Publication detail

Electrochemical Corrosion Behavior of Pure Mg Processed by Powder Metallurgy

MINDA, J. FINTOVÁ, S. HADZIMA, B. DOLEŽAL, P. HASOŇOVÁ, M. DOSKOČIL, L. WASSERBAUER, J.

Original Title

Electrochemical Corrosion Behavior of Pure Mg Processed by Powder Metallurgy

Type

journal article in Web of Science

Language

English

Original Abstract

Pure Mg samples were prepared by powder metallurgy using the cold and hot compacting methods. Cold compacted pure Mg (500 MPa/RT) was characterized by 5% porosity and the mechanical bonding of powder particles. Hot compacted samples (100 MPa/400 °C and 500 MPa/400 °C) exhibited porosity below 0.5%, and diffusion bonding combined with mechanical bonding played a role in material compaction. The prepared pure Mg samples and wrought pure Mg were subjected to corrosion tests using electrochemical impedance spectroscopy. Similar material corrosion behavior was observed for the samples compacted at 500 MPa/RT and 100 MPa/400 °C; however, hot compacted samples processed at 500 MPa/400 °C exhibited longer corrosion resistance in 0.9% NaCl solution. The difference in corrosion behavior was mainly related to the different binding mechanisms of the powder particles. Cold compacted samples were characterized by a more pronounced corrosion attack and the creation of a porous layer of corrosion products. Hot compacted samples prepared at 500 MPa/400 °C were characterized by uniform corrosion and the absence of a layer of corrosion products on the specimen surface. Powder-based cold compacted samples exhibited lower corrosion resistance compared to the wrought pure Mg, while the corrosion behavior of the hot compacted samples prepared at 500 MPa/400 °C was similar to that of wrought material.

Keywords

magnesium; corrosion; cold pressing; hot pressing; powder metallurgy

Authors

MINDA, J.; FINTOVÁ, S.; HADZIMA, B.; DOLEŽAL, P.; HASOŇOVÁ, M.; DOSKOČIL, L.; WASSERBAUER, J.

Released

19. 8. 2021

Publisher

MDPI

Location

Basel, Switzerland

ISBN

2079-6412

Periodical

Coatings, MDPI

Year of study

11

Number

8

State

Swiss Confederation

Pages from

1

Pages to

15

Pages count

15

URL

https://www.mdpi.com/2079-6412/11/8/986

Full text in the Digital Library

http://hdl.handle.net/11012/201480

BibTex

@article{BUT172316,
  author="Jozef {Minda} and Stanislava {Fintová} and Branislav {Hadzima} and Pavel {Doležal} and Michaela {Hasoňová} and Leoš {Doskočil} and Jaromír {Wasserbauer}",
  title="Electrochemical Corrosion Behavior of Pure Mg Processed by Powder Metallurgy",
  journal="Coatings, MDPI",
  year="2021",
  volume="11",
  number="8",
  pages="1--15",
  doi="10.3390/coatings11080986",
  issn="2079-6412",
  url="https://www.mdpi.com/2079-6412/11/8/986"
}