ã€China Aluminum Network】 aluminum alloy building profiles can be divided into: oxidation profiles, electrophoresis profiles, powder coating profiles, fluorocarbon paint spray profiles, etc., and its processing technology as follows:
Oxidation profiles ï¬ Oxidation is the use of the substrate as the anode, placed in the electrolyte for electrolysis, forming a protective oxide film on the substrate surface.
ï¬ Oxidation process: Substrate → Mounting → Degreasing → Washing → Alkaline etching → Washing → Neutralization → Washing → Anodizing → Washing → Electrolytic coloring → Washing → Sealing → Washing → Drying → Unloading → Inspection → Packaging → Storage ï¬ Main characteristics of alumina material:
1, has a strong wear resistance, weather resistance, corrosion resistance.
2, can form a variety of colors on the surface of the substrate, a large limit to meet your requirements.
3, strong hardness, suitable for a variety of construction, industrial materials production oxidized products are:
Oxidized flat white material, oxide coloring material, oxidation matte white material, oxidation matte coloring material.
ï¬ Performance of anodic oxide film ï¬ Film thickness grade Average film thickness/μm, not less than partial film thickness/μm, not less than AA10 10 8
AA15 15 12
AA20 20 16
AA25 25 20
Sealing quality:
Nitric acid pre-soaked phosphoric acid test, the quality loss value should not exceed 30mg/dm2
Color, color difference:
The color should be basically the same as the swatches agreed upon by the supply and demand sides, or within the color range defined by the upper and lower limit color scales set by the supply and demand sides. If the demand side requires the use of the instrument method to determine the color, the allowable color difference shall be agreed upon by the supplier and the buyer.
Other properties include salt spray corrosion resistance, wear resistance, and weather resistance.
Electrophoresis profiles ï¬ Electrophoresis uses alumina as the anode, which is placed in a water-soluble latex solution, and is coated with a DC coating to form a coating film on the surface of the aluminum oxide film. After the painting, the paint film shall be baked and cured to form a firm and hard paint film. Forms a kind of protection to the aluminum material, its adhesion, the uniformity, the weather resistance causes the aluminum material color to be smoother and more even, and causes the aluminum material to achieve the acid resistance, the alkali resistance.
ï¬ Excellent resistance to cement mortar in building construction. It is more resistant to acid, alkali and weathering in coastal areas and areas with poor air environment.
ï¬ electrophoresis process: substrate → loading → degreasing → washing → alkaline etching → washing → neutralization → washing → anodizing → washing → electrolytic coloring → washing → hot water washing → electrophoresis → washing → baking → discharge → inspection → Packaging → Storage ï¬ Electrophoresis products:
Electro-optical white, electro-optic champagne 1#, electro-optic champagne 2#, electro-optic shallow ancient tung, electro-optic black pearl, electric sand white, electrosand imitation steel, electric sand champagne.
Electrophoretic aluminum features:
1, rich colors, for the spray, will never appear corners, concave exposed bottom phenomenon.
2, has a strong paint film hardness, strong impact resistance.
3, with high paint adhesion, not easy to fall off aging.
4. It has stronger wear resistance, weather resistance and alkali resistance than aluminum oxide.
ï¬ Anodic composite film thickness class, film type, typical application film thickness class Surface film type Typical use A Glossy or matt clear paint Exterior outdoor use in harsh environments B Outdoor building or vehicle parts S Light or Matte colored paint outdoor building or vehicle parts ï¬ Composite membrane performance film thickness / μm
Film Thickness Level Local Thickness of Anodic Film Partial Thickness of Paint Film Local Thickness of Composite Film A ≥9 ≥12 ≥21
B ≥9 ≥7 ≥16
S ≥6 ≥15 ≥21
ï¬ Color, color difference: The color should be basically the same as the swatches agreed upon by the supply and demand sides, or be within the color range defined by the upper and lower limit color scales set by the supply and demand sides. If the demand side requires the use of the instrument method to determine the color, the allowable color difference shall be determined by both the supplier and the buyer.
ï¬ Hardness of paint film: After pencil scratch test, grade A and B paint film hardness ≥ 3H, grade S paint film hardness ≥ 1H
ï¬ Adhesion of paint film: The dry adhesion and wet adhesion of the paint film reach level 0.
ï¬ boiling water resistance: After the boiling water resistance test, the paint film should be no wrinkles, cracks, bubbles, and no loss or discoloration.
ï¬ Abrasion Resistance, Hydrochloric Acid Resistance, Mortar Resistance, Solvent Resistance, Washability, Salt Spray Resistance, Moist Heat Resistance, Weathering Resistance Powder Spraying Profiles ï¬ Powder Spraying Aluminum, the process is a process including chromizing, Spraying, baking and other processes. After the powder coating, the paint film shall be baked and cured to form a solid and hard colored paint film on the surface of the original aluminum material. Forms a kind of protection to the aluminum material, its adhesion, the uniformity, the weather resistance causes the aluminum material color to be smoother and more even, and causes the aluminum material to achieve the acid resistance, the alkali resistance.
ï¬ The basic principle is: using thermosetting saturated polyester powder, after chromate treatment, use spraying to make the color adhere to the surface of the product and dried at 200°C.
