Preparation method of semi-synthetic cutting fluid for black metal

Abstract

The invention relates to the technical field of cutting fluid, and discloses a preparation method of semi-synthetic cutting fluid for black metal, and the cutting fluid comprises the following components by weight: 10 parts of water; 8 parts of monoethanolamine; 4 parts of diethanol amine; 4 parts of boric acid; 2 parts of undecanedioic acid; 1 part of RL50 tribasic acid; 0.2 part of benzotriazole; 2 parts of glycerol; 20 parts of naphthenic oil; 3 parts of tetrameric ricinoleate; 3 parts of tall oil; 3 parts of fatty alcohol-polyoxyethylene ether; 0.8 part of fatty alcohol polyoxyethylene ether carboxylic acid; 0.5 part of phosphate ester; 0.5 part of 21 carbon dibasic acid; 3 parts of N, N '-methylene dimorpholine; 34.8 parts of deionized water; and 0.2 part of a three-dimensional siloxane defoaming agent. The anti-rust and anti-corrosion cutting fluid has excellent anti-rust and anti-corrosion performance, can effectively prevent a machine tool and a machined part from being rusted and has comprehensive antibacterial characteristics, and the product can be used for a long time and hardly has decay and stink phenomena.

Description

Technical Field

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[0001] The present invention relates to the technical field of cutting fluids, and particularly relates to an aqueous cutting fluid with excellent rust prevention and corrosion prevention properties and a preparation method thereof, which is applicable to fields such as metal processing and mechanical lubrication. Background Art

[0002] In modern industrial production, metal processing is a crucial link, especially in fields such as mechanical manufacturing, automotive industry, and aerospace. Cutting fluids play a role in reducing friction, reducing wear, improving processing efficiency, and extending the service life of equipment during metal processing. However, traditional cutting fluids have the following problems:

[0003] Many commonly used cutting fluids are prone to forming an oxide film after contacting the metal surface, resulting in rust on the metal surface and affecting the quality and service life of the processed parts. During the processing, a large amount of foam may be generated by the cutting fluid, leading to a decline in the cooling effect, and further affecting the processing accuracy and surface quality. Traditional cutting fluids are often difficult to clean completely after use, and the residues may affect subsequent processing or surface treatment. Many cutting fluids contain harmful components, which may pollute the environment after use and pose potential risks to the health of operators.

[0004] Therefore, developing a new type of cutting fluid that can effectively prevent rust and corrosion, has good defoaming and cleaning properties, and is environmentally friendly has important practical significance. Summary of the Invention

[0005] The purpose of the present invention is to provide an anti-rust, anti-corrosion and lubricating cutting fluid with excellent rust prevention and corrosion prevention properties, good defoaming properties and cleaning properties, which can effectively protect machine tools and processed parts during metal processing, and improve processing efficiency and product quality.

[0006] To achieve the above purpose, the present invention provides the following technical solution: A semi-synthetic cutting fluid for ferrous metals is composed of the following components in parts by weight:

[0007] Water: 10 parts;

[0008] Monoethanolamine: 8 parts;

[0009] Diethanolamine: 4 parts;

[0010] Boric acid: 4 parts;

[0011] Undecanedicarboxylic acid: 2 parts;

[0012] RL50 triacid: 1 part;

[0013] Benzotriazole: 0.2 parts;

[0014] Glycerol: 2 parts;

[0015] Naphthenic oil: 20 parts;

[0016] Tetrameric ricinoleate: 3 parts;

[0017] Tall oil: 3 parts;

[0018] Fatty alcohol polyoxyethylene ether: 3 parts;

[0019] Fatty alcohol polyoxyethylene ether carboxylic acid: 0.8 parts;

[0020] Phosphate ester: 0.5 parts;

[0021] Dodecanoic acid: 0.5 parts;

[0022] N,N'-Methylenebismorpholine: 3 parts;

[0023] Deionized water: 34.8 parts;

[0024] Three-dimensional siloxane defoamer: 0.2 parts.

