Chrome Electroplating

Cr³⁺ + 3e⁻ → Cr

Aperçu

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.

Participants

Rôle	Substance	Coefficient	État
Produit	Chromium Cr	1	(s)

Exemple du quotidien

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

Importance industrielle

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.

Propriétés

Type: Electrochemical
Réversible: Oui
Énergie: Exothermique
ΔH: -215,0 kJ/mol

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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.