论文信息 - Effect of Surface Substrate Roughness and of Chelating Agent on the Microstructure and Mechanical Properties of Electroless Processed Brass Coatings

Effect of Surface Substrate Roughness and of Chelating Agent on the Microstructure and Mechanical Properties of Electroless Processed Brass Coatings

Brass coatings were deposited by electroless process on zamak-5 alloy substrates with various degrees of polishing and different concentrations of chelating agent in the chemical baths, in which the Cu complexing agent was varied in a wide range of compositions. The effect of Rochelle salt content as well as the substrate roughness on the microstructure and mechanical properties of the prepared coatings was addressed. A two-layer structure is formed during the deposition process having stoichiometric composition corresponding to CuZn and Cu5Zn8 for the top and bottom layer, respectively, and also CuZn5 was detected. The CuZn stoichiometric top layer showed invariably higher hardness. Polishing of the substrate leads to coatings with coarse-grained microstructure and higher surface hardness. It is found that both the chelating agent and the substrate roughness influence the microstructure and mechanical properties of the coatings, and higher chelating agent concentrations and smoother substrates produce hi...

[1] J. González-Hernández,et al. Effect of tartrate salt concentration on the morphological characteristics and composition of Cu-Zn electroless plating on zamak 5 zinc alloy , 2008 .

[2] Ahmed I. Abdelrahman,et al. On the aggregation phenomena of Au nanoparticles: Effect of substrate roughness on the particle size , 2008 .

[3] W. Fulton. Steel Tire Cord-Rubber Adhesion, Including the Contribution of Cobalt , 2005 .

[4] C. Sánchez,et al. Grain and crystallite size in polycrystalline pyrite thin films , 2005 .

[5] K. Mori,et al. Effect of Compound Ingredients on Adhesion between Rubber and Brass-Plated Steel Cord , 2005 .

[6] Toshiaki Shimizu,et al. Examination of Rubber Adhesion Property of Brass Film on Steel Formed by Magnetron Sputtering , 2005 .

[7] C. Koch,et al. Pulse current electrodeposition of nanocrystalline zinc , 2003 .

[8] M. V. Moreno,et al. Process for autocatalytic brass plating on Zamak alloys , 2001 .

[9] A. Evans,et al. Effects of Morphology on the Decohesion of Compressed Thin Films , 1998 .

[10] Alexander M. Korsunsky,et al. On the hardness of coated systems , 1998 .

[11] G. Pharr,et al. An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments , 1992 .