Letter 24006

DISCOLORATION OF BRASS WHEN SOLDERING  

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WHEN SOLDERING .032 BRASS TO .032 BRASS USING A 60/40 FLUX CORE SOLDER ALONG WITH STAY CLEAN SOLDERING FLUX THE BRIGHT BRASS FINISH WILL DISCOLOR TO A PATCHY REDDISH COPPER COLOR IS IT POSSIBLE TO GET THE BRASS TO SOLDER WITHOUT THE DISCOLORATION? WE USE A HIGH WATTAGE SOLDERING IRON.

THANK YOU,

ROBERT HERMAN
- PORT ORANGE, FLORIDA

December 27, 2008

Sounds like you are burning or etching away the zinc in the alloy.

Check with a brass supplier regarding a the proper solder and temperature to solder this material as it sound like it is possibly getting too hot.

A protective coating over the brass around the join may help, as may heat sinking the metal nearest the joint. Cool Jewel, a jeweler's compound for protecting stones and fittings near solder joins is one possibility.

Charles M. Barnard
- Menomonie, Wisconsin

July 31, 2009

Is there a way to remove the copper that has come to the surface after soldering brass?

Jann Greenland
- Little Rock, Arkansas

Dear reader

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