption protective film, effectively isolating corrosive media such as water and oxygen, and its long-chain alkyl groups can also enhance the adhesion between the oil film and the metal surface and fill the gaps in the oil film; N-oleoylsarcosine-octadecylamine salt has excellent rust prevention performance and contains no prohibited substances, meeting environmental protection standards. The various rust inhibitor components work synergistically, with low-alkalinity calcium sulfonate and lanolin magnesium soap as the main rust inhibitors to construct the core protective system, forming a dense and stable protective film. Dinonylnaphthalenesulfonate amine, dodecenyl succinic acid and N-oleoylsarcosine-octadecylamine salt are used as auxiliary rust inhibitors, which supplement and strengthen the system in terms of compatibility, multi-metal protection and rust prevention time. At the same time, the dispersion and wetting effects of each component work together to improve compatibility with base oil and other components, avoid the introduction of harmful components, and further enhance the rust prevention effect and system stability.The rational addition of film-forming agents, surfactants, and antioxidants further enhances the overall performance of rust-preventive oils. Film-forming agents optimize film formation, surfactants improve the dispersibility and compatibility of each component, preventing problems such as stratification and turbidity in the system, and antioxidants inhibit oxidative degradation, delay performance decay, and ensure the performance stability of rust-preventive oils during long-term use. The synergistic effect of each component enables the prepared environmentally friendly rust-preventive oil to meet the core requirements of long-term protection in downstream industries.

[0007] Preferably, the above-mentioned environmentally friendly rust-preventive oil comprises the following raw materials in parts by weight: 71.4-75.7 parts base oil, 19.4-22.1 parts rust inhibitor, 3-5 parts film-forming agent, 2-3 parts surfactant, and 0.1-0.4 parts antioxidant.

[0008] Preferably, the mass ratio of the first base oil to the second base oil is (35-40):35.

[0009] Preferably, the first base oil is ISOPAR L and the second base oil is REPROXAL TME 50.

[0010] When ISOPAR L is used alone, its viscosity is relatively low, making it difficult to effectively guarantee the film thickness and protective durability of the rust-preventive oil, which is not conducive to achieving long-term rust prevention. On the other hand, when REPROXAL TME 50 is used alone, its viscosity is relatively high, and its viscosity is less than 6 mm at 40°C. 2 Low-viscosity base oils, with a viscosity of only 1 / s, often lack sufficient wettability, making it difficult to achieve uniform penetration of rust inhibitors. However, when ISOPAR L and REPROXAL TME 50 are combined, they form a complementary base oil system. ISOPAR L, with its excellent strong wetting properties, enables the rust inhibitor to fully penetrate all areas of the metal surface, including the interior of tiny crevices, ensuring comprehensive contact between the rust inhibitor and the metal surface and laying the foundation for efficient protection. REPROXAL TME 50, with its relatively high viscosity, stably locks the rust inhibitor to the metal surface, slowing down its migration and loss. This results in a more stable and durable rust-preventive film, preventing the protective effect from diminishing due to additive loss. This specific base oil combination further enhances the compatibility between the base oil and the rust-preventive system, making the protective effect of the rust-preventive oil more uniform and longer-lasting, better meeting the actual needs for long-term protection in industrial settings.

[0011] The preparation method of the aforementioned base oil includes the following steps: The first base oil and the second base oil are mixed at 55℃-60℃ to obtain the base oil.

[0012] Preferably, the film-forming agent mentioned above includes ALOX 2100. This component has multiple functions including rust prevention, corrosion inhibition, wetting and dispersion, and compatibility optimization. It is free of barium, heavy metals, and high-chlorine and high-sulfur components, and can be well adapted to the environmentally friendly base oil system described in this application. It works synergistically with the rust inhibitor to significantly improve the rust prevention density and long-term stability of the system, while improving the film uniformity of the rust-preventive oil, making it suitable for industrial multi-material metal protection scenarios.

[0013] Preferably, the surfactant comprises sorbitan monooleate and pentaerythritol fatty acid ester in a mass ratio of 1:1. Sorbitan monooleate possesses both oil solubility and certain surface activity, improving the dispersibility of each component. Pentaerythritol fatty acid ester exhibits strong hydrophobicity and excellent compatibility with environmentally friendly base oils. The mixing of these two components in this ratio allows for complementary effects of polar group adsorption and film-forming assistance, maximizing the filling of gaps in the protective film, enhancing oil film density, and simultaneously improving the oil film's water resistance and adhesion to extend rust prevention time. It also optimizes system stability, delays oxidative deterioration, and allows for controlled dosage while ensuring performance, reducing procurement and formulation costs and avoiding performance redundancy or waste caused by excessive use of a single component.

