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Anti-corrosion lubricating composite coating for fastener and preparation method for anti-corrosion lubricating composite coating

A composite coating and lubricating coating technology, which can be applied to coatings, metal material coating processes, and devices for coating liquids on surfaces, etc. Lubrication performance requirements, the effect of improving corrosion resistance

Pending Publication Date: 2021-10-22
AEROSPACE PRECISION PROD INC LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention aims to propose a corrosion-resistant lubricating composite coating for fasteners and a preparation method thereof to solve the problem that a single coating layer cannot take into account the corrosion resistance and lubrication of carbon steel, alloy steel, and stainless steel fasteners in harsh corrosive environments. Problems with lubricity

Method used

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  • Anti-corrosion lubricating composite coating for fastener and preparation method for anti-corrosion lubricating composite coating
  • Anti-corrosion lubricating composite coating for fastener and preparation method for anti-corrosion lubricating composite coating
  • Anti-corrosion lubricating composite coating for fastener and preparation method for anti-corrosion lubricating composite coating

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Embodiment 1

[0039]The name of the fastener product is hexagonal self-locking nut, the product standard is GB1337-88, the material is 30CrMnSiA, and the specifications are M6, M8 and M10. The composite coating used is electroplated zinc-nickel color passivation + molybdenum disulfide dry film lubricating coating, the bottom layer is electroplated zinc-nickel alloy, the nickel content in the alloy coating is 8-15%, and the color passivation is post-treated. The surface layer is molybdenum disulfide dry film lubricating coating, which is prepared by manual dip coating. Preparation process: degreasing→hot water washing→cold water washing→sand blasting→activation→cold water washing→neutralization→cold water washing→electroplating zinc-nickel alloy→cold water washing→drying→dehydrogenation→lighting→cold water washing→color passivation→cold water washing →drying→dipping molybdenum disulfide→pre-curing→spraying molybdenum disulfide→curing→inspection. The appearance of the coating is gray-black, ...

Embodiment 2

[0044] Fastener products are hexagonal head bolts and hexagonal self-locking nut assemblies. The standard of hexagonal head bolts is HB1-201-95, the material is 0Cr17Ni3Cu4Nb, and the specification is M8; the standard for hexagonal self-locking nuts is GB1337-88, the material is 30CrMnSiA, and the specification is M10.

[0045] The composite coating used for the hexagonal head bolts is ion plating aluminum + cetyl alcohol, the bottom layer is pure aluminum coating prepared by evaporation ionization aluminum plating method, arodin oxidation post-treatment, the surface layer is cetyl alcohol dry film prepared by dip coating method Lubricating coating, the concentration of cetyl alcohol is 6-12%. Preparation process: degreasing→hot water washing→cold water washing→wet sandblasting→cold water washing→pickling→cold water washing→hot pure water washing→drying→ion evaporation aluminum plating→tumbling→cold water washing→Arodin 1200S oxidation→cold water washing → dry → apply cetyl al...

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Abstract

The invention provides an anti-corrosion lubricating composite coating for a fastener and a preparation method for the anti-corrosion lubricating composite coating. The anti-corrosion lubricating composite coating comprises a bottom layer and a surface layer, wherein the bottom layer is a metal coating which is prepared from the effective components of one or more alloys of zinc, nickel, cadmium and aluminum, and the surface layer is a lubricating coating which is prepared from the effective components of one or more of hexadecanol, molybdenum disulfide, fluorocarbon and graphite. By using the composite coating disclosed by the invention, the bottom layer can also serve as a sacrificial anode to play a role in cathode protection while playing a role in physical protection on a matrix, so that the corrosion resistance is improved; and the surface layer adopts a dry film lubricating coating and is coated on the bottom layer with strong binding force with the bottom layer, so that the composite coating has both the corrosion resistance and the lubricating performance, and the anti-corrosion and lubricating performance requirements of a thin coating in a harsh corrosion-resistant environment are met.

Description

technical field [0001] The invention belongs to the technical field of composite coatings, in particular to a corrosion-resistant and lubricating composite coating for fasteners and a preparation method thereof. Background technique [0002] With the implementation of the "Deep Sea Strategy", many aerospace equipment has been transferred to serve at sea. As the fastening connection parts of aerospace equipment, fasteners play an important role in the reliable use of equipment. The marine environment is one of the most corrosive environments. The corrosion problem of supporting fasteners is becoming more and more prominent. Many threaded fasteners exposed to the marine environment for a long time are severely corroded. Failure, causing great difficulties to the normal service and maintenance of fasteners. Threaded fasteners have the characteristics of fast corrosion, many influencing factors and difficult maintenance in marine environment. [0003] Fasteners used in aerosp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/00
CPCB05D5/00B05D5/08B05D7/14B05D7/51B05D3/002B05D3/102C25D3/22C25D3/26C25D3/44C25D3/565C25D5/36C25D5/48C23C14/16C23C14/021C23C14/028C23C14/024C23C14/5846C23C14/5853C23C2/06C23C2/04C23C2/12C23C2/02C23C2/26
Inventor 刘燕李文生郭绕龙许彦伟樊金桃沈超
Owner AEROSPACE PRECISION PROD INC LTD