Can aluminum coil be painted?

Dec. 30, 2024

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Aluminum Coil Coating Line & Two Coat Two Bake Lines

Why coat metal?

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Aluminum coils and galvanized steel strips undergo a dual coating and baking process in specialized lines to ensure both high durability and an attractive look. Exterior-grade panels utilize PVDF Kynar 500 fluorocarbon coating, while interior-grade panels are finished with a polyester coating.

Benefits

Utilizes high precision rolling coater for an excellent coating layer quality.
Compatible with a variety of coatings: Acrylic, Polyester, Polyvinylidene, and Fluoride (PVDF).
Custom designed to fit the specifications of the customer's factory.
The fine coating layer meets international standards.
Easy to operate and control, with online operation training provided.
Coater made with PU and Chromate coating rollers offers distinct advantages.

PU Roller

Suitable for complete coating; offers a matted surface effect and can replicate wooden granite patterns. Coating thickness can vary. Minor impurities don’t easily lead to surface defects.

Chromate Roller

Ideal for thinner coils. The coated surface has a high gloss and is delicate. This roller is abrasion-resistant, sustainable, and has lower maintenance costs.

Aluminum Coil Coating Line Process Flow in Production Line

Two Coat Two Bake Lines Process Flow in Production Line

Aluminum Coil Coating Line Specification

Item & Type	CCL--AL25	CCL--AL40
Line Speed	25M/min	40M/min
Strip Width	1,000 / 1,600 mm / 1,000 / 2,000 mm	1,000 / 1,600 mm / 1,000 / 2,000 mm
Strip Thickness	0.12 - 0.7 mm	0.15 - 0.8 mm
Coil O/D	1,200 mm	1,200 mm / 1,300 mm
Coil I/D	Ø405 mm / Ø508 mm	Ø405 mm / Ø508 mm
Coil Weight	3,000 kgs / 5,000 kgs	3,000 kgs / 5,000 kgs
Paint Type	Polyester, PVDF, SMP, Epoxy, Acrylics, Urethanes	Polyester, PVDF, SMP, Epoxy, Acrylics, Urethanes
Line Space Dimension	52,000L x 8,000W x 5,500H mm	60,000L x 8,000W x 5,500H mm
Line Weight	42,000kgs (approx.)	48,000kgs (approx.)
Line Power	125HP / 60KW	178HP / 60KW
Water Consumption (Soft Water)	300 ~ 600 L/min for cooling tower recirculation used	300 ~ 600 L/min for cooling tower recirculation used
Compressed Air Consumption	0.8 ~ 1.5 m³/hr	0.8 ~ 1.5 m³/hr

The above specification is for reference only.
ALUMAX reserves the right to make any changes.

Two Coat Two Bake Lines Specification

Item & Type	CCL--AL30 (2C2B)	CCL--AL45 (2C2B)	CCL--AL60 (2C2B)
Coating paints	Polyester, SMP, PVDF, Epoxy, Acrylics, Urethanes	Polyester, SMP, PVDF, Epoxy, Acrylics, Urethanes	Polyester, SMP, PVDF, Epoxy, Acrylics, Urethanes
Production speed	30 M/min.(Max.)	45 M/min.(Max.)	60 M/min.(Max.)
Oven Heating	NG / Electricity	NG / Electricity	NG / Electricity
Material	Aluminum Coil	Aluminum Coil	Aluminum Coil & Galvanized Steel
Product Thickness	0.2-1.0 mm	0.2-1.0 mm	0.2-1.0 mm
Product Width	1,000 mm	1,000 mm	1,000 mm
Coil O/D	Ø1,400 mm	Ø1,500 mm	Ø1,800 mm
Coil I/D	Ø405 mm / Ø508 mm	Ø405 mm / Ø508 mm	Ø405 mm / Ø508 mm
Coil Weight	5,000 kgs(max.)	7,000 kgs(max.)	10,000 kgs(max.)
Compressed Air Consumption	0.2~1.2 m³/min @ 0.7MPa Clean & Dry	0.2~1.2 m³/min @ 0.7MPa Clean & Dry	0.2~1.2 m³/min @ 0.7MPa Clean & Dry

5 Methods of Coating Aluminum Coil - CHAL

Introduction

Color-coated aluminum coil is a product obtained by applying color to the surface of an aluminum coil. Due to its high cost-effectiveness, it finds extensive use in aluminum ceilings, roof surfaces, scrap steel, cans, aluminum veneer curtain walls, and other industries. Besides its cost advantage, does this product offer other benefits?

1. Why use a coating aluminum coil?

Bright colors and strong decoration

Color-coated aluminum coils exude a tangible physical hierarchy, imparting a sense of freshness and elegance. Furthermore, colors can be tailored to meet specific needs of enterprise customers, ensuring high-quality decorative material performance.

The excellent technical performance and high folding resistance

The raw materials used in this product are selected for their high quality, ensuring superior product reliability. It performs excellently under various working pressures and environmental conditions without bending, deformation, or shell expansion, offering a high application effect.

2. Methods of coating aluminum coil

Aluminum coil coatings primarily focus on anti-corrosion features. Below are different methods for coating aluminum coils.

Brush coating of aluminum coil

Brush coating is a traditional manual method, known for its simplicity and flexibility. It allows application on various shapes and enables the paint to penetrate the metal surface, enhancing adhesion. Its downsides include high labor intensity and difficulties in achieving a uniform finish.

Scratch Coating of aluminum coil

Scratch coating is unsuitable for automotive applications and is mainly used for high-viscosity liquid coatings. Common issues with this method are cracking, detachment, and uneven thickness of the coating.

Dip coating of aluminum coil

This traditional Chinese method involves immersing the object in a paint solution. Excess paint can be either dripped back into the tank or mechanically removed. This technique has environmental implications due to solvent loss and can lead to inconsistent coating thickness.

Spray coating of aluminum coil

In spray coating, paint is propelled from a nozzle onto the object, forming a consistent coating film. While equipment is simple and production is relatively easy, the coating may lack uniform smoothness and often requires additional solvents, which can introduce pollution issues.

Spraying of aluminum coil

Spraying uses compressed air to project paint onto the object. The paint is atomized and creates a mist that ensures even coverage. This method requires paints with lower viscosity, suited for various architectural coatings and industrial applications.

At CHAL aluminium coil manufacturing, we frequently supply products to construction and manufacturing sectors, due to the characteristics of aluminum coils. We also provide aluminum foil, tubes, and plates. For aluminum alloy products, please reach out through our homepage.