Aerospace magnesium alloy cutting fluid

Abstract

The invention discloses an aerospace magnesium alloy cutting fluid, and belongs to the technical field of cutting fluid production, the aerospace magnesium alloy cutting fluid comprises 40-60% of mineral oil, 1-3% of inorganic base, 2-5% of branched alcohol ethoxylate, 5-10% of hard water resistant agent, 1-3% of antirust agent, 1-3% of corrosion inhibitor, 5-10% of bacteriostatic agent, and 20-25% of water; s2, adding water into the reaction kettle, and starting stirring; s3, adding the inorganic base and the antirust agent into the reaction kettle in sequence, and stirring for 20-30 minutes until the inorganic base and the antirust agent solid are completely dissolved; s4, adding the hard water resistant agent and the corrosion inhibitor into the reaction kettle, heating to 40-50 DEG C, and stirring for 20-30 minutes until the hard water resistant agent and the corrosion inhibitor are completely and uniformly dissolved; s5, adding mineral oil into the reaction kettle; propylene glycol phenyl ether is used for replacing a traditional bactericide (containing organic amine), corrosion of the working solution to magnesium alloy can be effectively reduced, fatty alcohol-polyoxyethylene ether phosphate is added in a compounded mode, magnesium ion precipitation is effectively inhibited, and the protection capacity to the magnesium alloy and the stability of the working solution are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of cutting fluid production, and in particular relates to an aerospace magnesium alloy cutting fluid. Background Art

[0002] At present, the major scientific and technological issues in the lightweight development of high-performance aerospace equipment are design, which is the first step to achieve lightweight. Magnesium alloys can bring huge weight reduction benefits and significantly improve the combat performance of aircraft. Their application in the aerospace field is of great significance and has good application potential. The characteristics of magnesium alloys in the aerospace field are: 1. Low density; 2. Stiffness and thermal conductivity; 3. Vibration reduction ability. Magnesium alloys also have high specific strength, radiation protection, good dimensional stability, and electromagnetic shielding, which can resist the "bombardment" of short-wave radiation and high-energy particles.

[0003] However, magnesium has an active chemical property, which results in poor corrosion resistance of magnesium alloys. It is easy to oxidize and discolor during processing, and the accumulation of chips and corrosion produces hydrogen, which poses safety hazards such as explosion. Compared with traditional non-ferrous metal cutting fluids, the cutting fluid used in magnesium alloy processing has very stringent requirements on corrosion inhibition and suppression of magnesium ion precipitation in addition to the traditional basic performance requirements such as cooling, lubrication, and chip removal. In the aerospace field, due to the ultra-high reliability requirements of its structural parts, the corresponding requirements for the performance of cutting fluids during the processing are extremely stringent. For this reason, we propose an aerospace magnesium alloy cutting fluid. Summary of the invention The present invention provides an aerospace magnesium alloy cutting fluid to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: an aerospace magnesium alloy cutting fluid, comprising the following steps: S1, mineral oil 40-60%, inorganic base 1-3%, branched alcohol ethoxylate 2-5%, anti-hard water agent 5-10%, rust inhibitor 1-3%, corrosion inhibitor 1-3%, antibacterial agent 5-10%, water 20%-25%; S2, adding water into the reactor and starting stirring; S3, adding the inorganic base and the rust inhibitor into the reaction kettle in turn, stirring for 20min-30min until the inorganic base and the rust inhibitor solids are completely dissolved; S4. Add the anti-hardness agent and corrosion inhibitor into the reaction kettle, heat to 40°C-50°C, and stir for 20min-30min until the anti-hardness agent and corrosion inhibitor are completely dissolved; S5. Firstly, add mineral oil into the reactor, and then add branched alcohol ethoxylate and antibacterial agent into the reactor in sequence, and stir for 20-30 minutes until the liquid in the reactor is completely clear.

[0005] Furthermore, the mineral oil is paraffin-based and naphthenic mineral oil, but not limited to one or a mixture of multiple ones.

[0006] Furthermore, the inorganic base is sodium hydroxide, potassium hydroxide and sodium metasilicate but not limited to one or a mixture of multiple kinds.

[0007] Furthermore, the branched alcohol ethoxylate is a C12-18 fatty alcohol polyoxyethylene ether and is not limited to one or a mixture of multiple types.