[0014] Preferably, the antioxidant mentioned above includes octadecyl β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate. This component has good compatibility with pentaerythritol fatty acid esters in the system. Its mechanism of action is to provide hydrogen atoms through hindered phenolic hydroxyl groups in the molecular structure, terminating the oxidation chain reaction in the rust-preventive oil system, and rapidly capturing free radicals generated in the system, thereby inhibiting the ester hydrolysis and oxidation of pentaerythritol fatty acid esters and the oxidative degradation of environmentally friendly base oils, while also helping to improve the long-term stability of the system.

[0015] The second aspect of this application provides a method for preparing the aforementioned environmentally friendly rust-preventive oil, comprising the following steps: Antioxidants and surfactants are added to the base oil and mixed for the first time. Then, rust inhibitors and film-forming agents are added and mixed for the second time to obtain an environmentally friendly rust-preventive oil.

[0016] The first mixing is carried out at 55℃-60℃.

[0017] The second mixing was carried out at 75°C.

[0018] The third aspect of this application provides the application of the aforementioned environmentally friendly rust-preventive oil in outdoor industrial equipment.

[0019] The beneficial effects of this application are as follows: This application effectively solves the core technical pain points of existing environmentally friendly rust-preventive oils, such as insufficient environmental compliance, insufficient rust prevention time, and poor long-term stability. It achieves a synergistic improvement in environmental performance, long-term rust prevention performance, and long-term stability, adapts to actual industrial protection scenarios, enhances the practicality and application value of environmentally friendly rust-preventive oils, provides reliable long-term protection for metal products, and promotes the technological upgrading of the environmentally friendly rust-preventive oil industry. Detailed Implementation

[0020] The present application will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the application. Furthermore, it should be understood that after reading the contents of this application, those skilled in the art can make various alterations or modifications to this application, and these equivalent forms also fall within the scope defined by the appended claims.

[0021] The reagents / raw materials involved in the following examples and comparative examples include: ISOPAR L: ExxonMobil (China) Investment Co., Ltd.; ISOPAR M: ExxonMobil (China) Investment Co., Ltd.; REPROXAL TME 50: Sasol (China) Chemical Co., Ltd.; REPROXAL 13 XA: Sasol (China) Chemical Co., Ltd.; 150SN: Fujian Guangsheng New Energy Co., Ltd.; D60: Maoming Shihua Dongcheng Chemical Co., Ltd., light white oil; Low-alkalinity calcium sulfonate: Shanghai Better Chemical Co., Ltd.; Dinonylnaphthalenesulfonate ammonium: Anhui Chengtai Chemical Technology Co., Ltd.; Dodecenyl succinic acid: Dongguan Wande New Materials Co., Ltd.; Lanolin magnesium soap: Dongguan Wande New Materials Co., Ltd.; N-Oleylsarcosine-Octylamine Salt: Dongguan Wande New Materials Co., Ltd.; ALOX 2100: Lubrizol Specialty Chemicals (Shanghai) Co., Ltd.; Sorbitol monooleate: Nanjing Weier Chemical Co., Ltd.; Pentaerythritol fatty acid esters: Hubei Tuoyuan Fine Chemical Co., Ltd.; β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl alcohol ester: Nanjing Chemical Co., Ltd.

[0022] Example 1 An environmentally friendly rust-preventive oil comprises the following raw materials in parts by weight: 72.7 parts base oil, 21.1 parts rust inhibitor, 4 parts film-forming agent (ALOX 2100), 2 parts surfactant, and 0.2 parts antioxidant (β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl alcohol ester).

[0023] The base oil is obtained by mixing ISOPAR L (aromatic mass fraction <0.01%) and REPROXALTME 50 (aromatic content below the detection limit) in a mass ratio of 37.7:35. The preparation method of the base oil includes the following steps: mixing ISOPAR L and REPROXALTME 50 at 55°C to obtain the base oil.

[0024] The rust inhibitors include low-alkalinity calcium sulfonate, dinonylnaphthalenesulfonate amine, dodecenyl succinic acid, lanolin magnesium soap, and N-oleoylsarcosine-octadecylamine salt in a mass ratio of 12:5:0.3:3:0.8.

