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sciencing.com/rust-form-4564062.html

Rust is a naturally occurring phenomenon when certain metals are exposed to oxygen and water for a length of time. The actual chemical make-up of rust is 4Fe + 3O2 = 2Fe2O3. The only metals that rust are steel and iron. Other metals may become corroded but they do not rust. It is an actual chemical change which takes place when metal starts to ...

www.education.com/science-fair/article/iron-rusting

Corrosion is the chemical reaction where metals break down slowly because of other elements in their environment..Rusting, a well known example of corrosion, is the breakdown of the metal iron.The reactants of this chemical reaction are iron, water, and oxygen, and the product is hydrated iron oxide, better known as rust.Rust, unlike iron, is crumbly, orange, and pretty much useless for ...

en.wikipedia.org/wiki/Rust

Rust is an iron oxide, a usually red oxide formed by the redox reaction of iron and oxygen in the presence of water or air moisture. Several forms of rust are distinguishable both visually and by spectroscopy, and form under different circumstances.

www.answers.com/Q/How_is_rust_formed

Rust is a general term for describing iron oxides. In colloquial usage, the term is applied to red oxides, formed by the reaction of iron and oxygen in the presence of water or air moisture.

www.reference.com/science/rust-form-b568f0246d0a2889

Rust is the common name given to the product of the corrosion that occurs in iron and its alloys. The rust that appears is typically a reddish color. In time, an iron mass will become entirely rust and disintegrate. To prevent rust from occurring, several rust-resistant alloys have been created, such as stainless steel.

www.enotes.com/homework-help/how-does-rust-form-139555

Rust is a common term used for the corrosion of iron and its alloys (i.e. steel), formed by the reaction of the iron with oxygen. Given sufficient time, oxygen, and water, any iron mass eventually ...

www.quora.com/How-is-rust-formed

When you talk about rust, you are usually talking about the very reddish-brown compound identified as Iron Oxide. This is formed when the Iron and Oxygen atoms react with the moisture in the air. It is a very common occurrence in anything that is ...

corrosion-doctors.org/Experiments/rust-chemistry.htm

The loose porous rust or Fe(OH) 3 can slowly transform into a crystallized form written as Fe 2 O 3.H 2 O the familiar red-brown stuff that is called "rust" forming tubercles as shown here. Since these processes involve hydrogen ions or hydroxide ions, they will be affected by changes in pH. With limited O2, magnetite is formed (Fe 3 O 4).

www.wonderopolis.org/wonder/why-do-some-things-rust

If so, it was probably reddish-brown and flaking in many places. Those spots where the metal has corroded are called rust. But what exactly is rust? Rust is usually used to refer to a very common, reddish-brown compound called iron oxide (Fe 2 O 3). Iron oxide is formed when iron and oxygen react in the presence of water or moisture in the air.

science.howstuffworks.com/question445.htm

When a piece of metal corrodes, the electrolyte helps provide oxygen to the anode. As oxygen combines with the metal, electrons are liberated. When they flow through the electrolyte to the cathode, the metal of the anode disappears, swept away by the electrical flow or converted into metal cations in a form such as rust.