Rusting Prevention by Oil Coating

4Fe + 3O2 → 2Fe2O3 (prevented)

概要

Oil or grease coating prevents iron oxidation by creating a physical barrier that excludes water and oxygen from the iron surface. Without both oxygen and water in contact with iron, the electrochemical corrosion cells cannot form. This is one of the simplest and oldest corrosion prevention methods.

参加者

役割 物質 係数 状態
反応物 Oxygen O 3 (g)
反応物 Iron Fe 4 (s)
生成物 Iron(III) Oxide Fe₂O₃ 2 (s)

日常の例

Applying WD-40 or oil to tools, bicycle chains, and hinges prevents rust by displacing water and sealing out oxygen.

産業上の重要性

防食コーティング（油、塗料、ポリマー）は鋼構造物や機械の寿命延長に不可欠な数十億ドル規模の産業である。

特性

タイプ
Redox
可逆的
いいえ
エネルギー
発熱性
ΔH
-1648.4 kJ/mol

関連する反応

Iron(II) to Iron(III) Oxidation by Oxygen Bleaching with Sodium Hypochlorite Copper Reduction of Silver Ion Aqua Regia Dissolving Gold Cerium(IV) Reduction by Iron(II) Chlorine Oxidation of Bromide Copper Oxidation by Nitric Acid Hypochlorite Oxidation of Hydrogen Peroxide Hydrogen Peroxide as Oxidizing Agent (Acidic) Displacement of Hydrogen from Acid by Magnesium

Frequently Asked Questions

What is the equation for Rusting Prevention by Oil Coating?
The balanced equation is: 4Fe + 3O₂ → 2Fe₂O₃ (prevented).
What type of reaction is Rusting Prevention by Oil Coating?
Rusting Prevention by Oil Coating is a redox reaction.
Is Rusting Prevention by Oil Coating exothermic or endothermic?
Rusting Prevention by Oil Coating is exothermic (releases energy). The enthalpy change (ΔH) is -1648.4 kJ/mol.