The Inhibition efficiency of Rosemary oil (Rosmarinus officinalis) for corrosion control

of high carbon steel was done in citric acid medium by weight loss method. The Rosmarinus

officinalis was administered in the proportion of 0%, 0.50%, 1.00%, 1.50%, 2.00% and 2.50%

concentration. This study unveiled that the inhibition efficiency performed excellently with

maximum percentage of 88.3% at room temperature in 0.5M citric acid solution. This has shown

the effectiveness of Rosmarinus officinalis inhibitor in corrosion analysis of high carbon steel

Abatan, Olubunmi G.

Alao, G. T .

Busari, A. A.

Loto, R. T.

Odunlami, O. A.

OLOMUKORO, OBOROGHENE TOPE

Covenant University Repository

IOP Conference Series: Materials Science and EngineeringPAPER • OPEN ACCESSElectrochemical control of high carbon steelcorrosion using rosemary oil in citric acid mediumTo cite this article: O A Odunlami et al 2021 IOP Conf. Ser.: Mater. Sci. Eng. 1036 012051 View the article online for updates and enhancements.You may also likeStudy on Extraction Method of rosemaryantioxidantQiukai Zheng, Wei Li, Zhaoxv Lv et al.-Corrosion Inhibition of Rosemary Oil onHigh Carbon Steel in Sulphuric AcidMediumO A Odunlami, O T Olomukoro and R TLoto-Effect of adding some medical plants onsome productive performance traits ofJapanese Quail.Riyed K. Mossa, Majid H. Al-Asadi andMohammed H. Saleh-This content was downloaded from IP address 165.73.192.253 on 25/02/2022 at 09:46Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distributionof this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.Published under licence by IOP Publishing LtdICSID 2020IOP Conf. Series: Materials Science and Engineering 1036  (2021) 012051IOP Publishingdoi:10.1088/1757-899X/1036/1/0120511 Electrochemical control of high carbon steel corrosion using rosemary oil in citric acid medium                               O A*Odunlami1, O G Abatan1, A A Busari2, G T Alao3, R T Loto4, O T                              Olomukoro1                                               1Department of Chemical Engineering, Covenant University, Ota, Ogun state, Nigeria                                                               2Department of Civil Engineering, Covenant University, Ota, Ogun state, Nigeria                                              3Department of Mathematics, Covenant University, Ota, Ogun state, Nigeria                                              4Department of Mathematics, Covenant University, Ota, Ogun state, Nigeria  *Corresponding  olayemi.odunlami@covenantuniversity.edu.ng  Abstract. The Inhibition efficiency of Rosemary oil (Rosmarinus officinalis) for corrosion control of high carbon steel was done in citric acid medium by weight loss method. The Rosmarinus officinalis was administered in the proportion of 0%, 0.50%, 1.00%, 1.50%, 2.00% and 2.50% concentration. This study unveiled that the inhibition efficiency performed excellently with maximum percentage of 88.3% at room temperature in 0.5M citric acid solution. This has shown the effectiveness of Rosmarinus officinalis inhibitor in corrosion analysis of high carbon steel. Keywords: High Carbon Steel, corrosion inhibitors, weight loss method, rosemary oil.  1. Introduction Corrosion, the gradual destruction of materials due to chemical or electrochemical reaction with the environment. The easily identified occurrence of corrosion is the oxidation of Iron known as Rust. It has brought about great challenges to the applications of metallic material mostly in industries, such as petrochemical, food, automobile etc. [1-3] causing the destruction of industrial infrastructures. Therefore, corrosion control is required. The damage of metals by acids can be greatly controlled by the corrosion inhibitors. Researches have been carried out on both organic (nitrogen, Sulphur, oxygen) and inorganic (chromates, phosphates, molybdates) compounds as corrosion inhibitors [4-8]. Extracts of plants are found to be biodegradable, non-toxic, environment friendly, easily available and relatively cheap unlike the pure synthetic chemicals. Many of the naturally occurring substances like black pepper [9], onion, garlic [10] among others prevented corrosion of steels in different media from recent researches, also rosemary oil extract yielded 90% inhibitor efficiency on mild steel in water-base and 85% on 439LL ferritic stainless steel in 1M H2SO4 solution in previous researches[11,12]. As a result of these, rosemary oil was used to confirm the behavioral effect on high carbon steel in citric acid solution for this research.  This steel is among the commonest types of steel because of its high strength and low cost. Its material characteristics is widely preferred in several applications [13]. High carbon steels have 0.55 to 1.4% carbon. They are strong and hard, and the least ductile of the carbon steels [14]. They possess higher ICSID 2020IOP Conf. Series: Materials Science and Engineering 1036  (2021) 012051IOP Publishingdoi:10.1088/1757-899X/1036/1/0120512carbon content than mild carbon steel. They are used mostly in metal manufacturing such as drills, axes, saws, hammers, knives and wood [15]. This study investigates the effectiveness of Rosmarinus officinalis on high carbon steel in 0.5M citric acid at every 24 hours for 21days at room temperature by weight loss method.  2. Materials and method  The steel has the following composition: 0.9% Carbon, 0.5% Manganese, 0.04% Phosphorus, 0.05% Sulfur and 98.51% Iron. The samples were machined into cylindrical shapes of these dimensions: 1cm (L), 1.2cm (diameter) and 6.03cm2 (AS). Abrasive papers were used for the preparation of the metal surface. Rosmarinus officinalis, a leaf extract of a woody shrub-type plant which is a transparent yellowish liquid was used for corrosion inhibition in citric acid medium. It was purchased from Jannys beauty store in Ikoyi, Lagos. 