The document discusses the purpose and application of bitumen paint to the bottom of power line transmission towers. Bitumen paint provides anti-rust protection to the tower legs. It describes preparing the metal surface by removing loose rust and debris, then applying a minimum of three coats of bitumen paint over a period of 6-8 hours to allow drying between coats. The black coating protects the tower legs from corrosion.

1. TRANSMISSION LINE
TOWER LEG PROTECTION
ANTI RUST BITUMEN
PAINTING

2. CONTENTS
• PURPOSE OF BITUMEN PAINT
• MATERIALS
• SURFACE PREPARATION
• APPLICATION
• FINISHING
• FINAL OUTLOOK

3. What is the purpose of the black coating on the
bottom of the power line Tower?

4. MATERIALS
Anti rust bituminous black paint 2 inch Wide Brush

5. General Surface Preparation Care needs to be taken over preparation
of surfaces before application. All surfaces must be free from
oil, dirt, dust and loose debris. On metal surfaces all loose rust should be
removed using a Soft brush / Cotton.
SURFACE PREPARATION
Tower Metal
Surface Cleaning
by Cotton Cloth

6. APPLICATION
Bitumen Paint should be applied by brush or spray. Apply evenly
and ensure no pooling of the solution. A minimum of three coats
Bitumen Paint is recommended. Apply two coats, allowing at least
a 6 - 8 hour drying period between coats.

7. FINISHING

8. FINAL OUTLOOK
OUTER SURFACE INNER SURFACE
LOCATION – 21X/0 (Darbhanga Section)

9. By : Subhasish Panja