Solvay Halar® ECTFE Coatings

Halar® ECTFE is particularly suitable for use as a coating material in chemical protection and anti-corrosion applications due to its unique combination of properties. It is resistant to strong mineral and oxidizing acids, metal etchants, liquid oxygen, alkalis, and essentially all organic solvents except hot amines. Halar® ECTFE, a copolymer of ethylene and chlorotrifluoroethylene, is a semi-crystalline melt processable partially fluorinated polymer.

Halar® ECTFE coatings have been used successfully for fire safety and corrosion protection of exhaust duct systems that must meet the FM4922 fire safety standard. Halar® ECTFE coated ductwork offers exceptional surface smoothness reducing or eliminating buildup and corrosion.

Please contact us for more information about Solvay Halar® ECTFE Coatings.

Key Performance Properties

  • Excellent chemical and corrosion resistance
  • Very good thermal resistance (cryogenic to 300°F)
  • Suitable for High Purity Systems
  • Excellent dielectric strength
  • Hydrophobic
  • Low coefficient of friction
  • Water absorption less than 0.1%
  • Thick films are achievable
  • Permeation resistance
  • Excellent weatherability
  • Surface smoothness

*See below for more detailed information


Chemical Resistance Properties
Halar® ECTFE exhibits excellent barrier properties; 10 to 100 times better than those of PTFE or FEP to oxygen, carbon dioxide, chlorine gas or hydrochloric acid. Halar® ECTFE resists a wide variety of corrosive chemicals and organic solvents, including strong acids, chlorine and aqueous caustics.

Electrical Properties
The dielectric constant of Halar® fluoropolymer is low and stable across a broad temperature and frequency range. The dielectric strength is 2000V/mil (80 kV/mm) in 1 mil thickness.

Halar® ECTFE meets UL 94 V-O flame test in thicknesses as low as 7 mils (0.175 mm). When placed in a flame, unlike most thermoplastics, Halar® ECTFE does not melt or drip. Char is formed, which serves as an oxygen and heat transfer barrier. On removal of flame, it immediately extinguishes. It will not ignite or propagate flame in atmospheres which contain up to 52% of oxygen. Halar® ECTFE has excellent low smoke properties.

Halar® ECTFE is a thermoplastic material and easily machined, with machinability similar to Nylon.

Mechanical Properties
Halar® ECTFE possess excellent mechanical properties over a wide range of temperatures from cryogenic to 300°F (150°C). It has nylon-like durability and provides excellent impact resistance at ambient and sub ambient temperatures. Halar® ECTFE has good tensile, flexural, and wear-related properties.

Static soak testing in Ultra-Pure Water (UPW) and High Purity Chemicals show extremely low levels of metallic and organic extractables. Additional dynamic rinse data also validates Halar® ECTFE as a material suitable for high purity systems in the semiconductor, biotech, and pharmaceutical industries.

Thermal Properties
Halar® ECTFE fluoropolymer is UL certified for use in non-load bearing applications requiring continuous service at temperatures to 300°F (150°C).

Markets and Applications

Typical applications served by Halar® ECTFE include those in contact with highly corrosive or ultrapure chemicals such as strong inorganic bases and strong mineral and oxidizing acids. Some applications include:

  • Vessels
  • Reactors
  • Semiconductor
  • Ductwork
  • Piping systems
  • Centrifuges
  • Agitators
  • Exhaust hoods
  • Filters
  • Electroplating equipment

*See below for more detailed information


High Purity Applications
Static soak testing conducted on Halar® ECTFE in ultrapure water and high purity chemicals shows extremely low levels of metallic and organic extractables. Additional dynamic rinse data validates Halar® ECTFE as suitable for high purity systems in the semiconductor, biotech and pharmaceutical industries. Halar® ECTFE exhibits very low fluoride ion leach out.

Exhaust Duct Coatings
Halar® ECTFE coated stainless steel exhaust duct systems are designed to handle a wide range of corrosive exhaust streams found in a variety of industrial applications, including clean rooms. Halar® ECTFE provides the following benefits to exhaust ducting:

  • Chemical resistance
  • Corrosion resistance properties
  • Outperforms plastic and FRP duct with improved safety and corrosion resistance
  • Reduction or elimination of the buildup of salt deposits and debris that can reduce airflow. Approved by Factory Mutual for use in fume and smoke exhaust systems without sprinklers.

Pulp & Paper Industry
Halar® ECTFE has a history of success as a protective coating in aggressive environments due to the fact that it is not sensitive to pH, moisture, or strong oxidizers and it is not attacked by a broad variety of chemicals. Halar® ECTFE powder coatings deliver seamless and smooth corrosion protection.

Halar® ECTFE coatings meet stringent standards for purity, chemical resistance, and thermal stability demanded on semiconductor processing equipment and in clean rooms. It is widely used in the semiconductor industry on vessels, process equipment, racking/fixturing devices, and exhaust duct systems. Halar® ECTFE purity, surface smoothness, chemical resistance, & fire resistance are key characteristics for the semiconductor market.

Fluid Handling Systems
Delivery, storage, filtration and processing are some of the steps integral to a fluid handling system. Halar® ECTFE is widely used on components used in the fluid handling industry because of its superior ability to withstand extreme chemicals and temperatures. Halar® ECTFE coatings are the best choice for key components such as: valves, pipe, tanks, vessels, and heat exchangers.

Waste Disposal
Waste products from many industries are likely to be corrosive, ignitable, reactive and/or toxic. Halar® ECTFE offers superior performance and resistance to acids used in etching, stripping and cleaning processes, as well as abrasion resistance to slurries and effluents. Storage containers, piping and fittings, agitators, valves and other components coated with Halar® ECTFE provide reliable performance for waste disposal systems.

Property Test Method Units Halar® Melt Processable
Melting point, min. ASTM D3418 °C 242
Specific gravity ASTM D792 °C 1.68
Water absorption, 24h @ 23°C ASTM D570 % <0.1
Tensile stress at yield @ 23°C ASTM D638 50mm/mm Mpa 30-32
Tensile stress at break @ 23°C ASTM D638 50mm/mm Mpa 50-55
Modulus ASTM D790 2.5mm/mm Mpa 1,600-1,800
IZOD impact notched V 10 mm @ 23°C ASTM D256 J/m no break
Abrasion resistance TABER CS 17/0.5 kg   5
Friction coefficient ASTM D1894 mg/1,000 rev 0.1-0.2
Hardness D2240 Shore D 50-65
Volume resistivity ASTM D257 Ω.cm >1-1016
Linear thermal expansion coefficient ASTM D696 10-6/K