The Analysis for the Contrast of Salt Fog Test of Typical Nonmetallic Material with GJB150 and GJB50A

GJB150 has been the main criterion for the environmental adaptability design in China since its publication. In 2009, GJB150A was released as an alternative criterion for GJB150. The method of salt fog test of GJB150A is different from GJB150. The spray method in GJB150A is alternate and the spray method in GJB150 is continuous. In order to compare the difference of the corrosion degree for typical non-metallic materials of the two test methods, the paper chose the material of typical and representative rubber of organic polymer and PCB specimens coated with different organic coatings and the test applied GJB150 and GJB150A respectively. The results of two tests were compared and analyzed and it demonstrated that salt fog test in GJB150A has higher corrosion degree when applied to rubber and PCB coated with organic coating. At the same time, rubber and acrylic coatings are less susceptible to salt spray corrosion.