What is Parco-Lubrising?

• A. A chemical treatment for iron and steel parts which converts the surface to a non-metallic oil absorbent phosphate coating.
• B. A method of galvanising copper.
• C. A process of anodising aluminum.
• D. A technique for electroplating nickel.

Answer: (A)

Parco-Lubrising is a chemical conversion coating applied to iron and steel surfaces. It chemically converts the surface to a phosphate coating that is non-metallic and porous, which can absorb oil. This creates a lubrication reservoir on the metal, helping to retain lubricant during assembly and operation and providing some corrosion protection. It’s not a metal plating or an oxide layer, and it’s specifically designed to improve lubricity for iron and steel parts.

Why the other options don’t fit: galvanising copper would add a zinc metallic coating to copper, not create an oil-absorbent phosphate layer on iron/steel. Anodising aluminum forms a hard aluminum oxide layer, not a phosphate coating on steel. Electroplating nickel deposits metal onto the surface, whereas Parco-Lubrising is a chemical conversion coating that stays non-metallic and serves as an oil-absorbent lubricant reservoir.