ASTM B117 testing: the specifications that decide the fit

The Salt Spray Tester (TNG1124) is designed to meet the requirements of ASTM B117, ensuring accurate and repeatable corrosion testing in controlled environments.

Understanding Specification Tables for ASTM B117 Compliance

When reviewing a specification table for a Salt Spray Tester, it is essential to identify key parameters that align with the ASTM B117 standard. One critical specification is the Test chamber volume, which directly influences the uniformity of salt spray distribution. For example, the TNG1124 model offers a test chamber of 108 L or 270 L. This volume ensures that the salt spray is evenly distributed across the test samples, which is crucial for achieving consistent results as required by ASTM B117. A larger chamber volume can accommodate more samples, making it suitable for high-throughput testing environments.

Another important specification is the Test solution volume, which determines the amount of saltwater used in the test. The TNG1124 has a test solution volume of 15 L, which is sufficient to maintain a stable salt concentration throughout the test duration. This ensures that the salt concentration remains within the specified range, which is vital for the accuracy of the corrosion test results. The test solution volume must be adequate to prevent dilution and maintain the required salt concentration, as outlined in the ASTM B117 standard.

Temperature Control and Its Impact on Test Accuracy

Temperature control is a fundamental aspect of salt spray testing, as it affects the rate of corrosion and the overall test outcome. The TNG1124 model provides NSS.ACSS 35℃±1℃ for the Temp. test and NSS.ACSS 47℃±1℃ for the Temp. air. These temperature settings are specifically designed to simulate the conditions of the standard salt spray test, ensuring that the test environment is consistent and reproducible. The precise temperature control helps in maintaining the correct conditions for the corrosion process, which is essential for meeting the requirements of ASTM B117.

The Interior dim. and External dim. of the TNG1124 model are also important specifications that affect the test setup. The interior dimensions of 600x450x400 mm or 900 x600x500mm and the external dimensions of 1060X570X1060 mm or 1420 x 980X1285 mm ensure that the test chamber is appropriately sized to accommodate the test samples and the necessary equipment. These dimensions are crucial for ensuring that the test samples are fully exposed to the salt spray and that the test environment is properly controlled.

Ensuring Compliance with ASTM B117 Through Specification Verification

To support testing to ASTM B117, it is essential to verify that the specifications of the Salt Spray Tester are aligned with the standard requirements. The TNG1124 model's specifications, such as the test chamber volume, test solution volume, temperature control, and dimensions, are all designed to meet the stringent requirements of the standard. By carefully reviewing and verifying these specifications, users can ensure that their testing procedures are accurate and reliable, thus meeting the necessary standards for corrosion testing.

Instrument models referenced

• TNG1124 Salt Spray Tester (Others). Published specifications include Test chamber: 108 L or 270 L; Test solution volume: 15 L; Temp. test: NSS.ACSS 35℃±1℃, optional CASS 50℃±1℃.