Profile fluorocarbon coating process

A fluorocarbon coating and profile technology, used in coatings, devices for coating liquids on surfaces, pre-treatment surfaces, etc., can solve the problems of easy peeling, cheap texture, insufficient coating adhesion, etc., and achieve complete removal of impurities. , Increase the adhesion of the powder layer, the effect of the smooth surface of the profile

CN108380471AInactive Publication Date: 2018-08-10ZIGONG DONGFANG STEEL STRUCTURE
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-08-10
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention discloses a coating process, and particularly provides a profile fluorocarbon coating process. The profile fluorocarbon coating process aims at solving the problems that in the prior art, the thickness of a fluorocarbon coating is not uniform, and due to the fact that the coating is too thick, the texture is cheap, the adhesive force of the coating is insufficient, and the coating isprone to peel. The profile fluorocarbon coating process includes the following steps of (1), polishing; (2), alkaline etching; (3), washing; (4), passivating; (5), primer spraying, wherein epoxy zincrich primer is sprayed twice by an airless sprayer, the thickness of the epoxy zinc rich primer sprayed each time is 8 micrometers, and the spraying interval is 2.5 h; (6), finish paint spraying, wherein embroidery fluorocarbon paint is sprayed twice by a high-voltage static spray gun, the spraying interval is 24 h, surface drying is carried out after the embroidery fluorocarbon paint is sprayed,the surface drying time ranges from 38 h to 48 h, and the thickness of a fluorocarbon embroidery paint dry film formed after surface drying ranges from 40 micrometers to 50 micrometers; and (7), lustering. The paint thickness can meet the beautifying effect of profiles, the paint is not too thick, meanwhile the profiles can be protected sufficiently, and the texture is shown better.
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Description

technical field

[0001] The invention relates to a coating process, in particular to a profile fluorocarbon coating process. Background technique

[0002] At present, metal profiles are widely used in the construction industry due to their excellent durability, decoration and formability. Due to its good processing performance and light weight, aluminum profiles account for more than 80% of the amount of metal profiles, especially aluminum building materials with powder coatings. Compared with anodic oxidation and electrophoretic coating surface treatment methods, the pollution of water and air The degree and energy consumption are significantly reduced, and the mechanical properties of the coating film such as hardness, wear resistance, acid resistance and other indicators are greatly improved, and the service life is twice as long as that of ordinary aluminum oxide materials, and the colors are rich, which can better reflect the diversity of buildings. personalization. ...

Examples

Embodiment 1

[0027] A profile fluorocarbon coating process, characterized in the following steps:

[0028] (1) Polishing: Use an elastic wire wheel to polish and remove rust on the surface of the profile;

[0029] (2) Alkali corrosion: The time for the profile to be placed in the alkaline tank is 6 minutes, and the control temperature is 50°C;

[0030] (3) Washing: wash the profile after alkali etching with tap water for 3 minutes and then take it out;

[0031] (4) Passivation: In an environment with a temperature of 60°C to 75°C, conduct passivation treatment on the surface of the profile to obtain a passivation film of 0.8 μm to 1.5 μm;

[0032] (5) Spray primer: Spray two coats of epoxy zinc-rich primer with an airless sprayer, each coat of epoxy zinc-rich primer is 8 μm thick, and the spraying interval is 2.5 hours;

[0033] (6) Spray topcoat: Use a high-voltage electrostatic spray gun to spray two coats of embroidered fluorocarbon paint. The spraying interval is 24 hours. After spra...

Embodiment 2

[0036] A profile fluorocarbon coating process, characterized in the following steps:

[0037] (1) Polishing: Use an elastic wire wheel to polish and remove rust on the surface of the profile;

[0038] (2) Alkali corrosion: Put the profile in the alkaline tank for 10min to 20min, and control the temperature at 46°C to 53°C;

[0039] (3) Washing: wash the profile after alkali etching with tap water for 3 minutes to 5 minutes and then take it out;

[0040] (4) Passivation: In an environment with a temperature of 65°C, conduct passivation treatment on the surface of the profile to obtain a passivation film of 1 μm;

[0041] (5) Spray primer: Spray two coats of epoxy zinc-rich primer with an airless sprayer, each coat of epoxy zinc-rich primer is 8 μm thick, and the spraying interval is 2.5 hours;

[0042] (6) Spray topcoat: Use a high-voltage electrostatic spray gun to spray two coats of embroidered fluorocarbon paint. The spraying interval is 24 hours. After spraying, it is sur...

Embodiment 3

[0045] A profile fluorocarbon coating process, characterized in the following steps:

[0046] (1) Polishing: Use an elastic wire wheel to polish and remove rust on the surface of the profile;

[0047] (2) Alkali corrosion: Put the profile in the alkaline tank for 10min to 20min, and control the temperature at 46°C to 53°C;

[0048] (3) Washing: wash the profile after alkali etching with tap water for 3 minutes to 5 minutes and then take it out;

[0049] (4) Passivation: In an environment with a temperature of 60°C to 75°C, conduct passivation treatment on the surface of the profile to obtain a passivation film of 0.8 μm to 1.5 μm;

[0050] (5) Spray primer: Spray two coats of epoxy zinc-rich primer with an airless sprayer, each coat of epoxy zinc-rich primer is 8 μm thick, and the spraying interval is 2.5 hours;

[0051] (6) Spray topcoat: Spray two coats of embroidery fluorocarbon paint with a high-voltage electrostatic spray gun. The spraying interval is 24 hours. After sp...