Why Choose Coil Anodizing?
Unique flexibility to shape the product
Wide range of capacity sizes
Highest quality standards globally: guarantees minimum anodic layer thickness Full sealing guarantee - the best on the market

Over 40 years of material experience: iconic global constructions (such as the Louvre Museum extension in France, Dalian International Conference Center, etc.)
Supplier of raw materials to Rimowa, covering aviation, construction, and medical industries

Why Anodized Aluminum is Needed?
Real metallic appearance and texture that combines texture with color, creating the shape of the surface structure during changing daylight and lighting conditions.

All-weather durability across seasons, no dust, no fading, and no filiform corrosion: the anodic layer is UV-resistant and colorfast.

100% recyclable, environmentally friendly, genuine quality assurance, and fingerprint resistant

Real metallic appearance and texture that combines texture with color, creating the shape of the surface structure during changing daylight and lighting conditions.
All-weather durability across seasons, no dust, no fading, and no filiform corrosion: the anodic layer is UV-resistant and colorfast.
100% recyclable, environmentally friendly, genuine quality assurance, and fingerprint resistant.
Coil's continuous anodizing surpasses traditional anodizing.
Numerous colors and uniform gloss.
Flexible anodic layer thickness; necessary post-treatment
Lifetime warranty (with warranty certificates of varying durations)
Excellent results in weight reduction testing
No loss of anodic layer thickness over time

Coil Sheet Anodizing is Superior to Traditional Sheet Anodizing
Outstanding uniformity.
Consistent bath concentration.
Fully automated batch production lines.
Flexible anodic layer thickness; as required for post-treatment.
Combines the advantages of continuous and sheet anodizing.
Excellent results in weight reduction testing.
No loss of anodic layer thickness over time.

顏色均勻性
顏色均勻性由以下決定:
-金屬基材
-著色過程
關於保證的協議，特別是在顏色的情況下要注意
最小-最大顏色:每個項目要商定和確認
由ΔE定義的顏色範圍
顏色表中顯示的顏色可能與實際產品略有不同。確認顏色與顏色樣本。
生產批次之間的顏色可能略有不同。為了確保顏色的一致性，我們建議將總需求放在一個訂單中。
如果您在一個項目中使用來自不同生產批次的相同顏色的材料，請提前諮詢。

Delta E Color Uniformity

Combination

Performance

Natural ：Delta E <= 3,5

Color：Delta E <= 7

Natural:delta E <= 2

Color:delta E <= 6

Natural:Delta E <= 1

Color:Delta E <= 5

Maximum - Minimum Sample
Samples produced on a laboratory scale: representing the largest to the smallest range possible (specified)
Based on sheet anodizing in production: 1 batch = 1 production run, 1 specification, and 1 width
Production line practice: Color adjustments towards agreed minimum to maximum stable production runs
Delta E in one batch throughout the project
Supplementary measurements, recording (test reports), and certification.

COIL is ISO 9001 certified (ISO 9001 ≠ QSCA ISO 9001) as a general quality management system. QSCA is used for continuous anodizing.

QSCA sets the highest standard for the quality of continuous anodizing.

Unique attributes of QSCA: Same series AQ metal, extremely high gloss uniformity: Gloss variation <8 GU.

Extreme color uniformity: Delta E color variation <1 indicates natural, Delta E <5 indicates color variation.

Best sealing in the market: Weight loss <15 mg/dm².

Lifetime warranty: Full production reports and analysis provided with compliance certificates.

Perfect surface consistency for large landmark projects, meeting the strictest requirements of architects and designers.

Traditional sheet anodizing: Hard and brittle layer – no post-treatment possible.

Aloxide = Next-generation sheet anodizing.

Continuous anodizing

Flexible layer -> can be post-processed, such as bending

Building inspection reports

Coating finishes are one of the most critical visual elements in construction.

The choice of finish has a decisive impact on the building's lifespan.

Independent engineering studies on various buildings with lifespans exceeding 30 years.

Research findings:

No signs of erosion of the anodic layer.

Anodic layer thickness remains unchanged from initial values.

No deterioration due to adhesion, delamination, frosting, peeling, bubbling, cracking, etc.

No impact on surface fading.

Exclusive supplier of metal: Suppliers must be certified.

Metal needs AQ grade.

Consistent quality across different casting batches, varying specifications, and widths.

Strict tolerances on chemical composition => Color uniformity.

Traceability

Metal processing techniques are crucial.

Anodizing treatment using constant and monitored process parameters.

Metal structure remains visible => Arrange installation direction respecting the rolling direction.

Use protective films with lines and arrows.

Panel colors may vary between different production batches. It is essential that panels installed on the same facade come from the same production batch.

Carbon intensity of European primary aluminum production: Decreased by 21% compared to 2010 and decreased by 55% compared to 1990.

