Impact screwdriver bit,25mm screwdriver bit,screwdriver bit supplier,torsion screwdriver bit,professional screwdriver bit
henan horn tools co.,ltd. , https://www.nbhorntoolsltd.com
Shanghai coating salt spray corrosion test
Shanghai Coating Salt Spray Corrosion Test Shimin Mobile QQ Email @qq.com Test Significance and Method: In order to understand the protective performance of the coating on the surface of the workpiece as soon as possible, the corrosion resistance of the coating is usually tested by accelerated corrosion. A method for enhanced corrosion testing of coatings that is more typical than normal natural corrosive environments, such as salt spray tests, including neutral salt spray tests, acetate spray tests, and copper salt accelerated salt spray tests. . In addition to the salt spray test, there are salt water impregnation method, artificial sweat test method, gas corrosion method, corrosion mud test method and the like. Test requirements: For example, the nickel plating layer is an cathodic coating layer, and there is no electrochemical protection. When the coating layer has pores, the substrate will be first corroded, so that only the plating layer can protect the pores without being dense. The thinner the coating, the higher the porosity. To ensure the corrosion resistance of the nickel coating, the coating should generally reach 20um or more. Main test items: Mechanical performance test Metallographic test chemical composition test Coating test size test Non-destructive testing salt spray test and other weathering tests, decarburization test, etc. The scope of the mechanical test: tensile test, tensile test, bending test, impact test, low temperature impact test, impact test, hardness test and so on. Jiangsu Anjiewen Testing has CNAS\CMA national accreditation qualification, professional testing, authoritative report, welcome to consult! Http://news.chinawj.com.cn