Anodizing of Aluminum

2Al + 3H₂O → Al₂O₃ + 6H⁺ + 6e⁻

Genel Bakış

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.

Katılımcılar

Rol	Madde	Katsayı	Hal
Reaktan	Aluminum Al	2	(s)
Reaktan	Water H₂O	3	(l)
Ürün	Aluminum Oxide Al₂O₃	1	(s)

Günlük Örnek

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

Endüstriyel Önemi

Anodizing is used in aerospace, architecture, automotive, and consumer electronics. The market exceeds $4 billion annually.

Özellikler

Tür: Electrochemical
Geri Dönüşümlü: Hayır
Enerji: Endotermik
ΔH: 871,0 kJ/mol

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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.