Detail publikace

Characterization of Prepared Superhydrophobic Surfaces on AZ31 and AZ91 Alloys Etched with ZnCl2 and SnCl2

DOSKOČIL, L. ŠOMANOVÁ, P. MÁSILKO, J. BUCHTÍK, M. HASOŇOVÁ, M. KALINA, L. WASSERBAUER, J.

Originální název

Characterization of Prepared Superhydrophobic Surfaces on AZ31 and AZ91 Alloys Etched with ZnCl2 and SnCl2

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Superhydrophobic surfaces were prepared using a two-step method that involved the etching of AZ31 and AZ91 magnesium alloys and then modifying the etched alloys with stearic acid. Magnesium alloys etched with ZnCl2 and SnCl2 exhibited surfaces roughened with micro- and nanoscale hierarchical structures consisting of two chemically distinct regions (Zn/Zn(OH)2 or Sn/SnO2 and Mg(OH)2). An optimum etching time of ten minutes was chosen for both etchants. Superhydrophobic surfaces with the highest contact angle were prepared when stearic acid reacted with the etched alloys at 50 °C for 4 h. Stearic acid was bound as zinc stearate and magnesium stearate on Mg alloys etched with ZnCl2 and SnCl2 solutions, respectively. The superhydrophobic process on AZ31 alloys etched with ZnCl2 and SnCl2 improved the corrosion resistance in phosphate buffered saline (PBS) solution compared to bare AZ31 alloy, with the use of ZnCl2 etchant leading to better results. An improvement in the corrosion resistance of AZ91 alloy was observed when the stearic-acid-modified AZ91 alloy was etched with SnCl2. In contrast, the use of ZnCl2 etchant to pretreat AZ91 alloy resulted in a significant deterioration in corrosion properties compared to bare AZ91 alloy. The microstructure of the Mg alloy had an impact on the etching and modification process. On the basis of the findings, a characterization of the chemistry of etching magnesium alloys and the formation of superhydrophobic surfaces was proposed. Magnesium alloys were prepared with superhydrophobic surfaces, incorporating antibacterial metals, features which may increase their potential for use in medical applications.

Klíčová slova

AZ31 alloy; AZ91 alloy; chemical etching; corrosion resistance; superhydrophobic surface

Autoři

DOSKOČIL, L.; ŠOMANOVÁ, P.; MÁSILKO, J.; BUCHTÍK, M.; HASOŇOVÁ, M.; KALINA, L.; WASSERBAUER, J.

Vydáno

27. 9. 2022

Nakladatel

MDPI

Místo

Basel, Switzerland

ISSN

2079-6412

Periodikum

Coatings, MDPI

Ročník

12

Číslo

10

Stát

Švýcarská konfederace

Strany od

1414

Strany do

1433

Strany počet

20

URL

https://www.mdpi.com/2079-6412/12/10/1414

BibTex

@article{BUT179340,
  author="Leoš {Doskočil} and Pavlína {Šomanová} and Jiří {Másilko} and Martin {Buchtík} and Michaela {Hasoňová} and Lukáš {Kalina} and Jaromír {Wasserbauer}",
  title="Characterization of Prepared Superhydrophobic Surfaces on AZ31 and AZ91 Alloys Etched with ZnCl2 and SnCl2",
  journal="Coatings, MDPI",
  year="2022",
  volume="12",
  number="10",
  pages="1414--1433",
  doi="10.3390/coatings12101414",
  issn="2079-6412",
  url="https://www.mdpi.com/2079-6412/12/10/1414"
}