Hello,I have been doing some welding here and there, and recently I was doing some brazing in my garageUsually what I do is I take a corner magnet to stand the two pieces together how I wantExcept this time, these pieces of metal would not stick to the magnet, not even slightly.I purchased these pieces as 'drop pieces', so I have no idea what alloy they are and so onBut I find this highly unusual, I wasn't aware that there was such a thing as metal that was not magnetic.I proceeded to braze the pieces together, instead of using a magnet I used a wrench to physically hold it in placeI got it good and brazed in place with my solder, the solder DIDN'T STICK!Another perplexing idea to meI would imagine that searing hot metal oozing upon other pieces of metal at 1000 degrees F would certainly stickBut it didn'tAny thoughts?
Most metals aren't magnetic (only iron, nickel and cobalt at room temperature afaik) but the solder may not have stuck to the aluminium because of the oxide layer on the aluminium forming very rapidly (even after scrubbing it clean and leaving it for a while)You need to scrub it clean before soldering, eg with steel woolThe heat will cause it to oxidise much faster, so you should try to clean it and then apply heat and solder as fast as you can.
Pearl' knows what she's talking about! Have you been using salt also to 'fasten' the dye? I'm in Australia and we have a brand called Dylon it works really wellI don't know if this brand is available where you are? If so you could try itIt doesn't dye polyester well though.
