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New Approach Identifying Corrosion Effects besides Standardized Materials Testing
V. Hopp, A. Masoudi, A. Sax, P. Quirmbach
University of Koblenz-Landau, Faculty for Natural Science, Chemistry, Chair for Technical Chemistry and Corrosion Science, Campus Koblenz, Universitätsstr. 1, 56070 Koblenz, Germany
received September 12, 2014, received in revised form October 20, 2014, accepted November 30, 2014
Vol. 6, No. 1, Pages 47-54 DOI: 10.4416/JCST2014-00039
Abstract
The corrosion resistance of waterglass-based putties is influenced considerably by the alkali modulus. The acid resistance of such putties is currently tested according to the standard DIN EN 993 – 16 and described by means of the measured change in weight. Dynamic Mechanical Analysis (DMA), a testing procedure to define the viscoelastic behavior of plastic materials, has brought about new findings on evaluation of the influence of the alkali modulus and the kind of damage resulting from corrosion caused by acids, with regard to mechanical behavior. Both applied test methods have revealed two different effects of corrosion: weight loss on the one hand, and a decrease in the storage modulus EI, on the other hand.
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Keywords
Acid-resistant putties, corrosion, Dynamic Mechanical Analysis
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