Analysis of cross-sectional layers of corrosion using metallographic microscope
Journal Title: Geology, Geophysics & Environment - Year 2013, Vol 39, Issue 2
Abstract
The aim of this study was to identify and recognize the phenomena of corrosion between glass-metal connections. Experiments were carried out on historical and contemporary samples treated with corrosion catalysts and the results helped to identify the most corrosive conditions for historic objects. Microscopic observations were carried out on cross-sectional layers of specially prepared samples of enamel on copperplate, corresponding to the chemical composition of historic samples-enamel from Limoges. Subsequently, a series of techniques were implemented improving the quality of the image. A 20-micron thick corrosion layer can be observed and recorded using this method. Observations allowed to determine the quality and technology aspects of the enamel exposed to the processes. The diagnosis of corrosion processes is extremely important in order to determine the application technique of enamel on the metal substrate. Microscopic images therefore revealed the formation of corrosion products. This proved an efficient and effective way to provide information on the thickness, color and structure of the observed layers. Micro-photographs from a metallographic microscope allowed for further planning and the subsequent use of a Scanning Electron Microscope (SEM) with an Energy Dispersive Spectrometer (EDS) and Raman Spectrometer (RS) - mitigating the need for the analysis of the entire sample's surface. Most corroded places have been identified and the metal proved to be more reactive material. The impact of factors such as: the technique of layering the enamel, structural inclusions, pitting corrosion, temperature and the environment's impact have been clearly linked to the overlap of the corrosion processes.
Authors and Affiliations
B. Szala, E. Greiner-Wrona, M. Kwaśniak-Kominek
Keywords
Related Articles
- EP ID EP165015
- DOI 10.7494/geol.2013.39.2.125
- Views 117
- Downloads 0
Layering of façades. A few comments on the colour of Krakow's façades in earlier and contemporary times
Witnesses to a bygone age, façades are evidence of past life. Interpretation of traces, and particularly colours, aids to recognize old tastes and moods. This paper reviews ornamentation methods used for the outerwalls o...
A characterisation of the geothermal potential of the Muschelkalk deposits’ location, with the prospective of its utilization in balneology and recreation (southern Poland)
Analysis of the geothermal potential of the Muschelkalk deposits was carried out from the point of view of utilising hot groundwater in balneology and recreation. As a result of a number of analytical studies, the area s...
Titanium compounds and their impact on the transformation of air pollutants
Titanium, as a transition metal, demonstrates a high mechanical strength. It is light and corrosion resistant. The estimation of the environmental impact of the use of machine parts that grains are freed from and contact...
Department of Fossil Fuels
Department of Fossil Fuels
Characterization of perlites from Jastrabá and Lehôtka pod Brehmi deposits
Perlite is an important industrial mineral with unique properties. It is an acid volcanic glass (rhyolitic or rhyodacitic) with a water content between 1 to 5%. The largest industrial use is in the form of expanded pearl...