Surface Treatment &
Finishing.
Sandblasting, powder coating, PU painting, hot-dip galvanizing, and specialty finishes for all fabricated steel. From corrosion protection on outdoor structures to decorative PVD effects on stainless steel — every surface gets the right treatment for its environment and service life.
Surface treatment methods
we deliver.
Powder Coating
Electrostatic application of thermoset powder followed by 200°C oven curing. Delivers a uniform, durable finish in the full RAL colour range. Standard 60-80 micron DFT with 3-year coating warranty. Ideal for interior steelwork, railings, gates, and furniture.
Hot-Dip Galvanizing
Full immersion in molten zinc at 450°C creates a metallurgically bonded coating that protects steel for 7-15 years in outdoor and industrial environments. Compliant with IS 2629. Ideal for structural steel, outdoor staircases, fencing, and transmission towers.
PU & Epoxy Paint Systems
Multi-coat wet paint systems for industrial environments requiring chemical resistance, UV stability, and specific colour matching. 2-coat (primer + PU topcoat) or 3-coat (primer + MIO intermediate + PU topcoat) systems. Used on process plants, bridges, and marine structures.
Specialty Finishes
PVD (Physical Vapour Deposition) coating for brass, copper, rose gold, and black titanium effects on stainless steel. Wood-grain laminate wrapping for steel profiles. Corten weathering steel finish for architectural facades. These finishes combine the structural strength of steel with premium visual aesthetics.
How every surface
gets treated.
Surface Assessment
Every piece is inspected for mill scale, rust grade, existing coatings, and weld spatter. We classify the surface condition per ISO 8501-1 and determine the correct preparation sequence before any abrasive touches the steel.
Sandblasting / Surface Prep
Abrasive blasting to SA 2.5 (near-white metal) using steel grit or garnet media. Edges ground, weld spatter removed, and surface profile measured with a comparator to ensure proper coating adhesion.
Primer Application
Zinc-rich epoxy primer or shop primer applied within 4 hours of blasting to prevent flash rust. Dry film thickness (DFT) measured with a calibrated gauge at multiple points per piece.
Topcoat / Dip
Powder coating via electrostatic spray gun and 200°C oven cure, or hot-dip galvanizing at 450°C zinc bath, or multi-coat PU/epoxy paint system — depending on the specified finish and end-use environment.
Quality Inspection & DFT Measurement
Every coated piece checked for DFT compliance, adhesion (cross-cut test), visual defects, and colour consistency against RAL reference chips. Non-conforming pieces are stripped and re-coated.
Packing & Dispatch
Coated steel wrapped in foam or bubble sheet at contact points, edges protected with corner guards, and loaded with nylon slings to prevent coating damage during transit. Packing list and DFT report included.
Technical
details.
Every coating system is specified to match the service environment — indoor, outdoor, coastal, or industrial. DFT reports provided with every batch.
Common
questions.
What is the difference between powder coating and paint?
Powder coating is a dry finish applied electrostatically and cured in an oven at 200°C. It produces a thicker, more uniform coating (60-80 micron) than most wet paints and is more resistant to chipping, scratching, and fading. Wet paint (PU or epoxy) is better suited for very large structures that cannot fit in an oven, for multi-coat industrial systems requiring specific chemical resistance, or when on-site touch-up flexibility is needed.
How does the hot-dip galvanizing process work?
The steel is first degreased, then pickled in acid to remove rust and scale, then fluxed. It is then fully immersed in a bath of molten zinc at approximately 450°C. The zinc reacts with the steel surface to form a series of zinc-iron alloy layers topped by pure zinc. This metallurgical bond means the coating does not peel or flake like paint. Typical coating thickness is 80-120 microns, providing 7-15 years of corrosion protection depending on the environment.
Can you match a specific colour for our project?
Yes. For powder coating, we work with the full RAL colour chart — over 200 standard colours available off the shelf. For custom or brand-specific colours, we can source matched powder from our suppliers with a 5-7 day lead time. For PU paint, any colour can be mixed to match a provided sample or Pantone/RAL reference. We provide a coated sample plate for approval before production.
Can old or rusted steel be re-coated?
Absolutely. We sandblast old steel to SA 2.5 standard, removing all previous coating, rust, and mill scale down to near-white metal. Once the surface is properly prepared, it accepts new coating just as well as fresh steel. We regularly re-coat structural steel, railings, gates, and industrial equipment that has been in service for years.
What is the typical turnaround time for surface treatment?
For powder coating, 3-5 working days from receipt of steel at our facility. Hot-dip galvanizing takes 4-7 working days depending on batch size and galvanizer scheduling. Multi-coat paint systems take 5-8 working days due to inter-coat drying times. These timelines assume the steel arrives fabricated and ready for treatment — if we are also fabricating the steel, surface treatment is scheduled as part of the overall production timeline.
Have a project?
Let's engineer it.
Share your drawings or describe your project. We'll visit the site, prepare shop drawings, and send a transparent engineering quote — material, labour, finishing, and installation — within 48 hours. No obligations.