Stud Bolts, Nuts, Screws, Threaded Rod & Washers
Ceramic Coated Fasteners act as the building blocks to corrosion protection. The ceramic base fluoropolymer with PTFE top layer gives excellent corrosion protection and very good lubrication while tightening and hence fasteners which are used in marine and other corrosion prone areas are provided with this coating. Apart from the corrosion protection, ceramic coating gives electrical insulation and thus is also preferred in flange bolting connections in oil and gas industries.
Ceramic Coated fasteners and bolting components have the capability to address problems like chemical corrosion, galvanic corrosion, abrasion, erosion, friction and fitment.
Ceramic coating gives 3000 hours minimum of neutral salt spray test as per ASTM B117 which ensures fasteners to provide the users with the best protection under severe usage conditions. Xylar 2 is one of the most renowned basecoat manufactured by whitford for coating on fasteners.
Ceramic metal coating is used to replace normal coating system (organic coating) which can be depolymerize at temperatures on the order of 300°C. Ceramic coatings are sturdy and have a high level of lubricity, but due to oxidation concerns, they are typically use below 600°C.
Aluminium Ceramic Coated Fasteners of carbon steel and low temperature carbon steel are manufactured in accordance with Shell MESC SPE 81/010 specification in order to provide corrosion protection.
Xylar® 1 - Aqueous/Acidic Base aluminium Cermet coating which provides excellent chemical & corrosion as well as abrasion resistance at elevated temperatures.
Xylar 2 Ceramic-Metallic
Xylar 2 is an inorganic ceramic-metallic coating which was originally designed to provide the aerospace and marine industries with a product that would protect components from galvanic corrosion, high temperature, oxidisation, salt laden atmospheres, chemicals and abrasives.
Due to its thin film build and extremely high corrosion resistant properties, Xylar 2 is of particularly great use as a primer for Xylan topcoats on fasteners, threaded components and other low tolerance applications.
Excellent heat resistance (up to 650⁰C) makes it an ideal solution for engine applications where the electrical couple between dissimilar metals could result in corrosion.
Xylar 2 is also an extraordinarily hard coating that provides barrier shield against abrasive wear in applications involving coarse slurries, cavitation and stone pecking.
TAKECOAT® - CERAMIC1 is a product featuring heat resistance and long-term durability obtained by combination of the under-treatment technology and the original ceramic film coating technology. The inorganic heat resistant resin coat film is as thin as 20 to 30.um and is high in lubricity as well. When used in fasteners, its fitting is smooth, the tightening is excellent and the process ability is superior. It has been be favourably used in heat resisting parts demanding prevention of high temperature oxidation for a long term, such as bolts, nuts, washers and metal members used in heat exchangers and industrial plants.
Sermagard - From the initial dip-spin
basecoat material, SermaGard dip-spin coatings have expanded to include both organic polymer and inorganic ceramic topcoats to accommodate a wide range of performance needs.
| Properties | Values |
|---|---|
| Working Temperatures | Working temp. range up to + 260°C |
| Corrosion Resistance | Salt Spray (ASTM B117) up to 3,000 hrs (Nuts not frozen) |
| Pencil Hardness | 5H – 6H (ASTM D3363-92A) |
| Kinetic Friction Coefficient | 0.06 – 0.08 |
| Thickness | Nominal 0.001" (1 mil) |
| Impact | 160 in lb (ASTM D2794-93) |
| Adhesion | 5B (ASTM D3359-95) |
| Tensile Strength | 4,000 psi |
| Operating Pressure | Up to 100, 000 psi |