CN108048164B - Method for improving tribological performance of internal combustion engine by surface coating and nano lubricant - Google Patents
Method for improving tribological performance of internal combustion engine by surface coating and nano lubricant Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M141/00—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential
- C10M141/08—Lubricating compositions characterised by the additive being a mixture of two or more compounds covered by more than one of the main groups C10M125/00 - C10M139/00, each of these compounds being essential at least one of them being an organic sulfur-, selenium- or tellurium-containing compound
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/02—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using non-aqueous solutions
- C23C22/03—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using non-aqueous solutions containing phosphorus compounds
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/06—Metal compounds
- C10M2201/062—Oxides; Hydroxides; Carbonates or bicarbonates
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2201/00—Inorganic compounds or elements as ingredients in lubricant compositions
- C10M2201/06—Metal compounds
- C10M2201/065—Sulfides; Selenides; Tellurides
- C10M2201/066—Molybdenum sulfide
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/028—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms
- C10M2205/0285—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers containing aliphatic monomers having more than four carbon atoms used as base material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/287—Partial esters
- C10M2207/289—Partial esters containing free hydroxy groups
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2030/00—Specified physical or chemical properties which is improved by the additive characterising the lubricating composition, e.g. multifunctional additives
- C10N2030/06—Oiliness; Film-strength; Anti-wear; Resistance to extreme pressure
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/25—Internal-combustion engines
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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Lubricants (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention discloses a method for improving the tribological performance of an internal combustion engine through the synergistic effect of a surface coating and a nano lubricant, wherein the surface coating is a nickel-plated layer containing nano titanium nitride and nano Fe3O4@MoS2For the lubricant to be dispersed in the PAO6 oil, the surface coating is used after being soaked in the oil. The method has the advantages of good antifriction, antiwear and lubricating effects, low coating internal stress and good substrate bonding strength, can keep good lubricating effect even in a spent oil state, and can obviously improve the tribological performance of the internal combustion engine.
Description
One, the technical field
The invention relates to the field of surface coatings, in particular to a method for improving the tribological performance of an internal combustion engine by the cooperation of a surface coating and a nano lubricant.
Second, background Art
The internal combustion engine is a main power device of various automobiles, agricultural machinery, engineering machinery, ships and naval vessels and the like at present, and the holding capacity of the internal combustion engine is high in ranking among various power machines, so the internal combustion engine occupies an important position. At present, the internal combustion engine mainly generates power by burning fossil energy, wherein about 30 percent of energy is consumed in the friction and abrasion process of various friction pairs in the operation process of the internal combustion engine. How to improve the tribological performance of the internal combustion engine has important economic and social significance for improving the efficiency of the internal combustion engine, realizing energy conservation and emission reduction and maintaining human sustainable development.
In recent years, there have been some reports on methods for improving the tribological properties of internal combustion engines. Chinese patent (application number: 201280027403.4) discloses a wear-resistant coating of a piston ring of an internal combustion engine, which consists of 15-25% of iron, 10-25% of tungsten carbide, 30-40% of chromium, 10-25% of nickel, 10-25% of molybdenum, 1-10% of carbon and 0.1-2% of silicon, and the wear resistance of the piston ring is obviously improved. Chinese patent application No. 201680001687.8 discloses a lubricating oil composition and a method for reducing friction in an internal combustion engine, the composition comprising a lubricating oil base oil, a molybdenum-based compound, a metal-based detergent, and an ester compound having 1 or more hydroxyl groups in the molecule, achieving a good lubricating effect even in a low-temperature environment. Chinese patent (application number: 201710295773.0) discloses a rare earth lubricating oil and a preparation method thereof, wherein polymethyl methacrylate is coated with yttrium oxide/lanthanum oxide nanoparticles with a specific proportion, so that the problem of dispersion of the nanoparticles in base oil is solved, the abrasion of machine parts is reduced, the oil consumption is reduced, and the service life of an engine is prolonged. Although the tribological performance of internal combustion engines can be improved by means of suitable surface coatings or by adding appropriate lubricating oil additives, there is no guiding specification for the combined use of surface coatings and lubricating oil compositions due to the complexity of the preparation process, and thus there are few reports on the synergistic enhancement of the tribological performance of internal combustion engines by surface coatings and lubricating oil additives.
