Anodizing of Aluminum

2Al + 3H2O → Al2O3 + 6H+ + 6e−

Ikhtisar

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.

Peserta

Peran Zat Koefisien Keadaan
Reaktan Aluminum Al 2 (s)
Reaktan Water H₂O 3 (l)
Produk Aluminum Oxide Al₂O₃ 1 (s)

Contoh Sehari-hari

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

Pentingnya dalam Industri

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

Sifat

Jenis
Electrochemical
Dapat Dibalik
Tidak
Energi
Endoterm
ΔH
871,0 kJ/mol

Reaksi Terkait

Electrolysis of Water Electrolytic Production of Chlorate Electrorefining of Copper Alkaline Battery Discharge Cathodic Protection (Zinc Sacrificial Anode) Chlor-Alkali Electrolysis Chrome Electroplating Nickel-Metal Hydride Battery Sodium-Sulfur Battery Electrochemical CO₂ Reduction to CO

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.