Question

Metal(a) which forms non porous oxide film are​

Answer 1

When an alloy is heated in air, an oxide layer forms on its surface. This layer can consist of oxides of iron, chromium and other elements, depending on the composition of the material.

Answer 2

There are several metals that can form non-porous oxide films. These metals are referred to as "passive metals" because they have a natural tendency to form a protective oxide layer that prevents further oxidation or corrosion. Some examples of passive metals include:

• Aluminum - Aluminum oxide (Al2O3) is a very hard and non-porous oxide that forms on the surface of aluminum. This oxide layer provides excellent corrosion resistance and protects the underlying metal from further oxidation.

• Stainless steel - Stainless steel contains chromium, which reacts with oxygen in the atmosphere to form a thin, non-porous oxide layer. This layer is self-healing and provides excellent corrosion resistance.

• Titanium - Titanium oxide (TiO2) is a very hard and non-porous oxide that forms on the surface of titanium. This oxide layer provides excellent corrosion resistance and protects the underlying metal from further oxidation.

• Magnesium - Magnesium oxide (MgO) is a non-porous oxide that forms on the surface of magnesium. This oxide layer provides excellent corrosion resistance and protects the underlying metal from further oxidation.

• Zinc - Zinc oxide (ZnO) is a non-porous oxide that forms on the surface of zinc. This oxide layer provides excellent corrosion resistance and protects the underlying metal from further oxidation.

These metals are often used in applications where corrosion resistance is critical, such as in the construction of buildings, bridges, and other structures that are exposed to the elements.

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