2.1. Experimental procedure The weight loss analysis of the cylindrical shaped carbon steel coupons was done using weighing balance. The samples were immersed in 400ml of 0.5M citric acid solution. The experiment was exposed to the atmosphere and the coupons fully immersed at ambient temperature for 21 days. Each sample was analyzed every 24 hours after being washed with distilled water and dried.    3. Result  3.1. Weight loss plot The plots of weight loss against exposure time for high carbon steel in citric acid solution is shown below:             Figure 1. WL against exposure time of high carbon steel in 0.5M citric acid solution  3.2. Corrosion rate plot Rate of corrosion of carbon steel in citric acid solution is shown in the figure below:  00.511.522.530 100 200 300 400 500 600WeightLoss(g)Exposure Time (hours)0ml ROS2ml ROS4ml ROS6ml ROS8ml ROS10ml ROSICSID 2020IOP Conf. Series: Materials Science and Engineering 1036  (2021) 012051IOP Publishingdoi:10.1088/1757-899X/1036/1/0120513 Figure 2. Corrosion rate against exposure time of carbon steel in 0.5M citric acid solution  3.3. Corrosion rate plot The inhibitor efficiency of Rosmarinus officinalis from weight loss experiment in the corrosion of high carbon steel in citric acid is shown below:  Figure 3. Inhibition efficiency of Rosmarinus officinalis against exposure time in 0.5M citric acid.  4. Discussion of results The result showed that the maximum inhibition efficiency was obtained as 88.3% at 10ml inhibitor concentration. This could be traceable to the high performance of film protection formation of Rosmarinus officinalis on the surface of the steel sample to prevent further attack on the steel. Furthermore, the inhibitor also displayed an excellent level of adsorption process by protonating the steel samples from continuous corrosion effect. Adsorption process actually occurs by the interactive force between the molecular properties of rosemary oil and the surface of the high carbon steel samples.  5. Conclusion  Rosmarinus officinalis performed successfully well on high carbon steel with 88.3% maximum inhibitor efficiency in 0.5M citric acid solution. Therefore, rosemary oil displayed an excellent inhibition of high carbon steel which makes it suitable for industrial applications. This further explains the adsorption reaction between the surface of the high carbon steel and the Rosmarinus officinalis inhibitor. It also a high level of eco-friendly inhibitor for a sustainable world.  Acknowledgement The authors acknowledge Covenant University for the financial support offered in the publication of this research.   References [1] Fajobi M, Loto R and Oluwole O 2019 Corrosion in Crude Distillation Overhead System: A               Review. Journal of Bio-and Tribo-Corrosion 5(3) 67 0.00000.00500.01000.01500 100 200 300 400 500 600CorrosionRate(mmpy)Exposure Time (hours)0ml ROS 2ml ROS4ml ROS 6ml ROS8ml ROS 10ml ROS0204060801000 100 200 300 400 500 600InhibitionEfficiency(%)Exposure Time (hours)2ml ROS4ml ROS6ml ROS8ml ROS10ml ROSICSID 2020IOP Conf. Series: Materials Science and Engineering 1036  (2021) 012051IOP Publishingdoi:10.1088/1757-899X/1036/1/0120514[2]  Fajobi M, Fayomi O, Akande I and Odunlami O 2019 Inhibitive Performance of Ibuprofen Drug on                Mild Steel in 0.5 M of H2SO4 Acid. Journal of Bio-and Tribo-Corrosion, 5(3) 79 [3] Odunlami O, Elehinafe F, Oladimeji T, Fajobi M, Okedere O and Fakinle B     2018 Implications of lack of maintenance of motorcycles on ambient air quality. In IOP       Conference Series: Materials Science and Engineering   1 (413)  012-055 IOP Publishing [4] Refaey S Appl surf Sci., 2005, 240 (1-4), 396-402 [5]  Quiraishi M and Sharma H J Appl Electrochem., 2005 35(1), 33-39  [6]  Ashassi-Sorkhabi A, Shaabani B and Seifzadeh D Appl Surf Sci. 2005 239(2) 154-164   [7] Matheswaran P and Ramasamy A E-J Chem. 2010 7(3), 1090-1094 [8]  Ali  A, Saeed M and Rahman S Corros Sci. 2003 45(2), 253-266.  [9]  Pandian B and Mathur G Mater Lett. 2008 62(17-18)               2977-2979 [10]  Parikh K and Joshi K Trans SAEST 2004 39(3-4), 29-35 [11] Loto R and Oghenerukewe E (2016) Inhibition studies of rosmarinus officinalis on the pitting                  corrosion resistance 439LL ferritic stainless steel in dilute sulphuric acid. Oriental Journal of                Chemistry, 32(5), 2813-2832. [12]  Loto R and Busari A (2020) Inhibition effect of rosemary oil on mild steel corrosion in a                    water-based petrochemical drilling fluid. MS&E, 770(1), 012046.  [13] Loto R 2018 Electrochemical analysis of the corrosion inhibition properties of L-leucine and                   trypsin complex admixture on high carbon steel in 1M H2SO4 solution Quimic Aplicada y       Analitica, 47 (2), 12-20.  [14]  Davis J 2001 Surface Engineering for Corrosion and Wear Resistance. The Materials Information                Society ASM International, Materials park Ohio [15]  Osarolube E, Owate I, and Oforka N 2008 Corrosion behaviour of mild and high carbon steels in                 various acidic media. Scientific Research and Essay 3 (6) 224-228.  

Electrochemical control of high carbon steel corrosion using

rosemary oil in citric acid medium

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Electrochemical control of high carbon steel corrosion using rosemary oil in citric acid medium

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