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Sherwin-Williams launches ultra-high-solids epoxy CUI-mitigation coating

Published by , Editorial Assistant
World Pipelines,

Sherwin-Williams Protective & Marine has introduced the best ways to date to mitigate the dangerous condition of corrosion under insulation (CUI) with its new line of Heat-Flex® CUI-mitigation coatings.

The line includes Heat-Flex ACE (advanced CUI epoxy), which is an ultra-high-solids epoxy novolac developed with a functional chemical enhancement for CUI mitigation. The coating performs the best at mitigating CUI out of any other formulation available. In addition, three coatings featuring a high concentration of micaceous iron oxide (MIO) pigment round out the line-up, including Heat-Flex 750, Heat-Flex 1200 Plus and Heat-Flex 650. The MIO-enhanced coatings offer significantly improved CUI-mitigation performance compared to similar formulations currently on the market.

Heat-Flex 1200 Plus

Sherwin-Williams Heat-Flex 1200 Plus offers robust CUI-mitigation protection for broad-temperature applications ranging from cryogenic to 649 °C (1200 °F). That includes on insulated pipes, valves and process vessels that face very high-temperature service and aggressive cyclic service at high temperatures. As a two-component version of the company’s original Heat-Flex 1200 coating, Heat-Flex 1200 Plus provides added mechanical resistance and corrosion protection even in extreme CX atmospheric environments. The MIO-enhanced inert multipolymeric matrix (IMM) coating is harder than any other silicone-based coating used in the petrochemical industry, providing superior protection from impacts and abrasions during transit and installation, as well as from chemical attacks and moisture penetration. At the same time, the material is flexible enough to withstand the thermal shock of assets expanding and contracting during extreme temperature fluctuations. Heat-Flex 1200 Plus also offers improved corrosion protection and mechanical resistance in extreme atmospheric environments, providing confidence of corrosion protection from the application shop to the field. The coating passes atmospheric testing without a heat cure, saving application shops the time and expense of heat curing.

Heat-Flex 650

For applications requiring high-temperature epoxy novolac phenolic coatings, Sherwin-Williams offers MIO-enhanced Heat-Flex 650. With its higher MIO concentration, the coating represents the next generation of the well-known Sherwin-Williams Epo-PhenTM FF CUI-mitigation coating. Testing proved that the combination of MIO with the epoxy phenolic resin in Heat-Flex 650 provides improved crack and UV erosion resistance compared to traditional epoxy phenolics, with the coating showing positive results for use on pipes, valves and vessels operating from cryogenic temperatures to 205 °C (401 °F). The coating has a higher volume of solids than other traditionally used high-temperature epoxy phenolics, making it a good choice for reducing VOC permitting costs.

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