Coat battery trays and acid exposed metal

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Guide to coating battery trays and acid exposed metal

Battery trays and acid exposed metal need careful cleaning, corrosion removal and an epoxy coating system that protects the metal after the surface is stable.

What do you need to coat battery trays and acid exposed metal?

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.

Chemical resistant epoxy topcoat

Mipa EP 200-90 forms a gloss 2K epoxy topcoat for steel, zinc, aluminium, GRP and mineral surfaces exposed to mechanical or chemical strain.

How to coat battery trays and acid exposed metal

  1. 1
    Make the area safe first

    Remove the battery and residue safely, then only start coating work once the metal is dry and stable.

  2. 2
    Remove corrosion and weak coating

    Wire brush, sand or blast loose rust and old coating until the tray or metal part has a firm surface.

  3. 3
    Degrease before primer

    Clean the prepared metal with Mipa silicone remover so primer does not trap oil or handling contamination.

  4. 4
    Prime and topcoat in epoxy

    Apply EP 100-20 first, then EP 200-90 with the matching EP hardener and EP thinner.

  5. 5
    Cure before reinstalling parts

    Do not refit batteries, clamps or rubber mats until the coating has hardened enough for service.

Which acid exposed metal coating should you choose?

Epoxy coating build

Choose EP 100-20 plus EP 200-90 where the tray or bracket needs a coherent epoxy primer and topcoat system.

Spray cleaner for tight areas

Use silicone remover spray around corners, seams and brackets where cloth access is limited, then wipe away loosened contamination.

Technical details

  • EP 100-20 is suitable as a primer for chemical protection coatings and supports corrosion protection on prepared metal.
  • EP 200-90 is the dedicated gloss 2K epoxy topcoat for chemically and mechanically stressed surfaces.
  • Mipa EP 950 hardener and Mipa EP thinner support the epoxy topcoat stage and should not be swapped with polyurethane system components.
  • Any remaining acid residue, moisture or rust beneath the coating can shorten service life.
Practical suggestion

Battery areas have seams and brackets that are easy to miss. Clean and coat those edges deliberately instead of only spraying the visible flat tray.

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