Fluorocarbon coated stud bolt,Xylan Fluoropolymer Coated Stud Bolts and Hex Nuts

We are professional China manufactuer and exporter of  Fluorocarbon coated stud bolt,Xylan Fluoropolymer Coated Stud Bolts and Hex Nuts.

Fluorocarbon Coating (also refer to PTFE, Xylan, Teflon )
Fluorocarbon Coating is an organic coating consisting of solid lubricant dispersed in an organic binder and dissolved in a specially formulated mixture of solvents. It is also corrosion-resistant due to the use of a thermally cured thermosetting synthetic binding material. When applied to the substrates it resists galling, seizure and fretting and offers corrosion resistance.

PTFE coated studs have been used for many years within the bolting industry, especially in any application that requires corrosion resistance or in offshore applications (salt spray is hard on Grade B7 material). PTFE is also useful if you’ve had “galling” and need a lower breakout torque for safe removal.

fluoropolymer is a fluorocarbon-based polymer with multiple carbon–fluorine bonds. It is characterized by a high resistance to solvents, acids, and bases. The best known fluoropolymer is polytetrafluoroethylene (Teflon).

Material specifications

1. • Material specifications for stud bolts shall be in accordance to ASTM A 193 GRADE B7 matching with
2. • Heavy Hex Nut (UN) which material spec is ASTM A194 GRADE 2H.

Features:
Fluorocarbon Coating has the following characteristics:
– It is a lustrous coating.
– It has excellent adhesion.
– The effective optimum film thickness is 15-25 microns.
– Load bearing capacity: 1000 bar
– Corrosion resistance: Between 100 to 400 hours salt spray (depending upon the thickness) as per ASTM B117
– Working range: 200 °C (continuous), 250 °C short bursts

Our Fluorocarbon coating procedure on the stud bolts A193 B7

1,Remove oil according to SSPC-SP1 requirement

2,then sand blasting with aluminaaccording to SSPC-5.

3,Normally we apply the zinc plating before Fluorocarbon coating,

We also can apply zinc nickel plating as base coat and PTFE based as top coat for a better anti-corrosion performance

Fluoropolymer Coated Stud Bolts and Nuts,Blue color Fluorocarbon coated stud bolt& hex nuts

We offer high quality of ESPARRAGOS STUD BOLT A193 Grado  B7 w/2 NUTS A194 2H PTFE Xylan Coated Stud Bolts, ASTM  PTFE Coated A193 B7 Stud bolt,fluorocarbon coated stud bolts

Test Standard: Adhesion（ASTM D3359/Whitford 132C）

Hardness（ASTM D3363）

DFT Thickness （ASTM F1137)

Salt spary test（ASTM B-117）
Cure Test （ASTM D5402/Whitford 115A/115B）

Our fluorocarbon-coated bolts & nuts can meet the specifications of PETRONAS, SHELL, EXXONMOBIL, MODEC etc

Introduction about the Surface Treatment on the fasteners

For better rust prevention of the fasteners, we have in-house facility of manganese phosphating which we provide as a standard rust preventive coating. If customer requires any special type of coating, we provide any of the below mentioned coatings.

Hot-Dip Galvanizing
ASTM A153 – ISO 1461- UNI 3740 – BS 729

Electro Zinc Plating (with optional Hydrogen De-Embrittlement)
White – Yellow – Black – Green)UNI 4721 – ASTM B633 – BS 1706

Ptfe – Fluorocarbon Coating
Xylan 1070 Blue / Green / Red / Yellow

Ceramic Filled Fluorocarbon Coating
Xylar 1 or Xylar 2 and Xylan 1070

Aluminizing
ISO 2063

Pickling & Passivation
ASTM A380

Chromium / Zinc Coating (Dacromet 320 / 500)
ASTM F1136

Electro less Nickel Plating
ASTM B733

Nickel Plating
ASTM B689

Mechanical Zinc Coating
ASTM B695

Electro Zinc/Nickel Plating
ASTM B841

Electro Zinc/Cobalt Plating
ASTM B840

Zinc Phosphate Coating / Manganese Phosphate Coating (with optional Hydrogen De-Embrittlement)
ASTM F1137

Electro Cadmium Plating
ASTM B766