CCT Chamber

CCT Chamber is a reliability testing device used to test the corrosion resistance of various materials, coatings and surface treatments. It simulates multiple corrosion environments such as salt spray, drying and condensation cycles to evaluate the durability and reliability of products under various corrosion conditions.

The test machine operates on the principle of creating a controlled environment filled with salt-laden mist. This mist is generated by atomizing a saline solution, which is then sprayed onto the test samples. The concentration and temperature of the salt solution, as well as the duration and frequency of spraying, can be precisely adjusted to mimic different real-world scenarios.

There are many types of CCT Chambers, each with its specific application scenarios and technical parameters. Neutral salt spray corrosion test chambers and acidic salt spray corrosion test chambers are used for different corrosion testing needs. Neutral salt spray corrosion test chambers are usually used to simulate corrosion conditions in marine or industrial environments, while acidic salt spray corrosion test chambers are suitable for more stringent corrosion testing environments.

ISO 9227-2017, DIN50021,ISO1456-74,ISO3768-78,ASTM B117, GB/T2423.17-2008,GB/T2423.18-2008,GB/T31467.3,SAEJ2334-2016, GB/T10587-2006,GJB150.11-1986,GJB150.9-1986,GB/T10125-1997,GB/T5170.8-1996, JIS And other test Methods designed and manufactured

Salt spray tests are divided into two categories: one is the natural environment exposure test, and the other is the artificial accelerated simulated salt spray environment test.
The artificial simulated salt spray environment test uses a test equipment with a certain volume space - the Singleton Salt Spray Chamber, to create a salt spray environment in its volume space by artificial methods to assess the salt spray corrosion resistance of the product.
Compared with the natural environment, the salt concentration of chloride in its salt spray environment can be several times or dozens of times that of the general natural environment salt spray content, which greatly increases the corrosion rate and greatly shortens the time to obtain the results of the product salt spray test.
For example, if a product sample is tested in a natural exposure environment, it may take 1 year for it to corrode, but in an artificial simulated salt spray environment, it only takes 24 hours to get similar results.
Artificial simulated salt spray tests include: neutral salt spray test, acetate spray test, copper salt accelerated acetate spray test, and alternating salt spray test.

(1) Neutral salt spray test (NSS test)
It is the earliest accelerated corrosion test method with the widest application field. It uses a 5% sodium chloride salt solution with a pH value adjusted to a neutral range (6-7) as a spray solution. The test temperature is 35°C, and the salt spray sedimentation rate is required to be between 1 and 2 ml/80 cm².h.

(2) Acetic acid salt spray test (ASS test)
It is developed on the basis of the neutral salt spray test. It is to add some glacial acetic acid to the 5% sodium chloride solution to reduce the pH value of the solution to about 3, so that the solution becomes acidic, and the salt spray formed at last also changes from neutral salt spray to acidic. Its corrosion rate is about 3 times faster than that of the NSS test.

(3) Copper salt accelerated acetic acid salt spray test (CASS test)
It is a rapid salt spray corrosion test recently developed abroad. The test temperature is 50°C. A small amount of copper salt-copper chloride is added to the salt solution to strongly induce corrosion. Its corrosion rate is about 8 times that of the NSS test.

In summary, the specific time conversion is:

Neutral salt spray test 24h ⇌ natural environment 1 year

Acetic acid salt spray test 24h ⇌ natural environment 3 years

Copper salt accelerated acetic acid salt spray test 24h ⇌ natural environment 8 years

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