Paper Title:
Effect of Nano-Al2O3 Particles on the NiP/nano-Al2O3 Coatings’ Properties
  Abstract

Composite coatings were prepared using electroless nickel bath containing different concentrations of Al2O3 nano-particles. The analyses of coating compositions, carried out by EDS, showed that there is marginal difference between phosphorus contents of NiP and NiP/nano-Al2O3 deposits. The structure of the coatings was examined by scanning electron microscopy (SEM), and X-ray diffraction (XRD). It has been found that the co-deposition of nano-Al2O3 particles with Ni disturbs the NiP coating’s regular surface structure and increases its surface roughness. DC and AC electrochemical tests were carried out on such coatings in a 3.5wt.% solution of NaCl in order to evaluate their corrosion resistance. The potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) tests both showed that, the corrosion resistance of NiP-Al2O3 coatings firstly increases and then decreases when Al2O3 concentration in electroless bath is increasing, but the corrosion resistance of NiP-Al2O3 composite coating is better than that of amorphous NiP coating.

  Info
Periodical
Edited by
Honghua Tan
Pages
1668-1675
DOI
10.4028/www.scientific.net/AMM.66-68.1668
Citation
X. T. Yuan, Z. Q. Hua, L. Wang, D. B. Sun, S. L. Chen, "Effect of Nano-Al2O3 Particles on the NiP/nano-Al2O3 Coatings’ Properties", Applied Mechanics and Materials, Vols. 66-68, pp. 1668-1675, 2011
Online since
July 2011
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Shahin Khameneh Asl, Mohammad Reza Saghi Beyragh, Mahdi Ghassemi Kakroudi
Abstract:Interest in nanomaterials has increased in recent years. This is due to the potential of size reduction to nanometric scale to provide...
13
Authors: Bing Ying Wang, Zhen Tong Sun
Abstract:Four different metal coatings of pure aluminum, aluminum zinc alloy, titanium, aluminum Titanium were prepared on the surface of X80 pipeline...
533
Authors: Ping Yi Guo, Ning Wang, Peng Fan
Chapter 1: Traditional Building Materials
Abstract:Ceramic oxide coatings were produced on pure titanium by plasma electrolytic oxidation in different electrolytes. The variation of coating...
596
Authors: Yan Bo Wu, Xiao Xi Wang, Ting Lou, Tie Ben Song
Chapter 9: Energy Chemical Engineering
Abstract:SnSO4 and TiOSO4 were chosen in this paper as the main salts for preparing composite chemical conversion coating on aluminum alloy. The scope...
2191
Authors: Shi Gang Xin, Jun Le, Li Xin Song
Abstract:This paper studies the influence of current frequency on the micro-arc oxidation (MAO) process, microstructrue and the properties of the...
76