Chrome Electroplating

Cr3+ + 3e− → Cr

Übersicht

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.

Teilnehmer

Rolle Substanz Koeffizient Zustand
Produkt Chromium Cr 1 (s)

Alltägliches Beispiel

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

Industrielle Bedeutung

Chrome plating is essential for automotive trim, hydraulic cylinders, piston rings, and industrial rollers. Environmental regulations are driving a shift from hexavalent to trivalent chrome.

Eigenschaften

Typ
Electrochemical
Reversibel
Ja
Energie
Exotherm
ΔH
-215,0 kJ/mol

Verwandte Reaktionen

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.