Tech-Master NIB TV Kit #5516

[Crist Rigott]

Originally Posted by Findm-Keepm

Vinegar works well too. You didn't remove the cadmium plating (unless the Brasso polishing did) - you removed the chromate salts they used to passivate the cadmium onto the steel, or cadmium sulfide/sulfate - both are yellowish green. If there was one thing Navy Corrosion Control taught me, it was that Chromate salts are always a yellowish green, and that raw cadmium corrodes to a grey powder.

The yellow-green patina is harmless to electronics undisturbed, but the chromate is toxic, so removing it from something handled so often was wise. We used to spray Humiseal on just-cleaned CADPLAD chassis to keep it from corroding - spray clear krylon (remove tubes and cover sockets!) works well.

Just dispose of your simple green rags in the trash - the concentration doesn't rise to hazmat levels.

Brian,

Thanks for the tip on the vinegar and the correction on the cad stuff. The Brasso treatment was very minimal, just to even out the coloration of the metal. the WD-40 finished it off nicely.