| PATENT CLAIMS |
Corrosion-resistant material comprising a Cu base metal having a heat created corrosion resistant intermetallic surface layer formed by applying a tin alloy to surface of base & subsequently removing at least a portion of said tin alloy with NO3H contg oxidizing soln., to at least partially expose said heat created intermetallic layer, said layer is formed by coating said Sn alloy on surface of Cu base metal by process selected from Electroplating & subsequent flow heating
Said layer comprising Cu from Cu base metal & Sn from Sn alloy, at least portion of said layer having thickness > 0.00004 inch, said Sn alloy including > 75% Sn
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