Production method for ship fastener complex coating

A composite coating and fastener technology, applied in the direction of coating, device for coating liquid on the surface, surface pretreatment, etc., can solve problems such as corrosion, achieve good corrosion resistance, solve corrosion problems, and good barrier performance Effect

Active Publication Date: 2013-09-25
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcoming that exists in the prior art, seek to design and provide a kind of preparation method of galvanized-zinc-aluminum-epoxy composite coating for fasteners used in ships and ocean engineering, by preparing galvanized coating on the surface of fasteners , zinc-aluminum and epoxy composite coatings to solve the corrosion problem of fasteners in marine environments and improve the corrosion resistance of fastener coatings

Method used

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  • Production method for ship fastener complex coating
  • Production method for ship fastener complex coating

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Embodiment

[0019] The fasteners involved in this embodiment have galvanized coatings, zinc-aluminum coatings, and epoxy coatings arranged from the inside out on the surface. The protective layer is formed by coating zinc-aluminum coating solution, curing zinc-aluminum coating, dipping epoxy coating solution and curing epoxy coating. The specific process steps are:

[0020] (1) Degreasing: Heat the fasteners in the existing heat treatment furnace to 150-250°C for 15-25 minutes, so that the grease on the surface of the fasteners is evaporated;

[0021] (2) Derusting: Sandblasting the degreased fasteners in the existing sandblasting machine to form the surface roughness of the fasteners in the form of metal particles, the sandblasting time is 5-15 minutes, The particle size of metal particles is 450-550 mesh;

[0022] (3) Zinc-seeding treatment: adopt the conventional mechanical energy-assisted seepage powder zinc-seeding process to carry out zinc-seeding treatment on the derusted fastener...

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Abstract

The invention belongs to the technical field of metal material surface processing and relates to a production method for a ship fastener complex coating. A zinc impregnation coating, a zinc-aluminum coating and an epoxy coating are arranged on the fastener surface from internal to external and zinc impregnation, washing, zinc-aluminum coating liquid dip-coating, zinc-aluminum coating solidification, epoxy coating liquid dip-coating and epoxy coating solidification are performed on the faster after sequentially being performed on oil removing and rust removing to form into a protective layer. The production method for the ship fastener complex coating has the advantages of being simple in production technology and reasonable in principle. The complex coating has the advantages of being good in corrosion resistance, being capable of effectively solving the problem that the faster is corroded in the seawater environment and being environmentally friendly.

Description

Technical field: [0001] The invention belongs to the technical field of metal material surface treatment, and relates to a preparation process of a zinc sherardizing-zinc-aluminum-epoxy composite coating for ship fasteners, in particular to a preparation method for a ship fastener composite coating. Background technique: [0002] Fasteners are widely used as a type of mechanical parts for fastening connections. Among various metal materials, ordinary steel fasteners are widely used, but carbon steel is easy to corrode, which affects the service life of fasteners. Therefore, it is necessary to add a corrosion-resistant coating to the surface of the fastener to prolong the service life of the fastener. Common protective coatings and measures for fasteners include cadmium plating, electro-galvanizing, hot-dip galvanizing, mechanical galvanizing and phosphating treatment , these technologies have a wide range of applications in the atmospheric environment, but when applied to ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D5/00B05D7/24B05D3/02
Inventor 林志峰李相波许立坤
Owner 725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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