Chrome Electroplating

Cr³⁺ + 3e⁻ → Cr

Tổng quan

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.

Người tham gia

Vai trò	Chất	Hệ số	Trạng thái
Sản phẩm	Chromium Cr	1	(s)

Ví dụ thực tế

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

Tầm quan trọng công nghiệp

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.

Tính chất

Loại: Electrochemical
Thuận nghịch: Có
Năng lượng: Tỏa nhiệt
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.