2.1 When certain elements are added to stainless steel they may cause changes in the properties of the stainless steel - NSC Agricultural Technology - Question 2 - 2017 - Paper 1

The final product formed is called an alloy.

When a metal is annealed, it becomes soft. This process involves heating the metal to a specific temperature and then allowing it to cool slowly, which helps to relieve internal stresses and improve ductility.

1. Removing flux residues helps to reduce the tendency to cause staining, which can affect the appearance of the finished product.
2. It also reduces the likelihood of corrosion, as remaining flux can be corrosive and may compromise the integrity of the joint over time.

Cooling brass rapidly in cold water can cause it to crack due to thermal shock, making it hard and brittle, which compromises its mechanical properties.

1. Tin is silvery-white in color and has a shiny appearance.
2. It is soft and malleable, allowing it to be easily shaped and formed.
3. Tin possesses corrosion-resistant properties, which prevent contamination of food.

Adhesion is the ability of the molecules of an adhesive to cling to the molecules of other substances, allowing them to bond together.

1. The type of material to be joined is crucial, as different adhesives work better with specific materials.
2. The conditions under which the joint will be used should also be considered, including temperature and exposure to moisture.

1. Always store catalyst and accelerator properly to avoid accidents.
2. Wear gloves and protective clothing to safeguard the skin, since glass fibre can irritate.
3. Use acetone in a well-ventilated room to minimize inhalation of fumes.
4. Handle glass fibre matting carefully to prevent small pieces from getting lodged in the skin.

1. Vesconite does not suffer from electrolytic corrosion, which allows for easier removal without damage to the bush.
2. Its design means it does not seize onto metal surfaces; hence, it can be removed without requiring excessive force.