EMI Vent Panel Manufacture

Part of the process in manufacturing or Aluminium honeycomb EMI ventilation panels is welding of the aluminium frames. This is done in house using TIG (Tungsten Inert gas) welding. “U” channel frames are notched and folded to shape with a weld in one corner only but “h” shape frames have to be cut to length with mitred corners and welding in all 4 corners.

Finishes
EMI vent panels can be supplied with a range of finishes including:

• Surtec 650 Trivalent chromium (RoHS compliant)
• Tin or nickel plating
• Painted
• Alocrome 1200 Hexavalent chromium (not RoHS compliant)

Kemtron’s standard finish (Surtec 650) for aluminium vent panels fully meets the RoHS directive. Kemtron’s in-house process applies a trivalent chromium passivation. The surface finish is conductive with a low contact resistance and meets all requirements of MIL-C-5541F Type II Class 3 for corrosion resistance and electrical conductivity. We are also able to offer a comprehensive range of painted finishes to complement our standard Surtec 650 finish. Using industry leading wet paint solutions from Trimite, we offer full painting and preparation to DEF STAN specifications including matt and gloss finishes. In addition we can also offer Infra Red Reflecting (IRR) matt finishes complying with DEF STAN 00-23, 80-166 and STANAG 2338.

For less critical / commercial applications requiring a protected finish we recommend polyester powder coating. This is tough material that offers excellent resistance to fresh and saltwater, petrol, linseed and penetrating oils, along with limited resistance to various acids. We are happy to advise on specific examples if required. As the epoxy process is an electrostatic method, it offers excellent penetration of the honeycomb cells, further aiding resistance to corrosion. With both processes, we are able to offer a full range of colours to RAL/BS charts.