Chemical vapor deposition coating process
After a thorough surface preparation, our technicians load customer parts into a vacuum vessel corresponding to the size of the parts. This vessel is placed in a large oven and connected to the raw material – gas – then heats to temperatures near 400° C. Throughout this process, a proprietary blend of gas enters the vessel and starts a reaction which diffuses the treatment into the molecular lattice of the substrate, forming the ultra-thin SilcoTek coating that so many have come to recognize and trust.
To illustrate this, we coated a 1/16″ OD, .4mm ID tube with multiple bends both internally and externally. After coating, the tube was cut open to examine the coating at the center-most point inside the tube. In addition to the external coating on the tube, a quick visual inspection shows the vibrant purple-colored SilcoTek coating inside the narrow bore.
The thickness of the coating throughout the tube was verified by a Filmetrics F40-Series Thin Film Analyzer and confirmed to meet our specifications. SilcoTek coatings are not applied with line-of-sight processes like spraying that lead to inconsistent deposition and uncoated areas. With our process, 100% of your parts are coated, even if the design is complex or the pathways are tortuous.