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ASTM B117 Salt Spray Test: The Gold Standard for Corrosion Testing

What is the ASTM B117 Salt Spray Test? The ASTM B117 salt spray test is an internationally recognized standardized test method, is employed for evaluating the resistance of metallic materials and surface coatings against corrosion. By subjecting test specimens to a controlled saltwater mist environment within a specialized test chamber, the test simulates aggressive corrosion conditions that these materials and coatings may encounter in real-world applications.

Through this meticulous testing process, the ASTM B117 salt spray test provides valuable insights into the durability and longevity of metallic materials and surface coatings under corrosive conditions. By accurately recreating corrosive environments, Such as salt-laden sea air or industrial atmospheres, the test enables manufacturers, engineers, and researchers to assess and compare the corrosion-resistant properties of various materials.

Corrosion is a natural process that affects materials and structures, leading to deterioration, decreased performance, and potential safety hazards. To evaluate the resistance of materials to corrosion, various testing methods have been developed. Among them, the ASTM B117 salt spray test has emerged as the gold standard for corrosion testing. In this article, we will explore the significance, procedure, duration, results, and standards associated with the ASTM B117 salt spray test.

astm b117 salt spray test
Equipment Model TST-NSS-CASS-108L TST-NSS-CASS-270L TST-NSS-CASS-480L
Inside Test Room (mm) 600x450x400 900x600x500 1200x800x500
External Dimension(mm) 1050x600x1180 1400x900x1280 1900x1100x1400
Testing Room Temp Salt test (NSS ACSS)35℃ ±1℃ Corrosion Test (CASS)50℃ ±1℃
Pressure Barrel Temp Salt test (NSS ACSS)47℃±1℃ Corrosion Test (CASS)63℃±1℃
Brine Temperature 35℃ ±1℃, 50℃ ±1℃    
Testing Room Capacity 108 Liters 270 Liters 480 Liters
Brine Tank Capacity 15 Liters 25 Liters 40 Liters
Salt Concentration The concentration of sodium chloride 5% or the 5% concentration of sodium chloride add 0.26g per liter of copper chloride (CuCl2 2H2O)
Air Pressure Supply 1.00 ± 0.01 kgf/cm2 1.00 ± 0.01 kgf/cm2 1.00 ± 0.01 kgf/cm2
Relative Humidity 85% Above 85% Above 85% Above
PH Value Description 6.5~ 7.2 3.0~ 3.2 6.5~ 7.2 3.0~ 3.2 6.5~ 7.2 3.0~ 3.2

The ASTM B117 salt spray test is performed according to the standards set forth by the American Society for Testing and Materials (ASTM). ASTM B117 is the primary standard used for conducting the salt spray test and provides guidelines for the test equipment, specimen preparation, test conditions, evaluation criteria, and reporting of results. Following this standard ensures consistency and allows for meaningful comparisons between different test results.

The ASTM B117 salt spray test is the gold standard for corrosion testing, accurately simulating aggressive corrosion conditions in a controlled environment. Its standardized procedures, duration, and evaluation criteria ensure meaningful and repeatable results. By conducting the salt spray test according to ASTM B117, manufacturers can assess the corrosion resistance of their materials and coatings, leading to improved product quality and enhanced customer satisfaction.

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The test procedure of ASTM B117 involves placing the test specimens inside a chamber, where they are exposed to a continuous mist of a 5% sodium chloride solution at a specific temperature. This temperature typically ranges from 35°C to 50°C (95°F to 122°F). The test specimens are carefully positioned in a manner that ensures uniform exposure to the salt spray. Procedure:
The duration of the ASTM B117 Salt Spray Test varies depending on the requirements of the specific application and the standard being followed. Typically, the test duration ranges from 24 to 168 hours. However, longer durations may be required for more rigorous evaluations. Longer test durations provide more accurate representations of real-world corrosion conditions, enhancing the reliability of the results. Duration:
The results of the ASTM B117 Salt Spray Test are evaluated by assessing the extent and appearance of corrosion on the test specimens following the test period. This evaluation may include visual inspection, such as measuring the width and length of any corroded areas. Additionally, specialized equipment can be utilized to measure the extent of corrosion quantitatively. Results:
corrosion testing lab
The test accurately simulates aggressive corrosion conditions, providing reliable data for evaluating material and coating performance. Testing Accuracy:
The ASTM B117 Salt Spray Test follows a stringent set of guidelines and procedures, ensuring consistency and repeatability in test results. Standardization:
The ASTM B117 Salt Spray Test is widely accepted by industries and regulatory bodies as a reliable method for corrosion testing. Industry Recognition:
Conducting accelerated corrosion testing with the salt spray test can save both time and resources compared to long-term outdoor exposure tests. Cost-Effectiveness:
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