[01] Sahib Mohammed Mahdi, Materials Engineering Department, Engineering College, Mustansiriyah University, Baghdad, Iraq. [02] Amer Hameed Majeed, Materials Engineering Department, Engineering College, Mustansiriyah University, Baghdad, Iraq. [03] Ghada Mazin Hani, Materials Engineering Department, Engineering College, Mustansiriyah University, Baghdad, Iraq.

The corrosion problem is one of the most important problems in our days, because it causes very series economic problems for construction and plant. Therefore, many research are carried out in various fields in order to reduce loses specially in oil extraction method because the equipment used in this field are very expensive and the corrosion of it causes a serious problem. In this study fresh olive leaves extraction used as corrosion natural inhibitor for protection steel pipe and equipment used in field of oil extraction, at temperatures (25°C and 45°C), in medium solution that was prepared in the following concentration to stimulate the field environment for oil extracting. (19.2% of sodium chloride (NaCl), 8% of calcium chloride (CaCl), 1.08% of magnesium chloride (MgCl) and saturated with CO₂ gas, the corrosion rate of steel sample were measured be using a potentiostat device with reference of calomel electrode. This project is to simulate and evaluate the corrosion behaviours and the extent of inhibition of fresh olive leaves extraction. The result was, the fresh olive leaves extract is an effective inhibitor material. Fresh olive leaves extraction inhibitor has a low corrosion rate at 25°C and 45°C and the Corrosion rate increase with increasing temperature for oil extraction solution. These results are induct to use the fresh olive leaves extraction as green inhibitor for steel pipe and structures.

Fresh Olive Leaves, Potentiostat, Inhibitor Efficiency, Electro-Chemical Polarization

[01] Ghulamullah Khan, S. N. Kazi, Wan Jeffrey Basirun and Ghulam Mustafa Khan, " Application of Natural Product Extracts as Green Corrosion Inhibitors for Metals and Alloys in Acid Pickling Processes-A review ", nternational journal of electrochemical science no. 10 (8): pp. 6120-6134 August 2015. [02] Joanna Brzeszcz and Anna Turkiewicz." Corrosion inhibitors – application in oil industry'. NAFTA-Gas, National Research Institute, 2015. [03] M. A. Amin, K. F. Khaled, Q. Mohsen, and H. A. Arida, " A study of the inhibition of iron corrosion in HCL solutions by some amino acids ". Corrosion science, vol. 52, no. 5, pp. 1684-1695, May. 2010. [04] Ghada M. Hani, Sahib M. Mahdi, and Amer H. Majeed” Using Dry Olive Leaves for Oil Pipes Corrosion Inhibitor”, EJERS, European Journal of Engineering Research and Science Vol. 4, No. 3, March 2019. [05] Rami A. Qassim, Sahib M. Mahdi, and Jafar G. Majeed” The Behavior of Olive Stone Powder at High Temperature Steel Corrosion “, EJERS, European Journal of Engineering Research and Science Vol. 3, No. 2, February 2018. [06] Rami A. Qassim, Sahib M. Mahdi, and Jafar G. Majeed” USING OLIVE STONE POWDER FOR STEEL CORROSION INHIBITION “, Journal of Engineering and Sustainable Development Vol. 22, No. 02 (Part -1), March 2018. [07] N. O. Obi-Egbedi, K. E. Essien, and I. B. Obot." Computational simulation and corrosion inhibitive potential of alloxazine for mild steel in 1M HCl". Journal of Computational Methods in Molecular Design, vol. 1, no. 1, pp. 26-43, 2011. [08] A. Hamdy, Nour Sh. El-Gendy,” Thermodynamic, adsorption and electrochemical studies for corrosion inhibition of carbon steel by henna extract in acid medium.”, Egyptian Journal of Petroleum, Vol. 22, No. 1, pp. 17-25, 2013. [09] Y. Abboud, B. Hammouti, A. Abourriche, B. Ihssane, A. Bennamara, M. Charrou, and S. S Al-Deyab " 2- (o-Hydroxyphenyl) Benzimidazole as a New Corrosion Inhibitor for mild Steel in Hydrochloric Acid Solution". n Int. J. Electrochem. Sci., no. 7, pp. 2543 – 2551, 2012. [10] Ahmed A. Al-Amiery, A. A. Kadhum, A. H. Alobaidy, A. B. Mohamad, and P. S. Hoon." novel corrosion inhibitor for mild steel in HCL". Materials, vol. 7, no. 2, pp. 662-672, 2014. [11] Carlos Crisosto and Ellen G. Sutter." Role of the Endocarp in 'Manzanillo' Olive Seed Germination "J. AMERS. oc. HORT. Sa. No. 110 (1), pp. 50-52. 1985 [12] Ayssar Nahl´e, Ideisan Abu-Abdoun, Ibrahim Abdel-Rahman, andMaysoon Al-Khayat, " UAE Neem Extract as a Corrosion Inhibitor for Carbon Steel in HCl Solution"International Journal of Corrosion, Aug. 2010. [13] Sahib Mohammed Mahdi, " Study the Pomegranate's Peel Powder as a Natural Inhibitor for Mild Steel Corrosion". International Journal of Materials Chemistry and Physics Vol. 1, No. 1, pp. 74-81, 2015. [14] W. B. Wan Nik, F. Zulkifli, R. Rosliza and M. M. Rahman." Lawsonia Inermis as green inhibitor for corrosion protection of aluminium alloy". International Journal of Modern Engineering Research, Vol. 1, Issue 2, pp-723-728, 2011. [15] B. E. Amitha Rani and Bharathi Bai J. Basu." Green Inhibitors for Corrosion Protection ofMetals and Alloys: An Overview". International Journal of Corrosion, 2012. [16] Kesavan Devarayan, Gopiraman Mayakrishnan, and N. Sulochana." Green Inhibitors for Corrosion of Metals: A Review". Chemical Science Review and Letters, no. 1 (1), pp. 1-8, 2012. [17] Hui Cang, Zhenghao Fei, Hairong Xiao, Jiali Huang, and Qi Xu." Inhibition Effect of Reed Leaves Extract on Steel in Hydrochloric Acid and Sulphuric Acid Solutions"Int. J. Electrochem. Sci., no. 7, pp. 8869 – 8882, 2012. [18] Omotoyinbo, J. A., Oloruntoba, D. T. and Olusegun, S. J." Corrosion Inhibition of Pulverized Jatropha Curcas Leaves on Medium Carbon Steel in 0.5 M H₂SO₄ and NaCl Environments". International Journal of Science and Technology Vol. 2 No. 7, July, 2013.