镍

镍

Nickel (a chemical element).

Here, '镍' is used to refer to the element nickel as a material in the alloy.

这种合金中包含镍和铬。

This alloy contains nickel and chromium.

In this sentence, '镍' is mentioned for its properties and appearance.

镍是一种银色的金属。

Nickel is a silver-colored metal.

Here, '镍' is used to describe the nickel coating applied to the product for functional purposes.

为了增加硬度，产品涂了一层镍。

To increase hardness, the product was coated with a layer of nickel.