[0025] The surfactant is a mixture of dehydrated sorbitan monooleate and pentaerythritol fatty acid ester in a mass ratio of 1:1.

[0026] The preparation method of this environmentally friendly rust-preventive oil includes the following steps: Antioxidants and surfactants are added to the base oil, and the mixture is first mixed at 55°C (stirring until the solution is transparent and uniform). Then, rust inhibitors and film-forming agents are added, and the mixture is second mixed at 75°C (stirring for 1 hour) to obtain an environmentally friendly rust-preventive oil.

[0027] Example 2 An environmentally friendly rust-preventive oil comprises the following raw materials in parts by weight: 72.7 parts base oil, 21.1 parts rust inhibitor, 4 parts film-forming agent (ALOX 2100), 2 parts surfactant, and 0.2 parts antioxidant (β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl alcohol ester).

[0028] The base oil is obtained by mixing ISOPAR L (aromatic mass fraction <0.01%) and REPROXAL 13 XA (aromatic content below the detection limit) in a mass ratio of 37.7:35. The preparation method of the base oil includes the following steps: mixing ISOPAR L and REPROXAL 13 XA at ​​55°C to obtain the base oil.

[0029] The rust inhibitors include low-alkalinity calcium sulfonate, dinonylnaphthalenesulfonate amine, dodecenyl succinic acid, lanolin magnesium soap, and N-oleoylsarcosine-octadecylamine salt in a mass ratio of 12:5:0.3:3:0.8.

[0030] The surfactant is a mixture of dehydrated sorbitan monooleate and pentaerythritol fatty acid ester in a mass ratio of 1:1.

[0031] The preparation method of this environmentally friendly rust-preventive oil includes the following steps: Antioxidants and surfactants are added to the base oil, and the mixture is first mixed at 55°C (stirring until the solution is transparent and uniform). Then, rust inhibitors and film-forming agents are added, and the mixture is second mixed at 75°C (stirring for 1 hour) to obtain an environmentally friendly rust-preventive oil.

[0032] Example 3 An environmentally friendly rust-preventive oil comprises the following raw materials in parts by weight: 72.4 parts base oil, 20.4 parts rust inhibitor, 5 parts film-forming agent (ALOX 2100), 2 parts surfactant, and 0.2 parts antioxidant (β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl alcohol ester).

[0033] The base oil is obtained by mixing ISOPAR L (aromatic mass fraction <0.01%) and REPROXALTME 50 (aromatic content below the detection limit) in a mass ratio of 37.7:35. The preparation method of the base oil includes the following steps: mixing ISOPAR L and REPROXALTME 50 at 55°C to obtain the base oil.

[0034] The rust inhibitors include low-alkalinity calcium sulfonate, dinonylnaphthalenesulfonate amine, dodecenyl succinic acid, lanolin magnesium soap, and N-oleoylsarcosine-octadecylamine salt in a mass ratio of 10:6:0.4:3:1.

[0035] The surfactant is a mixture of dehydrated sorbitan monooleate and pentaerythritol fatty acid ester in a mass ratio of 1:1.

[0036] The preparation method of this environmentally friendly rust-preventive oil includes the following steps: Antioxidants and surfactants are added to the base oil, and the mixture is first mixed at 55°C (stirring until the solution is transparent and uniform). Then, rust inhibitors and film-forming agents are added, and the mixture is second mixed at 75°C (stirring for 1 hour) to obtain an environmentally friendly rust-preventive oil.

[0037] Example 4 An environmentally friendly rust-preventive oil comprises the following raw materials in parts by weight: 72.4 parts base oil, 20.4 parts rust inhibitor, 5 parts film-forming agent (ALOX 2100), 2 parts surfactant, and 0.2 parts antioxidant (β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl alcohol ester).

[0038] The base oil is obtained by mixing ISOPAR L (aromatic mass fraction <0.01%) and REPROXAL 13 XA (aromatic content below the detection limit) in a mass ratio of 37.7:35. The preparation method of the base oil includes the following steps: mixing ISOPAR L and REPROXAL 13 XA at ​​55°C to obtain the base oil.

[0039] The rust inhibitors include low-alkalinity calcium sulfonate, dinonylnaphthalenesulfonate amine, dodecenyl succinic acid, lanolin magnesium soap, and N-oleoylsarcosine-octadecylamine salt in a mass ratio of 10:6:0.4:3:1.

