Abstract
Abstract The reliability of electronic/electrical devices may be greatly affected by the presence of certain airborne gaseous contaminants. Copper and silver coupons in environmentally controlled chambers were exposed to four gases: hydrogen sulfide (H2S), sulfur dioxide (SO2), chlorine (Cl2, and nitrogen dioxide (NO2. The coupons were exposed to the four single gases and combinations thereof, and corrosion levels were subsequently determined by cathodic/electrolytic reduction. On the copper coupons, H2S produced the dominant corrosive effects. For the silver coupons, the combination H2S + NO2 showed a very powerful synergy that produced up to five times the expected corrosion.
Published Version
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