[0025] The cutting fluid preparation method is as follows:

[0026] Step 1: Add water, monoethanolamine, diethanolamine, boric acid, undecanoic acid, RL50 tricarboxylic acid, and benzotriazole into the aqueous phase reactor in sequence, stir and circulate for 15 minutes. After confirming that it is uniform and transparent, add glycerol and stir evenly.

[0027] Step 2: Add naphthenic oil, tetrameric castor oil ester, tall oil, fatty alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether carboxylic acid, phosphate ester, docosahexacarboxylic acid, and N,N'-methylenebismorpholine into the oil phase reactor and stir for 15 minutes to confirm uniformity and transparency.

[0028] Step 3: Add the raw materials from the aqueous phase reactor to the oil phase reactor and stir for 10 minutes to ensure thorough mixing;

[0029] Step 4: Add deionized water into the reactor and stir for 10 minutes to ensure the homogeneity of the liquid;

[0030] Step 5: Add the three-dimensional siloxane defoamer, stir for 15 minutes, and take a sample for testing to ensure that the expected performance indicators are met.

[0031] In summary, the present invention has at least one of the following beneficial technical effects:

[0032] This invention possesses excellent rust and corrosion prevention properties, effectively preventing rust on machine tools and processed parts; it also exhibits comprehensive antibacterial properties, allowing the product to be used for extended periods with minimal spoilage and odor; it has good anti-foaming properties, preventing poor lubrication and cooling caused by foaming issues; it has excellent cleaning properties, enabling the product to fully perform; and it has superior lubrication properties, effectively protecting cutting tools during ferrous metal processing. Detailed Implementation

[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] This invention provides a technical solution: a semi-synthetic cutting fluid for ferrous metals, composed of the following components in parts by weight: water: 10 parts; monoethanolamine: 8 parts; diethanolamine: 4 parts; boric acid: 4 parts; undecanoic acid: 2 parts; RL50 tricarboxylic acid: 1 part; benzotriazole: 0.2 parts; glycerol: 2 parts; naphthenic oil: 20 parts; tetrameric castor oil ester: 3 parts; tall oil: 3 parts; fatty alcohol polyoxyethylene ether: 3 parts; fatty alcohol polyoxyethylene ether carboxylic acid: 0.8 parts; phosphate ester: 0.5 parts; docosahexadecanoic acid: 0.5 parts; N,N'-methylenebismorpholine: 3 parts; deionized water: 34.8 parts; three-dimensional siloxane defoamer: 0.2 parts.

[0035] The cutting fluid preparation method is as follows:

[0036] Step 1: Add water, monoethanolamine, diethanolamine, boric acid, undecanoic acid, RL50 tricarboxylic acid, and benzotriazole into the aqueous phase reactor in sequence, stir and circulate for 15 minutes. After confirming that it is uniform and transparent, add glycerol and stir evenly.

[0037] Step 2: Add naphthenic oil, tetrameric castor oil ester, tall oil, fatty alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether carboxylic acid, phosphate ester, docosahexacarboxylic acid, and N,N'-methylenebismorpholine into the oil phase reactor and stir for 15 minutes to confirm uniformity and transparency.

[0038] Step 3: Add the raw materials from the aqueous phase reactor to the oil phase reactor and stir for 10 minutes to ensure thorough mixing;

[0039] Step 4: Add deionized water into the reactor and stir for 10 minutes to ensure the homogeneity of the liquid;

[0040] Step 5: Add the three-dimensional siloxane defoamer, stir for 15 minutes, and take a sample for testing to ensure that the expected performance indicators are met.

