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A New Experimental Setup for in Situ Infrared Reflection Absorption Spectroscopy Studies of Atmospheric Corrosion on Metal Surfaces Considering the Influence of Ultraviolet Light

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Abstract:

The knowledge available regarding the influence of ultraviolet (UV) light on the atmospheric corrosion of materials is very rudimentary. Therefore, a new experimental setup consisting of a cell for studying in situ reactions occurring at the metal/atmosphere interface by simultaneously applying infrared reflection absorption spectroscopy (IRRAS) and quartz crystal microbalance (QCM) measurements was designed and built. The cell presented consists of an acrylic glass body with a UV-light-transparent window mounted in such a way that the sample can be irradiated and weathered under controlled atmospheric conditions under a grazing angle of incidence of the IR beam. This new setup was tested by using a specimen of polycrystalline silver, where the growth of Ag2CO3 and AgOH as basic silver carbonate on the surface could be observed. The weathering tests were carried out in synthetic air containing 90% relative humidity (RH) and 250 ppm CO2, with and without UV light. The results obtained from the IRRAS spectra could be perfectly correlated with the in situ QCM data.

Keywords: ATMOSPHERIC CORROSION; IN SITU MEASUREMENTS; INFRARED REFLECTION ABSORPTION SPECTROSCOPY; IRRAS; QCM; QUARTZ CRYSTAL MICROBALANCE

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/000370209787944271

Affiliations: 1: Institute of Chemical Technologies and Analytics, Institute of Materials Chemistry, Faculty of Technical Chemistry, Vienna University of Technology, Getreidemarkt 9/164, A-1060 Vienna, Austria; Institute of Science and Technology in Art, Academy of Fine Arts, Schillerplatz 3, A-1010 Vienna, Austria 2: Institute of Chemical Technologies and Analytics, Institute of Materials Chemistry, Faculty of Technical Chemistry, Vienna University of Technology, Getreidemarkt 9/164, A-1060 Vienna, Austria

Publication date: April 1, 2009

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