Chemical/Corrosion Resistant Coatings
Chemical processing equipment such as filter tanks, small vessels, valves, reactors mixer blades and flanges piping have been successfully coated by Orion for wide range of manufacturers. These savage corrosive and high temperature environments are combated with a multi-coat application of one of many fluoropolymers such as PTFE coatings, Kynar® coatings, Halar® coatings, ECTFE and ETFE. Orion focuses on the preparation of the metal substrate prior to the application of the coating, as it is the foundation of the coating adhesion necessary in these environments.
Halar® or ECTFE (Ethylene Chlorotrifluoroethylene) corrosion coatings are an excellent choice for neutral to acid corrosion applications ranging from -105°F to 300°F in temperature. Halar is a thermoplastic coating that can be as thin as 15 mils and as thick as 60 mils and provide excellent corrosion protection with a pin hole-free film. Halar has high impact strength, has high electrical resistivity along with a low-dielectric constant.
Tefzel® or ETFE (Ethylene Tetrafluoroethylene) is considered one of the most durable fluoropolymer coatings. This coating has excellent corrosion resistance because it is a non-porous film capable of operating at -100°F to 300°F. It withstands both alkaline and acid-based solutions but should be tested prior to specifying this coating. Tefzel is available in FDA-compliant formulations. It can be applied from 5 to 25 mils thick. Tefzel can be applied to carbon steel, aluminum, stainless steel, and other premium metallic substrates.
Kynar® – PVDF (Polyvinylidene Fluoride) is a very durable coating for corrosion applications and can withstand temperatures up to 275°F. It is used to line tanks and storage containers. The coating thickness range is from 3 mils to 20 mils. It can be applied to most metallic and non-metallic substrates. PVDF has excellent dielectric strength and also dielectric constant.
Teflon® - PTFE (Polytetrafluoroethylene) – PTFE is the first Teflon® ever invented by Chemours. It is an extremely versatile coating and can be used as a corrosion-resistant coating because of it’s inert properties. It is heat resistant to 500°F and chemical resistant up to 300°F in most cases. It is applied in a multi-step process and the film build can be thin as 2 mils or up to 8 mils. The only chemicals that may have a negative effect are molten alkalines and high-reactive fluorinating agents. PTFE offers good electrical insulation and a low dissipation factor.