[0041] The detection data in this embodiment is as follows:

[0042] Testing items Test Results Appearance Yellow transparent Storage stability It exhibits no stratification, no sedimentation, and is a homogeneous liquid. refraction 49.5 pH value 9.92 Transparency (5% & deionized water) transparent refractive index 1.67 pH (5% & deionized water) 9.53 Defoaming performance (5% & deionized water) 0 mL / 10 min Corrosion test (5% deionized water, 55±2℃) HT300 gray cast iron, 24h: Grade A Rust prevention for cast iron filings (2% & deionized water) Level 0 Rust prevention test (5% deionized water, 35±2℃) Single wafer, 24 hours, qualified; Stacked wafers, 4 hours, qualified.

[0043] Comparative example:

[0044] The selected water-based cutting fluid (model Molydal LUB 19) contains water, monoethanolamine, diethanolamine, a certain rust inhibitor, a certain defoamer, mineral oil, etc.

[0045] Testing items The liquid of this invention Commercial water-based cutting fluids Appearance Yellow transparent turbid Storage stability It exhibits no stratification, no sedimentation, and is a homogeneous liquid. Layering refraction 49.5 45.0 pH value 9.92 8.5 Defoaming performance (5% & deionized water) 0 mL / 10 min 10mL / 10min Corrosion test (5% deionized water, 55±2℃) Grade A Grade B Rust prevention test (5% deionized water, 35±2℃) Single wafer, 24 hours, qualified; Stacked wafers, 4 hours, qualified. Unqualified

[0046] Through comparative experiments, the cutting fluid of the present invention performed excellently in the rust prevention test, passing both single-piece and stacked-piece tests, while commonly available cutting fluids failed the rust prevention test, showing poor rust prevention performance.

[0047] The present invention has excellent defoaming performance, with no foam generated within 10 minutes, while commercially available cutting fluids generated 10 mL of foam under the same conditions, indicating that their defoaming performance is poor.

[0048] The cutting fluid of the present invention remains uniform and transparent during storage, without stratification or sedimentation, and exhibits good stability, while the control liquid showed stratification.

[0049] The cutting fluid of this invention has a better pH value and refractive index than commonly available liquids, indicating that it has better chemical stability and lubricity during use.

[0050] In summary, the rust-preventive and corrosion-resistant cutting fluid of this invention outperforms commonly available cutting fluids in all performance indicators and has better application prospects.

[0051] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A semi-synthetic cutting fluid for ferrous metals, characterized in that, Consists of the following components by weight parts: Water: 10 parts; Monoethanolamine: 8 parts; Diethanolamine: 4 parts; Boric acid: 4 parts; Undecanedioic acid: 2 parts; RL50 triacid: 1 part; Benzotriazole: 0.2 parts; Glycerol: 2 parts; Naphthenic oil: 20 parts; Tetramer castor oil ester: 3 parts; Tall oil: 3 parts; Fatty alcohol polyoxyethylene ether: 3 parts; Fatty alcohol polyoxyethylene ether carboxylic acid: 0.8 parts; Phosphate ester: 0.5 parts; Heneicosanedioic acid: 0.5 parts; N,N'-Methylene bis morpholine: 3 parts; Deionized water: 34.8 parts; Three-dimensional silicone defoamer: 0.2 parts.

2. A semi-synthetic cutting fluid for ferrous metals according to claim 1, characterized in that: The cutting fluid preparation method is as follows: Step one: Put water, monoethanolamine, diethanolamine, boric acid, undecanedioic acid, RL50 triacid, benzotriazole into the water phase kettle in turn, stir and circulate for 15 minutes, and then put glycerol after confirming uniform transparency, and stir uniformly; Step two: Put naphthenic oil, tetramer castor oil ester, tall oil, fatty alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether carboxylic acid, phosphate ester, heneicosanedioic acid, N,N'-methylene bis morpholine into the oil phase kettle, stir for 15 minutes to confirm uniform transparency; Step three: Put the raw materials in the water phase kettle into the oil phase kettle, and stir for 10 minutes; Step four: Put deionized water into the kettle, and stir for 10 minutes; Step five: Put three-dimensional silicone defoamer, and stir for 15 minutes.