Metrics

  • citations in SCIndeks: 0
  • citations in CrossRef:0
  • citations in Google Scholar:[]
  • visits in previous 30 days:8
  • full-text downloads in 30 days:6

Contents

article: 10 from 28  
Back back to result list
2015, vol. 56, iss. 1, pp. 75-80
Impact of roughness of Zn-Mn coatings on corrosive stability
aUniversity of East Sarajevo, Faculty of Technology, Zvornik, Republic of Srpska, B&H
bUniversity of Belgrade, Faculty of Technology and Metallurgy
Abstract
This paper involves electrochemical deposition of Zn-Mn coatings from four solutions. We measured their roughness and corrosion stability. We used cathodes made of steel of unknown composition that were licensed under the chemical preparation before the electrochemical deposition of dual-Zn-Mn coatings, and we also used the anode of zinc, purity of 99.99%. Dual Zn- Mn coatings were electrodeposited for 15 minutes from all of the solutions at a current densities of 1 A/dm2, 2 A/dm2 and 4 A/dm2. All experiments were carried out galvanostatialy (at constant current) in an electrochemical cell, volume of 500 cm3 and at room temperature. The roughness of electrochemically deposited Zn-Mn coatings was measured by a TR200 device and corrosion stability of deposited coatings by determining the Electrochemical Impedance Spectroscopy (EIS). The results show that the coatings with the smallest roughness are coatings deposited at a current density of 2 A/dm2 from all of the solutions. The exception is solution 3 with the relation [Mn2+]:[Zn2+]=1:2 where the roughness is at the lowest level in comparison to all solutions, ranging from 0.71 to 0.875 μm, and the roughness is lowest at the current density of 4 A/dm2 and is 0.71 μm. Based on electrochemical measurements, the corrosive most stable Zn-Mn coating is deposited at a current density of 2 A/dm2 from all the solutions and at the current density of 4 A/dm2 from solution 3 with a ratio of [Mn2+]:[Zn2+]=1:2. This suggests that the corrosion stability is related directly to the roughness and compactness of Zn-Mn coatings. When it comes to corrosion, the most stable coatings are those with the lowest roughness.
References
Bajat, J.B., Petrović, A.B., Maksimović, M.D. (2005) Electrochemical deposition and characterization of zinc-nickel alloys deposited by direct and reverse current. Journal of the Serbian Chemical Society, vol. 70, br. 12, str. 1427-1439
Bajat, J.B., Maksimović, M.D., Tomić, M.V., Pavlović, M.G. (2012) The study of Zn-Co alloy coatings electrochemically deposited by pulse current. Hemijska industrija, vol. 66, br. 5, str. 749-757
Baudrand, D.W. (2001) Aircraft Applications for Electroless Nickel Plate. Metal Fin., 33
Bhat, R.S., Bhat, ' U.K.A., Hegde, C. (2011) Corrosion Behavior of Electrodeposited Zn-Ni, Zn-Co and Zn-Ni-Co Alloys. Anal. Bioanal. Electrochem, Vol. 3, No. 3, 302-315
Bozzini, B., Griskonis, E., Fanigliulo, A., Sulcius, A. (2002) Electrodeposition of Zn-Mn alloys in the presence of thiocarbamide. Surface and Coatings Technology, 154(2-3): 294-303
Bučko, M.M., Stevanović, S.I., Tomić, M.V., Pavlović, M.G., Bajat, J.B. (2011) The peculiarities of electrochemical deposition and morphology of Zn-Mn alloy coatings obtained from pyrophosphate electrolyte. Hemijska industrija, vol. 65, br. 3, str. 295-303
Đorđević, S., Maksimović, M.D., Pavlović, M.G., Popov, K.I. (1998) Galvanotehnika. Beograd: Tehnička knjiga
Eyraud, M., Garnier, A., Mazeron, F., Crousier, J. (1995) Morphology and composition of electrodeposited zinc-manganese alloys. Plat. Surf. Finish, 82, str. 63-70
Guidelli, R., Schmickler, W. (2000) Recent developments in models for the interface between a metal and an aqueous solution. Electrochimica Acta, 45(15-16): 2317-2338
Kautek, W., Sahre, M., Paatsch, W. (1994) Transition metal effects in the corrosion protection of electroplated zinc alloy coatings. Electrochimica Acta, 39, 1151
Mladenović, S. (1990) Korozija materijala. Beograd: Tehnološko-metalurški fakultet / TMF
Ortiz, Z.I., Díaz-Arista, P., Meas, Y., Ortega-Borges, R., Trejo, G. (2009) Characterization of the corrosion products of electrodeposited Zn, Zn-Co and Zn-Mn alloys coatings. Corrosion Science, 51(11): 2703-2715
Pavlović, M., Stanojević, D., Mladenović, S. (2012) Korozija i zaštita materijala. TF Zvornik
Pech-Canul, M.A., Ramanauskas, R., Maldonado, L. (1997) An electrochemical investigation of passive layers formed on electrodeposited Zn and Zn-alloy coatings in alkaline solutions. Electrochimica Acta, 42, 255
Petrović, M.M. (2011) Univerzitet u Beogradu, Master rad
Pushpavanam, M., Natarajan, S.R., Balakrishnan, K., Sharma, L.R. (1991) Corrosion behaviour of electrodeposited zinc-nickel alloys. J Appl. Electrochem, 21, 642
Tomić, M.V., Bučko, M.M., Mišković-Stanković, V.B., Pavlović, M.G., Bajat, J.B. (2013) Epoxy cataphoretic coatings on steel modified by Zn-Mn alloys. Banja Luka: Contemporary materials, ANURS. Book of Abstracts. 93
Wilcox, G.D., Gabe, D.R. (1993) Electrodeposited zinc alloy coatings. Corrosion Science, 35(5-8): 1251-1258
 

About

article language: Serbian
document type: Original Scientific Paper
DOI: 10.5937/ZasMat1501075T
published in SCIndeks: 29/10/2015