Question

1.
Describe how rusting is prevented on
(a) the moving parts of a machine;
(b) food cans;
(c) kitchen sink taps;
(d) the parts of a steel pier submerged in water.
2.
The diagrams show a simple experiment on rusting.
What information can be obtained from the experiment?
​

Answer 1

Answer:

for a is oiling

Explanation:

Answer 2

Answer:

1(a)Oil or grease coatings are used on moving parts to keep the part protected from oxygen and water. Use oil or grease on moving parts that are exposed to other moving parts. Oil or grease must be periodically re-applied to maintain corrosion-resistance.

(b)When iron is coated in zinc, the process is called galvanising . The zinc layer stops oxygen and water reaching the iron. ... The inside of a steel food can is electroplated with tin, a less reactive metal than iron. It provides a physical barrier to oxygen and water, stopping the can rusting.

(c)Rinse your fixtures thoroughly after every use.

Clean all stainless steel fixtures at least once a week.

Avoid cleaners containing chloride (bleach), as they can corrode the fixture. Use mild products such as: Fantastik Antibacterial Heavy Duty.

(d)Keep It Clean and Dry. Water is enemy number one when it comes to rust, because it's the oxygen in water molecules that combines with iron to form iron oxide. ...

Prevent Scratches. ...

Apply A Protective Coating. ...

Use Stainless Steel. ...

Use Galvanized Metal. ...

Regular Maintenance.