European aluminum emits about 7 kg of CO2 equivalent per kilogram,

compared to the global average of 18 kg per kilogram.

Carbon intensity of semi-finished processes in Europe: Aluminum rolling processes have decreased by 25% since 2010.

Carbon intensity of output processes has decreased by 11%.

Carbon intensity of process waste recovery (remelting)

in Europe has decreased by 9% since 2010.

Temperature Resistance

Temperature <80°C: Pre-anodized aluminum is not affected.

80°C < Temperature <180°C: More pronounced cracking – but minimal impact on visual appearance.

Some corrosion resistance is reduced.

Temperature >180°C:

Cracking, reduced corrosion resistance, potentially leading to severe damage

Note: Temperature should not be the only consideration; time will be a contributing factor.

Border Effect

The border or edge of the anodized layer has a thickness greater than that in the middle (extremely up to 150%).

In the middle of the anodized layer, the nominal layer thickness refers to the front and middle of the coil.

Verso: The anodized layer thickness is 1/3 to ½ of the front anodized layer but is not guaranteed.

Provide double-sided specifications upon request.

Double-sided anodization:

Only applicable for natural anodization and can be provided upon request.

Guarantees specialized processing on the top (front) and bottom (reverse) sides.

Possible standard combinations:

Anodized layer

Width

Thickness

2 µm / 2 µm

1000-1200mm

0.3mm-1mm

6 µm / 3 µm

1000-1600mm

0.5mm-2mm

5 µm / 5 µm

800-1600mm

0.6mm-2mm

12 µm / 6 µm

1000-1600mm

1mm-3.5mm

Customizable Different Anodized Layer Thicknesses

Sealing Phase - Dye Spot Test - According to ISO 2143

Information on the sealing quality is obtained by testing the resistance of the anodized layer. soscope - Complies with EN ISO 2360

Dye Absorption: A drop of specified acid solution is kept on the test surface horizontally for 1 minute, then rinsed and dried.

Surface Attack: Continuously, at the same point, after allowing a drop of specific dye for 1 minute, clean the surface with a slight abrasive and gently wipe it. Inspect the test area for stain intensity. The absorption intensity will be compared with the standards.

Inspect the test area for stain intensity. The absorption intensity will be compared with the standards.

Loss of absorption capacity is classified numerically: Excellent sealing quality = total loss of absorption capacity

Poor sealing quality = loss of no absorption capacity

Calculate the mass loss and express it as the difference in weight (unit: mg/dm2)

Anodized Layer Measurement

Measurement equipment: Isoscope - Complies with EN ISO 2360

Neutral Salt Spray Test: Compliant with ISO 9227

Evaluates corrosion resistance in a NaCl environment, simulating marine atmospheric conditions

Samples with an anodic layer thickness of 10 - 15μm are tested for 1000 hours

By immersing the samples in a nitric acid solution

Kesternich Test - SO2 atmosphere Compliant with ISO 6988

Assessment of Sulfur Dioxide Corrosion Resistance

Environment - Represents industrial environmental cyclic wetting and drying tests.

1 Cycle:

Exposure to SO2 atmosphere for 8 hours (100% RH, 40°C)

Exposure to ambient atmosphere for 16 hours (Relative humidity 70%, temperature 23°C)

42 cycles (+/- 1000 hours) of testing

Evaluation according to ISO 10289:

Assessment of the ability to protect the base material from corrosion.

Assessment of the ability to maintain the integrity of the protective layer.

Results:

Fewer than 20 cycles - Most samples showed no signs of pitting corrosion.

Good corrosion protection (with an anodic layer thickness of 15μm or more).

Florida Exposure Testing

For 75 years, the Miami area in the southern part of Florida has been the benchmark for outdoor material durability testing.

The combination of high levels of ultraviolet radiation, humidity, and temperature provides a subtropical environment widely used for outdoor exposure testing.

Standard Continuous Anodized Aluminum - Traditional Batches

Anodized Aluminum - Precoated Aluminum

Testing Period: April 19, 2007, to April 25, 2017

Testing Type: Inland weathering

Testing Location: Miami, Florida (Latitude 26° North)

Exposure Type: Tilted at a 45° angle facing south horizontally.

Conclusion

Anodized aluminum: Maintains gloss, colorfastness, and no powdering.

(1) Weather Resistance

Assessing the resistance of anodized aluminum to humid environments

Atmospheric conditions at high temperatures → Tropical testing

Tropical testing – DIN 50017:

Samples in a climate chamber (100% relative humidity and 40°C) are evaluated for corrosion marks and appearance changes after 200h and 450h: Excellent protection

Corrosion initiated on cross-etching but does not propagate beyond.

(2) Packaging

Metal quality and handling are crucial. High-quality products need protection during this phase.

(3) Transportation

Different types of transportation require different forms of protection: road transport, maritime shipping, air transport.