Publisher : The Korean Institute of Surface Engineering
DOI : 10.5695/JKISE.2016.49.3.238
Title & Authors
Electrodeposition of Copper on AZ91 Mg Alloy in Cyanide Solution Nguyen, Van Phuong; Park, Min-Sik; Yim, Chang Dong; You, Bong Sun; Moon, Sungmo;
Copper electrodeposition on AZ91 Mg alloy was studied in views of preferential deposition on - or - phases and how to achieve uniform deposition over the entire surface on - and -phases in a cyanide solution. The inhomogeneous microstructure of AZ91 Mg alloy, particularly - and -phases, was found to result in non-uniform deposition of zincate layer, preferential deposition of zincate on -phases, which leads to non-uniform growth of copper layer during the following electrodeposition process. The preferential depositions of zincate can be attributed to higher cathodic polarizations on the -phases. Pin-hole defects in the copper electrodeposit were observed at the center of large size -phase particles which is ascribed to gas bubbles formed at the -phases. The activation of AZ91 Mg alloy in hydrofluoric acid solution was used to obtain uniform growth of zincate layer on both the - and -phases. By choosing an optimum activation time, a uniform zincate layer was obtained on the AZ91 Mg alloy surface and thereby uniform growth of copper was obtained in a cyanide copper electroplating solution.
Mg alloy;Copper electrodeposition;Zincate layer;
Y. Kojima, Project of platform of science and technology for advanced magnesium alloys, Mater. Trans., 42 (2001) 1154-1159.
G. L. Song, Corrosion prevention of magnesium alloys, Woodhead Publishing Limited, (2013).
N. V. Phuong, K. H. Lee, D. Chang, M. Kim, S. Lee, S. Moon, Zinc phosphate conversion coatings on magnesium alloys - a review, Met. Mater. Int., 19 (2013) 273-281.
J. E. Gray, B. Luan, Protective coatings on magnesium and its alloys - a critical review, J. Alloy Compd., 336 (2002) 88-113.
A. Atrens, G. -L. Song, M. Liu, Z. Shi, F. Cao, M.S. Dargusch, Review of recent developments in the field of magnesium corrosion, Adv. Eng. Mater., 17 (2015) 400-453.
B. R. Fazal, S. Moon, Formation of cerium conversion coatings on AZ31 magnesium alloy, J. Kor. Inst. Surf. Eng., 49 (2016) 1-13.
X. B. Chen, H. Y. Yang, T. B. Abbott, M. A. Easton, N. Birbilis, Corrosion-resistance electrochemical platings on magnesium alloys: A stateof- the-art review, Corrosion, 68 (2011) 518-535.
X. P. Lei, G. Yu, Y. P. Zhu, Z. P. Zhang, X. M. He, B. N. Hu, Y. Chen, Successful cyanide free plating protocols on magnesium alloys, T. I. Met. Finish., 88 (2010) 75-80.
F. Czerwinski, Magnesium alloys - Corrosion and surface treatments, InTech, Croatia, (2011) 153-184.
L. P. Wu, J. J. Zhao, Y. P. Xie, Z. D. Yang, Progress of electroplating and electroless plating on magnesium alloy, Trans. Nonferrous Met. Soc. China, 20 (2010) 630-637.
C. A. Huang, T. H. Wang, T. Weirich, V. Neubert, A pretreatment with galvanostatic etching for copper electrodeposition on pure magnesium and magnesium alloys in an alkaline copper-sulfate bath, Electrochim. Acta, 53 (2008) 7235-7241.
P. Zhu, L. Y. Wang, G. R. Qian, T. H. Cao, Copper coating electrodeposited directly onto AZ31 magnesium alloy, Anti-Corros. Method. M., 60 (2013) 127-133.
J. Tang, K. Azumi, Effect of copper pretreatment on the zincate process and subsequent copper electrodeposition of AZ31 magnesium alloy, J. Electrochem. Soc., 158 (2011) D535-D540.
P. Zhu, L. Y. Wang, Y. Chen, M. Zhou, J. Zhou, Electrodeposition of copper coating on AZ31 magnesium alloy, Surf. Eng., 28 (2012) 796-799.
J. C. Ballesteros, E. Chainet, P. Ozil, Y. Meas, G. Trejo, Electrodeposition of copper from noncyanide alkaline solution containing tartrate, Int. J. Electrochem. Sci., 6 (2011) 2632-2651.
J. Tang, K. Azumi, Influence of zincate pretreatment on adhesion strength of a copper electroplating layer on AZ91 D magnesium alloy, Surf. Coat. Tech., 205 (2011) 3050-3057.
C. A. Huang, Y. H. Yeh, C. K. Lin, C. Y. Hsieh, Copper electrodeposition on a magnesium alloy (AZ80) with a U-Shaped surface, Materials, 7 (2014) 7366-7378.
J. Lee, W. Chung, U. Jung, Y. Kim, Direct nickel electrodeposition on magnesium alloy in pyrophosphate electrolyte, Surf. Coat. Tech., 205 (2011) 4018-4023.
Modern electroplating 5th edition, Mordechay Schlesinger (Editor), Milan Paunovic (Editor), A John Wiley & Sons, Inc., Publication (2010) 33-78.
O. Radovici, Cecilia Vass, I. Solacolu, Some aspects of copper electrodeposition from pyrophosphate electrolytes, Electrodepos. Surface Treat., 2 (1974) 263-273.
J. H. Lee, Y. H. Kim, U. C. Jung, W. S. Chung, Electroplating on magnesium alloy in KF-added pyrophosphate copper bath, Kor. J. Met. Mater., 48 (2010) 218-224.
J. Kato, W. Urushihara, T. Nakayama, Magnesium based alloys article and a method thereof, US Patent No: 6,068,938.
ASTM standard D3359-02, ASTM International; 2004, 06.01.
Tohru Watanabe, Nano-plating: Microstructure control theory of plated film and data base of plated film microstructure, Elsevier (2004).