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conferenceseries.com
March 20-22, 2017 Orlando, USA
3rd International Conference on
Smart Materials & Structures
Volume 6, Issue 2 (Suppl) J Material Sci Eng
ISSN: 2169-0022 JME, an open access journal Smart Materials 2017
March 20-22, 2017
In situ geothermal test results for multilayer coated steel
Ioana Csaki1, Petra Moţoiu2, Aurelian Buzăianu3, Vlad Moţoiu2, Gabriela Popescu1 , Sæmundur Guðlaugsson4, Kolbrun Ragna Ragnasdotti 5, Daniel Guðmundsson6
1Politehnica University Bucharest, Romania
2Tehnoid Com Ltd., Romania
3Metav - R&D, Romania
4Orka Náttúrunnar, Iceland
5Innovation Center Iceland – ICI, Iceland
6Vélvík ehf, Iceland
Geothermal steam contains dissolved minerals that can precipitate from the liquid and deposit onto the surface of the blades and
rotors used for turbine producing geothermal energy. This process is called scaling and it occurs due to a change in temperature,
pressures or pH values of the geothermal fluid disturbing the equilibrium of the system. When scaling occurs in geothermal
equipment can create major problems in geothermal power production. A solution to avoid these problems consists in coating the
steel made turbine blade with different materials layer. These coatings will provide corrosion and erosion resistance and durability
for the equipment used in geothermal energy. Samples coated with Ni base alloy and Y using high velocity oxygen fuel technique
was investigated after in situ testing in Hellisheiði power plant in Iceland. This paper aims to investigate the microstructure, physical
and chemical properties of the coating providing a view on the composite materials behavior under geothermal steam. The studied
composite powders are designed to prevent corrosion damages and have good reliability during the geothermal turbines life. Powder
multi-component and composite layers obtained were investigated using a system characterization by X-ray difractometer and SEM
and EDX analysis to obtain detailed information about the complex modifications inside of the structure and on interface deposition.
Biography
Ioana CSAKI,Associate professor, is working in Engineering and Management of Metallic Materials Production Department, Materials Science and Engineering, University
Politehnica Bucharest, She published a series of 5 books, and over 45 articles and conference papers fromwhich: 16 articles in ISI journals and proceedings and 32 articles
in journals indexed in international data base. She was project partner for 3 international research grants, 1 being the project manager on behalf of UPB and participation
at over 48 research national grants. She is also project manager for EEA grants collaboration between University Polytechnic Bucharest and University of Iceland. The
research directions approached were metallic powders processing for new multi-component materials through powder metallurgy advanced materials, composite mate-
rials, high entropy alloys with very good mechanical properties and multi-component materials for coating parts submitted to high corrosion environment and high wear.
Ioana Csaki et al., J Material Sci Eng 2017, 6:2 (Suppl)