[0008] Furthermore, the anti-hard water agent is a polyisobutylene succinic anhydride derivative and oleyl alcohol ether carboxylic acid, but not limited to one or a mixture of multiple types.

[0009] Furthermore, the rust inhibitor is neodecanoic acid, sebacic acid, dodecanedioic acid and triazine polycarboxylic acid, but not limited to one or a mixture of multiple ones.

[0010] Furthermore, the corrosion inhibitor is fatty alcohol polyoxyethylene ether phosphate and siloxane ketone, but not limited to one or a mixture of multiple types.

[0011] Furthermore, the antibacterial agent is ethylene glycol phenyl ether and propylene glycol phenyl ether, but not limited to one or a mixture of multiple types.

[0012] Further, in step S5, after adding the mineral oil to the reaction, stirring is performed for 15 min-20 min to completely blend the mineral oil with the liquid in the reaction, and then the branched alcohol ethoxylate and the antibacterial agent are sequentially added to the reactor, and when the branched alcohol ethoxylate and the antibacterial agent are sequentially added to the reactor, the stirring speed is slowly increased to 800 r / s-1000 r / s, and stirred for 25 min-30 min until the liquid in the reactor is completely clarified.

[0013] The beneficial effects of the present invention are: Polyisobutylene succinic anhydride derivatives with stable performance, less foam and good hard water resistance are used. However, the disadvantage of polyisobutylene succinic anhydride derivatives is that their emulsification ability is slightly worse than that of traditional anionic surfactants such as sodium petroleum sulfonate. Because the carbon type distribution of polyisobutylene succinic anhydride derivatives is narrow and there is no benzene ring in the structure, the emulsification ability of base oil and additives is insufficient. In addition, the emulsification ability is improved by adding branched alcohol polyoxyethylene ether, which effectively improves the stability of the working fluid and its resistance to magnesium ion hardness. At the same time, inorganic bases are used instead of organic amines, and propylene glycol phenyl ether is used instead of traditional fungicides (containing organic amines), which can effectively reduce the corrosion of the working fluid to magnesium alloys. The compound addition of fatty alcohol polyoxyethylene ether phosphate can effectively inhibit the precipitation of magnesium ions, improve the protection of magnesium alloys and the stability of the working fluid. DETAILED DESCRIPTION

[0014] In order to further understand the content, features and effects of the present invention, the following embodiments are listed.

[0015] Embodiment 1: An aerospace magnesium alloy cutting fluid comprises the following steps; S1, the proportion of cyclohexane oil is 56%, which, as a basic component, can provide certain lubrication properties for the cutting fluid and help reduce friction in the cutting process of aerospace magnesium alloys; The proportion of sodium hydroxide is 1%, and sodium hydroxide may play a role in adjusting the pH value in the whole system to meet the special requirements of magnesium alloy cutting; Branched carbon 13 alcohol polyoxyethylene ether accounts for 2%. With its unique chemical structure, this substance can play the role of emulsification and dispersion in the cutting fluid system, which helps other ingredients to better integrate and play their role; Polyisobutylene succinic anhydride derivatives account for 8%, which may participate in the film-forming process of the cutting fluid, forming a protective film on the surface of the magnesium alloy to prevent corrosion and wear during the cutting process; Oleyl ether carboxylic acid accounts for 1% and neodecanoic acid accounts for 2%, which may play a role in auxiliary rust prevention, lubrication or adjustment of the overall performance of the cutting fluid; C13 alcohol polyoxyethylene ether phosphate accounts for 1%. Its special phosphate structure helps to improve the anti-wear performance and extreme pressure performance of the cutting fluid, while inhibiting the precipitation of magnesium ions and the occurrence of magnesium corrosion; Propylene glycol phenyl ether accounts for 6%, which can improve the solubility, stability and antibacterial effect of the cutting fluid. Water is the balance. Water, as a solvent, provides a medium environment for the mixing and reaction of other ingredients. S2. Add 23% water into the reactor. When adding water into the reactor, the reactor needs to be cleaned and dried in advance, and then start stirring at a speed of 300-500r / s; S3. Add 1% sodium hydroxide and 2% neodecanoic acid into the reactor in sequence and stir for 30 minutes until the 1% sodium hydroxide and 2% neodecanoic acid are completely dissolved. During the stirring process, if solid particles are found to be attached to the reactor wall or the stirring paddle, the stirring angle can be adjusted or the fluctuation range of the stirring speed can be increased. The stirring speed can be increased to between 300-500 r / s to promote the complete dissolution of the solid. S4, 8% polyisobutylene succinic anhydride derivative, 1% oleyl alcohol ether carboxylic acid and 1% C13 alcohol polyoxyethylene ether phosphate are added into a reaction kettle, heated to 50°C, and stirred for 30 minutes until 8% polyisobutylene succinic anhydride derivative, 1% oleyl alcohol ether carboxylic acid and 1% C13 alcohol polyoxyethylene ether phosphate are completely dissolved; S5. After adding 56% cyclohexane oil into the reaction, stir for 20 minutes, and adjust the stirring speed to 600-800 r / s to allow the mineral oil to completely blend with the liquid in the reaction. Then, add the branched alcohol ethoxylate and the antibacterial agent into the reaction kettle in turn, and when 2% branched carbon 13 alcohol polyoxyethylene ether (branched alcohol ethoxylate) and 6% propylene glycol phenyl ether are added into the reaction kettle in turn, slowly increase the stirring speed to 1000 r / s, and stir for 30 minutes until the liquid in the reaction kettle is completely clarified.

