Requirements for Substrate Preparation for BryCoat Thermal Spray Coatings

Substrate Materials that can be coated

• Steels, tools steels, high speed steels
• Stainless Steels
• Titanium alloys
• High temperature alloys, Nickel alloys, Cobalt alloys, NiCr, etc.
• Copper alloys, Beryllium Copper, Aluminum Bronze
• Carbide, ferro-tic and cermet
• Aluminum alloys

Substrate Material Requirements

• Note that the parts must be held somewhere.  Therefore it is impossible to “coat all over” without leaving any kind of fixturing mark.  BryCoat has worked with customers to provide creative ways to achieve virtually total coverage.
• Parts should be properly packaged to avoid damage during shipment.  BryCoat will usually return the parts using the same packaging they were received in.
• Previously coated parts can be recoated over the original coating, or stripped of coating and then recoated.
• Parts must be able to withstand the coating process temperatures.  Although the coating spray may be at very high temperature, the substrate part temperature is controlled through cooling.  Typically, the substrate part does not heat up above 300-400°F.  Let BryCoat know if the parts have temperature limitations.

Design Considerations for Thin Film Coatings

• All exposed areas will receive coating.  To prevent coating in some areas of the part, masking is required.  Depending on the complexity of the geometry, masking can be expensive.  Please consult with BryCoat on your specific needs.  We recommend that you specify these areas on your part drawings:
  • The critical working surfaces where the coating provides a performance benefit
  • Any other surfaces that must be coated
  • Those surfaces that must not receive any coating (i.e. that must be masked).
  • Those surfaces where coating is optional.
• BryCoat can then determine the best fixturing and masking plan to meet your requirements at an economical price.
• Thermal spray coatings are applied by a line-of-site process.  The gun must be able to spray directly at the surface requiring coating.  BryCoat has ID guns and technologies for internal areas of parts and other geometries.
• Thermal spray coatings are thicker films with typical thicknesses of 0.006”.  Therefore, allowance for the thickness of the coating must be made in the parts dimensions and tolerances.
• Thermal spray coatings require a clean, rough surface for proper adhesion.  Roughness is normally achieved by grit blasting at BryCoat prior to coating.
• The thermal sprayed coatings are not smooth enough for some applications (48 to 128 microinch Ra is typical finish).  In some cases, the coatings are polished or ground after coating to finished surface requirements or dimensions.
• Proper call out for coatings includes coating material specifications, process, test requirements and specifications as well as thickness and coverage tolerances.  Consult BryCoat for suggested drawing callouts in your industry.

See Also :

• Thermal Spray Coatings
• HVOF
• Plasma Spray
• Wire Arc
• Flame Spray
• Thermal Spray Coatings—Carbides
• Thermal Spray Coatings—Ceramics
• Thermal Spray Coatings—Metal Alloy Coatings
• Thermal Spray Coatings—Abradable Coatings
• Thermal Spray Coatings Technology Description
• Guide to Substrate Preparation for thermal spray coatings
• Thickness Conversion Chart
• Temperature Conversion Chart
• Hardness Conversion Chart
• Hardness Measurement