When the iron of the steel got rust it will be gust up and leave the metal to the open surface which allow rust to get deep into the metal. This cause you favorite and most valuable tools rusting and needed to stop or at least prevent it. There are few techniques and methods that commonly applied to them. One of the methods is Electrolytic Rust Removing. It is by engraving off the metal in the mild alkali like sodium carbonate empowering them with electric rod. This method got many advantage like alkali solution works safer then the acidic method. When you are doing it, you need to wear rubber gloves and goggles.
Secondly this method doesn't affect the surface pf the metal and it will remain as it was before rust. This will convert the iron oxide into black oxide and doesn't damage the surface at all. If you want to have the original metal back then the most favorable technique. Another is from the Knorrostol which is bit expensive method but it will safely remove the rust and leave no marks or any damage to the surface. It's basically a polish with smooth the surface very quickly.
Removing the rust from the old cars and motorcycle is by using chrome, this is done by rubbing the aluminum bar to the surface. This will peel off the iron oxide and at the same time will penetrate deep into the metal to form aluminum oxide instead of the iron oxide.
Hence, there are few people that have repute of rusting everything that they grasp. Usually these people have very different body oil. When they grapes you tools it get moisturized and leaving behind rust after some time. So be careful by letting them handle the tools.
Engraving the metal surface with the Phosphoric Acid is also rust removing technique. It has the ability to dissolved iron oxide quickly while engraving iron slowly. This required metal to dip into the acid for longer than usual time but at cost of the little damage. An other property of the acid is that it coated the metal with iron phosphate. However this thick layer of iron phosphate is not durable additional protection needed.
