Surface Profile (Micron Roughness)

Surface profile, also called micron roughness, is the measure of the anchor pattern created on a blasted steel surface. It is usually expressed in microns (µm) and ensures proper mechanical adhesion of protective coatings.

Where is surface profile relevant?

Surface profile control is required in:

• Oil & Gas – offshore risers, flare booms, topside piping.
• Petrochemical & Chemical plants – process vessels, reactors, insulated pipelines.
• Marine & Offshore wind – deck areas, turbine towers, hull details.
• Infrastructure & Power – bridges, cranes, boilers, turbines.

For you as an asset owner, correct surface profile ensures coatings bond securely to steel, preventing premature coating failure.

Extra explanation

• How it is measured: using replica tape (Testex), stylus profilometers, or comparator plates.
• Typical values:
  • 40–70 µm for thin film coatings.
  • 70–100 µm for epoxy and polyurethane systems.
  • 100 µm for high-build or thermal spray aluminium (TSA).
• Standards: ISO 8503, ASTM D4417.

Too low a profile = poor adhesion.
Too high a profile = risk of premature rusting and higher coating consumption.

Pinovo and surface profile

Pinovo’s vacuum blasting:

• Delivers consistent surface profiles in the specified micron range.
• Allows precise control through adjustable abrasive and nozzle settings.
• Ensures clean, dust-free steel, improving coating adhesion.
• Supports compliance with ISO and NORSOK requirements.

Pinovo does not measure surface profile itself, but ensures that the blasted substrate consistently meets the required profile for coating systems.