Rapid Determination of Corrosion Chamber Uniformity

Abstract

Intra-and interlaboratory comparison of the results obtained with flowing mixed gas accelerated atmospheric corr0~ sion chambers (FMG-AACC) suggests nonuniform conditions for corrosion studies. In this paper we present the use of strategically positioned quartz crystal microbalances (QCM) to rapidly determine, in situ, spatial uniformity in a FMG~ AACC. It is further demonstrated that localized chamber overloading, undetected by measurement of exhaust pollutant gas concentrations, can be monitored with the aid of a QCM. Corrosion film thicknesses are confirmed by Auger electron spectroscopy and sputter ion depth profiling. ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 130.179.16.201 Downloaded on 2015-06-23 to IP