ORIENTAL JOURNAL OF CHEMISTRY www.orientjchem.org An International Open Access, Peer Reviewed Research Journal ISSN: 0970-020 X CODEN: OJCHEG 2022, Vol. 38, No.(2): Pg. 388-398 This is an Open Access article licensed under a Creative Commons license: Attribution 4.0 International (CC- BY). Published by Oriental Scientifc Publishing Company © 2018 A Study on the Effect of Lawsone as Complexing Agent in the Electroless Zn-P Deposition H. ASIA THAbASSOOM 1 *, F. FEMINA, J. FELICITA FLORENCE 2 , R. KANMANI and J. AMALA INFANT JOICE * 1,2 PG and Research Department of Chemistry, Holy Cross College (Autonomous), affliated to Bharathidasan University, Tiruchirappalli-620002, India. *Corresponding author E-mail: asia.shahbir@gmail.com http://dx.doi.org/10.13005/ojc/380221 (Received: January 31, 2022; Accepted: April 6, 2022) AbSTRACT The effect of Lawsonia inermis Linn Leaf extract on electroless deposition of Zinc-P alloy on mild steel is studied in alkaline solutions. The effect of experimental processing parameters on the deposition rate is investigated during electroless plating. The bath compositions and operating conditions are optimized. The results obtained show the inclusion rate of electroless Zn-P alloy coating is found to be increased by increasing the volume of additives from 0.5 mL to 1.5 mL. Structured UV-A signifcant spectroscopic absorption rate is taken to ensure the presence of Lawsone in the binary complex in the alkaline bath. In the absence of a complexing agent, additive Lawsone develops more features and levels of arrangement. It offers the idea of changing sodium citrate with Lawsone. The effect of Lawsone as a complex agent on Zn-P electroless coating is tested by SEM, EDAX, AFM, XRD and corrosion studies. The corrosion effciency of electroless Zn-P coating is assessed by polarization and electrochemical impedance spectroscopy. Keywords: Lawsonia inermis Linn leaf, SEM, EDAX, XRD, AFM, Micro hardness, UV-Visible spectrum and polarization studies. INTRODUCTION Electroless plating of metals and process technology have important role along with other methods of plating. Electroless process is not constrained by the shape, size or conductivity of the supporting substance 1-3 . It is a highly effective means of plating metals into nonconductors. Hence electroless plating has elicited much interest among scientifc community in recent years. Today, sophisticated electroless plating systems are in use in many varied electronic applications (PCB industries, IC fabrication, EMI shielding etc) 4 . Electroless plated zinc coatings are considered as one of the many ways of corrosion protection of steel. Zinc has many functions. It is widely used in a variety of covering methods for the protection of various metals, as well as in powder and dust formulations, such as oxide, and for clinical purposes 5 . Zinc is cut into dry batteries and hardens the copper covering the U.S. penny. Zinc alloys are