According to the nature of the material, wood is easy to rot, steel is easy to rust, and fiberglass is easy to absorb water and foam. The outer gel coat layer of the yacht's FRP determines the water resistance and corrosion resistance, so when your FRP yacht accidentally scratches the gel coat, it needs to be repaired in time. Don't think that it is as simple as a car's paint drop.
Aluminum is one of the metals that Z is not easy to corrode. The aluminum alloy material used in the ocean is widely used in ships because of its low corrosiveness. Aluminum alloy does not contain steel and iron, so it will not rust. Of course, aluminum will also undergo oxidation, but during the oxidation process, a hard surface layer of aluminum oxide will be produced to prevent the underlying materials from continuing to corrode. If suitable aluminum alloy and welding wire are used, standard construction, and regular maintenance, an aluminum yacht can last for decades.