[0040] The surfactant is a mixture of dehydrated sorbitan monooleate and pentaerythritol fatty acid ester in a mass ratio of 1:1.

[0041] The preparation method of this environmentally friendly rust-preventive oil includes the following steps: Antioxidants and surfactants are added to the base oil, and the mixture is first mixed at 55°C (stirring until the solution is transparent and uniform). Then, rust inhibitors and film-forming agents are added, and the mixture is second mixed at 75°C (stirring for 1 hour) to obtain an environmentally friendly rust-preventive oil.

[0042] Example 5 An environmentally friendly rust-preventive oil comprises the following raw materials in parts by weight: 72.4 parts base oil, 20.4 parts rust inhibitor, 5 parts film-forming agent (ALOX 2100), 2 parts surfactant, and 0.2 parts antioxidant (β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl alcohol ester).

[0043] The base oil is obtained by mixing ISOPAR M (aromatic mass fraction <0.01%) and REPROXAL 13 XA (aromatic content below the detection limit) in a mass ratio of 37.7:35. The preparation method of the base oil includes the following steps: mixing ISOPAR M and REPROXAL 13 XA at ​​55°C to obtain the base oil.

[0044] The rust inhibitors include low-alkalinity calcium sulfonate, dinonylnaphthalenesulfonate amine, dodecenyl succinic acid, lanolin magnesium soap, and N-oleoylsarcosine-octadecylamine salt in a mass ratio of 10:6:0.4:3:1.

[0045] The surfactant is a mixture of dehydrated sorbitan monooleate and pentaerythritol fatty acid ester in a mass ratio of 1:1.

[0046] The preparation method of this environmentally friendly rust-preventive oil includes the following steps: Antioxidants and surfactants are added to the base oil, and the mixture is first mixed at 55°C (stirring until the solution is transparent and uniform). Then, rust inhibitors and film-forming agents are added, and the mixture is second mixed at 75°C (stirring for 1 hour) to obtain an environmentally friendly rust-preventive oil.

[0047] Example 6 An environmentally friendly rust-preventive oil comprises the following raw materials in parts by weight: 72.4 parts base oil, 20.4 parts rust inhibitor, 5 parts film-forming agent (ALOX 2100), 2 parts surfactant, and 0.2 parts antioxidant (β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate octadecyl alcohol ester).

[0048] The base oil is obtained by mixing ISOPAR M (aromatic mass fraction <0.01%) and REPROXALTME 50 (aromatic content below the detection limit) in a mass ratio of 37.7:35. The preparation method of the base oil includes the following steps: mixing ISOPAR M and REPROXALTME 50 at 55°C to obtain the base oil.

[0049] The rust inhibitors include low-alkalinity calcium sulfonate, dinonylnaphthalenesulfonate amine, dodecenyl succinic acid, lanolin magnesium soap, and N-oleoylsarcosine-octadecylamine salt in a mass ratio of 10:6:0.4:3:1.

[0050] The surfactant is a mixture of dehydrated sorbitan monooleate and pentaerythritol fatty acid ester in a mass ratio of 1:1.

[0051] The preparation method of this environmentally friendly rust-preventive oil includes the following steps: Antioxidants and surfactants are added to the base oil, and the mixture is first mixed at 55°C (stirring until the solution is transparent and uniform). Then, rust inhibitors and film-forming agents are added, and the mixture is second mixed at 75°C (stirring for 1 hour) to obtain an environmentally friendly rust-preventive oil.

[0052] Comparative Example 1 A rust-preventive oil differs from Example 1 in that: the base oil comprises 78.7 parts by weight, obtained by mixing ISOPAR L and REPROXAL TME 50 in a mass ratio of 43.7:35; the rust inhibitor comprises 15.1 parts by weight, comprising low-alkalinity calcium sulfonate, dinonylnaphthalenesulfonate amine, dodecenyl succinic acid, lanolin magnesium soap, and N-oleoylsarcosine-octadecylamine salt in a mass ratio of 6:5:0.3:3:0.8. Everything else is the same as in Example 1.

[0053] Comparative Example 2 A rust-preventive oil differs from Example 1 in that: the base oil comprises 76.7 parts by weight, obtained by mixing ISOPAR L and REPROXAL TME 50 in a mass ratio of 41.7:35; the rust inhibitor comprises 17.1 parts by weight, including low-alkalinity calcium sulfonate, dinonylnaphthalenesulfonate amine, dodecenyl succinic acid, lanolin magnesium soap, and N-oleoylsarcosine-octadecylamine salt in a mass ratio of 8:5:0.3:3:0.8. Everything else is the same as in Example 1.

