The materials of fitness equipment include metal and plastic. The metal structure of the inner layer plays the role of supporting strength, and the structural strength of fitness equipment is reflected by metal parts. External plastic or plastic plays a certain protective and aesthetic role.

Theoretically, plastics or plastics are not easily corroded by rain. They are more likely to change their properties and become brittle and cracked in the sun.

As for the metal structure of fitness equipment, it is very vulnerable to rain corrosion. ..... Pure water is not very corrosive. However, rainwater is mixed with a large number of acidic or alkaline chemicals, which is very corrosive to metal parts. In particular, fitness equipment mostly uses steel and metal components. After steel is corroded, the surface cannot form a protective layer, so the corrosion will continue to spread to the inner layer, forming more serious corrosion.

So fitness equipment is corroded and rusted by rain, and it is everywhere. ..... So the fitness equipment needs regular maintenance.