Abstract
The corrosion of surfaces inadvertently exposed to the vapors of sulfuric acid due to the presence of lead acid batteries is of concern when banks of batteries and electronic equipment are collocated. It is also of concern when an aqueous solution of is used in a static system to control the relative humidity. We exposed zinc coupons to various concentrations of vapors from both of the above sources at various concentrations. Surface concentrations of elements were evaluated by Auger electron spectroscopy and argon ion sputter depth profiling before, during, and after exposure. Significant sulfur deposition and corrosion only occurs in sealed volumes. This is in agreement with calculations that indicate very small amounts of fresh air flow are sufficient to dilute the battery acid vapors to well below the background level. This work shows that collocation of lead acid batteries and electronic equipment produces no degradation under the normal conditions used in the test.
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