[0054] Comparative Example 3 A rust-preventive oil differs from Example 1 in that: the base oil comprises 70.7 parts by weight, obtained by mixing ISOPAR L and REPROXAL TME 50 in a mass ratio of 35.7:35; the rust inhibitor comprises 23.1 parts by weight, including low-alkalinity calcium sulfonate, dinonylnaphthalenesulfonate amine, dodecenyl succinic acid, lanolin magnesium soap, and N-oleoylsarcosine-octadecylamine salt in a mass ratio of 14:5:0.3:3:0.8. Everything else is the same as in Example 1.

[0055] Comparative Example 4 A rust-preventive oil differs from Example 1 in that: the base oil comprises 68.7 parts by weight, obtained by mixing ISOPAR L and REPROXAL TME 50 in a mass ratio of 33.7:35; the rust inhibitor comprises 25.1 parts by weight, including low-alkalinity calcium sulfonate, dinonylnaphthalenesulfonate amine, dodecenyl succinic acid, lanolin magnesium soap, and N-oleoylsarcosine-octadecylamine salt in a mass ratio of 16:5:0.3:3:0.8. Everything else is the same as in Example 1.

[0056] Comparative Example 5 A rust-preventive oil differs from Example 1 in that: the base oil comprises 75.7 parts by weight, obtained by mixing ISOPAR L and REPROXAL TME 50 in a mass ratio of 40.7:35; the rust inhibitor comprises 18.1 parts by weight, including low-alkalinity calcium sulfonate, dinonylnaphthalenesulfonate amine, dodecenyl succinic acid, lanolin magnesium soap, and N-oleoylsarcosine-octadecylamine salt in a mass ratio of 12:2:0.3:3:0.8. Everything else is the same as in Example 1.

[0057] Comparative Example 6 A rust-preventive oil differs from Example 1 in that: the base oil comprises 69.7 parts by weight, obtained by mixing ISOPAR L and REPROXAL TME 50 in a mass ratio of 34.7:35; the rust inhibitor comprises 24.1 parts by weight, including low-alkalinity calcium sulfonate, dinonylnaphthalenesulfonate amine, dodecenyl succinic acid, lanolin magnesium soap, and N-oleoylsarcosine-octadecylamine salt in a mass ratio of 12:8:0.3:3:0.8. Everything else is the same as in Example 1.

[0058] Comparative Example 7 A rust-preventive oil differs from Example 1 in that: the base oil comprises 72.9 parts by weight, obtained by mixing ISOPAR L and REPROXAL TME 50 in a mass ratio of 37.9:35; the rust inhibitor comprises 20.9 parts by weight, comprising low-alkalinity calcium sulfonate, dinonylnaphthalenesulfonate amine, dodecenyl succinic acid, lanolin magnesium soap, and N-oleoylsarcosine-octadecylamine salt in a mass ratio of 12:5:0.1:3:0.8. Everything else is the same as in Example 1.

[0059] Comparative Example 8 A rust-preventive oil differs from Example 1 in that: the base oil comprises 72.2 parts by weight, obtained by mixing ISOPAR L and REPROXAL TME 50 in a mass ratio of 37.2:35; the rust inhibitor comprises 21.6 parts by weight, comprising low-alkalinity calcium sulfonate, dinonylnaphthalenesulfonate amine, dodecenyl succinic acid, lanolin magnesium soap, and N-oleoylsarcosine-octadecylamine salt in a mass ratio of 12:5:0.8:3:0.8. Everything else is the same as in Example 1.

[0060] Comparative Example 9 A rust-preventive oil differs from Example 1 in that: the base oil comprises 74.7 parts by weight, obtained by mixing ISOPAR L and REPROXAL TME 50 in a mass ratio of 39.7:35; the rust inhibitor comprises 21.6 parts by weight, comprising low-alkalinity calcium sulfonate, dinonylnaphthalenesulfonate amine, dodecenyl succinic acid, lanolin magnesium soap, and N-oleoylsarcosine-octadecylamine salt in a mass ratio of 12:5:0.3:1:0.8. Everything else is the same as in Example 1.

