Publication detail

Influence of aluminium content on corrosion behavior of AZ type magnesium alloy

HORYNOVÁ, M. DOLEŽAL, P. ZAPLETAL, J. GEJDOŠ, P. PODRÁBSKÝ, T.

Czech title

Vliv obsahu hliníku na korozní chování hořčíkových slitin typu AZ

English title

Influence of aluminium content on corrosion behavior of AZ type magnesium alloy

Type

conference paper

Language

en

Original abstract

Influence of aluminium content on corrosion behavior of AZ type magnesium alloys was evaluated. Set of samples of magnesium alloys AZ31 (3% Al) and two sets of AZ61 (6% Al) had been exposed to spray of 5% solution of sodium chloride for up to 42 days. In order to observe influence of intermetallic phase on the mechanism of corrosion, one set of AZ61 alloy samples was heat treated prior to corrosion exposure. Optimal conditions for complete dissolution of intermetallic phase were chosen based on heat treatment optimization. Interface between intermetallic phase and solid solution or secondary Al-Mn particles and solid solution served as initiation point for galvanic corrosion. In contrary, comparison of corrosion rate and corrosion mechanism of AZ61 alloy in initial state and after heat treatment showed, that presence of intermetallic phase and Al rich solid solution can act as barrier and slow down corrosion process.

Czech abstract

Byl hodnocen vliv obsahu hliníku na korozní chování hořčíkových slitin typu AZ. Sada vzorků ze slitiny AZ31(3% Al) a AZ61(6% Al) byla podorbena expozicic v korozní komoře s mlhou 5% NaCl po dobu až 42 dnů. Pro zhodnocení vlivu intermetalika na korozní chování slitin bylo před korozní expozicí u jedné sady vzorků ze slitiny AZ61 provedeno rozpouštěcí žíhání.

English abstract

Influence of aluminium content on corrosion behavior of AZ type magnesium alloys was evaluated. Set of samples of magnesium alloys AZ31 (3% Al) and two sets of AZ61 (6% Al) had been exposed to spray of 5% solution of sodium chloride for up to 42 days. In order to observe influence of intermetallic phase on the mechanism of corrosion, one set of AZ61 alloy samples was heat treated prior to corrosion exposure. Optimal conditions for complete dissolution of intermetallic phase were chosen based on heat treatment optimization. Interface between intermetallic phase and solid solution or secondary Al-Mn particles and solid solution served as initiation point for galvanic corrosion. In contrary, comparison of corrosion rate and corrosion mechanism of AZ61 alloy in initial state and after heat treatment showed, that presence of intermetallic phase and Al rich solid solution can act as barrier and slow down corrosion process.

Keywords in English

Magnesium alloys, microstructure, corrosion, heat treatment

RIV year

2015

Released

28.05.2015

ISBN

978-80-214-5146-9

Book

MULTI-SCALE DESIGN OF ADVANCEDMATERIALS-CONFERENCE PROCEEDINGS

Pages from–to

42–47

Pages count

6

BIBTEX


@inproceedings{BUT115071,
  author="Miroslava {Horynová} and Pavel {Doležal} and Josef {Zapletal} and Pavel {Gejdoš} and Tomáš {Podrábský},
  title="Influence of aluminium content on corrosion behavior of AZ type magnesium alloy",
  booktitle="MULTI-SCALE DESIGN OF ADVANCEDMATERIALS-CONFERENCE PROCEEDINGS",
  year="2015",
  month="May",
  pages="42--47",
  isbn="978-80-214-5146-9"
}