Chrome Electroplating

Cr³⁺ + 3e⁻ → Cr

Visão geral

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.

Participantes

Papel	Substância	Coeficiente	Estado
Produto	Chromium Cr	1	(s)

Exemplo do cotidiano

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

Importância industrial

A cromagem é essencial para frisos automóveis, cilindros hidráulicos, segmentos de pistão e rolos industriais. As regulamentações ambientais estão a impulsionar a passagem do crómio hexavalente para o trivalente.

Propriedades

Tipo: Electrochemical
Reversível: Sim
Energia: Exotérmico
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.