Re: TINING PREP FOR LEADING

Posted by mike Flanagan on July 30, 1997 at 00:35:29

In Reply to: TINING PREP FOR LEADING
posted by JOE HUGH on July 27, 1997 at 23:00:21

: My '28 tudor gas tank has rust pits completely thru in the weld area where the windshield frame rests on the tank.I have carefully sandblasted these pits and then used muriatic acid in prepartion for leading.I am having trouble tining down inside the pits.You can't sand down into them; you need some kind of chemical treatment.I rinse off the muriatic, then applly the liquid solder flux; it doesn't work that well.I want it to flow on like it does with copper and brass.Any help is greatly appreciated.
Joe, I believe I read somewhere that the tanks were "tern' coated. If so you will have no success soldering or brazing to the surface. The pans to modern automatic transmissions are "tern plate" which is the same situation and in trying to attach a drain plug by brazing I had no success at all. Once I cranked the heat up and welded the plug to the plate with copper clad rod I had no problem but no amount of prep would allow solder or brazing to adhere. The problem is the process. Brazing and soldering are adhesion processes while welding is fusion. By welding the "tern" coating is effectively incorporated into the fusion process.
If another tank is close and in your budget you might be well advised to go that route.
Mike flanagan, The Model A Fool.

Follow Ups:
Re: TINING PREP FOR LEADING JOE HUGH August 03, 1997 at 20:36:13(0)

E-Mail Comment to Webmaster