Ethylene chlorotrifluoroethylene (ECTFE)

ECTFE coated carbon steel equipment

ECTFE Lining / ECTFE Coatings also known as Halar Lining / Halar Coating

ECTFE (Ethylene chlorotrifluoroethylene) is a fluorocarbon based polymer (a fluoropolymer), a kind of plastic. It is marketed under the brand name Halar ECTFE by Solvay Solexis. Solvay Solexis is the only producer of Halar.

ECTFE has excellent chemical resistance against hydrogen fluoride and ozone gas and, in addition, has excellent flame resistance, surface smoothness, film hardness, film strength, and low permeability


It offers high impact strength, chemical and corrosion resistance over a wide temperature range — typically -76°C to +150°C. It has high resistivity and low dielectric constant.


ECTFE is used to minimize wear in high-friction applications, where dimensional stability is a requirement.

ECTFE, a copolymer of ethylene and chlorotrifluoroethylene, is a semi-crystalline melt process able partially fluorinated polymer. It is available in different grades that are specifically designed for electrostatic powder coating.


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 including:

  • • Vessels
  • • Reactors
  • • Semiconductor chemical storage tanks and ductwork
  • • Piping systems
  • • Centrifuges
  • • Agitators
  • • Exhaust hoods
  • • Filters
  • • Electroplating equipment

Pharma & Chemical Industry

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.

  • • Chemical resistance
  • • Barrier properties
  • • Outperform 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.

High Purity Applications

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

Fluid Handling Systems

Delivery, storage, filtration and processing are some of the steps integral to a fluid handling system. Fluoropolymers, thanks to their superior capabilties to withstand extreme chemicals and temperatures, are widely in use in semiconductor operations.

Key features

  • • Very good chemical and thermal resistance
  • • Optimum permeation resistance
  • • Outstanding flame resistance
  • • Very good surface characteristics
  • • Surface smoothness
  • • Purity

Case History :

2.3 mm ECTFE + FRVS, SO2 quench tower 1.9m Diam x 8.9m Ht exported to client where technology provider was Heldor Topse. The design temperature for the same was 120 Deg C, in service since 2009.

2.3 mm ECTFE lining on MS filter for severe application.

2.3 mm ECTFE + FRVS, 200 Liter storage tank of 0.6m Diam x 0.7 m Ht for storage of Ammonia Bifluoride @ 90 Deg C in 2005 & 2006


Dimensions of the ECTFE coated distributor
Diameter : 2900 mm x Height : 1000 mm

Plate on top of the distributor have number of holes which was a challenge during ECTFE coating, we had to make sure that the complete plate with all holes are coated properly.

ECTFE Lining
ECTFE Lining

ECTFE coated carbon steel equipment for 96% sulphuric acid (H2SO4) application used by wet sulphuric acid plant based in Indonesia for a renowned pulp & paper mill. Inside partition plate has to be designed properly in order to take care of the hydrostatic load when filled partially.

800 micron coating of good quality works very well for this application with average service life of 8- 10 years.

ECTFE Lining

Volume : 7 KL

Diameter : 2200 mm

Height : 1900 mm

2.3 mm ECTFE lined with FRP using Derakane 470-300 Momentum resin used for manufacturing ducting connected to SO2 quench tower working at high temperature of 120 Degree Centigrade. SO2 gas at high temperature is quiet corrosive & ECTFE is highly resistant for this application.

ECTFE Lining
ECTFE Lining

Volume : 7 KL

Diameter : 2200 mm

Height : 1900 mm

Diameter of ducting : 1500 mm , total length : 60 meters & 900 mm diameter with 20 m length

2.3 mm ECTFE lined FRP straight piece of ducting portion, total length of the ducting is 65 meters. This is on of the biggest ECTFE jobs done in India. Single project has consumed more ECTFE sheets than the complete consumption in India.

( This data is provided by ECTFE Sheet supplier )

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