Anodizing of Aluminum

2Al + 3H₂O → Al₂O₃ + 6H⁺ + 6e⁻

अवलोकन

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.

प्रतिभागी

भूमिका	पदार्थ	गुणांक	अवस्था
अभिकारक	Aluminum Al	2	(s)
अभिकारक	Water H₂O	3	(l)
उत्पाद	Aluminum Oxide Al₂O₃	1	(s)

रोजमर्रा का उदाहरण

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

औद्योगिक महत्व

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

गुण

प्रकार: Electrochemical
प्रतिवर्ती: नहीं
ऊर्जा: ऊष्माशोषी
ΔH: 871.0 kJ/mol

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.