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Coating process of galvanized spray paint for submersible ship carrier

A coating process and galvanizing technology, applied in hot dip coating process, metal material coating process, device for coating liquid on the surface, etc. , low service life and other problems, to achieve the effect of improving corrosion resistance, excellent adhesion, and excellent impact resistance

Active Publication Date: 2014-10-15
QINGTE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used anti-corrosion measures adopt the electro-galvanizing method, but the thickness of the zinc layer obtained by this type of technology is small, which is not suitable for large components; The need for long-term anti-rust and anti-corrosion
The above two traditional anti-rust and anti-corrosion measures cannot meet the working needs of protecting the substrate and prolonging the service life in special environments.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Coating process steps:

[0024] (1) Sanding the substrate. After the welding of the whole vehicle is completed, the assembly is transferred to the sand blasting room for blasting. The compressed air pressure is 0.5MPa, the diameter of the steel shot is 1.5mm, and the hardness of the steel shot is HV400; the diameter of the nozzle is 4mm, and each surface reaches the Sa2.5 standard.

[0025] (2) Hot dip galvanizing treatment. The sandblasted assembly is hot-dip galvanized. The minimum thickness of galvanized parts is required to be 100um, the galvanized layer is uniform and smooth, the surface has no obvious defects, and it is naturally cooled after galvanizing.

[0026] (3) roughening the galvanized layer. Since the surface after galvanizing is very smooth, the adhesion after spraying the primer will be affected, so the galvanized layer is required to be sanded and reprocessed. The surface roughness is the principle, and the zinc layer must not be removed.

[0...

Embodiment 2

[0034] 1. Coating process steps:

[0035] (1) Sanding the substrate. After the welding of the whole vehicle is completed, the assembly is transferred to the sand blasting room for blasting. The compressed air pressure is 0.6MPa, the diameter of the steel shot is 1.2mm, the hardness of the steel shot is HV500; the diameter of the nozzle is 6mm, and each surface reaches the Sa2.5 standard.

[0036] (2) Hot dip galvanizing treatment. The sandblasted assembly is hot-dip galvanized. The minimum thickness of galvanized parts is required to be 100um, the galvanized layer is uniform and smooth, the surface has no obvious defects, and it is naturally cooled after galvanizing.

[0037] (3) roughening the galvanized layer. Since the surface after galvanizing is very smooth, the adhesion after spraying the primer will be affected, so the galvanized layer is required to be sanded and reprocessed. The surface roughness is the principle, and the zinc layer must not be removed.

[0038]...

Embodiment 3

[0045] 1. Coating process steps:

[0046] (1) Sanding the substrate. After the welding of the whole vehicle is completed, the assembly is transferred to the sand blasting room for blasting. The compressed air pressure is 0.55MPa, the diameter of the steel shot is 1.4mm, the hardness of the steel shot is HV450; the diameter of the nozzle is 5mm, and each surface reaches the Sa2.5 standard.

[0047](2) Hot dip galvanizing treatment. The sandblasted assembly is hot-dip galvanized. The minimum thickness of galvanized parts is required to be 100um, the galvanized layer is uniform and smooth, the surface has no obvious defects, and it is naturally cooled after galvanizing.

[0048] (3) roughening the galvanized layer. Because the surface after galvanizing is very smooth, the adhesion after spraying the primer will be affected, so the galvanized layer is required to be sanded and reprocessed, and the compressed air pressure is required to be 0.25MPa, and the diameter of the steel...

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Abstract

The invention discloses a zinc-galvanizing and paint-spraying coating process for a submerged boat carrier, which comprises the following steps of: (1) sand blasting treatment for a base material; (2) hot zinc-galvanizing treatment; (3) roughening treatment for a zinc-galvanized layer; (4) spraying a base paint; and (5) spraying a finish paint. In the process, a workpiece is subjected to zinc galvanizing, and a zinc layer is an anode coating which has a function of electrochemical protection; by the hot zinc-galvanizing treatment for the base material, the corrosion resistance of the product is greatly improved; the sand blasting treatment for the base material before the zinc-galvanizing treatment, the natural cooling treatment after the zinc-galvanizing treatment and the sand blasting treatment before paint spraying respectively improve the adhesive force between the base material and the zinc layer, and between the zinc layer and the paint, and guarantee the surface quality; and the surface of the zinc-galvanized workpiece is sprayed with the antirust paint so as to effectively protect the base material, prevent rust and corrosion, prolong the service life and meet requirements on special working environment of the submerged boat carrier and other large-scale mechanical parts.

Description

technical field [0001] The invention relates to a zinc-dipping spray paint coating process, in particular to a zinc-dipping spray paint coating process for a submersible ship carrier, and belongs to the technical field of vehicle spraying. Background technique [0002] The submersible ship carrier is a transport vehicle designed and developed in recent years. It can perform underwater operations and transport ships and vehicles in seawater. Due to the particularity of the working environment, the durability and long-term effect of the main components of the submersible ship carrier (frame, wheel hub, oil cylinder, etc.) and their anti-rust and anti-corrosion measures have become important issues. [0003] At present, the commonly used anti-corrosion method adopts the electro-galvanizing method, but the thickness of the zinc layer obtained by this type of technology is small, which is not suitable for large-scale components; another anti-corrosion measure is to spray anti-rus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D1/38B05D3/00B05D3/12C23C2/06
Inventor 纪爱师纪建奕李守欣周冬生王元兵
Owner QINGTE GRP
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