ASTM B117, G85 & ASTM 8117: Which Corrosion Test Standard Do You Need?
ASTM B117, G85 & ASTM 8117: Which Corrosion Test Standard Do You Need?
When evaluating corrosion resistance for metal parts, coatings and fasteners, ASTM B117, ASTM G85 and ASTM 8117 are three of the most widely used international test standards. Each standard simulates different environmental conditions and serves distinct testing purposes. Understanding their differences helps you select the most suitable corrosion test chamber for your product and industry requirements.
1. ASTM B117-07 – Neutral Salt Spray (NSS) Test
ASTM B117 is the most basic and widely applied salt spray test standard. It establishes a continuous neutral salt spray environment to assess the corrosion resistance of painted parts, plated components, and various metal materials.
This test is commonly used for:
- Coating quality inspection
- Plating performance verification
- General corrosion comparison testing
- Incoming and outgoing factory quality control
2. ASTM G85 – Cyclic & Modified Salt Spray Tests
ASTM G85 is not a single test but a series of cyclic and acidified salt spray test procedures. Compared to ASTM B117, it better simulates real-world service conditions by introducing drying, humidity, and acidified environments.
Typical applications include:
- Automotive components
- Outdoor hardware and fasteners
- Electrical connectors
- Parts exposed to complex corrosive environments
3. ASTM 8117 – Cyclic Corrosion Testing (CCT)
ASTM 8117 focuses on cyclic corrosion testing that combines salt spray, humidity, drying, and temperature changes. It is widely adopted in the automotive industry to replicate harsh outdoor and road conditions more realistically.
It is widely used for testing:
- Chassis and underbody parts
- Fasteners and brackets
- Brake system components
- Outdoor enclosures and electrical parts
Which Standard Should You Choose?
For general coating and plating verification, ASTM B117 is sufficient.
For automotive, outdoor, and high-reliability applications, ASTM G85 and ASTM 8117 provide more accurate and practical results.
ITM-LAB Corrosion Test Chambers
ITM-LAB designs and manufactures salt spray and cyclic corrosion test chambers that fully meet ASTM B117, G85, and ASTM 8117 requirements. Our equipment delivers stable performance, precise control, and reliable test data for laboratories and manufacturers worldwide.
Key features include:
- Precise temperature and spray volume control
- Stable and repeatable test results
- User-friendly operation and program settings
- CE certified and heavy-duty construction
- Custom sizes and configurations available
Need a Suitable Corrosion Test Chamber?
Not sure which chamber matches your ASTM test requirements?
Contact our technical team today for a free quote and customized testing solution.
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