Posted by Dai Fledermaus on 19/12/2014 16:03:08:
As a callow youth, I seem to remember having no problems soldering fuel tanks together from galvanized tin plate for some of my control line models, but at the moment I can't seem to keep my soldering iron clean enough for more than a minute or two to solder some undercarriage legs together.
I've bought and tried various paste type flux, but the copper tip of my 70watt iron soon goes black, so I have to stop, let it cool and clean it up again to a bright copper finish only for the same thing to happen again. Time consuming and very frustrating.
The only flux I haven't tried is Bakers Fluid, only because I can't buy it locally. Could this be the answer?
Hi Dai, it sounds like you have the iron set to high if the tip turns black quickly after cleaning and tinning it, you mentioned you use to solder "galvanized Tin plate" it is either galvanised or tin not both, galvanised is coated in zink and tin is coated with ti.
if it was tin plate then it is easy to solder but Galvanized plate is harder, a thing to watch out for is the fumes that come off Galvanized plate are not good to breath so try not to end up breathing them.
It is much easier to use bakers fluid to solder plate items than to use cored solder but always remember to remove all the flux after you finish soldering, the best way is with warm water for most people.
I know you are meant to wash it off with an acid but for most of us we do not like to keep acid around the home and water removes almost all of it
good luck with your project,
Regards Poppy Ann.