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  English.dicp.cas.cn    Posted:2017-07-28
Lecture: Mössbauer spectroscopy in corrosion science: the selected examples

Time: July 28, 2017, 9:30-10:30 am
Venue: No.1 Conference Room, Energy Buildings Convention Center
Lecturer: Prof. Svetozar Musić, Ruđer Bošković Institute, Zagreb, Croatia 


Corrosion is naturally occurring phenomenon commonly defined as the deterioration of a material (usually a metal) or its properties because of a reaction with its environment. Corrosion may cause dangerous and expensive damage to everything from automobiles, home appliances, drinking water systems, pipelines, bridges, energetic systems, ships buildings etc. Electrochemical corrosion is the most common type of corrosion which takes place at (or) near room temperature as a result of the reaction of iron (steel) with atmospheric H2O or in aqueous solutions of various ionic composition. Transmission and emission Mössbauer spectroscopy as well as CEMS are powerful techniques in the investigation of different types of corrosion processes. In this presentation several applications of Mössbauer spectroscopy in corrosion science will be shown. For example, the formation of iron oxides by surface oxidation of -iron plate at high temperatures will be shown. Mössbauer spectroscopy can be utilized in the monitoring of phase changes in the rust formed by atmospheric corrosion. The phase changes depend mainly on the wet/dry cycles and the presence of gas pollutants in atmosphere, for example SO2 and NOx. The improved corrosion resistance of steel in waters after abrasive blasting with alumina and crevice corrosion product were also investigated by transmission Mössbauer spectroscopy. Application of emission Mössbauer spectroscopy in the investigation of the corrosion inhibition and the nature of the interface between the metal surface and protective organic coating will be shown. Here, it can be mentioned that in some cases a complementary techniques, such as XRD, infrared and Raman as well as electron microscopy with element analysis are needed to obtain a complete picture about the corrosion processes. 

Contact: GE RILE, DNL2005




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