Corrosion resistance of nanosilicasilicate conversion coatings on aluminum prepared by the dip immersion method

Abstract Nanosilica modified potassium silicate conversion coatings were deposited on the surface of 2024 aluminum alloy by the dip immersion method, and the effect of the immersion time was studied on anticorrosion behavior of coatings. The corrosion behavior of coatings was examined by means of electrochemical impedance spectroscopy, potentiodynamic polarization and surface analyzing techniques. The coated samples showed a significant decrease in corrosion rate. The experimental results indicated that the increase in silica ratio led to an increasing in the corrosion resistance of aluminum. Immersion time in potassium silicate solution showed a significant effect on silicate conversion coating and higher corrosion resistance was obtained with 400 s immersion. This behavior can be related to increasing the silicate coating continuity which formed on the surface. The coating performance evaluated in acidic and basic NaCl solution as well as the results showed the corresponding stability of nanosilica modified silicate conversion coating in these solutions.

[1]  I. Danaee,et al.  Effect of Silica Ratio on the Corrosion Behavior of Nano-silica Potassium Silicate Coatings on Aluminum Alloy 2024 , 2015, Journal of Materials Engineering and Performance.

[2]  I. Danaee,et al.  The effect of curing time and curing temperature on the corrosion behavior of nanosilica modified potassium silicate coatings on AA2024 , 2014 .

[3]  S. Özel.  Microstructure and Mechanical Properties of HVOF Sprayed WC-Co/NiCrBSi, Cr3C2 Coatings on Al Alloys , 2013 .

[4]  X. Montero,et al.  Low-activity aluminide coatings for superalloys using a slurry process free of halide activators and chromates , 2013 .

[5]  M. Golozar,et al.  Effects of Surface Treatment on Corrosion Resistance of 316 Stainless Steel Implants in Tyrode Solution , 2013 .

[6]  M. R. Toroghinejad,et al.  Corrosion investigation of Al–SiC nano-composite fabricated by accumulative roll bonding (ARB) process , 2013 .

[7]  I. Danaee,et al.  The Inhibition Effect of Synthesized 4-Hydroxybenzaldehyde-1,3propandiamine on the Corrosion of Mild Steel in 1 M HCl , 2013, Journal of Materials Engineering and Performance.

[8]  S. Yilmaz.  Microstructural and Mechanical Properties of Pure Aluminum, 5083 and 7075 Alloys Joined by Friction Stir Welding , 2012 .

[9]  Ji Hoon Park,et al.  Synergistic effect of potassium metal siliconate on silicate conversion coating for corrosion protection of galvanized steel , 2012 .

[10]  L. Jiang,et al.  An atomic emission spectroelectrochemical study of passive film formation and dissolution on galvanized steel treated with silicate conversion coatings , 2012 .

[11]  Rukiye Ertan,et al.  Effects of Welding Parameters on the Mechanical Properties of Inert Gas Welded 6063 Aluminum Alloys , 2012 .

[12]  I. Karacan,et al.  Artificial Neural Network (ANN) Approach to Hardness Prediction of Aged Aluminium 2024 and 6063 Alloys , 2012 .

[13]  Ismail Ab Rahman,et al.  Synthesis of silica nanoparticles by sol-gel: size-dependent properties, surface modification, and applications in silica-polymer nanocomposites — a review , 2012 .

[14]  I. Danaee.  Kinetics and mechanism of palladium electrodeposition on graphite electrode by impedance and noise measurements , 2011 .

[15]  I. Danaee,et al.  Kinetics of the hydrogen evolution reaction on NiMn graphite modified electrode , 2011 .

[16]  Chun-shan Che,et al.  Self healing ability of silicate conversion coatings on hot dip galvanized steels , 2011 .

[17]  Chun-shan Che,et al.  Effect of silicate anion distribution in sodium silicate solution on silicate conversion coatings of hot-dip galvanized steels , 2011 .

[18]  H. Durmuş.  Mechanical Properties and Corrosion Behaviour of MIG Welded 5083 Aluminium Alloy , 2011 .

[19]  Y. Erarslan.  Fabrication and Aging Behaviour of In-Situ Aluminum Composites , 2011 .

[20]  Aidy Ali,et al.  Residual Stress Relaxation and Surface Hardness of a 2024-t351 Aluminium Alloy , 2010 .

[21]  S. Özel,et al.  Plasma Spray Coating of an AA 2024-T4 Al Alloy with Oxide Powders , 2010 .

[22]  Jin-tang Lu,et al.  Effect of SiO2:Na2O molar ratio of sodium silicate on the corrosion resistance of silicate conversion coatings , 2010 .

[23]  Ricardo P Nogueira,et al.  Silica-based coating for corrosion protection of electrogalvanized steel , 2005 .

[24]  R. Yoon,et al.  Development of environmentally friendly nonchrome conversion coating for electrogalvanized steel , 2004 .

[25]  M. Hara,et al.  Corrosion protection property of colloidal silicate film on galvanized steel , 2003 .

[26]  K. Aramaki.  Self-healing mechanism of an organosiloxane polymer film containing sodium silicate and cerium(III) nitrate for corrosion of scratched zinc surface in 0.5 M NaCl , 2002 .

[27]  K. Klabunde,et al.  Nanoscale materials in chemistry , 2001 .

[28]  G. Frankel,et al.  Effects of chromate and chromate conversion coatings on corrosion of aluminum alloy 2024-T3 , 2001 .

[29]  L. T. Zhuravlev.  The surface chemistry of amorphous silica. Zhuravlev model , 2000 .

[30]  Gordon P. Bierwagen,et al.  Review of alternatives to chromate for corrosion protection of aluminum aerospace alloys , 1998 .

[31]  S. G. Ampian,et al.  Crystalline Silica Primer , 1998 .

[32]  J. Ross Macdonald,et al.  Note on the parameterization of the constant-phase admittance element , 1984 .

[33]  H. Godard.  Oxide Film Growth over Five Years on Some Aluminum Sheet Alloys in Air of Varying Humidity at Room Temperature , 1967 .