Evaluation of Solution Temperature and Treatment Time Effects of Zinc Phosphating on AISI 5140 Alloy Steel

Husein Meshreghi¹ , Fawzi Adawi²

Section:Research Paper, Product Type: Journal-Paper
Vol.7 , Issue.3 , pp.10-15, Sep-2020

Online published on Sep 30, 2020

Copyright © Husein Meshreghi, Fawzi Adawi . This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
 

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Abstract :
Chemicals coatings are protective surface coatings applied to metals under controlling condition. Phosphating is one of the most widely used metal pretreatment process. Due to its economy, corrosion resistance, wear resistance, adhesion and lubricative properties. The treatment of steel with a dilute solution of phosphoric acid and other chemicals in which the surface of the alloy steel, reacting chemically with the phosphoric acid, is converted to an integral, mildly protective layer of insoluble crystalline phosphate. To achieve better understanding of the coating formation on the alloy steel AISI 5140, zinc phosphate coating process was carried out in lab scale for different phosphating times and treatment temperatures. The influences of immersion time and solution temperature on the surface appearance, coating thickness, coating hardness and roughness were investigated. The results of appearance show defects on the surfaces in conditions of 60, 70ºC and phosphate time 1, 2 and 3 min, while good appearance was noted in conditions of 90ºC and phosphate time 3 & 4 min. coating weight, coating thickness and coating hardness were increased with an increase of phosphate time and temperature.

Key-Words / Index Term :
coatings, corrosion, phosphating, surfaces

References :
[1] P. A. Dearnley, Introduction to Surface Engineering (Introduction to Surface Engineering). Cambridge: Cambridge University Press, 2017.
[2] D. B. Freeman, Phosphating and metal pre-treatment: a guide to modern processes and practice. Industrial Press, 1986.
[3] D. W. B. a. A. S. Wagh, "Corrosion protection US patent No. 867841 2003. Brown et al.
[4] S. N. Tsn, "Surface Pretreatment by Phosphate Conversion Coatings - a Review," Reviews on Advanced Materials Science, vol. 9, pp. 130-177, 2005.
[5] Chemical conversion coatings and pretreatments for ferrous surfaces 2004.
[6] Phosphate Coatings, Heavy, Manganese or Zinc Base (for Ferrous Metal),US Military Specs, 2006.
[7] M. Mirmehdi, Handbook of Texture Analysis. Imperial College Press, 2008.
[8] S. Ebnesajjad and A. H. Landrock, " Material Surface Preparation Techniques," in Adhesives Technology Handbook (Third Edition), S. Ebnesajjad and A. H. Landrock, Eds. Boston: William Andrew Publishing, 2015, pp. 35-66.
[9] V. Asadi, I. Danaee, and H. Eskandari, "The Effect of Immersion Time and Immersion Temperature on the Corrosion Behavior of Zinc Phosphate Conversion Coatings on Carbon Steel," Materials Research, vol. 18, pp. 706-713, 2015.
[10] H. E. M. A. A. Sarabi, "The effect of solution temperature and pH on corrosion performance and morphology of nanoceramic?based conversion thin film," Materials and corrosion vol. 64, no. 6, pp. 535-543, 2012.
[11] S. Jegannathan, T. S. N. Sankara Narayanan, K. Ravichandran, and S. Rajeswari, "Formation of zinc–zinc phosphate composite coatings by cathodic electrochemical treatment," Surface and Coatings Technology, vol. 200, no. 12, pp. 4117-4126, 2006.
[12] J. B. Popi? JP, Bajat JB, Veljovi? ?, Stevanovi? SI and Miškovi?-Stankovi? VB, "The effect of deposition temperature on the surface coverage and morphology of iron-phosphate coatings on low carbon steel," Applied Surface Science, pp. 10855-10862, 2011.
[13] S. Wirasate and F. J. Boerio, "Effect of Adhesion, Film Thickness, and Substrate Hardness on the Scratch Behavior of Poly(carbonate) Films," The Journal of Adhesion, vol. 81, no. 5, pp. 509-528, 2005/05/01 2005.
[14] C. Kavitha, K. Ravichandran, and T. S. N. Sankara Narayanan, "Effect of surface mechanical attrition treatment (SMAT) on zinc phosphating of steel," Transactions of the IMF, vol. 92, no. 3, pp. 161-168, 2014.