Tank Inspection Procedure: Notes

A multi-coat paint system with a zinc-rich primer protects the metal tank. Inspect and recoat chips in the paint as follows:

Level 1 Chips:

• Level 1 chips are chips or abrasions in the coating that do not penetrate the top coat.
• Level 1 chips do not expose the gray zinc-rich primer.
• Level 1 chips do not require resurfacing.

Level 2 Chips:

• Level 2 chips are chips or abrasions that penetrate the top coat.
• Recoat Level 2 chips or abrasions in order to prevent corrosion
• The following two repair methods are recommended depending on whether the zinc-rich primer is still intact:
  • Method 1:

    Recoat the chip using any commercial room temperature cure two-component epoxy resin, Loctite® Part No. 14600 or equivalent, if the chip has not penetrated the zinc-rich primer.

  • Method 2:

    The following procedure is recommended if the chip has penetrated the zinc-rich primer and exposed the bare metal:

    1. Sand the damaged area in order to remove any rust and to rough-up the surrounding coating.
    2. Clean the damaged area with a commercial prepaint cleaning solvent-Dupont® Prep Sol or equivalent.
    3. Apply a zinc-rich cold galvanizing primer-LPS® Part No. 00516 or equivalent.
    4. Coat the area after the primer has cured using a room temperature cure two-component epoxy resin-Loctite® Part No. 14600 or equivalent.