Anodizing of Aluminum

2Al + 3H2O → Al2O3 + 6H+ + 6e−

개요

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.

참여 물질

역할 물질 계수 상태
반응물 Aluminum Al 2 (s)
반응물 Water H₂O 3 (l)
생성물 Aluminum Oxide Al₂O₃ 1 (s)

일상 속 예시

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

산업적 중요성

양극 산화는 항공우주, 건축, 자동차, 소비자 전자 제품 분야에서 사용됩니다. 연간 시장 규모는 40억 달러를 초과합니다.

성질

유형
Electrochemical
가역 반응
아니오
에너지
흡열
ΔH
871.0 kJ/mol

관련 반응

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.