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Statements

Subject Item
n2:RIV%2F00216208%3A11320%2F13%3A10193143%21RIV14-GA0-11320___
rdf:type
skos:Concept n18:Vysledek
rdfs:seeAlso
http://dx.doi.org/10.1007/s10853-013-7173-4
dcterms:description
The electrochemical properties of AZ31 magnesium alloy processed by extrusion and equal channel angular pressing (ECAP) were investigated. The electrochemical properties were evaluated using potentiodynamic tests and electrochemical impedance spectroscopy in corrosion solution of 0.1 M sodium chloride. The electrochemical changes of the sample surface were correlated with microstructure evolution. Material processed by extrusion and subsequently by 8 passes of ECAP shows similar or even inferior corrosion resistance to the extruded material after immersion time up to 96 h. However, corrosion resistance of material after extrusion and ECAP is significantly better than that of the extruded material for immersion time of 168 h. This sudden improvement is caused by different formation and fall off of protective corrosion products. Microstructure after extrusion is inhomogeneous and contains relatively large grains, whereas material after ECAP possesses homogeneous ultrafine-grained (UFG) microstructure. As a result, material after ECAP offers more corrosion nucleation sites, but UFG microstructure causes that only smaller clusters of corrosion products fall off the surface. The easier and faster corrosion protective layer restoration on the surface of UFG material after ECAP leads to enhanced corrosion resistance. The electrochemical properties of AZ31 magnesium alloy processed by extrusion and equal channel angular pressing (ECAP) were investigated. The electrochemical properties were evaluated using potentiodynamic tests and electrochemical impedance spectroscopy in corrosion solution of 0.1 M sodium chloride. The electrochemical changes of the sample surface were correlated with microstructure evolution. Material processed by extrusion and subsequently by 8 passes of ECAP shows similar or even inferior corrosion resistance to the extruded material after immersion time up to 96 h. However, corrosion resistance of material after extrusion and ECAP is significantly better than that of the extruded material for immersion time of 168 h. This sudden improvement is caused by different formation and fall off of protective corrosion products. Microstructure after extrusion is inhomogeneous and contains relatively large grains, whereas material after ECAP possesses homogeneous ultrafine-grained (UFG) microstructure. As a result, material after ECAP offers more corrosion nucleation sites, but UFG microstructure causes that only smaller clusters of corrosion products fall off the surface. The easier and faster corrosion protective layer restoration on the surface of UFG material after ECAP leads to enhanced corrosion resistance.
dcterms:title
Room temperature corrosion properties of AZ31 magnesium alloy processed by extrusion and equal channel angular pressing Room temperature corrosion properties of AZ31 magnesium alloy processed by extrusion and equal channel angular pressing
skos:prefLabel
Room temperature corrosion properties of AZ31 magnesium alloy processed by extrusion and equal channel angular pressing Room temperature corrosion properties of AZ31 magnesium alloy processed by extrusion and equal channel angular pressing
skos:notation
RIV/00216208:11320/13:10193143!RIV14-GA0-11320___
n18:predkladatel
n19:orjk%3A11320
n3:aktivita
n11:S n11:P
n3:aktivity
P(GA106/09/0482), P(GA13-13616S), S
n3:cisloPeriodika
13
n3:dodaniDat
n14:2014
n3:domaciTvurceVysledku
n9:9739920 n9:5345553
n3:druhVysledku
n13:J
n3:duvernostUdaju
n8:S
n3:entitaPredkladatele
n12:predkladatel
n3:idSjednocenehoVysledku
103462
n3:idVysledku
RIV/00216208:11320/13:10193143
n3:jazykVysledku
n20:eng
n3:klicovaSlova
steel; ecap; behavior; resistance; microstructure; pure magnesium; sodium-sulfate solutions; severe plastic-deformation
n3:klicoveSlovo
n4:pure%20magnesium n4:behavior n4:microstructure n4:severe%20plastic-deformation n4:steel n4:resistance n4:ecap n4:sodium-sulfate%20solutions
n3:kodStatuVydavatele
US - Spojené státy americké
n3:kontrolniKodProRIV
[8C4A66EC60F1]
n3:nazevZdroje
Journal of Materials Science
n3:obor
n16:BM
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
4
n3:projekt
n5:GA106%2F09%2F0482 n5:GA13-13616S
n3:rokUplatneniVysledku
n14:2013
n3:svazekPeriodika
48
n3:tvurceVysledku
Hadzima, B. Janeček, Miloš Bukovina, M. Vrátná, Jitka
n3:wos
000317367200008
s:issn
0022-2461
s:numberOfPages
7
n21:doi
10.1007/s10853-013-7173-4
n10:organizacniJednotka
11320