ACID & ALKALI
Exceptional resistance to aggressive chemicals, including concentrated acids and strong oxidizing agents.
Sulfuric AcidStable
Nitric AcidStable
Sodium HydroxideStable
TECHNICAL SPECIFICATION 02
HALAR
ECTFE
Technical specifications for Halar® ECTFE (Ethylene Chlorotrifluoroethylene) coatings. Specialized high-purity chemical barrier protection for industrial process equipment in Mumbai.
PURENESS99.9%
PH RANGE1 - 14
Chemical Resilience
ENGINEERING PROPERTIES
LOW PERMEABILITY
Offers a dense molecular structure that prevents gas and vapor penetration.
Oxygen Trans.Very Low
Water VaporInsignificant
ULTRA-HIGH PURITY
Extremely smooth surface prevents bacterial growth and contamination in sensitive sectors.
Surface FinishSub-micron
Leachable IonsNone
P1
ELECTROSTATIC CHARGE
P2
FLUIDIZED BED
P3
SINTERING PROCESS
APPLICATION
MASTERY
Halar application requires precise thermal management. We utilize advanced electrostatic powder systems to achieve thick, pinhole-free barriers. The sintering process is conducted in electronically controlled ovens to ensure uniform fusion of the ECTFE particles into a continuous protective barrier.
HALAR® FAQ
Technical answers regarding Halar ECTFE application, substrate preparation, and performance limits.
What surface profile (roughness) is required before electrostatic powder application of Halar?
We grit blast the metal substrate to a near-white metal finish (SSPC-SP10 / NACE No. 2) to achieve a sharp, angular surface profile of 50 to 75 microns (2.0 to 3.0 mils). Proper profile is critical; without it, the thermoplastic Halar polymer will experience shear-induced delamination during thermal expansion cycles.
How do you verify that a high-thickness Halar barrier coating is pinhole-free?
For chemical immersion service (such as pharmaceutical reactors or acid scrubbers), we conduct wet spark testing (holiday detection) using high-voltage DC spark testers per ASTM D5162. The voltage is calibrated to the dry film thickness (typically 100 to 125 volts per mil of coating thickness) to identify micro-porosities without damaging the fused polymer matrix.
What is the continuous service temperature limit for ECTFE coatings in contact with highly concentrated acids?
Halar ECTFE provides continuous thermal stability up to 150°C (300°F). However, in contact with strong oxidizers like hot concentrated nitric acid or wet chlorine gas, the service limit should be derated to 120°C to prevent oxidative degradation and chemical permeation of the lining.
Can Halar be applied over cast iron or copper alloy components?
Cast iron can be coated provided it undergoes thermal outgassing (pre-heating at 300°C) to release trapped air pockets within the porous casting that would cause blistering. Copper-base alloys cannot be coated directly because copper accelerates the thermal degradation of the ECTFE resin during the 275°C sintering cycle. An intermediate nickel or stainless steel plating barrier is required.
What is the typical thickness tolerance achieved during industrial Halar coating?
For protective barrier coatings, the target dry film thickness (DFT) is typically between 600 to 1000 microns. We achieve a nominal tolerance of ±10% using electronic magnetic-induction gauge systems calibrated per ASTM D7091.
CHEMICAL RESISTANCE
Deploy Halar ECTFE to protect your most critical chemical processing equipment.