Surface treatment on magnesium alloys

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Surface treatment on magnesium alloys

Popis výsledku v původním jazyce

Magnesium alloys are very prospective materials. They have very good mechanical properties and very low density. They are used in automotive industry, aerospace etc. On the other hand magnesium alloys have very low corrosion resistence. And this is the reason, why the protection of magnesium alloys against the corrosion is in focus. One of the most important protective methods are conversion coatings. Magnesium alloys AZ91, AZ61 and AZ31 were treated by phosphate-permanganate and chromate conversion coatings. Chromate coatings are very efficient conversion coatings but they cannot be used any more due to carcinogenic Cr(VI). In our case chromate conversion coating was however taken as standard. Aluminium in magnesium forms intermetallic phase beta (Mg17Al12). Magnesium alloy AZ91 contains more aluminium than AZ31 and AZ61, so the portion of intermetallic phase beta is bigger in magnesium alloy AZ91. Beta-phase has higher electrochemical potential, so in magnesium alloys it behaves like

Název v anglickém jazyce

Surface treatment on magnesium alloys

Popis výsledku anglicky

Magnesium alloys are very prospective materials. They have very good mechanical properties and very low density. They are used in automotive industry, aerospace etc. On the other hand magnesium alloys have very low corrosion resistence. And this is the reason, why the protection of magnesium alloys against the corrosion is in focus. One of the most important protective methods are conversion coatings. Magnesium alloys AZ91, AZ61 and AZ31 were treated by phosphate-permanganate and chromate conversion coatings. Chromate coatings are very efficient conversion coatings but they cannot be used any more due to carcinogenic Cr(VI). In our case chromate conversion coating was however taken as standard. Aluminium in magnesium forms intermetallic phase beta (Mg17Al12). Magnesium alloy AZ91 contains more aluminium than AZ31 and AZ61, so the portion of intermetallic phase beta is bigger in magnesium alloy AZ91. Beta-phase has higher electrochemical potential, so in magnesium alloys it behaves like

Druh

D - Stať ve sborníku

CEP obor

JK - Koroze a povrchové úpravy materiálu

OECD FORD obor

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Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Studentská konference Chemie je život

ISBN

978-80-214-4644-1

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

460-465

Název nakladatele

Vysoké Učení Technické v Brně, Fakulta Chemická, Purkyňova 464/118, 612 00 Brno

Místo vydání

Neuveden

Místo konání akce

Brno

Datum konání akce

7. 12. 2012

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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