Industry News

Erosion-Resistant Coating Engineered for Flue Gas Systems

A.W. Chesterton Co. recently released its ARC S7 AR, a sprayable, erosion-resistant version of its ARC S7 coating. This state-of-the-art lining is especially engineered for surfaces exposed to condensing flue gas with erosive particulates in gas flow. 

“This level of protection can significantly extend equipment life,” said Steve Bowditch, global market development manager for ARC efficiency and protective coatings. “Less erosion translates to fewer problems and more uptime.”

Technical Features of the Lining

The ARC S7 AR lining is comprised of silicon carbide particles and micronized glass flake reinforcements that are suspended in a high-performance Novolac vinyl ester resin. It can be applied using conventional airless spray equipment at film thicknesses of up to 0.6 mm (25 mils, 635 microns) per coat. 

When cured, ARC S7 AR forms a film with strong resistance to erosive particulate flow under elevated temperature condensing gas exposures seen in flue gas and desulfurization environments.

In immersion applications where permeation concerns exist, the lining can be applied as an erosion-resistant topcoat at its prescribed dry film thickness (DFT) on top of a 15-20 mil (381-508 micron) coat of ARC S7.

Withstands Exposure, Thermal Cycling

The lining can withstand continuous exposure up to 180 °C and repeated thermal cycling, from 20 °C to 180 °C, without cracking or disbonding. It has exceptional chemical resistance when exposed to organic as well as inorganic acids under wide concentration ranges, according to the manufacturer.

Available in two contrasting colors of light gray and dark gray, the ARC S7 AR lining has a volatile organic compound (VOC) level of g/L, making it a safe and environmentally acceptable option where VOC concerns exist.

For more information, contact: A.W. Chesterton Co., (978) 469-6426,