Surface treatment on aluminium
  • SM4RZW
    0
    Silver on Nickel on Aluminum is classical for uwave parts.
    But has anyone tested those Cr-containing corrosive protectant coatings, like Surtec650 ?
    Bulk resistivity, permeabilty -> effective skin depth... My gut feeling is that it will be bad...
    SM4RZW Options
  • UnknownEditor
    4
    Is this for waveguide?
    UnknownEditor Options
  • epos
    0
    Surtec650 for RX-purpose waveguide works just fine. Scratch resistance is not on par with proper silver plating though.
    epos Options
  • Desert Sage
    0
    That "classic" uwave finish definitely did NOT apply for narrowband high-Q filters. Nickel was a big BIG no-no. We could even see detrimental effects (higher insertion loss) from the use of organic brighteners in the silver plate. I once evaluated many finishes applied to a standard cavity. The results are as you would expect; silver is best and things degrade rapidly with any changes. Silver is better than aluminum (bare) which is better than chromate conversion coated aluminum. Ultimately, I guess I cannot determine the meaning of your question.
    Desert Sage Options
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