Third, the invention
The invention aims to provide a method for improving the tribological performance of an internal combustion engine by the cooperation of a surface coating and a nano lubricant, aiming at the current situation of the surface coating of a friction pair of the internal combustion engine and a lubricating oil additive.
The invention is realized by the following technical scheme:
a method for improving the tribological performance of an internal combustion engine by the cooperation of a surface coating and a nano lubricant specifically comprises the following steps:
(1) degreasing and derusting the piston ring of the internal combustion engine, grinding and polishing the friction surface until the surface roughness Ra is 0.3-1.5 mu m, placing the piston ring in plating solution, plating for 0.5-2h at the temperature of 80-95 ℃, and then washing and drying the piston ring to obtain a surface coating piston ring;
(2) taking 0.001-1g of nano Fe3O4@MoS2Adding 5-8mL of span 80, performing ultrasonic dispersion for 5-10min, adding 100mL of PAO6 oil, and performing ultrasonic stirring for 20-40min to obtain oil containing nano lubricant;
(3) heating the oil containing the nano lubricant to 50-70 ℃, adding the surface coating piston ring prepared in the step (1), preserving heat for 2-4h, and taking out to obtain an oil-impregnated surface coating piston ring;
(4) the oil-impregnated surface coating piston ring is matched with a corresponding cylinder sleeve of the internal combustion engine, and is lubricated by the oil containing the nano lubricant prepared in the step (2) under the conditions of 50-300N load and 0.5-2m/s speed of reciprocating friction, so that the friction coefficient and the wear rate of a friction pair can be obviously reduced, and the effect of synergistically improving the tribological performance of the internal combustion engine is achieved;
the plating solution consists of 30-80g/L of sodium hypophosphite, 20-30g/L of nickel sulfate, 15-30mL/L of lactic acid, 4-10mL/L of propionic acid, 0.1-1g/L of nano titanium nitride and 1-4g/L of polyethylene glycol, and the pH is adjusted to 4.4-4.6, wherein the particle size of the nano titanium nitride is 20-60 nm.
The nano Fe3O4@MoS2The preparation method comprises the following steps: dissolving 1.4-5.6g of sodium molybdate and 2.3-4.6g of thiourea in 30mL of deionized water, and adding 60-120mg of Fe with the particle size of 20-200nm3O4And carrying out ultrasonic dispersion for 20-60min, then reacting the solution at 180-200 ℃ for 8-10h, then carrying out magnetic separation on the obtained precipitate, respectively washing the precipitate with deionized water and ethanol in sequence, and carrying out vacuum drying at 50-60 ℃ for 12-14h to obtain the product.
Compared with the prior art, the invention has the advantages that:
1) compared with the method of a single surface coating or a single nano lubricant, the method can obviously reduce the friction coefficient and the wear rate between the typical friction pair cylinder sleeve and the piston ring of the internal combustion engine, and has the effect of adding 1 to more than 2, namely the surface coating and the nano lubricant have the effect of synergistically improving the tribological performance of the internal combustion engine.
2) The surface coating of the invention has low internal stress and strong binding force with a substrate, and the pores of the coating are infiltrated with the oil containing the nano lubricant, thereby still playing a good role in friction reduction and wear resistance even in a spent oil lubrication state.
3) The method is simple and convenient, easy to implement, low in cost, beneficial to improving the fuel efficiency of the internal combustion engine, reducing the energy consumption and easy to popularize.
