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PPG Coatings Receive Corrosion Certification
Global coatings manufacturer PPG (Pittsburgh) recently announced that its PSX polysiloxane coatings were successfully tested to receive C4H certification for corrosion protection.
The requirements for the certification are under the ISO 12944-6:2018 international standard for corrosion protection of steel structures by paint systems. C4 classification indicates a highly corrosive exposure environment, such as industrial and coastal areas with moderate salinity and interior exposure environments like chemical plants, natatoriums and coastal shipyards and boatyards.
PPG reports that its PSX700 and PSX805 coatings that were applied directly onto metal in a single coat demonstrated corrosion resistance that meets high C4 requirements, estimating a durability range of 15-25 years. According to the release, PSX coatings use a polysiloxane resin technology from Dow to provide long-term corrosion, weathering and chemical resistance in exposed steel applications.
“C4H certification is a significant achievement for the PPG PSX coating portfolio,” said Scott Doering, Director of Sales and Technical Service, Protective and Marine Coatings, U.S. “It confirms the long-term protection these products can offer for steel assets in even very challenging conditions with fewer coats. We’re proud to offer customers this unique combination of high performance with lower environmental impacts.”
While other coatings may require multiple coats, PSX topcoat or two-coat PSX coating systems with a zinc primer reportedly require fewer coats for this level of protection, saving material costs, energy for production and application and fewer recoats over time.
Additionally, PPG notes that the coatings are ultra-high solids and isocyanate-free to meet emission regulations. They also reportedly offer excellent color and gloss retention with resistance to fading, chalking and general deterioration over time.
