Salt Spray Test and Standards – Part 1
1. Salt Spray Test The corrosion damage of automobile metal parts has become one of the important reasons for the reduction of automobile life. As early as the 1980s, the annual loss caused by automobile corrosion in the United States was as high as 20 billion dollars. Therefore, both automobile companies and consumers attach great importance to the corrosion of automobile metal parts. Salt spray test is an important means to inspect the corrosion resistance of metal parts. It is usually divided into neutral salt spray (NSS) test, acetate spray (ASS) test, copper accelerated acetate spray (CASS) test, cyclic salt spray test, etc. Neutral salt spray test is to expose the sample to the salt spray box, use the spray device to convert the sodium chloride solution with a mass fraction of about 5% into salt spray, and carry out free settlement, so that the salt spray can fall evenly on the surface of the sample, and accelerate the corrosion of the metal surface by maintaining the...