What causes corrosion of chain link fences

What causes corrosion of chain link fences?

         Chain link fence chemical corrosion refers to the corrosion caused by direct chemical reaction between steel and surrounding media. Most corrosion is oxidation, which causes the appearance of lax oxides on the steel. At room temperature, a thin passivation oxide protective film FeO is formed on the appearance of the steel. It is lax and easy to split. Harmful media can enter further and react to cause corrosion. In a dry environment, corrosion develops slowly and the degree of reaction increases with increasing temperature and humidity.

        Chain link fence electrochemical corrosion is caused by the galvanic appearance of gold. Steel itself contains iron, carbon, and other components. Because these components have different electrode potentials, they constitute many microbatteries. In the humid air, a thin water film is adsorbed on the exterior of the steel. The oxygen in the cathode area is reduced to OH due to dissolved oxygen in the water. The two oxides combine to form insoluble Fe (OH) 2, which is further oxidized to loose and easily peelable red-brown rust (OH) 3.