>>Rokide® Ceramic Spray System offers a rugged, dependable unit that features an easy to use pushbutton operation.

>>The Rokide® system uses an oxygen-acetylene flame to melt the consumable. On/off switches, conveniently located on the spray unit control the electric drive motor and gases.

>> Accommodates 3/16" (4.75 mm), 1/4" (6.35 mm) and 5/16" (7.94 mm) diameter Rokide® rods and can easily convert to accept 3/16" (4.75 mm) diameter flexible continuous cords.

>> Rokide® rods and flexible cords are available in many ceramic compositions allowing our coatings engineers and customers to choose the most appropriate formulation for a specific application.

>> Spraying of Flexible Cords can give existing Rokide® users the added capability of spraying WC ( Tungsten Carbide ) coatings and achieving continuous feed for higher volume projects.

>> The Rokide® system is very portable; coating applications in both jobshop and field operation are possible without difficulty.

>> The Stage II electric motor permits ease of operation, precise rod/cord speed control and improved production and lower costs. The motor can be activated at the spray unit giving the operator complete control. Motor converts automatically to international input voltage and frequencies.

CAPABILITIES
The ROKIDE® Spray System is unique because it utilizes ceramic oxide rods. The rods are melted in a patented spray unit which projects the fully molten particles onto the substrate. The ROKIDE particles cannot leave the spray unit until fully molten. These particles have high kinetic energy and high thermal mass, so they remain molten until they reach the substrate.

Powder systems, by contrast, project smaller particles into a high-temperature gas stream, and the resulting lack of dwell time does not allow all the powder particles to melt completely.

ROKIDE® coatings, therefore, have higher particle-toparticle cohesive bonding.

The deposit efficiency of the ROKIDE® system is not dependent on the thickness of the coating. Therefore, thicker coatings - greater than .030 inch (.8 mm) - if required, can be applied without a reduction in deposit efficiency or quality. ROKIDE® coatings can be deposited to a thickness greater than 0.060 inch (1.6 mm).

The ROKIDE® system also costs less to purchase, install, operate and maintain. The process requires no water or inert gases. Maintenance can be done in-house and does not normally require outside technical assistance.

The ROKIDE® system is more portable, makes more efficient use of materials and produces ceramic coatings with higher wear resistance, greater thermal shock resistance and better electrical insulation properties. The system is easy to set up for short runs.

How ROKIDE® ceramic spray coatings reduce costs
The ROKIDE® Process−Ceramic rods are melted, atomized and sprayed at high velocity (550 ft./sec., 170 m/ sec.) onto metal or nonmetallic surfaces. This forms a hard, chemically inert coating that can be left as is or ground to a specified tolerance. ROKIDE® rods are available in many ceramic oxide compositions for a wide range of applications. ROKIDE® rods are sprayed through portable ROKIDE® spray units driven by electricity.

These are some of the ways ROKIDE® coatings can help deliver substantial savings, improving the profitability of your business:

1. Wear resistance−ROKIDE® ceramic coatings are much harder and far more resistant to wear and abrasion than metals, making them ideal for pump components like sleeves, plungers, impellers and casings. ROKIDE multiplies service life for applications where the fluid being pumped contains sand, dirt or other abrasive particles. This reduces downtime for maintenance and greatly increases productivity.
2. Thermal barrier coatings− Some ROKIDE coatings provide a thermal barrier to protect the underlying substrate. Thus, ROKIDE coated components enhance metal with the protective properties of ceramic at temperatures up to 4500°F (2480°C) in rocket engine exhausts and jet engine components. Since ROKIDE coatings provide both wear resistance and heat resistance, they are ideal for hot extrusion dies or components in contact with molten metal.
3. Electrical insulation− Certain ROKIDE ceramic coatings offer superior insulating properties for parts used in electrical components. ROKIDE can be used in wire-wound furnace cores and copper induction heating coils for both heat and electrical insulation.
4. Corrosion resistance− Ceramics are chemically inert, even in the presence of many corrosive chemicals. This makes specific ROKIDE coatings ideal for chemical and process industry applications where metals can be attacked by the product being manufactured. Metal impellers or mixer blades coated with ROKIDE are as inert as many plastics, yet they possess the required structural strength that plastic components often lack. The combination of heat resistance and corrosion resistance makes ROKIDE coated metals ideal for many environmental applications in hostile environments.
5. Weight reduction− In applications where weight is critical, ROKIDE coatings often make a crucial contribution. A component made of steel for its heat and wear resistance can in some cases be engineered to utilize an alternative substrate coated with ROKIDE.
6. Material cost savings− Most ROKIDE coatings can give "super" properties to relatively inexpensive materials. A pump body made of expensive stainless steel can in some cases be replaced by less expensive cast iron and coated internally with ROKIDE to protect against corrosive or abrasive fluids. Value engineering can turn up numerous opportunities to reduce operating costs.
7. Reconditioning worn parts− The expense of replacing worn parts can be greatly reduced, and in some cases eliminated with ROKIDE coatings. A component is metal-sprayed to build up the worn area, then given a ROKIDE coating and ground to tolerance before reinstallation. Parts can often be reconditioned on location, saving the costs of removing, transporting and reinstalling.

How ROKIDE® coatings are applied
The surface to be coated is given an initial grit or pressure blasting with aluminum oxide to clean and roughen it. For proper roughening, the surface should have a hardness less than Rockwell C−50. This assures maximum adherence of the ceramic coating that may range from .005" (.127 mm) to 0.060 (1.6 mm) thick. Grit blasting is followed with a nickel chrome or other undercoat for increased bond strength and to minimize problems associated with the differential of thermal expansion between metals and ceramics. The base material should be able to withstand coating temperatures of 200-350°F (90-175°C).

Finishing ROKIDE® coatings
ROKIDE coated surfaces can be ground to excellent surface finishes. They can be ground to as low as 2 to 4 RA using standard grinding equipment with properly specified silicon carbide or diamond grinding wheels. Flatness readings of less than 3 helium light bands are achievable using standard industrial lapping equipment. Complete information on proper ceramic grinding and lapping techniques can be provided.

Composite coatings
ROKIDE ceramic coatings, in conjunction with metal spray coatings, can be applied to metals to form a metal/ ceramic composite with a controlled thermal gradient. This technique has proven successful in producing composites with varying heat transfer and insulation characteristics required for such applications as underwater plastic extrusion dies.

Impregnating ROKIDE®
coatings For special applications where enhanced electrical or corrosion resistant properties are required, impregnants can be used to fill the 1-2 micron pores of some ROKIDE coatings. Epoxy, phenolic, polyester and silicone resin sealants have been used successfully.