ISSN(Online): 2319-8753 ISSN (Print): 2347-6710 International Journal of Innovative Research in Science, Engineering and Technology (An ISO 3297: 2007 Certified Organization) Website: www.ijirset.com Vol. 6, Issue 6, June 2017 Copyright to IJIRSET DOI:10.15680/IJIRSET.2017.0606115 10750 Surface Characterization Studies of 2-Amino 4, 6-Dimethyl Pyrimidine (ADMP) in Neutral Chloride Medium Nirmala Baby 1 , P. Manjula 2 , K.N. Manonmani 3 , K.S. Sasirekha 4 Assistant Professor, Department of Chemistry, Christian College of Engineering and Technology, Oddanchatram, India 1 Associate Professor and Head, Department of Chemistry, Arulmigu Palaniandavar Arts College for Women (Autonomous), Palani, India 2 Associate Professor, Department of Chemistry, Sri Subramanya College of Engineering and Technology, Palani, India 3 M.Phil Scholar, Department of Chemistry, Gandhigram Rural University, Dindigul, India 4 ABSTRACT: The inhibition efficiency of 2-amino-4, 6-dimethyl pyrimidine (ADMP) on mild steel in aqueous solution containing 60 ppm Cl - ions, and its amalgamation with Zn 2+ ion as synergist are studied by surface morphological analysis like FT-IR, UV, SEM and AFM. FT-IR is efficiently employed to determine the functional groups in the molecular configuration of the inhibitor and in the complex with additional inhibitors. UV-Visible spectroscopy shows the development of (Fe 2+ - ADMP) complex on the surface of the metal. This may be accountable for the surveyed variation in the absorbance, its intensity value and anticorrosion action. It is also prominent that there is a momentous variation in the shape of the spectra before and after the immersion of specimen showing the option of forming thin inhibitor layer over the mild steel surface indicating the adsorption as physical adsorption. SEM analysis illustrates the addition of 150 ppm of ADMP and 80ppm of Zn 2+ to the metal surface curbed the corrosion and the surface damage has lessened significantly. This is due to the formation of skinny layer of inhibitor on the metal surface which controls the dissolution of mild steel. AFM studies presents straight insight into the variations in surface morphology that takes place at numerous hundred nanometers when topographical changes takes place due to corrosion and formation of protective coating on the metal surface in the presence and absence of inhibitors respectively. KEYWORDS: Absorbance, anticorrosion; surface morphology; adsorption, molecular configuration. I. INTRODUCTION Corrosion can be viewed as a worldwide observable fact, ubiquitous and unstoppable. It is there everywhere, air, water, soil and in every background, we come across. The word corrosion 1 is as ripened as the globe which destroys the shimmer and magnificence of objects and curtails their life. Corrosion is a normal process 2 that weakens the binding energy in metals with the outcome concerning a metal being oxidized as the bulk metal looses one or more electrons. The lost electrons are conducted throughout the bulk metal to another location where they are reduced. Corrosion since prehistoric times has affected not only the excellence of everyday lives of people, but also their technical development. Corrosion is an extractive metallurgy in reverse. Corrosion can be prevented or at least controlled. Corrosion inhibitors are chemicals that react with the metal's surface or the environmental gases causing corrosion, thereby, interrupting the chemical reaction that causes corrosion. The use of chemical inhibitors is to decrease the rate of corrosion processes. A great number of scientific studies have been devoted to the subject of corrosion inhibitors. However, most of what is known has grown from trial and error experiments, both in the laboratories and in the field. The most useful technique to analyze the effectiveness of an inhibitor is weight loss measurements and electrochemical measurements like polarization curve method and the impedance measurements. In addition, microscopy techniques are used to characterize the corrosion process. For all types of inhibitors some environmental factors should be considered