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Chemistry Education 2018 Journal of Organic & Inorganic Chemistry
ISSN: 2472-1123 Page 60
August 27-28, 2018
Zurich, Switzerland
8th Edition of International Conference on
Chemistry Education
and Research
Electropolishing of metals and alloys has been developed for
many decades now, with its ascents in recently patented
magnetoelectropolishing (MEP) process.Most of electropolishing
processes proved its usability for a variety of metallic materials,
beginning specifically from austenitic stainless steels, through
titanium, nickel, cobalt, copper, and their alloys, including many
other metals, such as aluminum and its alloys, intermetallic
compounds (nitinol), as well as niobium and tantalum. During
MEP the stirring is self-imposed by Lorentz force as a result
of interaction of electric and magnetic fields. The influence of
magnetic field on electrochemical process in MEP can be divided
into three main categories: (1) the effect of magnetic field on the
mass transfer, (2) effect on kinetics of the electrode reaction, and
(3) effects relating to morphology and chemistry of the surface
after electrodissolution. The additional external magnetic field
applied in the MEP process results in effective modifying the
metal surface properties of treated parts in comparison with the
properties obtained after a standard electropolishing (EP). During
MEP, beneficial modification of oxide layer of treated metals and
alloys is obtained. After MEP the protective oxide formed on the
surface differs significantly in morphology, homogeneousness,
thickness, kind and quantity of foreign species incorporated in it.
Concerningthelastmatter–wefoundthenon-standardconditions
of high-voltage electropolishing (HVEP) process (up to 450 V)
result in incorporation of some interesting elements from the
electrolyte into the surface film. Our studies revealed the copper
enrichment of stainless steel, with simultaneous reduction of
chromium in the surface layer. Under magnetoelectropolishing of
metallic biomaterials, the corrosion resistance, biocompatibility,
osseointegration, endothelialization, cleanability, anti-galling and
anti-seizing properties are achieved. Some other advantages of
MEP are de-hydrogenation of surface layer and a high increase in
fatigue resistance, the effects especially valuable in the parts of
small diameters or cross-sections.
Magnetoelectropolishing and high-voltage electropolishing of
metals and alloys
Tadeusz Hryniewicz
Koszalin University of Technology, Poland
J Org Inorg Chem 2018, Volume 4
DOI: 10.21767/2472-1123-C5-015