Rust-proof oil sludge removing water-based cleaning agent and preparation method thereof

Abstract

This invention relates to a rust-preventive, degreasing, and sludge-removing water-based cleaning agent and its preparation method, belonging to the field of metal surface cleaning technology. This invention aims to solve the problems of low efficiency in removing old sludge from existing water-based cleaning agents, easy rust re-emergence in cleaned metals, and the inability of a single product to simultaneously address cleaning and rust prevention. It consists of the following components by weight percentage: 2%-7% fatty alcohol polyoxyethylene ether (AEO-9), 2%-5% oil stain remover, 3%-10% emulsifier, 3%-12% rust and corrosion inhibitor, 10%-20% alkaline additive, 2%-6% solubilizer, 0.05%-0.15% defoamer, and the balance being deionized water. This invention is suitable for surface cleaning of various metal materials such as carbon steel, cast iron, and stainless steel, and can meet the cleaning and rust prevention needs of various industrial equipment such as machine tools, injection molding machines, engines, and hardware accessories.

Description

Technical Field

[0001] This invention belongs to the field of metal surface cleaning technology. Specifically, it relates to a rust-preventive degreasing and sludge-removing water-based cleaning agent and its preparation method. The water-based cleaning agent is used to clean heavy oil stains and sludge on the surface of metal equipment, while providing short-term rust prevention protection. Background Technology

[0002] During long-term operation, industrial equipment (such as machine tools, injection molding machines, and engines) often accumulates a complex contaminant, known as "sludge," on its surface and inside. This sludge is composed of a mixture of lubricating oil, hydraulic oil, cutting fluid, dust, metal shavings, and process residues. It is typically characterized by high viscosity, high adhesion, multi-layered accumulation, and partial carbonization or polymerization. Its dense structure and strong adhesion make it difficult for conventional cleaning methods to effectively penetrate and completely remove it in a short time.

[0003] Traditional solvent-based cleaning agents (such as gasoline, kerosene, and white spirit) have significant drawbacks: they are flammable and explosive, posing high safety risks; they emit large amounts of VOCs, causing severe environmental pollution; harmful volatile substances damage the health of operators; and they themselves have no rust-preventing function.

[0004] Ordinary water-based cleaning agents are not strong enough to penetrate and remove thick layers of sludge, making it difficult to effectively remove stubborn dirt. After cleaning, metal surfaces are prone to flash rust, and they do not have rust prevention function, requiring an additional independent rust prevention process, which leads to reduced cleaning efficiency, complicated operation and increased cost. Summary of the Invention

[0005] This invention aims to solve the problems of low efficiency in removing old grease and sludge by existing water-based cleaning agents, easy rusting of metal after cleaning, and the inability of a single product to simultaneously achieve cleaning and rust prevention. It provides a water-based cleaning agent with high penetration, fast grease and sludge removal, and automatic formation of a rust-preventive protective film on the metal surface after cleaning, thereby achieving efficient integrated degreasing and rust prevention.

[0006] To address the aforementioned technical problems, the present invention adopts the following technical solution: The purpose of this invention is to provide a rust-preventive, degreasing, and mud-removing water-based cleaning agent, composed of the following components by weight percentage: 2%-7% fatty alcohol polyoxyethylene ether (AEO-9), 2%-5% oil stain remover, 3%-10% emulsifier, 3%-12% rust and corrosion inhibitor, 10%-20% alkaline additive, 2%-6% solubilizer, 0.05%-0.15% defoamer and the balance being deionized water; The mass ratio of fatty alcohol polyoxyethylene ether (AEO-9) to oil stain remover is 1:(0.5-2).

[0007] To further specify, the oil stain remover is oil stain remover TTM.

[0008] Further specifying, the emulsifier is emulsifier 6501, emulsifier NP-10, or Pingpingjia O25.

[0009] Further specifying, the rust inhibitor is octanoic acid, sebacic acid, or dodecanoic acid.

[0010] Further specifying, the alkaline auxiliaries are monoethanolamine, diethanolamine, or triethanolamine.

[0011] Further specifying, the solubilizer is sodium isopropylbenzenesulfonate.

