Speaker
Rudolf Vallant
(Graz University of Technology)
Description
Electrochemical polarisation tests using a three-electrode set up (reference-working-counter electrode) were performed to evaluate the corrosion and the pitting potential as well as the corrosion rate in a 0.5 molar NaCl solution of Selective Laser Melted (SLM) S316L specimens. The evaluation of the corrosion potential (OCP) showing the lowest tendency to corrode for the polished SLM surface. Surprisingly the as-build surface exhibits higher OCP values than the polished sheet metal. The corrosion rate of the SLM as-built and the polished sheet metal, gave comparable results. Here again the polished SLM showed the lowest corrosion rate. Using LOM, Raman and EDS surfacial and microstructural analyses, a link to the observed corrosion behaviour could be found basically. The result of higher interest is the good corrosion behaviour of the as-built surface, whereat no further polishing production step would be neccessary, which means a further economical advantage.
| Speaker Country | Austria |
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Author
Lakshya Bevli
(Graz University of Technology)
Co-authors
Mr
Christian Höller
(Graz University of Technology)
Christof Sommitsch
(Graz University of Technology)
Ricardo Buzolin
(Graz University of Technology)
Dr
Rudolf Vallant
(Graz University of Technology)