[0061] Comparative Example 10 A rust-preventive oil differs from Example 1 in that: the base oil comprises 69.7 parts by weight, obtained by mixing ISOPAR L and REPROXAL TME 50 in a mass ratio of 34.7:35; the rust inhibitor comprises 24.1 parts by weight, comprising low-alkalinity calcium sulfonate, dinonylnaphthalenesulfonate amine, dodecenyl succinic acid, lanolin magnesium soap, and N-oleoylsarcosine-octadecylamine salt in a mass ratio of 12:5:0.3:6:0.8. Everything else is the same as in Example 1.

[0062] Comparative Example 11 A rust-preventive oil differs from Example 1 in that: the base oil comprises 73.2 parts by weight, obtained by mixing ISOPAR L and REPROXAL TME 50 in a mass ratio of 38.2:35; the rust inhibitor comprises 20.3 parts by weight, comprising low-alkalinity calcium sulfonate, dinonylnaphthalenesulfonate amine, dodecenyl succinic acid, lanolin magnesium soap, and N-oleoylsarcosine-octadecylamine salt in a mass ratio of 12:5:0.1:3:0.2. Everything else is the same as in Example 1.

[0063] Comparative Example 12 A rust-preventive oil differs from Example 1 in that: the base oil comprises 72 parts by weight, obtained by mixing ISOPAR L and REPROXAL TME 50 in a mass ratio of 37:35; the rust inhibitor comprises 22.3 parts by weight, including low-alkalinity calcium sulfonate, dinonylnaphthalenesulfonate amine, dodecenyl succinic acid, lanolin magnesium soap, and N-oleoylsarcosine-octadecylamine salt in a mass ratio of 12:5:0.8:3:1.5. Everything else is the same as in Example 1.

[0064] Comparative Example 13 A rust-preventive oil, differing from Example 1 in that the film-forming agent comprises 1 part by weight. Otherwise, it is the same as Example 1.

[0065] Comparative Example 14 A rust-preventive oil, differing from Example 1 in that the film-forming agent comprises 7 parts by weight. Otherwise, it is the same as Example 1.

[0066] Comparative Example 15 A rust-preventive oil, differing from Example 1 in that the surfactant is sorbitan monooleate and does not contain pentaerythritol fatty acid esters. Otherwise, it is the same as Example 1.

[0067] Comparative Example 16 A rust-preventive oil, differing from Example 1 in that the surfactant is pentaerythritol fatty acid ester and does not contain dehydrated sorbitan monooleate. Otherwise, it is the same as Example 1.

[0068] Comparative Example 17 A rust-preventive oil differs from Example 1 in that: the base oil comprises 73.2 parts by weight, obtained by mixing ISOPAR L and REPROXAL TME 50 in a mass ratio of 38.2:35; the rust inhibitor comprises 20.3 parts by weight, comprising low-alkalinity calcium sulfonate, dinonylnaphthalenesulfonate amine, dodecenyl succinic acid, lanolin magnesium soap, and N-oleoylsarcosine-octadecylamine salt in a mass ratio of 12:5:0.1:3:0.2; and the surfactant comprises 1 part by weight. All other aspects are the same as in Example 1.

[0069] Comparative Example 18 A rust-preventive oil differs from Example 1 in that: the base oil comprises 72 parts by weight, obtained by mixing ISOPAR L and REPROXAL TME 50 in a mass ratio of 37:35; the rust inhibitor comprises 22.3 parts by weight, comprising low-alkalinity calcium sulfonate, dinonylnaphthalenesulfonate amine, dodecenyl succinic acid, lanolin magnesium soap, and N-oleoylsarcosine-octadecylamine salt in a mass ratio of 12:5:0.8:3:1.5; and the surfactant comprises 4 parts by weight. All other aspects are the same as in Example 1.

[0070] Comparative Example 19 A rust-preventive oil, differing from Example 1 in that the base oil is a mixture of D60 and REPROXALTME 50 in a mass ratio of 37.7:35. Everything else is the same as in Example 1.

[0071] Comparative Example 20 A rust-preventive oil, differing from Example 1 in that the base oil is obtained by mixing ISOPAR L and 150SN in a mass ratio of 37.7:35. Everything else is the same as in Example 1.

[0072] Comparative Example 21 A rust-preventive oil, differing from Example 1 in that the base oil is obtained by mixing D60 and 150SN in a mass ratio of 37.7:35. Everything else is the same as in Example 1.