[0012] Furthermore, the defoamer is specified as a polyether-modified silicone defoamer, such as B237 from Guangdong Zhongke Hongtai New Materials.

[0013] Another object of the present invention is to provide a method for preparing the above-mentioned rust-preventing degreasing water-based cleaning agent.

[0014] A method for preparing a rust-preventive, degreasing, and sludge-removing water-based cleaning agent includes the following steps: Step 1: Heat deionized water to 40℃-60℃ while stirring at 200r / min. Add rust inhibitor, alkaline additive, emulsifier and AEO-9 in sequence, and continue stirring until completely dissolved. Step 2: Then cool down to below 40°C, adjust the stirring speed to 300r / min~400r / min, add the oil stain remover, solubilizer and defoamer in sequence, stir until uniform, let stand to defoam, filter, and obtain the water-based cleaning agent.

[0015] Further specified, it is filtered through a 200-mesh filter.

[0016] The composite penetrant of this invention is used to penetrate and soften stubborn sludge, disrupting its adhesion to the metal substrate; the emulsifier is used to quickly emulsify and disperse the stripped grease in the cleaning solution, preventing re-adhesion of oil stains; the rust inhibitor is used to directionally adsorb onto the metal surface to form a dense protective film, effectively inhibiting flash rust formation and providing inter-process rust protection after cleaning; the alkaline additive is used to adjust the pH value of the system to enhance detergency and assist in the saponification of some grease; the solubilizer is used to improve the solubility and compatibility of each component in the system, ensuring the homogeneous stability of the cleaning agent during use. The synergistic effect of these components gives this cleaning agent excellent film-forming and penetrating properties. It exhibits outstanding penetration, gripping, and stripping effects on dried, hardened, or deteriorated stubborn sludge; simultaneously, it effectively neutralizes acidic corrosive substances on the metal surface and spontaneously forms a strong, dense monomolecular adsorption film on the steel surface, providing reliable inter-process rust protection. Therefore, this invention achieves efficient sludge removal while endowing the metal surface with inherent rust-preventive capabilities, eliminating the need for additional rust-prevention processes.

[0017] Compared with the prior art, the present invention has the following beneficial effects: This invention offers high oil sludge removal efficiency: the composite penetrant and emulsifier work synergistically to quickly penetrate and thoroughly remove stubborn, long-standing oil sludge from the surfaces of machine tools, engines, and other equipment. Under normal temperature conditions, immersion or spraying for 5-10 minutes is sufficient to completely remove the oil sludge, demonstrating significantly higher cleaning efficiency than ordinary water-based cleaning agents.

[0018] The present invention integrates cleaning and rust prevention: the rust inhibitor can form a dense monomolecular adsorption film on the metal surface. After cleaning, no additional rust prevention process is required, which can provide 7-15 days of inter-process rust prevention protection for metal surfaces such as steel, effectively avoiding flash rust and rust return problems.

[0019] The invention is environmentally friendly and safe: This product is a water-based system, posing no risk of flammability or explosion, with zero VOC emissions, meeting industrial environmental protection requirements. The system has a weakly alkaline pH value, causing no irritation to the skin of operators and no corrosion to metal surfaces, ensuring high safety in use.

[0020] The system of this invention exhibits good stability: the addition of solubilizers effectively improves the compatibility of each functional component. The finished product shows no stratification, precipitation, or oil floating after storage at room temperature for more than 6 months, and can be used normally within a temperature range of -5℃ to 45℃, making it suitable for a wide range of applications.

[0021] This invention boasts low operating costs: it can be directly diluted at a ratio of 1:5 to 1:20, and requires no rinsing after cleaning, saving water resources and cleaning time. The integrated design reduces the processes and raw material costs required for separate rust prevention, resulting in an overall cost reduction of over 30% compared to traditional solutions.

[0022] This invention is highly versatile: it is suitable for surface cleaning of various metal materials such as carbon steel, cast iron, and stainless steel, and can meet the cleaning and rust prevention needs of various industrial equipment such as machine tools, injection molding machines, engines, and hardware accessories.

