Paper Title:
The Continuous Plating of Ni-Cr Composite Coatings and TiO2 Nano-Modify
  Abstract

Ni-Cr films were electrodeposited from a nickel sulfate, chromium chloride and chromium sulfate bath. To avoid the poor adhesion and bad surface morphology of the secondary-co-deposition of Ni-Cr alloy films, H2O and DMF (volume ratio as 1:1) is used as solvent. Along with the alloy films growing thick, their surface apertures become larger correspondingly, which causes the hardness and corrosion resistance of the films becoming poor. For comparison, nanocrystalline Ni-Cr films with TiO2 nanoparticles were obtained on the same condition. TiO2 nanoparticles have an average size of 40 nm. The corrosion resistance of the Ni-Cr composite coatings were comparatively evaluated by salt spray test. It is found that the incorporation of TiO2 particles enhances the microhardness and corrosion resistance of the coatings. The reason is that the nano-TiO2 particles in the deposit effectively reduce the size of Ni and Cr crystals through grain refinement-strengthening and dispersion-strengthening effect. The observation results of scanning electron microscopy (SEM) indicated that the Ni-Cr films without dispersions of TiO2 nanoparticles exhibited numerous large and deep crackles, however, the crackles of nano-TiO2 Ni-Cr film distinctly became less.

  Info
Periodical
Advanced Materials Research (Volumes 239-242)
Edited by
Zhong Cao, Xueqiang Cao, Lixian Sun, Yinghe He
Pages
227-231
DOI
10.4028/www.scientific.net/AMR.239-242.227
Citation
D. X. Du, Z. P. Zhang, L. Zhou, "The Continuous Plating of Ni-Cr Composite Coatings and TiO2 Nano-Modify", Advanced Materials Research, Vols. 239-242, pp. 227-231, 2011
Online since
May 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: Yun Lu, Yi Zhu He
Abstract:A Fep/Cu composite coating was developed based on laser cladding process in immiscible liquid system. The microstructure of the coatings is...
1864
Authors: Ri Sheng Du, Ji Hua Peng, Xian Wen Liang, Jun Tian
Abstract:In this paper, the TiN/TiAlN duplex coatings were deposited on SKH51 tool steel by means of multi-arc ion plating. By means of SEM, Vickers...
402
Authors: Lan Yun Qin, Guang Yang, Wei Wang, Ming Tong, Xing Liang Wang
Abstract:TiC reinforced titanium matrix functionally graded materials (FGM) has been produced by processes of laser metal deposition through changing...
316
Authors: Sheng Zhu, Guo Feng Han, Xiao Ming Wang, Wen Bo Du
Chapter 1: Composites
Abstract:In this study, Al-Si alloy protective coating was deposited on the surface of ZM5 magnesium alloy by cold spray technology. Researchers...
142
Authors: Xiao Ming Wang, Sheng Zhu, Qing Chang, Guo Feng Han
Chapter 6: Engineering Materials and Functional Materials
Abstract:In order to protect magnesium alloy structure used in equipments, Al-based alloy coating on ZM5 magnesium alloy surface was prepared by...
756