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Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

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Organic removal from gold

I am wanting to clean any organics inside of a gold metal package. I was curious if H2SO4:H2O2 will react to the gold along with a step2 clean NH4OH:H2O2.

John Atwood
electronics mfgr. - New York, New York, USA
2004

Cyanides and aqua regia (a mixture of hydrochloric and nitric acid) are about the only chemicals that attack gold. Not so if the gold is thin and porous. Then, any chemical that attacks the substrate will pass through the pores and lift the gold layer.

Guillermo Marrufo
Monterrey, NL, Mexico
2004

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