|BOB BLACKSHAW||02/07/2018 11:18:17|
|334 forum posts|
I made a mistake on a brass part that can be repaired with a fill in of silver solder using Easy- Flow flux, all went well on this yesterday.
Today making another using the same brass I again made the same mistake, but this time the solder would not take it just run off in ball. I cleaned the brass using a wire brush and diamond needle file as yesterday, tried several times but would not take.
I've muck it up now by using a brazing rod which did take but melted the edge of the job.
Any idea why the silver solder worked a treat on one but not the other, as they came off the same 44mm round brass.
|Mick B1||02/07/2018 11:44:33|
|1717 forum posts|
Did you use enough flux? In my own tentative forays into silver soldering I've found I had to paint on quite a coating.
Still scares me, and I'll bolt the joint instead if I can...
|Brian Sweeting||02/07/2018 12:00:58|
|442 forum posts|
You say that you melted the end of the job.
If you overheat the base then the filler will simply run off, the flux has already benn burnt away.
|BOB BLACKSHAW||02/07/2018 12:15:16|
|334 forum posts|
I melted the edge of the job when using a brazing rod, but that did take, not the silver solder.
|CuP Alloys 1||02/07/2018 14:37:37|
258 forum posts
Email details to me with the grade of silver solder you are using.
If the solder melts but don't wet the brass you have a flux problem. The flux is not compatible with the solder/heating technique/parent materials.
|Bob Stevenson||02/07/2018 16:18:06|
|432 forum posts|
Either contamination or a flux failure.....
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