ASTM D6943: Immersion Corrosion Testing Services
Immersion Testing of Protective coating is carried out by this method ASTM D6943-10.To protect the substrate from corrosive attacks and stored material from contamination protective coatings are used. It is applied on Metallic, Concrete, containers, dams, rail cars etc.
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- Overview
- Scope, Applications, and Benefits
- Test Process
- Specifications
- Instrumentation
- Results and Deliverables
What Is ASTM D6943 Immersion Corrosion?
ASTM D6943-10 is a test method standard for determining the resistance of industrial protective coatings to chemical immersion.
This technique evaluates the coating’s performance in controlled-temperature, controlled-pressure environments to assess its resistance and protective properties. This test can predict the coating’s performance in real-world industrial settings, such as chemical plants, marine structures, and pipelines.
Applications and Benefits of ASTM D6943 Immersion Corrosion Testing
Scope
ASTM D6943-10 evaluates:
- Resistance of protective coatings to chemical immersion
- Performance under constant temperature conditions
- Performance under temperature gradients
- Performance under elevated pressure
- Coating degradation and failure mechanisms
- Changes in immersion media
The method applies to industrial coatings used for corrosion protection.
Applications
- Chemical processing equipment
- Oil and gas pipelines
- Marine and offshore structures
- Storage tanks
- Industrial plant coatings
- Water treatment facilities
- Infrastructure protection
- Research and development
Benefits
- Provides standardized immersion testing procedures
- Simulates real service conditions
- Helps select suitable coatings for harsh environments
- Supports quality assurance programs
- Predicts long-term coating performance
- Identifies chemical compatibility
- Improves coating reliability
Our ASTM D6943 Testing Procedure
Specimen Preparation
Carbon steel panels are coated and cured in accordance with the specification.
1Exposure Testing (Methods A, B, & C)
Specimens are exposed under selected conditions: constant temperature, thermal gradient, or increased pressure.
2Chemical Immersion
Panels are immersed in selected chemicals for a defined duration.
3Observation & Evaluation
Visual inspection and media analysis are performed after exposure.
4ASTM D6943 Test Parameters and Requirements
| Parameter | Details |
|---|---|
| Applicable Materials | Industrial protective coatings |
| Specimen Size | 50 × 100 mm (2 × 4 in.) |
| Minimum Thickness | 3 mm (1/8 in.) |
| Test Methods | Method A, B1, B2, C |
| Temperature Conditions | Constant or gradient |
| Pressure Conditions | Atmospheric or elevated |
| Measured Outputs | Visual changes and media condition |
- Chemical immersion test vessels
- Temperature-controlled baths
- Pressure vessels (for Method C)
- Thermometers/temperature sensors
- pH meter
- Visual inspection tools
- Data recording system
Equipment and Instrumentation Used for ASTM D6943 Testing
What You Receive: Test Report, Data, and Certification
- Visual condition of coating
- Changes in coating appearance
- Color changes in the immersion medium
- Turbidity observations
- Precipitate formation
- pH variation data
- Performance comparison reports
- Quality assurance documentation
ASTM D6943 Immersion Corrosion FAQs
ASTM D6943 evaluates the resistance of industrial protective coatings and linings to chemical immersion. It helps determine whether a coating can maintain its protective properties when exposed continuously or intermittently to corrosive chemicals or fluids.
The practice is applicable to industrial protective coatings and linings used on substrates such as metallic and concrete vessels, storage tanks, processing equipment, shipping containers, and other structures exposed to immersion environments.
ASTM D6943 provides three approaches: Method A uses constant temperature at atmospheric pressure, Method B introduces a temperature gradient across the specimen, and Method C uses constant temperature with increased pressure. The appropriate approach depends on the intended service conditions.
Evaluation is primarily based on visual observations of coating degradation and its ability to protect the underlying substrate. Depending on the agreement between the parties, additional measurements such as changes in coating weight, dimensions, or chemical changes in the immersion fluid may also be assessed.
ASTM D6943 helps determine whether a coating or lining is fit for service in chemical immersion environments. The results can support coating selection, formulation development, quality control, qualification, and evaluation of coatings intended to protect metallic or concrete substrates from chemical attack.
Why Choose Infinita Lab for Immersion Corrosion Testing?
At the core of this breadth is our network of 2,000+ accredited laboratories across the USA, offering access to over 10,000 testing methods and analytical services. From advanced materials characterization (SEM, TEM, RBS, XPS) to mechanical, chemical, environmental, biological, and standardized ASTM/ISO-compliant testing, we deliver unmatched flexibility, specialization, and scale. You are never limited by geography, facility, or methodology — Infinita Lab connects you to the right expertise and testing solution, every time.
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