This test procedure serves as a general purpose atmospheric corrosion test and can be applied to a wide variety of materials, coatings and interactions of materials.

It has been developed to allow the evaluation of the corrosion resistance of metals used in vehicle bodies where there is a significant influence of chloride ions, mainly as sodium chloride from winter road de-icing salt. This test is cyclic in nature, i.e.; test specimens are exposed to changing climates over time.

Test specimens are placed in an enclosed chamber and exposed to a changing climate.

Method A comprises 17 hours saltwater spraying, 3 hours forced drying, 2 hours saltwater dipping and finally 2 hours natural drying.

方法A 鹽霧噴霧（17H）→ 強制干燥（3H）→ 鹽水浸泡（2H）→ 自然干燥（2H）  

Method B comprises 1 hour saltwater spraying, 16 hours wetting, 4.5 hours forced drying, 1 hour saltwater dipping and finally 1,5 hours natural drying.

方法B 鹽霧噴霧（1H）→潤濕（16）→強制干燥（4.5H）→鹽水浸泡（1H）→自然干燥（1.5H） 

Method C comprises 4 hours saltwater spraying, 5 hours forced drying, 12 hours wetting, 2 hours forced drying and finally 1 hour natural drying.

方法C 鹽霧噴霧（4H）→強制干燥（5H）→潤濕（12H）→強制干燥（2H）→自然干燥（1H） 

The number of cycle repeats and therefore the test duration is variable.

This test is also referred to as a Cyclic Corrosion Test, often abbreviated to CCT.
方法A、B、C均可以設(shè)定循環(huán)

TSH1555G交變循環(huán)腐蝕復(fù)合鹽霧試驗機滿足如下測試條件：

1、鹽霧試驗 

2、鹽水浸泡 

3、強制干燥 

4、自然干燥 

5、潤濕試驗