I. Mechanical performance indicators
The first is the mechanical properties of hot dip galvanized products. Mechanical properties can be defined as product properties that can be confirmed by tensile test, such as yield strength, tensile strength, elongation, n value, r value and so on.Second, the coating performance indexThe most important performance of hot dip galvanized products is the coating performance, which mainly refers to the corrosion resistance and adhesion of the coating. Corrosion resistance includes salt spray resistance and moisture resistance, and coating adhesion refers to the product's resistance to coating cracking, peeling and pulverization during processing.Three requirements of performance index of galvanized coil plateThird, other performance indicatorsNone of the tests can match the actual use situation very well. Other important properties are surface quality, such as the surface quality of automobile exterior panels and household appliances exterior panels. For the automobile industry, the surface roughness control of steel plate is also very important. For the definition of surface quality, a few words can't completely explain it. The best thing is not to use it directly in different use processes, but to verify it first. In addition, there are some explanations, such as trimming and non-trimming for alloyed products or common hot dip galvanized products, and micro-zinc layer cracks and white edges are allowed at the edges of non-trimmed strip steel.