Why does Lemon Juice rust faster?

Lemon juice actually slows down the rusting process.

Rusting is an electrochemical process that requires the presence of oxygen and water. This is usually caused by the metal coming into contact with oxygen and moisture in the air. Lemon juice contains citric acid, which is a mild organic acid. This acid creates an acidic environment that inhibits the formation of rust.

In addition, the citric acid in lemon juice also helps to dissolve any existing rust. This makes it a great natural cleaning agent for removing rust from metal surfaces.