How to conduct a neutral salt spray test? What are the standards?

Neutral salt spray test is a commonly used environmental testing method to evaluate the corrosion resistance of materials in saltwater atomization environments. This type of experiment is crucial for many industries, especially those involving metals, coatings, and surface treatments. It is crucial to follow standardized operating methods and evaluation criteria when conducting neutral salt spray tests.

This type of testing is commonly used in fields such as metals, coatings, electroplating, anti-corrosion coatings, automotive components, aerospace components, etc. During the neutral salt spray test, the sample is placed in the testing room, and the saline solution is sprayed or atomized to form a salt spray environment. Then, the sample is continuously exposed to a certain temperature for a period of time, usually measured in hours or days.

The key to this test is to ensure the stability and repeatability of the testing conditions in order to obtain accurate results. The testing time and temperature can be adjusted according to the required testing standards and actual application environment.

The results of neutral salt spray testing are usually evaluated by observing the degree of corrosion of the sample, the type of corrosion that occurs (such as white rust, red rust, etc.), and the degree of corrosion to evaluate the performance of the sample. These data can help manufacturers evaluate the durability of materials or coatings, and optimize product design and material selection. How is the neutral salt spray test charged? The fee for neutral salt spray testing is usually determined based on various factors, including but not limited to the following:

1. Sample quantity and size: The testing cost is usually related to the number and size of the tested samples. More samples mean more testing time and resources, which may affect testing costs.

2. Testing standards and requirements: Different industries and application fields may have different testing standards and requirements. Some standards may require stricter testing conditions and longer testing cycles, which may affect testing costs.

3. Testing cycle: The length of the testing cycle can also affect the testing cost. Usually, a longer testing cycle may result in higher costs as it requires more resources and equipment usage time.

The following are some common neutral salt spray test standards:

1. ASTM B117-16: This is a standard published by the American Society for Testing and Materials (ASTM), which describes the operating methods and evaluation criteria for neutral salt spray testing.

2. ISO 9227: This is a standard issued by the International Organization for Standardization (ISO), which describes the conditions and testing procedures of salt spray testing chambers.

3. GB/T 10125-2012: This is a Chinese national standard that specifies the method and evaluation of neutral salt spray testing.

4. JIS Z 2371: This is a Japanese industrial standard used for neutral salt spray testing.

These standards typically include requirements for testing equipment, testing conditions, testing cycles, evaluation criteria, and sample preparation methods. The selection of appropriate standards depends on your industry and region to ensure the accuracy and comparability of testing. It is recommended to follow applicable standards when conducting neutral salt spray tests to obtain reliable results.