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![]() "G.Beat" wrote in message news:naQrc.24177$zw.4857@attbi_s01... [...snip...] This patina is conductive. OOPS! Aluminum oxide, or Alumina, is very non- conductive. It is a ceramic used for as a base high Q circuits at 150 Mhz and above (stripline and microstrip). It is also what is grown on the surface of "anodized" aluminum in the anodization process. It is also why aluminum is so hard to solder. The oxide forms immediately on contact with air. Aluminum is the most reactive metal. -- Steve N, K,9;d, c. i My email has no u's. |
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