Corrosion testing

Salt spray test

A salt spray test is a standardised accelerated corrosion test to evaluate the corrosion resistance of materials and surface coatings. The method is primarily used for quality acceptance and comparison between materials and/or coatings.

During the test, the material is placed in a closed temperature controlled chamber with a constant fog created from salt water. All tests are executed following the ASTM B117 standard.

An example of a test performed in the research group is shown on the images. Four steel plates were aluminised and subsequently tested for their corrosion resistance. The images are taken before and after salt spray testing. Scratches can be applied into the steel substrate to study the protective properties of a surface coating after damage has taken place.

Zoutnevel Initieel Zoutnevel Finaal

Four aluminised steel plates with an Andreas cross before (left) and after (right) salt spray testing