ASTM B117 salt spray test is a common corrosion test method that is widely used in the evaluation and comparison of metals and coating materials. This test evaluates the corrosion resistance of materials in harsh environments by simulating salt spray corrosion conditions in real environments. The purpose of the ASTM B117 salt spray test will be introduced in detail below.

1. Evaluate the corrosion properties of materials:

The main purpose of the ASTM B117 salt spray test is to evaluate the corrosion properties of materials. During actual use, metal products and coating materials may be exposed to marine environments containing chlorides, industrial gases, chemical reagents, etc., resulting in corrosion. By conducting salt spray tests, these corrosive environments can be simulated, the corrosion process of materials can be accelerated, and the corrosion resistance of materials can be evaluated.

2. Compare the corrosion resistance of different materials and coatings:

The ASTM B117 salt spray test can also be used to compare the corrosion resistance of different materials and coatings. The corrosion resistance of different materials and coatings may vary. By exposing them to the same salt spray corrosion environment for testing, their corrosion levels can be visually compared, thereby selecting materials and coatings with better corrosion resistance. .

3. Evaluate the effectiveness of coatings and anti-corrosion treatments:

Metal products that require corrosion resistance, such as auto parts, ship structures, etc., are often coated or treated with anti-corrosion treatments. The ASTM B117 salt spray test can be used to evaluate the effectiveness of these coatings and anti-corrosion treatments. By exposing coated or anti-corrosion treated samples to a salt spray environment, the adhesion, coverage, corrosion resistance and other indicators of the coating can be observed to judge the quality and durability of the coating and anti-corrosion treatment.

4. Verify that the product complies with relevant standards:

ASTM B117 salt spray test is a widely accepted international standard test method, and many industries and standards organizations use it as the basis for product quality control and certification. By conducting salt spray tests, you can verify whether the product meets the corrosion performance requirements of relevant standards, thereby ensuring product quality and reliability.

Summarize:

The main purpose of the ASTM B117 salt spray test is to evaluate the corrosion performance of materials, compare the corrosion resistance of different materials and coatings, evaluate the effectiveness of coatings and anti-corrosion treatments, and verify whether products comply with relevant standards. Through this test, reliable corrosion performance data can be provided, providing a scientific basis for material selection, coating design and product quality control.