High-build coal tar epoxy by Denso protects steel and concrete

Denso Protal 600 CTE high-build coal tar epoxy can be applied by brush or spray.

Denso North America has earned a stellar reputation for anti-corrosion solutions, including liquid coatings for pipelines and infrastructure. One powerful product is the Protal 600 CTE high-build coal tar epoxy, designed for long-term protection of steel and concrete substrates. It protects against water, wastewater, seawater, alkaline water, and acidic water corrosion.

Among the recommended applications for Protal 600 CTE are coating steel piles, sheet piles, lock gates, reservoirs, non-potable water pipelines, treatment or storage tanks, bridges, and other aggressive tasks.

Applicable by brush or spray

This is a two-part high-build coal tar epoxy that is applicable by brush or spray as a single or two-coat system, plus a polyamide with high chemical and abrasion resistance. Advantages of using Protal 600 CTE: high resistance to sea, waste, alkaline, acidic, and pure water; high impact resistance; high flexibility, hardness, and adhesion; no primer required; high build of up to 600 microns in one coat; and compatibility with cathodic protection systems.

Protal 600 CTE works on concrete and steel surfaces. Concrete surfaces must be cured for 20 days at 25 degrees Celsius and 50 per cent relative humidity. Users should prepare them according to ASTM D4258 and ASTM D4259 and fill and repair all voids.

For steel surfaces, users should remove all contaminants from the surface, since oil, dust, and grease can interfere with adhesion; the surface should also be devoid of projections, sharp edges, and high points, while fillets must be ground smooth. Users should prepare surfaces by grit-blasting to a clean near-white finish with SSPC-SP 10 or NACE No. 2 for immersion service, or with SSPC-SPC6 or NACE No. 3 for non-immersion service. Appropriate angular abrasive should be used for a 50-to-100-micron anchor profile.

To apply this high-build coal tar epoxy by spray, Denso recommends using a single leg airless unit, a minimum of 60:1 airless pump. A wet-on-wet spray technique is required to achieve a build of 280-660 microns, and users should measure coating thickness with a wet-film thickness gauge. For repairs, surfaces should be roughened about 25 millimetres around repair areas with 60-80-grit sandpaper.

To learn more, contact Denso.

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