Surface treatment on aluminium
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...
Is this for waveguide?
Surtec650 for RX-purpose waveguide works just fine. Scratch resistance is not on par with proper silver plating though.
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.
Sign in or register to add a comment.
Add a Comment
About Our Site
Biological Effects and Applications
Computer Aided Design
Emerging Applications and Technology
Filters and Passives
MMIC and RFIC
Packaging and Materials
Sources and Receivers
Test and Measurement
Surface roughness and phase delay
Group delay in a receiver
New 4-phase oscillator?
Coax Loss Calculation and Phase
Terms of Service
Useful Hints and Tips
Created with PlushForums
© 2023 Microwaves 101 Discussion Board