Available online www.jocpr.com Journal of Chemical and Pharmaceutical Research, 2018, 10(3):154-166 Research Article ISSN : 0975-7384 CODEN(USA) : JCPRC5 154 Corrosion Inhibition Efficiency of Pistachio Galls Extract of X70 Steel in H 2 SO 4 1 N M Ferhat 1* , M Kacheba 1 , AS Benmebarek 1 and M Yousfi 2 1 Mechanic Laboratory, University of Laghouat-Ghardaia Road, Laghouat, Algeria 2 Laboratory of Fundamental Sciences, University Amar TÉLIDJI of Laghouat, Ghardaïa Road, Laghouat, Algeria _____________________________________________________________________________ ABSTRACT The aim of this work is to use a natural substance recovered from pistachio galls as anticorrosion agent, another opportunity to exploit natural resources. The present study investigates the inhibiting effect of extracts from pistachio galls of Atlas. Electrochemical methods associated with the infrared Fourier transform spectroscopy are used. The results show that this substance can be used as an ingredient for the design of a new family of greener and less costly inhibitors. The Electrochemical study showed that pistachio galls act in electrostatics interaction with the steel surface, and thus by physical adsorption. The analysis FTIR spectroscopy confirms this result. Keywords: Corrosion; Green inhibitor; Steel X70; EIS; FTIR _____________________________________________________________________________ INTRODUCTION Corrosion is both costly and dangerous. Billions of dollars are spent annually for the replacement of corroded structures, machinery, and components, including metal roofing, condenser tubes, pipelines, and many other items. In addition to replacement, costs are those associated with preventive maintenance to prevent corrosion. In the oil extraction and processing industries, Inhibitors have always been considered to be the first defense line against corrosion. A great number of scientific studies have been devoted to the subject of corrosion inhibitors. By definition, corrosion inhibitor is a chemical substance that, when added in small concentration to an environment, effectively decreases the corrosion rate. Additions of certain chemicals are made to the environment; nevertheless, most of these synthetic organic compounds are not only expensive but also toxic for live beings. Now, the restrictive environmental regulations have made researchers to focus on the need to develop cheap, non-toxic and environmentally benign natural corrosion inhibitors, with the increasing awareness of environmental pollution problems. This often places severe restrictions on the choice of inhibitor. The disposal of chromate and phosphate inhibitor formulations is important in this respect and there is an increasing move towards the low-chromate-phosphate types of formulation. In fact for some applications even this approach is not acceptable and inhibitor formulations containing bio-degradable chemicals are being introduced. These toxic effects have led to the use of natural products as anticorrosion agents which are eco-friendly and harmless. Some researcher groups have reported the successful use of naturally occurring substances (e.g. plant extracts) as green corrosion inhibitors for metallic materials in various corrosives media. Gece [1] has pointed out the same conclusion in using the drugs. Lately alternative eco-friendly corrosion inhibitors are developed, they range from rare earth elements [1-3] to organic compound [4,5]. Since 1930, plant extracts (dried stems, leaves and seeds) of Celandine (Chelidonium majus) and other plants were used in H 2 SO4 pickling baths [6]. A Djemoui et al. [7] reported that alkaloids extract from Peganum harkmala give adequate protection to 6063 aluminium alloy in 1 M HCl in a temperature range 25 to 40°C LK Ojha et al. [8] found that Fenugreek leaves extract could be good inhibitors for mild-steel in a 1M