[0016] Embodiment 2: S1, the proportion of paraffin oil is 51%, which, as a basic component, can provide certain lubrication properties for the cutting fluid and help reduce friction during the cutting process of aerospace magnesium alloys; The proportion of potassium hydroxide is 1.5%, and sodium hydroxide may play a role in adjusting the pH value in the whole system to meet the special requirements of magnesium alloy cutting; Branched carbon 13 alcohol polyoxyethylene ether accounts for 3%. With its unique chemical structure, this substance can play the role of emulsification and dispersion in the cutting fluid system, which helps other ingredients to better integrate and play their role; Polyisobutylene succinic anhydride derivatives account for 7%, which may participate in the film-forming process of the cutting fluid, forming a protective film on the surface of the magnesium alloy to prevent corrosion and wear during the cutting process; Oleyl ether carboxylic acid accounts for 2%, and neodecanoic acid accounts for 2%. They may play a role in assisting rust prevention, lubrication, or regulating the overall performance of the cutting fluid in the cutting fluid; C12-14 alcohol polyoxyethylene ether phosphate accounts for 1.5%. Its special phosphate structure helps to improve the anti-wear performance and extreme pressure performance of the cutting fluid, while inhibiting the precipitation of magnesium ions and the occurrence of magnesium corrosion; Propylene glycol phenyl ether accounts for 3% and 5% ethylene glycol phenyl ether, which can improve the solubility, stability and antibacterial effect of the cutting fluid; Water is the balance, and water acts as a solvent, providing a medium environment for the mixing and reaction of other components; S2. Add 24% water into the reactor. When adding water into the reactor, the reactor needs to be cleaned and dried in advance, and then start stirring at a speed of 300-500 r / s; S3. Add 1.5% potassium hydroxide and 2% sebacic acid into the reactor in sequence and stir for 30 minutes until the 1.5% potassium hydroxide and 2% sebacic acid are completely dissolved. During the stirring process, solid particles are found to be attached to the reactor wall or the stirring paddle. The stirring angle can be adjusted or the fluctuation range of the stirring speed can be increased. The stirring speed is increased to between 300-500 r / s to promote the complete dissolution of the solid. S4, add 7% polyisobutylene succinic anhydride derivative, 2% oleyl alcohol ether carboxylic acid, and 1.5% C12-14 alcohol polyoxyethylene ether phosphate into a reaction kettle, heat to 50°C, and stir for 30 minutes until 7% polyisobutylene succinic anhydride derivative, 2% oleyl alcohol ether carboxylic acid, and 1.5% C12-14 alcohol polyoxyethylene ether phosphate are completely dissolved; S5. After adding 51% paraffin oil to the reactor, stir for 20 minutes, and adjust the stirring speed to 600-800 r / s to allow the 51% paraffin oil to completely blend with the liquid in the reaction. Subsequently, 3% branched carbon 13 alcohol polyoxyethylene ether, 3% propylene glycol phenyl ether and 5% ethylene glycol phenyl ether are added to the reactor in sequence. When 3% branched carbon 13 alcohol polyoxyethylene ether, 3% propylene glycol phenyl ether and 5% ethylene glycol phenyl ether are added to the reactor in sequence, the stirring speed is slowly increased to 1000 r / s, and stirred for 30 minutes until the liquid in the reactor is completely clarified.