ï¬ Powder spraying process: Picking → Blowing aluminum chips → Checking → Barsing → Washing → Degreasing and degreasing → Washing → Pure water washing → Chromizing → Washing → Soft pure water washing → Dripping → Drying → Testing → Unloading → Inspection → Shelf → Soot Blower → Powder Spraying → Inspection → Curing → Unloading → Inspection → Packaging → Storage ï¬ Spraying products are:
Spray color RAL color can be sprayed, the surface forms are: flat, sand, wrinkles three. Plane brightness is divided into: high light (80,90), half light, flat light (75), matt, low light (40,30,25), no light, etc., can be sprayed to establish the body wood profile, fluorocarbon powder coating product.
Powder coating features:
A wide variety of colors, complete specifications, according to the international color standard production of more than 200 different colors of aluminum, beautiful and generous, very high-grade European architectural style.
2 Good anti-corrosion performance and excellent salt spray resistance.
3 good weathering performance, the coating can be maintained for more than 30 years without chalking, the loss of light and discoloration rate of at least one level.
4 good wear resistance, hardness greater than 2h.
5 anti mortar corrosion, easy construction.
6 The coating has good bonding force. When the profile is bent, the coating will not crack. It is suitable for various shapes and processes.
7. Difficult to attach grease, easy to clean and scrub.
8. The use of self-produced high-quality aluminum ingots, the inherent quality is pure and stable.
Spray coating thickness: the coating thickness on the decorative surface is less than 40 μm.
Note: Due to the complexity of the cross-sectional shape of the extruded profile, it is permissible that the coating thickness of certain surfaces of the profile (such as internal corners, lateral grooves, etc.) is lower than the specified value.
ï¬ Coating performance ï¬ Gloss: The 60° gloss value of the coating and its allowable deviation should conform to 3~30±5; 31~70±7; 70~100±10
ï¬ Color and color difference: The color of the coating should be basically the same as the magnetic plate agreed upon by both parties. When using the color difference meter, the color difference between the monochromatic coating and the template is ΔEab*≤1.5, and the color difference between the same lot (referred to as the delivery lot) is ΔEab*≤1.5.
ï¬ Coating thickness: The smaller partial thickness of the coating on the decorative surface is ≥ 40 μm. Note: Due to the complexity of the cross-sectional shape of the extruded profile, it is permissible that the coating thickness of certain surfaces of the profile (such as internal corners, lateral grooves, etc.) is lower than the specified value.
ï¬ For non-decorative surfaces of profiles, spray coating should be specified in the contract.
Indentation hardness: coating anti-indentation ≥ 80
ï¬ Adhesion: The dry adhesion, wet adhesion, and boiling water adhesion of the coating should reach 0 level.
ï¬ Impact resistance, cupping resistance, bending resistance, abrasion resistance, boiling water resistance, hydrochloric acid resistance, mortar resistance, solvent resistance, washing resistance, salt spray corrosion resistance, moist heat resistance, weather resistance Fluorine-carbon paint sprayed profiles Fluorine-carbon sprayed aluminum is an aluminum alloy hot extrusion profile coated with polyfluoroethylene paint. The process is a process including chromizing, painting and baking. After the fluorocarbon spraying, the paint film shall be baked and cured to form a solid and hard colored paint film on the surface of the original aluminum material. Forms a kind of protection to the aluminum material, its adhesion, the uniformity, the weathering resistance, resists the cement mortar nature, causes the aluminum material color to be smoother, evener, and causes the aluminum material to achieve the acid resistance, the alkali resistance. Its characteristics maintain the color and luster of aluminum.
ï¬ Fluorocarbon paint spraying process: picking, slicing, washing, degreasing, degreasing, rinsing, rinsing, rinsing, rinsing, rinsing, rinsing, rinsing, rinsing, rinsing, rinsing, rinsing, rinsing, rinsing, rinsing, rinsing, drying - Leveling → Finishing → Leveling → Varnish → Leveling → Curing → Cooling → Dropping → Testing → Packaging Storage ï¬ Fluorocarbon spraying features:
1. Weather-resistance 1. It has excellent function of resisting bad weather and it is not attacked by ozone.
2, UV-resistant with a UV degradation, anti-powdering performance, long-term to maintain the inherent color and gloss 3, chemical resistance with an acid, alkali erosion and air pollution, acid rain attack 4, corrosion resistance Low moisture and corrosion permeability, long-term resistance to harsh environments without corrosion 5, mechanical properties, excellent impact resistance, corrosion resistance and excellent paint film flexibility.
6, anti-mildew, bacterial contamination of a good moisture resistance is the growth of mold non-nutrient 7, the cost of an extremely easy maintenance. Because it has the property of not accumulating dust and dirt. Therefore, the cleaning work and cost of the building can be reduced to a lower level.
ï¬ spray paint coating types:
Two coats: Primer topcoat three: Primer finish Varnish four: Primer block varnish varnish ï¬ Paint film thickness on decorative surface:
Coating Type Average Film Thickness/μm Small Local Film Thickness/μm
Two painted ≥30 ≥25
Three coated ≥40 ≥34
Four coats ≥65 ≥55
Note: Due to the complexity of the cross-sectional shape of the extruded profile, the film thickness on certain surfaces of the profile (such as interior corners, horizontal grooves, etc.) is lower than the specified value, but the exposed bottom is not allowed.
ï¬ film hardness ≥1H
ï¬ The adhesion level reaches 0.
ï¬ Other properties: impact resistance, abrasion resistance, boiling water resistance, hydrochloric acid resistance, nitric acid resistance, mortar resistance, solvent resistance, washing resistance, salt spray corrosion resistance, moist heat resistance, weather resistance
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