Next Article in Journal
Initial β Grain Size Effect on High-Temperature Flow Behavior of Tb8 Titanium Alloys in Single β Phase Field
Previous Article in Journal
Analytical Modeling of the Mixed-Mode Growth and Dissolution of Precipitates in a Finite System
Open AccessArticle

Influence of Nickel Powders on Corrosion Resistance of Cold Sprayed Coatings on Al7075 Substrate

1
Institute of Chemistry, Jan Kochanowski University in Kielce, Swietokrzyska 15G, PL-25406 Kielce, Poland
2
Laser Processing Research Centre, University of Technology, 1000-lecia Panstwa Polskiego 7, PL-25314 Kielce, Poland
3
Institute of Metallurgy and Materials Science, Polish Academy of Sciences, Reymonta 25, PL-30059 Krakow, Poland
*
Author to whom correspondence should be addressed.
Metals 2019, 9(8), 890; https://doi.org/10.3390/met9080890
Received: 29 June 2019 / Revised: 7 August 2019 / Accepted: 10 August 2019 / Published: 15 August 2019
  |  
PDF [4797 KB, uploaded 15 August 2019]
  |     |  

Abstract

The influence of the size and structure of nickel powder grains on the corrosion resistance of nickel coatings on an Al7075 substrate in an acidic chloride solution was investigated. The Ni coating was produced by the cold spraying (CS) method. The surface and microstructure of specimens were observed by a scanning electron microscope (SEM). The corrosion test of the materials was carried out by using the electrochemical method. It has been found that the size of Ni powders has a significant effect on the corrosion resistance of nickel coatings. The porosity of nickel coatings on the Al7075 alloy increases with the increasing size of nickel powders. The corrosion rate of nickel coatings in the chloride environment decreases as the diameter of the nickel powders decreases. On the other hand, the highest corrosion resistance of nickel coatings was obtained using the Ni powders of the irregular spherical or dendritic structure. Moreover, the large particles of nickel powder cause strong residual stress (compared to small grains) in the depth of the nickel coatings. View Full-Text
Keywords: nickel powder; cold spray; nickel coating; corrosion test; acidic chloride solution; residual stress nickel powder; cold spray; nickel coating; corrosion test; acidic chloride solution; residual stress
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Scendo, M.; Zorawski, W.; Goral, A. Influence of Nickel Powders on Corrosion Resistance of Cold Sprayed Coatings on Al7075 Substrate. Metals 2019, 9, 890.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Metals EISSN 2075-4701 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top