New Product Announcement: CUI-Mitigation Coatings

TUESDAY, SEPTEMBER 12, 2023


Sherwin-Williams Protective and Marine recently announced its new line of Heat-Flex corrosion under insulation-mitigation coatings

According to the company’s news release, the new line has been developed with a functional chemical enhancement for CUI mitigation, including three coatings with micaceous iron oxide pigment.

The new Heat-Flex lineup of MIO-enhanced CUI-mitigation coatings reportedly include:

  • Heat-Flex 750: Enhanced with MIO, Sherwin-Williams Heat-Flex 750 is a two-component, high solids alkylated amide epoxy (AAE) coating that offers excellent protection from CUI for long-term asset durability; 
  • Heat-Flex 1200 Plus: Sherwin-Williams Heat-Flex 1200 Plus offers robust CUI-mitigation protection for broad-temperature applications ranging from cryogenic to 649 degrees Celsius (1,200 degrees Fahrenheit); and
  • Heat-Flex 650: Finally, for applications requiring high-temperature epoxy novolac phenolic coatings, Sherwin-Williams offers MIO-enhanced Heat-Flex 650.

“The battle against CUI is never-ending, as coated steel encapsulated in insulation will inevitably corrode over time. Our goal is to mitigate that corrosion process for as long as possible, and we’ve developed some high-performance coatings that enable just that,” said Mark Rubio, Energy Business Manager, Sherwin-Williams Protective & Marine.

“For example, Heat-Flex ACE is the best product we’ve tested for long-term CUI mitigation. We anticipate it becoming a preferred specification solution as the industry gains experience with this enhanced CUI-mitigation system. We have also boosted the market’s CUI-mitigation capabilities for existing specifications with the three MIO-enhanced Heat-Flex coatings.”

Heat-Flex 750, Heat-Flex 1200 Plus and Heat-Flex ACE also reportedly showed positive results after ISO 12944-9 CX cyclic anticorrosion testing. Additionally, Heat-Flex ACE showed exceptional results in a series of CUI simulation tests performed in accordance with ISO TM21442 in excess of 400 F.

The release states that Heat-Flex ACE, a two-component, organic, ultra-high-solids epoxy novolac coating is solvent free. According to Sherwin, most other CUI-mitigation epoxies have between 60-80% volume solids.

Heat-Flex ACE can reportedly reduce the release of volatile organic compounds for better environmental conservation and reduced permitting costs for applicators. Additionally, the coating has reportedly been created with a functional chemical enhancement and is free from the flake-filled pigmentation.

In testing, Heat-Flex ACE reportedly displayed exceptional temperature, corrosion, chemical and mechanical resistance, while providing versatile DFT range.

“When we tested Heat-Flex ACE in the lab, we decided to test it vigorously to try to break it and found it was quite unique,” said Rubio. “Following those promising results, we have confirmed the coating’s robust performance as a more dependable and longer lasting organic coating solution. This has led to the product being added to customer specifications.”

Additionally, Sherwin enhanced three existing formulations by adding MIO reinforcements. Each coating reportedly contains a minimum concentration of 25% MIO pigment by weight in the dried coating film, helping extend the life of the coatings and reducing risk by addressing typical CUI failure mechanisms experienced while in service and during shipping and construction.

“The coatings’ heavy load of MIO reinforcements provides greater durability against impacts, chemicals and corrosion when coated assets are insulated and placed into service,” said Rubio. “In addition, the MIO provides enhanced UV erosion resistance, which protects the epoxy-based coatings from degrading before insulation is installed on assets.”

All four Heat-Flex CUI-mitigation coatings, according to the release, have passed lab testing, indicating good to excellent performance in a number of tests. These tests reportedly included various heat cycling, simulated CUI, BS EN 927-6:2016 erosion and dry film thickness (DFT) tolerance testing for thermal resistivity performed on all coatings, as well as cryogenic testing performed on the MIO-enhanced coatings.

Heat-Flex 750, Heat-Flex 1200 Plus and Heat-Flex ACE also reportedly showed positive results after ISO 12944-9 CX cyclic anticorrosion testing. Additionally, Heat-Flex ACE showed exceptional results in a series of CUI simulation tests performed in accordance with ISO TM21442 in excess of 400 F.

   

Tagged categories: 100% solids coatings; Asia Pacific; Coating Materials; Corrosion; Corrosion protection; Corrosion resistance; Corrosion Under Insulation (CUI); EMEA (Europe, Middle East and Africa); Epoxy; Latin America; New Product Spotlight; North America; Sherwin-Williams; Z-Continents

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