Publication detail

Improvement of AZ91 Alloy Corrosion Properties by Duplex NI-P Coating Deposition

WASSERBAUER, J. BUCHTÍK, M. TKACZ, J. FINTOVÁ, S. MINDA, J. DOSKOČIL, L.

Original Title

Improvement of AZ91 Alloy Corrosion Properties by Duplex NI-P Coating Deposition

Type

journal article in Web of Science

Language

English

Original Abstract

The corrosion behavior of duplex Ni-P coatings deposited on AZ91 magnesium alloy was studied. The electroless deposition process of duplex Ni-P coating consisted in the preparation of low-phosphorus Ni-P coating (5.7 wt.% of P), which served as a bond coating and high-phosphorus Ni-P coating (11.5 wt.% of P) deposited on it. The duplex Ni-P coatings with the thickness of 25, 50, 75 and 100 µm were deposited on AZ91 magnesium alloy. The electrochemical corrosion behavior of coated AZ91 magnesium alloy was investigated by electrochemical impedance spectroscopy and potentiodynamic polarization method in 0.1 M NaCl. Obtained results showed a significant improvement in the corrosion resistance of coated specimens when compared to uncoated AZ91 magnesium alloy. From the results of the immersion tests in 3.5 wt.% NaCl, 10% solution of HCl and NaOH and 5% neutral salt spray, a noticeable increase in the corrosion resistance with the increasing thickness of the Ni-P coating was observed.

Keywords

Ni-P coating; AZ91 magnesium alloy; electroless deposition; corrosion; electrochemical test

Authors

WASSERBAUER, J.; BUCHTÍK, M.; TKACZ, J.; FINTOVÁ, S.; MINDA, J.; DOSKOČIL, L.

Released

17. 3. 2020

Publisher

MDPI

Location

Basel, Switzerland

ISBN

1996-1944

Periodical

Materials

Year of study

13

Number

6

State

Swiss Confederation

Pages from

1

Pages to

17

Pages count

17

URL

https://www.mdpi.com/1996-1944/13/6/1357/htm

Full text in the Digital Library

http://hdl.handle.net/11012/188109

BibTex

@article{BUT162737,
  author="Jaromír {Wasserbauer} and Martin {Buchtík} and Jakub {Tkacz} and Stanislava {Fintová} and Jozef {Minda} and Leoš {Doskočil}",
  title="Improvement of AZ91 Alloy Corrosion Properties by Duplex NI-P Coating Deposition",
  journal="Materials",
  year="2020",
  volume="13",
  number="6",
  pages="1--17",
  doi="10.3390/ma13061357",
  issn="1996-1944",
  url="https://www.mdpi.com/1996-1944/13/6/1357/htm"
}