Fourth, specific embodiments
The plating bath composition used in the following examples: 30g/L of sodium hypophosphite, 28g/L of nickel sulfate, 16mL/L of lactic acid, 9mL/L of propionic acid, 0.5g/L of nano titanium nitride with the particle size of 20-60nm and 1.5g/L of polyethylene glycol, adjusting the pH value to 4.4-4.6,and (5) standby. The nano Fe3O4@MoS2The preparation method comprises the following steps: dissolving 1.4g of sodium molybdate and 2.3g of thiourea in 30mL of deionized water, and adding 60mg of Fe with the particle size of 80-200nm3O4And ultrasonically dispersing for 30min, then reacting the solution at 200 ℃ for 10h, then carrying out magnetic separation on the obtained precipitate, sequentially washing the precipitate with deionized water and ethanol respectively, and carrying out vacuum drying at 60 ℃ for 12h to obtain the nano-silver-doped zinc oxide.
Example 1:
(1) degreasing and derusting the piston ring of the internal combustion engine, grinding and polishing the friction surface until the surface roughness Ra is 0.8 mu m, placing the piston ring in plating solution, plating for 2 hours at 82-84 ℃, then washing and drying to obtain a surface coating piston ring;
(2) 0.05g of nano Fe is taken3O4@MoS2Adding 5mL of span 80, performing ultrasonic dispersion for 6min, adding 100mL of PAO6 oil, and performing ultrasonic stirring for 25min to obtain oil containing the nano lubricant;
(3) heating the oil containing the nano lubricant to 50-52 ℃, adding the surface coating piston ring prepared in the step (1), preserving heat for 3.5 hours, and taking out to obtain an oil-impregnated surface coating piston ring;
(4) and (3) matching the oil-impregnated surface coating piston ring with a corresponding cylinder sleeve of the internal combustion engine, and lubricating for 6 hours by adopting the oil containing the nano lubricant prepared in the step (2) under the conditions of load of 60N and reciprocating friction at the speed of 0.8 m/s.
The test result shows that the average friction coefficient and the wear rate of the friction pair respectively reach 0.05 and 3.2 mu m3in/Nm. Under the same friction condition, the average friction coefficient and the wear rate of a friction pair respectively reach 0.12 and 8.9 mu m when a single surface coating sample is adopted3(iv)/Nm; when a single nano lubricant sample is adopted, the average friction coefficient and the wear rate of a friction pair respectively reach 0.09 and 5.6 mu m3/Nm。
Example 2:
(1) degreasing and derusting the piston ring of the internal combustion engine, grinding and polishing the friction surface until the surface roughness Ra is 1.5 mu m, placing the piston ring in plating solution, plating for 1.5h at the temperature of 92-95 ℃, then washing and drying to obtain a surface coating piston ring;
(2) 0.5g of nano Fe is taken3O4@MoS2Adding 8mL span80, performing ultrasonic dispersion for 10min, then adding 100mL of PAO6 oil, and performing ultrasonic stirring for 30min to obtain oil containing the nano lubricant;
(3) heating the oil containing the nano lubricant to 65-68 ℃, adding the surface coating piston ring prepared in the step (1), preserving heat for 3 hours, and taking out to obtain an oil-immersed surface coating piston ring;
(4) and (3) matching the oil-impregnated surface coating piston ring with a corresponding cylinder sleeve of the internal combustion engine, lubricating for 5 hours by adopting the oil containing the nano lubricant prepared in the step (2) under the conditions of load of 300N and reciprocating friction at the speed of 1.6m/s, and then lubricating for 1 hour by using the oil.
The test result shows that the average friction coefficient and the wear rate of the friction pair respectively reach 0.08 and 6.3 mu m3in/Nm. Under the same friction condition, the average friction coefficient and the wear rate of a friction pair respectively reach 0.19 and 15.5 mu m when a single surface coating sample is adopted3(iv)/Nm; when a single nano lubricant sample is adopted, the average friction coefficient and the wear rate of a friction pair respectively reach 0.14 and 18.7 mu m3/Nm。
According to the experimental results of the above examples, the surface coating and the nano lubricant synergistic method of the invention can significantly improve the tribological performance of the internal combustion engine.
