Characterization of Cr-α-Al2O3 Composite Coatings Electrodeposited from Cr(III) Plating Bath

被引：0

作者：

Sun, Xin ^{[1
]}

He, Xiangzhu ^{[1
]}

Wang, Yongxiu ^{[1
]}

Fu, Zhihong ^{[1
]}

机构：

[1] Guangdong Univ Technol, Fac Chem Engn & Light Ind, Guangzhou 510006, Guangdong, Peoples R China

来源：

FRONTIERS OF MANUFACTURING AND DESIGN SCIENCE II, PTS 1-6 | 2012年 / 121-126卷

关键词：

Cr-alpha-Al2O3; composite coating; trivalent chromium; corrosion resistance; CHROMIUM DEPOSITS; BEHAVIOR; RESISTANCE; CORROSION; ALLOYS;

D O I：

10.4028/www.scientific.net/AMM.121-126.60

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Cr-alpha-Al2O3 composite coatings were prepared by direct current deposition experiments from Cr(III) plating bath and the thickness of composite coatings could be up to 14 mu m. The obtained Cr-alpha-Al2O3 coatings and Cr coatings were characterized by means of EDS, SEM and microhardness measurement. Results revealed that Cr-alpha-Al2O3 coatings exhibit fine-grained structure with uniform surface and the highest microhardness values(692 HV) when the alpha-Al2O3 content of coatings was 15g/L, although some pores and defects are still present in the coatings. Analysis of Tafel curves indicated that the presence of alpha-Al2O3 in the Cr coatings show better features in the corrosion resistance both in H2SO4 and NaOH solution than those prepared from the bath without alpha-Al2O3.

引用

页码：60 / 64

页数：5

共 16 条

[1]

Edigaryan A.A., 2004, RUSS J ELECTROCHEM+, V40, P1481

[2]

Fink C.G., 1928, J ELECTROCHEM SOC, V54, P315

[3] Characterization of as-deposited and annealed Cr-C alloy coatings produced from a trivalent chromium bath [J].

Ghaziof, S. ;

Golozar, M. A. ;

Raeissi, K. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2010, 496 (1-2) :164-168

[4] Effect of Ni2+ on Chromium Electrodeposition in Cr(III) Plating Bath [J].

He, Xiangzhu ;

Zhou, Xinli ;

Zhang, Xiaowei .

ADVANCES IN COMPOSITES, PTS 1 AND 2, 2011, 150-151 :1555-1559

[5] The wear behaviour of electro-codeposited Ni-SiC composites [J].

Hou, KH ;

Ger, MD ;

Wang, LM ;

Ke, ST .

WEAR, 2002, 253 (9-10) :994-1003

[6] Corrosion resistance of Pb-Sn composite coatings reinforced by carbon nanotubes [J].

Hu, Zhengxi ;

Jie, Xiaohua ;

Lu, Guohui .

JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, 2010, 7 (06) :809-814

[7] The electrochemical behaviour of the bright chromium deposits plated with direct- and pulse-current in 1 M H2SO4 [J].

Huang, CA ;

Lin, W ;

Liao, MJ .

CORROSION SCIENCE, 2006, 48 (02) :460-471

[8] Corrosion and wear resistance of thick chromium deposits from accelerated Cr(III) electrolytes [J].

Ibrahim, SK ;

Gawne, DT ;

Watson, A .

TRANSACTIONS OF THE INSTITUTE OF METAL FINISHING, 1998, 76 :156-161

[9] Fundamental aspects of bulk metallic glass formation in multicomponent alloys [J].

Johnson, WL .

METASTABLE, MECHANICALLY ALLOYED AND NANOCRYSTALLINE MATERIALS, PTS 1 AND 2, 1996, 225 :35-49

[10]

Kuhn U., 2002, APPL PHYS LETT, V80, P2874

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