Transformer Painting & Protection

We provide transformer surface treatment and painting services to protect equipment from corrosion and environmental damage.

Pre-Work Preparations

• Obtain shutdown approval and necessary safety clearances.
• Ensure transformer is properly isolated, earthed, and safe to work on.
• Cover bushings, CTs/PTs, nameplates, and other sensitive components with protective wrapping (polythene sheets/tarpaulin).
• Arrange PPE (gloves, helmet, mask, safety goggles).

Surface Preparation

• Cleaning: Remove all dust, grease, and oil with cotton waste dipped in solvent (diesel/kerosene/approved degreaser).
• Rust & Old Paint Removal:
• Use wire brush, emery paper, or mechanical tools (scraper/grinder).
• For heavy rust, apply rust remover/convertor (phosphoric acid-based).
• Surface Smoothing: Smoothen rough patches by emery polishing.
• Final Cleaning: Wipe with dry cloth and compressed air.

Primer Application

• Apply one coat of Zinc Chromate Red Oxide Primer (or equivalent anti-corrosive primer as per IS 2074).
• Use brush/spray gun for uniform application.
• Drying time: 6–8 hours minimum (or as per manufacturer).
• Ensure primer coat is free from runs, sags, or uneven thickness.

Intermediate Coat (Optional but Recommended)

• Apply one coat of synthetic enamel undercoat (grey) for better adhesion.
• Allow proper drying (6–8 hours).

Final Painting

• Apply two coats of synthetic enamel transformer paint (shade as per customer/specification, usually Smoke Grey / Siemens Grey RAL 7032 / RAL 7035).
• Method: Spray painting (preferred) or brush.
• Ensure a uniform, glossy, and streak-free finish.
• Dry each coat properly before applying the next (6–8 hours).

Finishing & Quality Checks

• Remove protective coverings from bushings/nameplates.
• Touch-up unpainted or damaged areas.
• Ensure paint thickness: 40–60 microns per coat (total DFT 100–150 microns, as per IS:1477).
• Verify smooth finish with no blistering, peeling, or rust marks.

Documentation

• Record transformer details, paint type, batch numbers, and application method.
• Submit painting completion report with before/after photos.
• End Result: The transformer body will be protected from corrosion, weather, and environmental factors, enhancing its life and maintaining aesthetics.