Corrosion: The slowly eating of the surface of some metals, such as iron when they are exposed to moist air for a long period of time is known as corrosion.
Gold:
Gold is a yellow precious metal with a chemical element of atomic number 79.
Gold is a bright, slightly orange-yellow, dense, soft, malleable and ductile metal in a pure form.
Gold does not get corroded:
Gold does not get corroded because it is one of the least reactive metals in the reactivity series and it does not react with air or moisture easily.
Gold does not get affected by oxygen and most acids.
Gold is more stable than any other compounds such as sulfides or oxides.
Due to the less reactive nature of Gold, it is known as a noble metal.