[0017] Table 1 Aerospace magnesium alloy cutting fluids of Examples 1 and 2

[0018] The embodiments are superior to commercially available products in terms of non-ferrous metal and ferrous metal protection and corrosion resistance, defoaming performance, anti-magnesium stability, and lubrication performance. In this technical solution: By using polyisobutylene succinic anhydride derivatives, it has stable performance, less foam and good hard water resistance, and adding branched alcohol polyoxyethylene ether to improve emulsification ability, effectively improving the stability of the working fluid and its ability to resist magnesium ion hardness; At the same time, using inorganic bases to replace organic amines and using propylene glycol phenyl ether to replace traditional fungicides (containing organic amines) can effectively reduce the corrosion of working fluids to magnesium alloys; Adding fatty alcohol polyoxyethylene ether phosphate can effectively inhibit the precipitation of magnesium ions, improve the protection ability of magnesium alloy and the stability of the working fluid.

[0019] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An aerospace magnesium alloy cutting fluid, characterized by: The following steps are involved: S1, mineral oil 40-60%, inorganic base 1-3%, branched alcohol ethoxylate 2-5%, anti-hard water agent 5-10%, rust inhibitor 1-3%, corrosion inhibitor 1-3%, antibacterial agent 5-10%, water 20%-25%; S2, adding water into the reactor and starting stirring; S3, adding the inorganic base and the rust inhibitor into the reaction kettle in sequence, stirring for 20min-30min until the inorganic base and the rust inhibitor solids are completely dissolved; S4. Add the anti-hard water agent and the corrosion inhibitor into the reaction kettle, heat to 40°C-50°C, and stir for 20min-30min until the anti-hard water agent and the corrosion inhibitor are completely dissolved; S5. Firstly, add mineral oil into the reactor, and then add branched alcohol ethoxylate and antibacterial agent into the reactor in sequence, and stir for 20-30 minutes until the liquid in the reactor is completely clear.

2. The aerospace magnesium alloy cutting fluid according to claim 1, characterized in that: The mineral oil is paraffin-based and naphthenic mineral oil, but is not limited to one or a mixture of multiple ones.

3. The aerospace magnesium alloy cutting fluid according to claim 1, characterized in that: The inorganic base is sodium hydroxide, potassium hydroxide and sodium metasilicate, but not limited to one or a mixture of multiple types.

4. The aerospace magnesium alloy cutting fluid according to claim 1, characterized in that: The branched alcohol ethoxylate is a C12-18 fatty alcohol polyoxyethylene ether and is not limited to one or a mixture of multiple types.

5. The aerospace magnesium alloy cutting fluid according to claim 1, characterized in that: The anti-hard water agent is a polyisobutylene succinic anhydride derivative and oleyl alcohol ether carboxylic acid, but not limited to one or a mixture of multiple types.

6. The aerospace magnesium alloy cutting fluid according to claim 1, characterized in that: The rust inhibitor is neodecanoic acid, sebacic acid, dodecanedioic acid and triazine polycarboxylic acid, but not limited to one or a mixture of multiple types.

7. The aerospace magnesium alloy cutting fluid according to claim 1, characterized in that: The corrosion inhibitor is fatty alcohol polyoxyethylene ether phosphate and silicone ketone, but not limited to one or a mixture of multiple types.

8. The aerospace magnesium alloy cutting fluid according to claim 1, characterized in that: The antibacterial agent is ethylene glycol phenyl ether and propylene glycol phenyl ether, but not limited to one or a mixture of multiple types.

9. The aerospace magnesium alloy cutting fluid according to claim 1, characterized in that: In step S5, after adding the mineral oil into the reaction, stirring is performed for 15 min-20 min to completely blend the mineral oil with the liquid in the reaction, and then the branched alcohol ethoxylate and the antibacterial agent are sequentially added into the reaction kettle. When the branched alcohol ethoxylate and the antibacterial agent are sequentially added into the reaction kettle, the stirring speed is slowly increased to 800 r / s-1000 r / s, and stirring is performed for 25 min-30 min until the liquid in the reaction kettle is completely clarified.

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