锌是一种带负电性金属。在水溶液中,锌具有较高的负电位,标准电极电位为-0.76伏;在大气条件下,有较好的保护作用。由于锌镀层与基体金属间可构成一定的电化学关系,对基体起防护作用,是典型的阳极镀层。因此,锌镀层被广泛的用于防上黑色金属钢铁部件的腐蚀。然而,在许多工厂和使用单位却常常发 Zinc is a negatively charged metal. In aqueous solution, zinc has a higher negative potential, the standard electrode potential of -0.76 volts; in the atmosphere, has a good protective effect. As the zinc coating and the base metal can form a certain electrochemical relationship between the protective effect on the substrate, is a typical anode coating. Therefore, zinc coating is widely used to prevent the corrosion of ferrous metal steel parts. However, many factories and units are often used