give three methods of preventing rusting
Answers
galvanisation
paint the metal
apply oil
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Answer:
1. Galvanizing
2. Stainless Steel
3. Powder coating
Explanation:
1. Galvanizing:-
Galvanizing is a method of rust prevention. This is accomplished through hot-dip galvanizing or electroplating. The iron or steel object is coated in a thin layer of zinc. This stops oxygen and water from reaching the metal underneath but the zinc also acts as a sacrificial metal. Zinc is more reactive than iron, so it oxidizes in preference to the iron object.
2. Stainless Steel:-
Rust resistant alloys. Stainless steel is an alloy and contains a minimum of 11% chromium. This allows the formation of a protective film of chromium oxide which acts as a shield against rust. The protective film will re-form if damaged. Corrosion resistance can be further enhanced with the addition of nickel.
3. Powder coating:-
Powder coating is when a dry powder is evenly applied to a clean surface. Then, the object is heated, turning the powder into a thin film. Acrylic, polyester, nylon, vinyl, epoxy, and urethane powders are available. Powders are applied using an electrostatic spray process. The electrically conductive object is sprayed with a charged, non-conducting powder.