Methods of Preventing Rust and Improving Metal Properties Quiz

Galvanisation is the method of coating steel and iron with a thin layer of zinc. This protects the steel and iron from rusting even if the zinc coating is broken.

Alloying improves the properties of a metal by changing its hardness, strength, and resistance to rust. For example, adding a small amount of carbon to iron makes it hard and strong, while mixing iron with nickel and chromium produces stainless steel, which is hard and does not rust.

An alloy is a homogeneous mixture of two or more metals, or a metal and a non-metal. It is prepared by melting the primary metal and then dissolving the other elements in it in definite proportions, followed by cooling to room temperature.

<p>An amalgam is an alloy containing mercury as one of the metals. It is different from other alloys in terms of its composition, as it specifically includes mercury.</p> Signup and view all the answers

<p>Adding a small amount of carbon to iron makes it hard and strong. Pure iron is very soft and stretches easily when hot, but with the addition of carbon, its properties change to become harder and stronger.</p> Signup and view all the answers

<p>Chrome plating serves to provide a protective layer on the surface of steel and iron, preventing direct contact with moisture and oxygen, thereby inhibiting rusting.</p> Signup and view all the answers

<p>Anodising forms a protective oxide layer on the surface of metals, which acts as a barrier against corrosion and rusting.</p> Signup and view all the answers

<p>The two methods mentioned are galvanising and anodising.</p> Signup and view all the answers

<p>Greasing forms a protective layer on the surface of iron, preventing direct contact with moisture and oxygen, thus inhibiting rusting.</p> Signup and view all the answers

<p>Making alloys is significant as it allows us to tailor the properties of metals to specific requirements, such as hardness, strength, and resistance to rust.</p> Signup and view all the answers