In my experience nickel is NOT easy to solder to at all. -----Original Message----- From: Victor Hernandez [mailto:[log in to unmask]] Sent: Thursday, August 29, 2013 2:53 PM To: [log in to unmask] Subject: [TN] Solder joint failure Fellow TechNetters: Should I be concern with an electroless matted nickel plating over an aluminum sheet metal surface and solder onto a copper heat tube? I recall something about directly soldering onto a nickel surface. Beside nickel oxidation. Any suggestions would be greatly appreciated. Victor, ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________