[0073] The test methods for the rust-preventive oil performance in the embodiments and comparative examples of this application are as follows: Appearance: Visually inspected.

[0074] Odor: Odor levels are assessed according to the BYDQ-A1901.404-2015 odor testing standard. At least three inspectors are required to conduct the rating test. If two inspectors' ratings differ by two levels or more, five inspectors are required to re-evaluate the odor. Odors are divided into levels 1 to 6 according to Table 3. The rating result is determined by the arithmetic mean of the ratings from different inspectors, rounded to one decimal place. The final rating uses a progressive system, allowing for levels between two levels, i.e., level 0.5 (e.g., an average value greater than 2 but less than 2.5 is level 2.5, and greater than 2.5 but less than 3 is level 3). Level 1 is odorless, Level 2 is slightly odorous but not interfering, Level 3 is noticeably odorous but not interfering, Level 4 is slightly interfering, Level 5 is significantly interfering, and Level 6 is an unbearable interfering odor. Interfering odors are those that are unpleasant and, with prolonged inhalation, can cause nausea, dizziness, or other adverse reactions.

[0075] Viscosity: As per GB / T 265-1988.

[0076] Low temperature stability test: Place in a refrigerator at 0℃ for 30 days and observe whether there is any precipitation or exudation.

[0077] Room temperature stability test: Use a constant temperature test chamber, place at a constant temperature of 25℃ for 30 days, and observe whether there is precipitation or exudation.

[0078] High temperature stability test: Use a constant temperature test chamber, keep it at a constant temperature of 70℃ for 30 days, and observe whether there is any precipitation or sedimentation.

[0079] Salt spray test: conducted in accordance with SH / T 0081-1991.

[0080] Damp heat test: conducted in accordance with GB / T 2361-1992.

[0081] The test results are shown in Tables 1-5.

[0082] Table 1 Table 2 Table 3 Table 4 Table 5 Table 6 Referring to the data in Tables 1-6, performance tests were conducted on the environmentally friendly rust-preventive oils prepared in Comparative Examples 1-4. The main difference between these oils and Example 1 is the different proportions of the rust inhibitor. Through comparisons of Example 1 and Comparative Examples 1-4, it can be observed that the low-alkalinity calcium sulfonate ratio rust inhibitor scheme in these examples exhibits better rust prevention. Using this dosage of low-alkalinity calcium sulfonate rust inhibitor achieves a longer salt spray rust prevention period and good stability while saving costs.

[0083] The performance of the rust-preventive oils prepared in Comparative Examples 5-8 was tested. The main difference between them and Example 1 was the different ratio of rust inhibitors. Through comparisons of Example 1 and Comparative Examples 5-8, it can be seen that the ratio of dinonylnaphthalenesulfonate amine to dodecenylsuccinic acid in the examples exhibits better rust prevention. Using this ratio of dinonylnaphthalenesulfonate amine to dodecenylsuccinic acid not only saves costs but also provides good appearance, achieves a longer salt spray rust prevention period, and demonstrates good stability.

[0084] The performance of the rust-preventive oils prepared in Comparative Examples 9-12 was tested. The main difference between them and Example 1 was the different proportions of the rust inhibitor. Through comparisons with Examples 1 and 9-12, it was found that the ratio of lanolin magnesium soap to N-oleoylsarcosine-octadecylamine salt in the examples exhibited better rust prevention. Using this ratio of lanolin magnesium soap to N-oleoylsarcosine-octadecylamine salt resulted in cost savings, good appearance without cloudiness, and achieved a longer salt spray rust prevention period and good stability.

[0085] The performance of the rust-preventive oils prepared in Comparative Examples 13-14 was tested. The main difference between them and Example 1 was the different proportion of the film-forming agent. Through comparisons of Example 1 and Comparative Examples 13-14, it can be seen that the ALOX 2100 film-forming agent ratio scheme in these examples has a better rust-preventive effect. Using this amount of ALOX 2100 scheme saves costs while maintaining a good appearance without any cloudiness or solidification, and achieves a longer salt spray rust prevention period and good stability.

[0086] The performance of the rust-preventive oils prepared in Comparative Examples 15-18 was tested, and the main difference from Example 1 was the different surfactant ratio. Through comparison with Examples 1 and 15-18, it can be seen that the 1:1 ratio of dehydrated sorbitan monooleate and pentaerythritol fatty acid ester in the examples has good rust-preventive effect. Using this amount of surfactant saves costs while maintaining a good appearance without clouding or solidification, and achieves a longer salt spray rust prevention period and good stability.

