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ASTM B117 is a standardized test method used to evaluate the corrosion resistance of materials and coatings by exposing them to a controlled salt spray (fog) environment. This test is widely used to simulate and accelerate the effects of corrosive environments, helping ensure the durability and longevity of products.
While called out as the test, ASTM B117 is a method specification that outlines the standard practice for operating salt spray (fog) apparatus. To gain knowledge about corrosion it needs to be teamed up with other test methods such as:
The primary purpose of the ASTM B117 and the evaluations methods is to assess the corrosion resistance of materials and protective coatings. It provides a consistent and reproducible environment to compare the performance of different materials under accelerated corrosive conditions.
ACT's ASTM B117 testing services are conducted in ISO/IEC 17025:2017-accredited laboratories, ensuring high standards of accuracy and reliability.
ACT's Lab Project Team can help customers choose the correct evaluation methods, sample or part size and sample set.
The testing includes detailed evaluations of corrosion resistance, identifying defects such as cracks, pinholes, and adhesion failures.
ACT tailors the test parameters based on the specific needs of the client, including the type of material, coating, and intended application.
Clients need the ASTM B117 test to ensure their products can withstand corrosive environments, which is crucial for maintaining product quality and safety. This test is particularly important for industries where materials are exposed to harsh conditions, such as automotive, aerospace, marine, agricultural, and industrial equipment sectors.
The results of the ASTM B117 test typically include visual assessments of corrosion, such as the appearance of rust or other oxides. The test duration can vary, with longer tests indicating higher corrosion resistance. The results help manufacturers make informed decisions about material selection and protective coatings.
The ASTM B117 test can be combined with other tests, such as ASTM D1654 for evaluating painted or coated specimens and ASTM D3359 for assessing adhesion. Combining tests provides a more comprehensive understanding of a material's performance under various conditions.
Secondary tests recommended with ASTM B117 include ASTM D610 for assessing the degree of rusting on painted steel surfaces and ASTM D714 for evaluating blistering. These follow-up tests help further quantify the material's resistance to corrosion and other environmental factors.
ASTM B117 is a test method specification that outlines the standard practice for operating salt spray (fog) apparatus.
The test establishes parameters such as the concentration of the salt solution (5% NaCl), temperature (35°C), and pH range (6.5–7.2). These conditions ensure consistency and reproducibility across different testing environments.
ASTM B117 does not specify the type of test specimen, dimensions, or exposure periods for specific products. These details are determined based on the specific requirements of the material or product being tested.
The test conditions include maintaining a constant temperature of 35°C, using a 5% NaCl solution, and ensuring a neutral pH range. The specimens are typically exposed for durations ranging from 96 to 600 hours, depending on the desired level of corrosion resistance assessment.
The ASTM B117 test may not be ideal for predicting real-world corrosion performance in all environments, as it provides an accelerated and controlled corrosive environment that may not replicate all natural conditions.
Automotive: Evaluating the corrosion resistance of vehicle components and coatings.
Aerospace: Ensuring the durability of aircraft materials and protective coatings.
Military: Testing the corrosion resistance of equipment and materials used in harsh environments.
Marine: Assessing the performance of materials exposed to saltwater conditions.
Agricultural and Industrial Equipment: Ensuring the durability of machinery and components used in demanding environments.
The test uses a 5% sodium chloride (NaCl) solution to create the salt fog environment.
ACT uses state-of-the-art salt spray chambers that comply with ASTM B117 specifications. These chambers maintain the required temperature, humidity, and salt concentration to ensure accurate and reproducible results.
Here are some common questions about the ASTM B117 test:
You will need to provide details about the material or coating being tested, including its composition, intended application, and any specific test parameters or conditions you require. This helps the laboratory tailor the test to your specific needs.
The ideal sample size can vary depending on the material and the specific requirements of the test. Generally, multiple samples are recommended to ensure accurate and reproducible results. The size and shape of the samples should be representative of the actual product.
The duration of the ASTM B117 test can range from 24 to over 1,000 hours, depending on the material's corrosion resistance and the specific requirements of the test. Longer test durations typically indicate higher corrosion resistance.
No, there are several other corrosion tests available, such as ASTM G85 (Modified Salt Spray Test), ISO 9227 (Salt Spray Test), and ASTM D5894 (Cyclic Salt Fog/UV Exposure Test). Each test has its own specific applications and advantages.
Acceptance criteria for the ASTM B117 test are typically defined by specific industry standards or customer requirements. These criteria may include the maximum allowable corrosion, rust, or other defects observed on the test specimens.
