Determination of salt spray resistance of colours and varnishes

Salt spray corrosion is the common and most destructive atmospheric corrosion. Salt spray test is an environmental test that mainly uses artificial simulated salt spray environmental conditions created by Standard Salt Spray Test Machine to evaluate the corrosion resistance of products or metal materials.

 

Salt spray test is divided into two categories: 1. Natural environment exposure test, 2. Artificial accelerated simulated salt spray environment test.

 

The artificial simulated salt spray environment test is to use a test equipment "salt spray test box" with a certain volume space, and artificially create a salt spray environment in its volume space to evaluate the salt spray corrosion resistance performance and quality of the product. Compared with the natural environment, the salt concentration of chloride in the salt spray environment can be several times or dozens of times that of the general natural environment, which greatly increases the corrosion rate. The salt spray test is carried out on the product to obtain the result. time is also greatly shortened. Salt spray corrosion test chamber is the experimental equipment for salt spray test, which can be provided by Standard Group (Hong Kong) Co., Ltd.

 

The relationship between the salt spray test and the actual situation

 

Under normal circumstances, the salt spray test time and the degree of protection of the paint film to the substrate (in an environment where the temperature is -25~55°C, the relative humidity is 40%~90%, and there is no salt water and corrosive substances) exist for a while. Relationship:

 

1. The NSS salt spray test for 4 hours can ensure that the paint film protects the substrate under the same environmental conditions for 2 months;

 

2. The NSS salt spray test for 8 hours can ensure the same environmental conditions that the paint film protects the substrate for 4 months;

 

3. The NNS salt spray test for 12 hours can ensure the same environmental conditions for the paint film to protect the substrate for 6 months;

 

4. The NNS salt spray test for 24 hours can ensure the same environmental conditions that the paint film protects the substrate for storage for 12 months.

 

Standard Group (Hong Kong) Co., Ltd. is a manufacturer of Standard Salt Spray Test Machine with many years of experience. Customers have a good reputation. If you have friends who want to buy, please leave us a message!