Home /
Search 🔍
the Site

Problem? Solution? Chime right in!
(perhaps the world's last 'no registration' site)


"Low-temp flux for soldering stainless steel"

July 24, 2018

Q. Hello!

I want to include stainless steel parts in some stained glass art I'm designing and will make.

I've seen low-temp fluxes that seem to be mainly a blend of "regular" flux (the sort used for soldering copper with tin-based solder when making stained glass art) plus some hydrochloric acid, a.k.a. "muriatic acid", to etch the steel. -- As a note, yes, I do have some silver-solder paste, and it works great on steel-to-steel sections, but I can't use it with glass because, to make a long story short, I end up ruining the glass.

So, here is my question:
Can I use make a concentrated citric acid solution to score just the part I want to solder, then immediately add regular flux, and then use tin or lead+tin solder, and get it to "stick"?

I have citric acid crystals and am familiar with using the stuff, so I figured I'd ask. I also have liquid "muriatic acid" for the pool, but I would really prefer to not fool around with the gallon bottles just to use a few drops.

Also, I realize that the joints will be far weaker than if I silver-soldered them all, and I also realize that any form of soldering or brazing is weaker than welding, but these are just decorative stained-glass items, not anything requiring industrial levels of support strength.

Thank you for any info!

Kris Krieger
hobbyist/artisan - Richmond, Texas, USA

Q, A, or Comment on THIS thread SEARCH for Threads about ... My Topic Not Found: Start NEW Thread

Disclaimer: It's not possible to fully diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories:

Chemicals &
Consult'g, Train'g
& Software

About/Contact    -    Privacy Policy    -    ©1995-2021 finishing.com, Pine Beach, New Jersey, USA