ASTM B117 is the standard practice for operating salt spray (fog) apparatus, providing a common framework for running corrosion-related exposure tests under controlled fog conditions. It helps users apply a consistent test method when evaluating materials, coatings, and finished products in a salt spray environment. By defining how the apparatus is operated, this ASTM standard supports repeatable results, clearer comparisons, and more dependable quality and performance assessment.

What is ASTM B117?

ASTM B117, titled Standard Practice for Operating Salt Spray (Fog) Apparatus, describes how to operate equipment used for salt spray exposure testing. The focus is on the practice of running the apparatus rather than on a product specification. In practical terms, it gives laboratories and manufacturers a recognized basis for conducting controlled corrosion testing. This makes ASTM B117 useful for establishing consistent test conditions and supporting reliable comparison of results across different test programs.

Where is ASTM B117 used?

This standard is commonly used in laboratories, quality control environments, and product validation workflows where salt spray apparatus is operated for exposure testing. It is often relevant when evaluating coated parts, plated surfaces, or other materials that may be affected by corrosive environments. ASTM B117 is also used in technical testing programs that require a recognized operating practice for fog cabinets and similar equipment, helping ensure the test setup follows a consistent method.

Why is ASTM B117 important?

ASTM B117 matters because consistent operating practices improve the usefulness of salt spray test results. When the apparatus is run in a controlled and repeatable way, organizations can better compare samples, support procurement decisions, and document product performance. It also helps reduce ambiguity in testing requirements and can strengthen compliance efforts when corrosion exposure testing is part of a quality or engineering program. For many users, ASTM B117 is a practical reference for dependable test execution.

• Operating practice for salt spray (fog) apparatus
• Supports controlled corrosion exposure testing
• Useful for repeatable laboratory procedures
• Helps compare materials and coatings consistently
• Common reference for quality and compliance workflows