阅读说明：本技术 金属复合结构用异金属连接件防腐润滑涂料 (Anticorrosive lubricating coating for dissimilar metal connecting piece for metal composite structure ) 是由 殷跃军 张亮 杨宏强 韩长智 于 2018-07-05 设计创作，主要内容包括：本发明涉及金属复合结构用异金属连接件防腐润滑涂料。各物料组分及组分重量份数为：二硫化钼2000～4000份,铬酸锶0～180份,耐热酚醛树脂2000～6000份,乙二醇乙醚醋酸酯4000～5000份,聚四氟乙烯0～200份,膨润土30～50份,聚酰胺蜡液变助剂100～150份,流平助剂10～30份。本发明所提供的金属复合结构用异金属连接件防腐润滑涂料,其适用于铝合金、钛合金等金属复合结构用异金属连接件表面防腐处理,具备耐高温性能、抵抗脱漆剂性能和自润滑性能。(The invention relates to an anti-corrosion lubricating coating for a dissimilar metal connecting piece for a metal composite structure. The material components and the parts by weight of the components are as follows: 2000-4000 parts of molybdenum disulfide, 0-180 parts of strontium chromate, 2000-6000 parts of heat-resistant phenolic resin, 4000-5000 parts of ethylene glycol ethyl ether acetate, 0-200 parts of polytetrafluoroethylene, 30-50 parts of bentonite, 100-150 parts of polyamide wax liquid modifier and 10-30 parts of leveling additive. The anticorrosive lubricating coating for the dissimilar metal connecting piece for the metal composite structure is suitable for surface anticorrosive treatment of dissimilar metal connecting pieces for metal composite structures such as aluminum alloy, titanium alloy and the like, and has high temperature resistance, paint remover resistance and self-lubricating property.)

1. The corrosion-resistant lubricating coating for the dissimilar metal connecting piece for the metal composite structure is characterized by comprising the following material components in parts by weight: 2000-4000 parts of molybdenum disulfide, 0-180 parts of strontium chromate, 2000-6000 parts of heat-resistant phenolic resin, 4000-5000 parts of ethylene glycol ethyl ether acetate, 0-200 parts of polytetrafluoroethylene, 30-50 parts of bentonite, 100-150 parts of polyamide wax liquid modifier and 10-30 parts of leveling additive.

2. The dissimilar metal connecting member anticorrosive lubricating coating for the metal composite structure according to claim 1, wherein the molybdenum disulfide is 1000-mesh powder molybdenum disulfide.

3. The corrosion-resistant lubricating coating for the dissimilar metal connecting member for the metal composite structure according to claim 1, wherein the strontium chromate is industrial pigment-grade strontium chromate powder with fineness of not less than 600 meshes.

4. The corrosion-resistant lubricating coating for a dissimilar metal connecting member for a metal composite structure according to claim 1, wherein the heat-resistant phenolic resin is a No. ii heat-resistant phenolic resin, a 284 phenolic resin or a 881 phenolic resin.

5. The corrosion-resistant lubricating coating for the dissimilar metal connecting piece for the metal composite structure as claimed in claim 1, wherein the ethylene glycol monoethyl ether acetate is industrial-grade CAC111-15-9 ethylene glycol monoethyl ether acetate.

6. The corrosion-resistant lubricating coating for the dissimilar metal connecting member for the metal composite structure according to claim 1, wherein the polytetrafluoroethylene is LUB5 polytetrafluoroethylene.

7. The corrosion-resistant lubricating coating for the dissimilar metal connecting member for the metal composite structure according to claim 1, wherein the bentonite is MP100 organic bentonite.

8. The corrosion-resistant lubricating coating for the dissimilar metal connecting member for the metal composite structure according to claim 1, wherein the polyamide wax liquid transformation aid is 229 wax liquid transformation aid or polyethylene wax liquid transformation aid.

9. The dissimilar metal connector anticorrosive lubricating coating for metal composite structures according to claim 1, wherein the leveling aid is a 3270 leveling agent or a HX-3310 leveling agent.

Technical Field

The invention relates to the technical field of anticorrosive lubricating coatings, in particular to an anticorrosive lubricating coating for a dissimilar metal connecting piece for a metal composite structure.

Background

The fastener made of stainless steel, aluminum alloy and titanium alloy materials has the excellent comprehensive properties of large specific strength, fatigue resistance, corrosion resistance and the like, and is widely applied to connecting pieces of high-end metal structures in the fields of aviation, rail transportation and the like, such as a high-alloying alloy steel composite structure of a magnetic suspension rail system. The anticorrosive paint for stainless steel, aluminum alloy and titanium alloy fasteners, which is resistant to galvanic corrosion, has special requirements on the assembly process in many fields. The connecting pieces such as fasteners and the like for the aviation industry realize mechanical assembly, and can still be disassembled without generating an aging locking phenomenon after being used for a long time, so that the coated connecting pieces are required to have good lubricating property for a long time.

The invention mainly solves the problems of galvanic corrosion prevention between dissimilar metals and maintenance of good long-term lubricating performance of stainless steel, aluminum alloy and titanium alloy connecting pieces, such as titanium alloy fasteners, titanium alloy rivets and the like, for composite structures of aluminum alloy, nickel alloy, high-alloying alloy steel and the like under the working condition of connecting the composite structures of aluminum alloy, nickel-based alloy, high-alloying alloy steel and the like.

