“rusting”的概念、定义、翻译、参考文献-科学参考

rusting

Chemistry

Corrosion of iron (or steel) to form a hydrated iron(III) oxide Fe₂O₃.xH₂O. Rusting occurs only in the presence of both water and oxygen. It is an electrochemical process in which different parts of the iron surface act as electrodes in a cell reaction. At the anode, iron atoms dissolve as Fe²⁺ ions:
$Fe (s) \to {Fe}^{2 +} (aq) + 2 e$
At the cathode, hydroxide ions are formed:
$O_{2} {(aq) + 2H}_{2} O (l) + 4e \to {4OH}^{-} (aq)$
The Fe(OH)₂ in solution is oxidized to Fe₂O₃. Rusting is accelerated by impurities in the iron and by the presence of acids or other electrolytes in the water.

Chemical Engineering

An electrochemical corrosion process involving the oxidation of iron to form a hydrated iron oxide that occurs in the presence of both water and oxygen. It is very damaging to process equipment and support structures. Rust has a characteristic red colour and is permeable to both water and air. Rust prevention involves coatings that can exclude oxygen from the iron surface. Certain paints can provide the necessary seal. Galvanization is an effective process involving coating the iron with zinc. The use of stainless steels involves an alloy with chromium that forms a passivation layer of chromium oxide on the surface. Compare corrosion.

单词	rusting
释义	rusting Chemistry Corrosion of iron (or steel) to form a hydrated iron(III) oxide Fe₂O₃.xH₂O. Rusting occurs only in the presence of both water and oxygen. It is an electrochemical process in which different parts of the iron surface act as electrodes in a cell reaction. At the anode, iron atoms dissolve as Fe²⁺ ions: $Fe (s) \to {Fe}^{2 +} (aq) + 2 e$ At the cathode, hydroxide ions are formed: $O_{2} {(aq) + 2H}_{2} O (l) + 4e \to {4OH}^{-} (aq)$ The Fe(OH)₂ in solution is oxidized to Fe₂O₃. Rusting is accelerated by impurities in the iron and by the presence of acids or other electrolytes in the water. Chemical Engineering An electrochemical corrosion process involving the oxidation of iron to form a hydrated iron oxide that occurs in the presence of both water and oxygen. It is very damaging to process equipment and support structures. Rust has a characteristic red colour and is permeable to both water and air. Rust prevention involves coatings that can exclude oxygen from the iron surface. Certain paints can provide the necessary seal. Galvanization is an effective process involving coating the iron with zinc. The use of stainless steels involves an alloy with chromium that forms a passivation layer of chromium oxide on the surface. Compare corrosion.
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