HRCSA repair procedure
NOTE: The following repair for fully cured HRCSA applications! Contact technical assistance on how to manage ‘not-yet-cured’ coating repairs.
1. Remove poorly adhered or damaged coating to expose the substrate where restoration of damaged TR2100 HRCSA is needed.
Remove all loose foreign matter, including non-tightly-adhered paints, rust, and loose scale, etc. by hand tool cleaning, (SSPC-SP2) and power tool cleaning (SSPC-SP3).
Mitigate salts
Blow-dry surfaces
Solvent wipe to soften existing coating
Apply new coating
Mitigating Salts:
With the removal of the damaged coating, mitigate chloride, nitrate or sulfate salts using a Soluble Salt Remover before applying new layers of HRCSA:
- by high-pressure-water-cleaning:
- Hand cleaning use Chlor-rid DTS, 40 to 1 dilution of straight Chlor-rid, in small area hand washing with Chlor-rid DTS applied and worked into the surface using a bristle brush followed by a clean potable water rinse leaving surface chloride level readings not exceeding 7 ppm.
Blow-dry surfaces:
Blow dry with clean, dry 100 PSI air. Ensure surface is dry. Solvent wipe to soften the existing HRCSA before adding new HRCSA materials overtop. Ensure full compliance with the application parameters on the manufactures data sheets.
For small repair surfaces, apply TR2100 HRCSA Primer/Topcoat by brush on the affected steel surfaces to a thickness of 15 – 18 mils wet film thickness.
Special Conditions (Recurrent condensation cold steel / high humidity)
Cold steel / high humidity: If condensation keeps reappearing on the steel surface apply Termarust TRT01 Thinner by sprayer as per SSPC-SP1 followed by 100 PSI clean, dry air blow-down to evaporate the solvent. Once evaporated, IMMEDIATELY apply topcoat on the dry area before condensation reappears.
* This flash-drying technique is only to be used if surfaces are impossible to dry due to condensation. Overcoating condensation beads may negatively affect the long-term performance of the coating.
Warning: Overcoating condensation beads may negatively affect the long-term performance of the coating.
Cold weather applications.
<2C cold weather applications: If spot repairs are required below allowable temperature limits (Spot repair attachment points only) heat the area with an electric heat gun (no propane-fired heaters) before following above procedure.
NOTE: See product data sheets and condensed specifications for additional information.