What Is ASTM A428 Aluminum Coating Weight?
ASTM A428 specifies a test method for determining the weight of aluminum coatings applied to iron or steel articles. The test measures the coating mass per unit area to evaluate coating thickness, uniformity, and protective performance.
This method is widely used in industries that use aluminum-coated steel for corrosion resistance and high-temperature applications. It helps ensure that coatings meet required specifications for durability and service life.
Applications and Benefits of ASTM A428 Aluminum Coating Weight Testing
Scope
ASTM A428 evaluates the coating weight of aluminum-coated iron or steel by chemically removing the coating and measuring the mass difference. The test ensures compliance with coating specifications and uniformity requirements.
The test evaluates:
- Coating weight per unit area
- Uniformity of the aluminum coating
- Effectiveness of coating application
- Surface protection characteristics
- Compliance with coating specifications
Applications
- Aluminum-coated steel sheets and components
- Automotive exhaust systems
- Heat-resistant steel products
- Construction and roofing materials
- Industrial equipment and components
- Quality control in coating processes
Benefits
- Provides accurate measurement of coating weight
- Ensures uniform coating distribution
- Supports the evaluation of corrosion protection
- Assists in process control and coating optimization
- Enables comparison of coating performance
Our ASTM A428 Testing Procedure
Sample Preparation
Coated specimens are cleaned and prepared for testing.
1Coating Removal
Aluminum coating is chemically stripped using a suitable reagent.
2Weight Measurement
Specimens are weighed before and after coating removal.
3Data Recording & Evaluation
Coating weight is calculated per unit area and evaluated against requirements.
4ASTM A428 Test Parameters and Requirements
| Parameter | Details |
|---|---|
| Applicable Materials | Aluminum-coated iron or steel |
| Specimen Area | ~50 cm² to 100 cm² |
| Coating Weight Range | ~20 g/m² to 600 g/m² |
| Stripping Solution | Acidic or alkaline solution (method dependent) |
| Measurement Accuracy | ±1 g/m² |
| Measured Outputs | Coating weight (g/m²) |
- Analytical balance (accuracy ±0.001 g)
- Chemical stripping solutions and containers
- Sample cutting tools
- Drying oven
- Protective laboratory equipment
- Data recording system
Equipment and Instrumentation Used for ASTM A428 Testing
What You Receive: Test Report, Data, and Certification
- Coating weight per unit area (g/m²)
- Coating thickness estimation
- Uniformity assessment of coating
- Compliance with specification requirements
- Test condition summary
- ASTM compliance report
ASTM A428 Aluminum Coating Weight FAQs
ASTM A428 includes coating weight determination, sample preparation, chemical stripping method, measurement accuracy, and coating uniformity, evaluating mass of aluminum coating applied on iron or steel articles under controlled laboratory conditions.
ASTM A428 uses chemical stripping to remove aluminum coating, measuring weight loss to calculate coating mass per unit area on iron or steel substrates.
ASTM A428 is applied to aluminum-coated iron and steel products used in construction, automotive, and industrial applications requiring corrosion-resistant coatings.
ASTM A428 evaluates coating weight per unit area and uniformity, ensuring aluminum coatings meet specified requirements for protection and performance.
ASTM A428 evaluates coating weight under controlled conditions and may not fully represent coating performance in service environments affected by wear, corrosion, or environmental exposure factors.
Why Choose Infinita Lab for Aluminum Coating Weight Testing
When your Aluminum Coating Weight results have to hold up - for compliance, a customer audit, or an engineering decision - ASTM A428 accuracy and an unbiased third-party report matter more than price. Infinita Lab routes your ASTM A428 aluminum coating weight testing to ISO/IEC 17025-accredited U.S. partner labs with hands-on method experience, so you get defensible data, transparent reporting, and turnaround times built around your project deadline - not ours.
Looking for an Accredited Partner for ASTM A428 Aluminum Coating Weight Testing?
Send query us at hello@infinitalab.com or call us at (888) 878-3090 to learn more about our services and how we can support you.
