IndMar Coatings will assist in the preparation of specifications for customer or owner projects. This includes on-site inspections and recommendations. As a general
guide, the following information is provided.
- The substrate
- and the expected service life of the coating system.
Economics, surface contamination, and the effect on the substrate will also influence the selection of surface preparation methods.
Regularly scheduled maintenance
For a protective coating system to provide maximum protection, a regularly scheduled program of
inspection, touch-up and maintenance is required. The system should be inspected at:
- six-monthintervals for
- 12-18 months or longer for less severe exposures
For atmospheric service, when up to 10 percent of the total area has been chemically or physically damaged, eroded, or rusted, it may be Power
Tool Cleaned, spot primed, and finished with the same coating as originally used.
For immersion service, when
up to 10 percent of the total area has failed, spot blasting back to at least one-inch into sound film, feathering the edges, and re-coating with the original system is required.
When the coating system has deteriorated to approximately 33 percent of the total area, it may be more economical to consider a complete re-coat.
- When film has eroded due to weathering or worn thin due to abrasion or impingement (with no rusting), the surface contaminants may be removed through:
waterblasting(approximately 2,000 psi, over 4 gallons per minute) with emulsifying agents or cleaners , rinsing, drying re-coating with the recommended finish coat(s) to maintain or even extend the original design life of the coating system
- Roughening of the surface will improve the adhesion of the subsequent coats.