DEPENDENCE OF CORROSION BEHAVIOR OFNi–MoS2/Al2O3COATINGS IN RELATION TO THEAl2O3RATIO INMoS2/Al2O3PARTICLES

Zhong-Jia Huang and Dang-Sheng Xiong ()
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Zhong-Jia Huang: Department of Materials Science and Engineering, Nanjing University of Science and Technology, Jiangsu 210094, P. R. China
Dang-Sheng Xiong: Department of Materials Science and Engineering, Nanjing University of Science and Technology, Jiangsu 210094, P. R. China

Surface Review and Letters (SRL), 2009, vol. 16, issue 03, 455-462

Abstract: TheMoS2particles were coated withAl2O3ratio varying from 5 to 50 wt.% content.Ni–MoS2/Al2O3composite coatings were prepared by means of pulse electrodeposition. The dependence of preferential orientation index and corrosion properties of these composite coatings was investigated in relation to theAl2O3ratio inMoS2/Al2O3particles. Polarization measurements have been used to evaluate corrosion resistance performance of coating. TheNi–MoS2/50wt.%Al2O3coatings showed the highest corrosion resistance compared withNi–MoS2/5wt.%Al2O3,Ni–MoS2/10wt.%Al2O3, andNi–MoS2/30wt.%Al2O3coatings. Thus, it is understood that the increase of ratio ofAl2O3inMoS2/Al2O3composite particle improves the corrosion efficiency of coating. TheseAl2O3act as inert physical barriers to the initiation and development of corrosion defect, hence improve the corrosion resistance of the coating.

Keywords: Composite coating; corrosion protection; orientation index; potentiodynamic polarization; 81.15.p (search for similar items in EconPapers)
Date: 2009
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DOI: 10.1142/S0218625X09012858

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