The salt spray test standard is an environmental test for evaluating the corrosion resistance of fastener products or materials by artificially simulating the marine environmental conditions in a salt spray test chamber. It is a widely used environmental test method in the fastener industry. China's GB / T10125-1997 "Salt Spray Test for Artificial Atmosphere Corrosion Test" is applicable to the neutral salt spray test (NSS) of metal and its gold, metal coating, organic coating, anodized film and conversion film; it is suitable for the same + Nickel + chromium or nickel + chromium decorative coating, aluminum anodized film (AASS) and copper accelerated acetate spray test (CASS). The salt spray test standard ISO9007: 2006 pointed out that the long-term performance of different coatings from the comparison results of the salt spray test is often not feasible, because the actual corrosion stress is completely different from the corrosion stress of the test. The salt spray test chamber is suitable for metal The performance comparison of materials with or without corrosion protection is not suitable for ranking different materials with regard to corrosion resistance. The salt spray test standard ISO9227: 2006 has also been changed and adjusted in other contents that have an important influence on the test report results. For example, the volume of the salt spray test box is changed from a minimum of 0.2m3 to a test of less than 0.4m3, and specific requirements are made for the temperature of the saturation barrel. The angle of the test piece is adjusted from 15 degrees to 30 degrees to 5 degrees to 25 degrees ; For the salt spray test chamber has been used in other solutions different from NSS, emphasized that it can not be used for NSS test, once such a situation occurs, the corrosion performance of the salt spray test chamber must be re-evaluated after thorough cleaning.
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Test content and influence of salt spray test chamber