The locking phenomenon of the fastener often occurs on fasteners made of stainless steel, aluminum alloy and titanium alloy materials, and the metal alloys have corrosion resistance and can generate a thin oxidation layer on the surface of the metal to prevent further corrosion when the surface is damaged. When the fastener is locked, the oxide layer is damaged by the pressure and heat generated between the threads, so that the metal threads are blocked or sheared, and then adhesion occurs. When this continues, the fastener will be completely locked and cannot be disassembled.

When stainless steel, aluminum alloy and titanium alloy connecting pieces are assembled in structures of aluminum alloy, nickel alloy, high-alloying alloy steel and the like, in order to prevent the locking of the fastening pieces, external lubricants such as butter, molybdenum disulfide, mica, graphite, talcum powder or cetyl alcohol are generally adopted to lubricate the fastening pieces. But the tolerance requirement is high, and the riveting of a closed container adopts external lubricants such as butter, molybdenum disulfide, mica, graphite, talcum powder or cetyl alcohol, and the like, and can be air-dried, fall off or volatilize in the long-term use process, so that a gap is generated in a riveting structure. Therefore, the conventional external lubricant method is not suitable for the riveting of the closed container with high tolerance requirement.

Disclosure of Invention

The invention aims to solve the problems and provides an anti-corrosion lubricating coating for a dissimilar metal connecting piece for a metal composite structure, which adopts a method of an ultra-thin coating of the anti-corrosion lubricating coating, not only solves the problem of galvanic corrosion prevention between dissimilar metals, but also maintains good long-term lubricating performance.

In order to solve the problems, the technical scheme adopted by the invention is as follows:

the corrosion-resistant lubricating coating for the dissimilar metal connecting piece for the metal composite structure is characterized by comprising the following material components in parts by weight: 2000-4000 parts of molybdenum disulfide, 0-180 parts of strontium chromate, 2000-6000 parts of heat-resistant phenolic resin, 4000-5000 parts of ethylene glycol ethyl ether acetate, 0-200 parts of polytetrafluoroethylene, 30-50 parts of bentonite, 100-150 parts of polyamide wax liquid modifier and 10-30 parts of leveling additive.

Further, the molybdenum disulfide is 1000-mesh powder molybdenum disulfide.

Further, the strontium chromate is industrial pigment grade strontium chromate powder, and the fineness is not less than 600 meshes.

Further, the heat-resistant phenolic resin is No. II heat-resistant phenolic resin, 284 phenolic resin or 881 phenolic resin.

Further, the ethylene glycol monoethyl ether acetate is industrial-grade CAC111-15-9 ethylene glycol monoethyl ether acetate.

Further, the polytetrafluoroethylene is LUB5 polytetrafluoroethylene.

Further, the bentonite is MP100 organic bentonite.

Further, the polyamide wax liquid change assistant is 229 wax liquid change assistant or polyethylene wax liquid change assistant.

Further, the leveling auxiliary agent is a 3270 leveling agent or an HX-3310 leveling agent.

The working principle of the invention is as follows:

the molybdenum disulfide increases the self-lubricating properties of the coating.

And the recrystallization precipitation form of the strontium chromate after the coating is solidified realizes the enhancement of the coating strength of the coating.

The heat-resistant phenolic resin is used as a coating carrier, has wide compatibility and crosslinking property on organic and inorganic fillers, has high-temperature resistance, and improves the coating performance and the temperature resistance of a coating.

The ethylene glycol monoethyl ether acetate is used as a coalescing agent of the coating, and a film is slowly formed in the high-temperature curing process, so that the compactness of the coating is ensured.

The polytetrafluoroethylene improves the temperature resistance of the coating, so that the coating can keep the effectiveness at 200-50 ℃, and the corrosion resistance and the lubricating property of the coating are improved.

The organic bentonite forms gel in liquid resin, and has good thickening property, thixotropy, suspension stability, high-temperature stability, lubricity, film forming property, water resistance and chemical stability.

The polyamide wax liquid transformation assistant migrates on the surface in the curing process of the coating, and is separated out by recrystallization, so that the wear resistance and the lubricating property of the coating are improved.

The leveling auxiliary agent can reduce the surface tension of the coating, increase the wetting property and improve the leveling effect during coating.

The anti-corrosion lubricating coating provided by the invention has the following curing process parameters: curing at 180-240 deg.c for 30-60 min.

Compared with the prior art, the invention has the following beneficial effects:

the anticorrosive lubricating coating for the dissimilar metal connecting piece for the metal composite structure is suitable for surface anticorrosive treatment of dissimilar metal connecting pieces for metal composite structures such as aluminum alloy, titanium alloy and the like, is particularly suitable for anticorrosive lubrication of riveting positions of closed containers with high tolerance requirements, and has high temperature resistance, paint remover resistance and self-lubricating property. The method of adopting the ultra-thin coating of the anti-corrosion lubricating coating not only solves the problem of preventing galvanic corrosion between dissimilar metals, but also maintains good long-term lubricating performance.

Detailed Description

The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more readily understand the advantages and features of the present invention and to clearly and unequivocally define the scope of the present invention.