Claims (1)
1. A method for improving the tribological performance of an internal combustion engine by the cooperation of a surface coating and a nano lubricant is characterized by comprising the following steps:
(1) degreasing and derusting the piston ring of the internal combustion engine, grinding and polishing the friction surface until the surface roughness Ra is 0.3-1.5 mu m, placing the piston ring in plating solution, plating for 0.5-2h at the temperature of 80-95 ℃, and then washing and drying the piston ring to obtain a surface coating piston ring;
(2) taking 0.001-1g of nano Fe3O4@MoS2Adding 5-8mL of span 80, performing ultrasonic dispersion for 5-10min, adding into 100mL of PAO6 oil, and performing ultrasonic stirring for 20-40min to obtain oil containing nano lubricant;
(3) heating the oil containing the nano lubricant to 50-70 ℃, adding the surface coating piston ring prepared in the step (1), preserving heat for 2-4h, and taking out to obtain an oil-impregnated surface coating piston ring;
(4) the oil-impregnated surface coating piston ring is matched with a corresponding cylinder sleeve of the internal combustion engine, and is lubricated by the oil containing the nano lubricant prepared in the step (2) under the conditions of 50-300N load and 0.5-2m/s speed of reciprocating friction, so that the friction coefficient and the wear rate of a friction pair can be obviously reduced, and the effect of synergistically improving the tribological performance of the internal combustion engine is achieved;
wherein the plating solution in the step (1) consists of 30-80g/L of sodium hypophosphite, 20-30g/L of nickel sulfate, 15-30mL/L of lactic acid, 4-10mL/L of propionic acid, 0.1-1g/L of nano titanium nitride with the particle size of 20-60nm and 1-4g/L of polyethylene glycol, and the pH value is adjusted to 4.4-4.6;
the nano Fe in the step (2)3O4@MoS2The preparation method comprises the following steps: dissolving 1.4-5.6g of sodium molybdate and 2.3-4.6g of thiourea in 30mL of deionized water, and adding 60-120mg of Fe with the particle size of 20-200nm3O4And carrying out ultrasonic dispersion for 20-60min, then reacting the solution at 180-200 ℃ for 8-10h, then carrying out magnetic separation on the obtained precipitate, respectively washing the precipitate with deionized water and ethanol in sequence, and carrying out vacuum drying at 50-60 ℃ for 12-14h to obtain the product.
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| CN101021013B (en) * | 2007-03-21 | 2010-12-08 | 浙江工业大学 | Process of preparing nanometer antiwear composite coating on surface of metal base |
| WO2011003116A2 (en) * | 2009-07-03 | 2011-01-06 | Enthone Inc. | Beta-amino acid comprising electrolyte and method for the deposition of a metal layer |
| CN102703943B (en) * | 2012-05-23 | 2016-04-13 | 江苏仪征金派内燃机配件有限公司 | A kind of production method of nanocomposite surface piston ring |
| CN103451636B (en) * | 2013-06-24 | 2015-12-23 | 江苏盈科汽车空调有限公司 | A kind of nickel-phosphorus alloy chemical plating fluid for air-conditioning compressor swashplate high abrasion |
| CN103510080A (en) * | 2013-10-14 | 2014-01-15 | 国家电网公司 | Surface treatment method of cold-work die steel |
| CN104047834B (en) * | 2014-07-03 | 2016-08-24 | 肇庆匹思通机械有限公司 | A kind of piston ring for air-conditioning rolling piston compressor and preparation method thereof |
| CN104264133B (en) * | 2014-09-26 | 2017-04-12 | 合肥工业大学 | Piston ring friction surface costing for internal combustion engine facing to bio-oil application and preparation method of piston ring friction surface costing for internal combustion engine |
| CN105087105B (en) * | 2015-09-11 | 2017-06-23 | 合肥工业大学 | Nano molybdenum disulfide ferrofluid lubricant and preparation method thereof |
| CN107033590B (en) * | 2017-03-24 | 2019-02-19 | 西北工业大学 | A kind of composite wave-suction material and preparation method by three-step reaction preparation |
| CN107190250A (en) * | 2017-05-24 | 2017-09-22 | 李华平 | The nano chemical composite plating liquid and its application method of a kind of plated state high-hardness, wearable |
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