[0023] For a deeper understanding of the features and technical content of this invention, please refer to the accompanying detailed description and drawings. It should be noted that the drawings are provided for illustrative purposes only and are not intended to limit the scope of the invention. Attached Figure Description

[0024] Figure 1 A is a cast iron test piece after cleaning with the cleaning agent of the present invention (stored for 10 days). Figure 1 B is a cast iron test piece after being cleaned with a common water-based cleaning agent (and left for 10 days). Figure 2 This is the appearance after degreasing, as shown in Example 1; Figure 3 This is the appearance after degreasing, as shown in Example 2; Figure 4This is the appearance after degreasing, as shown in Example 3. Detailed Implementation

[0025] The present invention will be described in detail below with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but should not be considered as limiting the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0026] Example 1: The rust-preventive degreasing and mud-removing water-based cleaning agent of this example is composed of the following components by weight percentage: The following ingredients were prepared according to the following steps: 2% fatty alcohol polyoxyethylene ether (AEO-9), 2% oil stain remover TTM, 3% emulsifier 6501, 3% octanoic acid, 10% triethanolamine, 3% sodium isopropylbenzene sulfonate, 0.1% polyether-modified silicone defoamer B237, and the balance deionized water. Step 1: Add deionized water to a stainless steel reactor and heat it to 40°C while stirring at 200 r / min. Then add rust and corrosion inhibitor (octanoic acid), alkaline additive (triethanolamine), emulsifier 6501, and AEO-9 in sequence, and continue stirring until completely dissolved. Step 2: Then, lower the temperature inside the reactor to 35°C, adjust the stirring speed to 300 r / min, and add oil stain remover TTM, sodium isopropylbenzene sulfonate, and polyether modified silicone defoamer B237 in sequence. Stir until uniform, turn off the stirring, let stand for 10 minutes to defoam, and filter through a 200-mesh filter to obtain the water-based cleaning agent.

[0027] Oil removal effect: The oil-stained workpiece was soaked in the diluted solution (1:10) at room temperature for 8 minutes and the oil was completely removed, leaving the surface clean. Rust prevention effect: After cleaning, the parts were placed at room temperature and pressure for 12 days, and there was no flash rust or rust return on the surface; System stability: The finished product remained uniform in state and showed no oil floating phenomenon after 6 months of storage at room temperature.

[0028] Example 2: The rust-preventive degreasing and mud-removing water-based cleaning agent of this example is composed of the following components by weight percentage: The following ingredients were prepared according to the following steps: 5% fatty alcohol polyoxyethylene ether (AEO-9), 3.5% oil stain remover TTM, 3% emulsifier 6501, 3% octanoic acid, 12% triethanolamine, 3% sodium isopropylbenzene sulfonate, 0.1% polyether-modified silicone defoamer B237, and the balance deionized water. Step 1: Add deionized water to a stainless steel reactor and heat it to 50°C while stirring at 200 r / min. Then add rust and corrosion inhibitor (octanoic acid), alkaline additive (triethanolamine), emulsifier 6501, and AEO-9 in sequence, and continue stirring until completely dissolved. Step 2: Then, lower the temperature inside the reactor to 38°C, adjust the stirring speed to 400 r / min, and add oil stain remover TTM, sodium isopropylbenzene sulfonate, and polyether modified silicone defoamer B237 in sequence. Stir until uniform, turn off the stirring, let stand for 12 minutes to defoam, and filter through a 200-mesh filter to obtain the water-based cleaning agent.

[0029] Oil removal effect: The finished product diluted solution (1:20) was used to soak the oil-stained workpiece at room temperature for 10 minutes, and the old oil sludge was completely removed without any residue; Rust prevention effect: After cleaning, the parts are placed at room temperature and pressure for 15 days, and the surface retains the original metal color without oxidation rust spots; System stability: After the finished product was refrigerated at -5℃ for 72 hours, it showed no stratification or crystallization after returning to room temperature, and its performance remained unchanged.

