Anodizing of Aluminum

2Al + 3H2O → Al2O3 + 6H+ + 6e

概要

Anodizing grows a thick, porous aluminum oxide layer on aluminum surfaces by making the aluminum the anode in an acid electrolyte (typically 15–20% H₂SO₄). The oxide layer (5–25 μm for decorative, up to 150 μm for hard anodizing) provides corrosion resistance, wear resistance, and can absorb dyes for coloring.

参加者

役割 物質 係数 状態
反応物 Aluminum Al 2 (s)
反応物 Water H₂O 3 (l)
生成物 Aluminum Oxide Al₂O₃ 1 (s)

日常の例

Apple MacBooks, iPhones, and many premium electronics use anodized aluminum for the durable, colored finish.

産業上の重要性

陽極酸化処理は航空宇宙、建築、自動車、家電製品に使用されています。市場規模は年間40億ドルを超えています。

Frequently Asked Questions

What is the equation for Anodizing of Aluminum?
The balanced equation is: 2Al + 3H₂O → Al₂O₃ + 6H⁺ + 6e⁻.
What type of reaction is Anodizing of Aluminum?
Anodizing of Aluminum is a electrochemical reaction.
Is Anodizing of Aluminum exothermic or endothermic?
Anodizing of Aluminum is endothermic (absorbs energy). The enthalpy change (ΔH) is 871.0 kJ/mol.