[0087] The performance of the rust-preventive oils prepared in Comparative Examples 19-21 was tested. The main difference between them and Example 1 lies in the different types of base oils used in the blend. The D60 and 150SN used in Comparative Examples 19-21 are both conventional petroleum distillate mineral hydrocarbon mixtures with complex internal components, including n-alkanes, isoalkanes, and cycloalkanes, as well as trace amounts of aromatics, unsaturated hydrocarbons, and polar sulfides. The overall component homogeneity is poor, making it impossible to form a stable and regular carrier system. The trace amounts of unsaturated hydrocarbons, cycloalkanes, and sulfide active components remaining in these mineral base oils can continue to volatilize slowly at room temperature, producing a strong and persistent mineral oil solvent odor, severely degrading the on-site operating environment and sensory experience. Furthermore, the large number of cyclic hydrocarbons and trace amounts of aromatics in the mineral hydrocarbon system are difficult to biodegrade, resulting in slow natural degradation of waste oils, long residual periods, and potential environmental risks from trace aromatics and sulfide components, failing to meet the compliance requirements of high-end green production. Complex and heterogeneous mineral components can interfere with the uniform dispersion and stable adsorption of rust inhibitors, easily causing uneven film formation and easy oxidation and deterioration of the oil, indirectly reducing the rust prevention time and product storage stability. In contrast, the compound base oil used in Example 1 has pure and highly homogeneous components, with no harmful residual impurities or volatile odor components. The resulting finished product has a lower odor, and the compatibility and stability of the oil system are significantly improved.

[0088] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0089] The above description is only a preferred embodiment of this application. It should be noted that those skilled in the art can make several improvements and additions without departing from the method of this application, and these improvements and additions should also be considered within the scope of protection of this application.

Claims

1. An environmentally friendly rust-preventive oil, characterized in that, The raw materials include the following parts by weight: base oil 68.1-79.2 parts, rust inhibitor 16.7-23.5 parts, film-forming agent 2-5 parts, surfactant 2-3 parts, and antioxidant 0.1-0.4 parts; The base oil is obtained by mixing a first base oil and a second base oil, wherein the first base oil is ISOPAR L or ISOPAR M, and the second base oil is REPROXAL TME 50 or REPROXAL 13 XA; The rust inhibitor comprises low-alkalinity calcium sulfonate, dinonylnaphthalenesulfonate amine, dodecenyl succinic acid, lanolin magnesium soap, and N-oleoylsarcosine-octadecylamine salt in a mass ratio of (10-12):(4-6):(0.2-0.5):(2-4):(0.5-1).

2. The environmentally friendly rust-preventive oil according to claim 1, characterized in that, The raw materials include the following parts by weight: base oil 71.4-75.7 parts, rust inhibitor 19.4-22.1 parts, film-forming agent 3-5 parts, surfactant 2-3 parts, and antioxidant 0.1-0.4 parts.

3. The environmentally friendly rust-preventive oil according to claim 1, characterized in that, The mass ratio of the first base oil to the second base oil is (35-40):

35.

4. The environmentally friendly rust-preventive oil according to claim 1, characterized in that, The method for preparing the base oil includes the following steps: The first base oil and the second base oil are mixed at 55°C-60°C to obtain the base oil.

5. The environmentally friendly rust-preventive oil according to claim 1, characterized in that, The film-forming agent includes ALOX 2100.

6. The environmentally friendly rust-preventive oil according to claim 1, characterized in that, The surfactant comprises sorbitan monooleate and pentaerythritol fatty acid ester in a mass ratio of 1:

1.

7. The environmentally friendly rust-preventive oil according to claim 1, characterized in that, The antioxidant includes octadecyl β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate.

8. A method for preparing an environmentally friendly rust-preventive oil as described in any one of claims 1-7, characterized in that, Includes the following steps: The antioxidant and the surfactant are added to the base oil and mixed for the first time. Then the rust inhibitor and the film-forming agent are added and mixed for the second time to obtain the environmentally friendly rust-preventive oil.

9. The method for preparing the environmentally friendly rust-preventive oil according to claim 8, characterized in that, The first mixing was carried out at 55℃-60℃; And / or, the second mixing is carried out at 75°C.

10. The application of the environmentally friendly rust-preventive oil as described in any one of claims 1-7 in outdoor industrial equipment.

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