[0030] Example 3: The rust-preventive degreasing and sludge-removing water-based cleaning agent of this example is composed of the following components by weight percentage: The following ingredients were prepared according to the following steps: 7% fatty alcohol polyoxyethylene ether (AEO-9), 5% oil stain remover TTM, 3% emulsifier 6501, 3% octanoic acid, 1% dodecanoic acid, 15% triethanolamine, 3% sodium isopropylbenzene sulfonate, 0.1% polyether-modified silicone defoamer B237, and the balance deionized water. Step 1: Add deionized water to a stainless steel reactor and heat it to 60°C while stirring at 200 r / min. Then add rust and corrosion inhibitor (octanoic acid), alkaline additive (triethanolamine), emulsifier 6501, and AEO-9 in sequence, and continue stirring until completely dissolved. Step 2: Then, lower the temperature inside the reactor to 40°C, adjust the stirring speed to 400 r / min, and add oil stain remover TTM, sodium isopropylbenzene sulfonate, and polyether modified silicone defoamer B237 in sequence. Stir until uniform, turn off the stirring, let stand for defoaming for 15 min, and filter through a 200-mesh filter to obtain the water-based cleaning agent.

[0031] Oil removal effect: The finished product diluted solution (1:20) was used to soak the oil-stained workpiece at room temperature for 10 minutes, and the old oil sludge was completely removed without any residue; Rust prevention effect: After cleaning, the parts are placed at room temperature and pressure for 15 days, and the surface retains the original metal color without oxidation rust spots; System stability: After the finished product was refrigerated at -5℃ for 72 hours, it showed no stratification or crystallization after returning to room temperature, and its performance remained unchanged.

[0032] Depend on Figure 1 Test piece A showed no rust spots or oxidation marks on its surface, retaining its original metallic color; test piece B showed large areas of yellow rust spots on its surface, indicating severe oxidation, clearly demonstrating the excellent rust-preventing effect of the cleaning agent of this invention. Table 1

[0033] The specific embodiments of the present invention have been described in detail above. It should be noted that the present invention is not limited to the specific embodiments described above. Various modifications or alterations can be made by those skilled in the art without departing from the scope of protection defined by the claims, and all such modifications or alterations fall within the scope of the present invention.

Claims

1. A rust-preventive, degreasing, and mud-removing water-based cleaning agent, characterized in that, It consists of the following components by weight percentage: 2%-7% fatty alcohol polyoxyethylene ether (AEO-9), 2%-5% oil stain remover, 3%-10% emulsifier, 3%-12% rust and corrosion inhibitor, 10%-20% alkaline additive, 2%-6% solubilizer, 0.05%-0.15% defoamer and the balance being deionized water; The fatty alcohol polyoxyethylene ether (AEO-9) and the oil stain remover are in a mass ratio of 1:(0.5-2).

2. The water-based cleaning agent according to claim 1, characterized in that, It consists of the following components by weight percentage: 7% fatty alcohol polyoxyethylene ether (AEO-9), 5% stain remover, 3% emulsifier, 8% rust and corrosion inhibitor, 10% alkaline additive, 3% solubilizer, 0.1% defoamer and the balance is deionized water.

3. The water-based cleaning agent according to claim 1, characterized in that, The oil stain remover is called Oil Stain Remover TTM.

4. The water-based cleaning agent according to claim 1, characterized in that, The emulsifier is emulsifier 6501, emulsifier NP-10, or Pingpingjia O25.

5. The water-based cleaning agent according to claim 1, characterized in that, The rust and corrosion inhibitors are octanoic acid, sebacic acid, or dodecanoic acid.

6. The water-based cleaning agent according to claim 1, characterized in that, The alkaline additive is monoethanolamine, diethanolamine, or triethanolamine.

7. The water-based cleaning agent according to claim 1, characterized in that, The solubilizer is sodium isopropylbenzenesulfonate.

8. The water-based cleaning agent according to claim 1, characterized in that, The defoamer is a polyether-modified silicone defoamer.

9. The method for preparing the water-based cleaning agent according to any one of claims 1-8, characterized in that, Includes the following steps: Step 1: Heat deionized water to 40℃-60℃ while stirring at 200r / min, then add rust inhibitor, alkaline additive, emulsifier and AEO-9 in sequence, and continue stirring until completely dissolved; Step 2: Then cool down to below 40°C, adjust the stirring speed to 300r / min~400r / min, add the oil stain remover, solubilizer and defoamer in sequence, stir until uniform, let stand to defoam, filter, and obtain the water-based cleaning agent.

10. The method according to claim 9, characterized in that, Filtered through a 200-mesh filter.

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