A Study on the Oxidation Behavior of Nickel Coatings with Different Grain Sizes and Preferred Orientations

Abstract:

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Ni coatings with different grain sizes and preferred orientations were produced by the control of current density during a direct current electrodepositing process. The effects of grain size reduction and preferred orientation on the oxidation behavior in air at 600°C and 960°C of Ni coatings were investigated respectively. An important and interesting result is that after oxidation at 600°C, the Ni coating obtained at lower current density has a better oxidation resistance, whereas after oxidation at 960°C, the Ni coating obtained at higher current density has a more compact scale and a better oxidation resistance. For the Ni coatings oxidation at 600°C, the oxidation behavior was mainly influenced by grain size, whereas in the case of the Ni coatings oxidation at 960°C, the oxidation behavior was only slightly influenced by grain size. The changes in oxidation behavior of Ni coatings at 960°C can be attributed to the different preferred orientation and the corresponding oxidation mechanism.

Info:

Periodical:

Advanced Materials Research (Volumes 183-185)

Edited by:

Yanguo Shi and Jinlong Zuo

Pages:

1762-1766

DOI:

10.4028/www.scientific.net/AMR.183-185.1762

Citation:

L. Ma et al., "A Study on the Oxidation Behavior of Nickel Coatings with Different Grain Sizes and Preferred Orientations", Advanced Materials Research, Vols. 183-185, pp. 1762-1766, 2011

Online since:

January 2011

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Price:

$35.00

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