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The difference between black zinc screws and colored zinc screws

The difference between black zinc screws and colored zinc screws

There are many kinds of screw colors, of which black zinc screws and color zinc screws are also common screw colors in our lives, so what is the difference between black zinc screws and color zinc screws?
First, the color of black zinc screws is after hot dip galvanizing and then black oxidation treatment, the surface color is black; The color zinc screws are first through hot dip galvanizing, and then through the coating of the coating machine or powder spraying of different colors of the treatment process, the surface color has red, orange, yellow, green, blue, purple and other different choices.
Black zinc screws and color zinc screws are hot-dip galvanized treatment, with good anti-corrosion properties. However, because the color zinc screw also has organic coating or powder coating, its corrosion resistance is better, and it can better resist the erosion of external corrosion factors.
Black zinc screws are mainly used in situations where the surface color is not changed, but the corrosion resistance is required at the same time, such as mechanical equipment and sheet metal connection. Color zinc screws are mainly used for occasions with high color requirements, smooth surface requirements and good anti-corrosion performance, such as plates, steel structure buildings, ships, communication equipment and so on.
In summary, although black zinc screws and color zinc screws have been hot-dip galvanized treatment, there are differences in color, anti-corrosion performance, application scenarios and so on. Therefore, when selecting and using screws, it should be judged and selected according to the actual situation.