Chrome Electroplating
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Cr3+ + 3e− → Cr
概述
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.
参与者
| 角色 | 物质 | 系数 | 状态 |
|---|---|---|---|
| 产物 | Chromium Cr | 1 | (s) |
日常示例
The shiny chrome trim on cars, bathroom fixtures, and kitchen appliances is applied by this electroplating process.
工业重要性
电镀铬对汽车装饰、液压缸、活塞环和工业辊至关重要。环保法规正推动从六价铬向三价铬的转变。
属性
- 可逆
- 是
- 能量
- 放热
- ΔH
- -215.0 kJ/mol
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.