Chrome Electroplating

Cr3+ + 3e− → Cr

개요

Chromium plating deposits a thin layer of chromium from a chromic acid or trivalent chromium bath. Decorative chrome is only 0.25–0.5 μm thick over a nickel undercoat, while hard chrome (industrial) is 20–250 μm thick. Chrome provides exceptional hardness (68–72 HRC), corrosion resistance, and a mirror-like finish.

참여 물질

역할 물질 계수 상태
생성물 Chromium Cr 1 (s)

일상 속 예시

The shiny chrome trim on cars, bathroom fixtures, and kitchen appliances is applied by this electroplating process.

산업적 중요성

크롬 도금은 자동차 트림, 유압 실린더, 피스톤 링, 산업용 롤러에 필수적입니다. 환경 규제로 인해 6가 크롬에서 3가 크롬으로 전환이 진행되고 있습니다.

성질

유형
Electrochemical
가역 반응
예
에너지
발열
ΔH
-215.0 kJ/mol

관련 반응

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

Frequently Asked Questions

What is the equation for Chrome Electroplating?
The balanced equation is: Cr³⁺ + 3e⁻ → Cr.
What type of reaction is Chrome Electroplating?
Chrome Electroplating is a electrochemical reaction. It is reversible under certain conditions.
Is Chrome Electroplating exothermic or endothermic?
Chrome Electroplating is exothermic (releases energy). The enthalpy change (ΔH) is -215.0 kJ/mol.