Protect steel parts against corrosion

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Products for protecting steel parts against corrosion

Bare or worn steel needs more than colour. A corrosion focused system starts with clean metal, epoxy primer and a compatible durable topcoat.

What do you need to protect steel parts against corrosion?

Cleaning and degreasing

Mipa silicone remover in liquid or spray format removes grease, wax and silicone before sanding, priming or coating.

Epoxy corrosion primer

Mipa EP 100-20 gives a zinc phosphate epoxy base on steel, zinc, aluminium, GRP and mineral surfaces; use it with Mipa EP hardener and EP thinner.

Chassis corrosion topcoat

Mipa PU 265-50 is a high build 2K PU chassis coating with zinc phosphate, solvent resistance and strong resistance to water, UV and weathering.

Prefilled 2K PU spray option

Mipa 2K-PU-Industry-Prefilled Spray is suited to small parts, edges and local colour work when a mixed spray gun application is unnecessary.

How to protect steel parts against corrosion

  1. 1
    Remove rust and contamination

    Take loose rust, scale and weak paint back to a stable surface, then clean thoroughly with silicone remover.

  2. 2
    Create a keyed surface

    Sand or blast to a consistent profile so the primer can bite into the steel rather than sitting on a polished surface.

  3. 3
    Apply epoxy primer

    Prime bare steel with Mipa EP 100-20 using the matching EP hardener and EP thinner.

  4. 4
    Apply the chassis coating

    Finish with Mipa PU 265-50 and the matching PU hardener and 2K thinner for a tough corrosion resistant top layer.

  5. 5
    Protect edges and bolt areas

    Give corners, holes and weld seams enough film coverage because corrosion usually starts where the coating is thinnest.

Which corrosion protection products should you choose?

Two coat liquid system

Choose EP 100-20 followed by PU 265-50 for steel parts that need a strong protective coating build.

Small part spray work

Use the prefilled 2K PU spray for brackets and smaller prepared steel parts where full spray equipment is excessive.

Technical details

  • EP 100-20 is a zinc phosphate epoxy primer for steel, zinc, aluminium, GRP and mineral substrates.
  • PU 265-50 is a high build chassis coating with active zinc phosphate corrosion protection and resistance to water, UV and weathering.
  • Mipa EP thinner belongs with the epoxy primer stage; Mipa 2K thinner belongs with the polyurethane topcoat stage.
  • Do not coat over active rust, loose scale or trapped oil because those areas can fail beneath the new coating.
Practical suggestion

For steel parts with sharp edges, lightly round or smooth the edge before priming. Coatings protect better when the film can build evenly over the edge.

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