Concept Surface Engineering’s Extreme Coatings™ process utilizes emerging thermal spray technologies to apply extremely wear resistant and/or corrosion resistant protective coatings to virtually any size injection molding or extrusion feed screw. Our process provides crack free coatings with hardness values ranging from 30- 70 on the Rc scale in thickness’ from .001”-.030”. Proprietary compositions of various carbides, ceramics, and alloys are incorporated to achieve abrasion and corrosion resistant characteristics unmatched by any of the conventional hardfacing alloys popular today. This process completely eliminates the necessity for chrome plating, flame hardening, or nitriding, as the entire screw surface is coated, including the root, flight sides and flight lands. We offer a variety of root and flight side surface finishes ranging from +/-140 RMS to our 16-32 RMS finish, which rivals chrome plating in appearance. We also finish grind to dimension and have the capability to strip coated screws for rebuild when worn. The coatings are excellent for screws exposed to filled resins, rubbers, or other abrasive compounds. Additionally, corrosion resistant coatings are available eliminating the need to fabricate components from costly raw materials. Furthermore, the process requires no preheat or post heat procedures and during application, components rarely exceed 350° F. The low heat input helps prevent distortion, minimizing costly straightening or machining time. Preparation for screw coating requires rebuilding or manufacturing to predetermined dimensions based on coating thickness desired. We work through your current screw manufacturer to provide this service. Therefore, it is not necessary to change vendors Another unique characteristic of the process is the capability to rebuild CPM (¹) screws, provided wear is limited to approximately .015” per side or .030” overall. Other applications where this process is currently utilized include turbine components, bushings, shafting, mixer blades, chutes, fan blades, conveyors, slurry pumps, and many other applications where extreme conditions of wear or corrosion exist. (¹) “CPM” is a registered trademark of Crucible Specialty Materials