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- As far as why rust only forms in the presence of water, water's "polar" nature is at work here as well. Being a polar solvent, it has some affinity for electrons, which are easily given up by the iron as a transition metal, and are attracted to the hydrogen atoms in the water.
chemistry.stackexchange.com/questions/5134/why-cant-rust-form-without-water
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Can rust form without water?
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May 29, 2013 · "Rust" can form without water, if by rust you mean an iron oxide. Fe2 O3 ( the red oxide) can form in air at ambient temperatures. The only example I know is fretting corrosion where the characteristic red powder forms around two rubbing steel/iron surfaces.
- Rusting without water? - Chemistry Stack Exchange
Without water the formula is the following: 4Fe +3OX2...
- Is water required for metal to rust, or is only oxygen ...
Some sources say ferrous metals don't rust without being...
- Rusting without water? - Chemistry Stack Exchange
Oct 26, 2015 · Without water the formula is the following: 4Fe +3OX2 2FeX2OX3 4 F e + 3 O X 2 2 F e X 2 O X 3. This reaction is very slow. More energy is needed to initiate the reaction as in the case with burning steel wool, or another means is needed to transport electrons.
May 16, 2023 · Some sources say ferrous metals don't rust without being exposed to humidity or water, whole others say they do rust as long as there is oxygen present, just more slowly. Which is correct?
Given sufficient time, any iron mass, in the presence of water and oxygen, could eventually convert entirely to rust. Surface rust is commonly flaky and friable, and provides no passivational protection to the underlying iron, unlike the formation of patina on copper surfaces.
- The Chemical Reaction That Forms Rust
- Preventing Rusting from Occurring
- Additional References
Although rusting is considered the result of an oxidation reaction, it's worth noting not all iron oxides are rust. Rust forms when oxygen reacts with iron, but simply putting iron and oxygen together isn't sufficient. Although about 21% of air consists of oxygen, rusting doesn't occur in dry air. It occurs in moist air and in water. Rust requires ...
Rust is brittle, fragile, progressive, and weakens iron and steel. To prevent the rusting of iron and its alloys, the surface needs to be separated from air and water. Coatings can be applied to iron. Stainless steel contains chromium, which forms an oxide, much like how iron forms rust. The difference is the chromium oxide does not flake away, so ...
Gräfen, H.; Horn, E. M.; Schlecker, H.; Schindler, H. (2000). "Corrosion." Ullmann's Encyclopedia of Industrial Chemistry. Wiley-VCH. doi:10.1002/14356007.b01_08Holleman, A. F.; Wiberg, E. (2001). Inorganic Chemistry. Academic Press. ISBN 0-12-352651-5.Waldman, J. (2015). Rust - The Longest War. Simon & Schuster. New York. ISBN 978-1-4516-9159-7.- Anne Marie Helmenstine, Ph.D.
Salt dissolved in water does not cause rusting, but it does speed it up – as does acid rain. Aluminium does not rust or corrode, because its surface is protected by a protective layer of...
Apr 24, 2017 · 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.
