New Environmentally-Friendly Corrosion Inhibitor Based on Plant Extracts and Technology Of Chemical Cleaning of Thermal Power Equipment with its Use
Keywords:plant raw material extracts, tannins, eco-inhibitors, corrosion rate, salt deposition, technological scheme of inhibitor synthesis, acid-inhibitory cleaning.
Introduction. Improvement of environment ecological state is connected with ensuring stable anti-corrosion protection of the metal fund in chemical, gas and oil and energy industries. In particular, conducting high-quality chemical cleaning of thermal power equipment requires the use of effective eco-friendly corrosion inhibitors.
Problem Statement. Insufficient attention is paid to the problem of creating eco-inhibitors despite the
presence of plant raw materials in Ukraine in the form of wastes of food industry, wood processing, etc.
Purpose. New environmentally friendly inhibitor based on plant extracts and the technology of chemical treatment of thermal power equipment with its use.
Materials and Methods. Raw materials are oak chips and sawdust, extraction methods are based on the use of aqueous organic and mixed solvents, gravimetric and electrochemical methods for investigating the protective
properties of extracts and synergistic compositions based on them, methods of analytical chemistry.
Results. The developed eco-inhibitor is a synergistic composition based on oak extract with eco-friendly
additives (xanthan gum, urotropin, thiourea, Siegnette salt, urea, technical glycerin and others). It has been found
that the effectiveness of the inhibitor in 5% hydrochloric acid is more than 90%, the mechanism of its protective
action is mixed and consists in adsorption of synergistic composite components. The presence of eco-inhibitor in the composition of washing solutions don’t affect the completeness of dissolution of carbonate deposits as compared with non-inhibiting medium, but twice reduces time of removing salts and corrosion products from heatexchange surface of power engineering equipments. The technological regulations and temporary specifications for its synthesis and the technological instruction for acid-inhibitory cleaning of thermal power equipment have been developed.
Conclusions. An experimental batch of eco-inhibitor has been obtained. The resulting product has passed
laboratory and full-scale industrial tests that confirm its effectiveness in the composition of washing solution
Khvesyk, M. A. (2016). Water Resources in measurements of Ukraine’s natural wealth. Kyiv: Institute of Environmental Economics and Sustainable Development. 108 p.
Maanonen, M. (2014, January). Steel pickling in challenging conditions. Thesis. Bachelor of Engineering Materials Technology and Surface Engineering. Metropolia University of Applied Science, January 21—23, 2014, Helsinki, 3—10.
Kasimov, O. M., Hayrapetyan, T. S. (2017). Reverse and closed water supply systems of industrial enterprises. Kharkiv: O.M. Beketov National University of Urban Economy in Kharkiv. 150 p.
Slobodyan, Z. V. (1987). Inhibitory protection of steel from corrosion, corrosion fatigue and salt deposition: Thesis of Candidate of Technical Sciences. Lviv. 18 p.
Slobodyan, Z. V. (2006). Extension of service life of turbines condenser tubes by the use of new acid-inhibiting washing solutions. In the book: Resource and safety issues of exploiatation of constructions, structures and machines. Kyiv. P. 129—133.
Babei, Yu. I., Sopruniuk, N. G. (1981). Protection of metals against corrosion-mechanical destruction. Kyiv: Technique. 124 p.
Antropov, L. I., Makushin, E. M., Panasenko, V. F. (1981). Corrosion inhibitors of metals. Kyiv: Technique. 182 p.
Abdel-Gaber, A. M., Abd-El-Nabej, B. A., Khamis, E., Abd-El-Khalek, D. E. (2011). The natural extract as scale and corrosion inhibitor for steel surface in brine solution. Desalination, 278, 337—342.
Raja, P. B., Seturaman, M. G. (2008). Natural products as corrosion inhibitors for metals in corrosive media. Materials Letters, 62, 113—116.
Amitha Rani, B.T., Bharathi Bai, J. Basu. (2012). Green Inhibitors for Corrosion Protection of Metals and Alloys: An Overwiew. International Journal of Corrosion, ID380217, 1—15.
Younes Shirmohammadli, Davood Efhamisisi, Antonio Pizzi. (2018). Tannins as sustainable raw material for green chemistry: A review. Industrial Grops & Products, 126, 316—332.
Behpour, M., Ghoreishi, S.M., Rhayatkashani, M., Soltani, N. (2012). Green approach to corrosion inhibition of mild steel in two acid solutions by extract of punica granatum peel and main constituents. Materials Chemistry and Physics, 131, 621—633.
Slobodyan, Z., Khabursky, Ya., Gorak, Y. (2012). Oak bark extracts — “green” corrosion inhibitors of carbon steels in neutral and acidic environments. Bulletin of TNTU, 4(68), 73—80.
Slobodyan, Z. V., Mahlatyuk, L. A., Kupovych, R. B., Khabursky, Y. M. (2014). Compositions based on extracts of oak bark and chips - inhibitors of carbon steels in water. Phys.-Chem. Mechanics of Materials, 5, 58—66.
Slobodyan, Z. V., Kupovych, R. B., Mahlatyuk, L. A. (2009). The effect of tannin extracts on the corrosion resistance of steel 20 in tap water and 5% HC1. Phys.-Chem. Mechanics of Materials, 4, 120—121.
Patent of Ukraine №128514. Int.Cl. C21D 7/02 (2006.01), B23P 6/04 (2006.01). Method of fatigue crack growth inhibition. Nykyforchyn G. M., Pustovyi V. M., Slobodyan Z. V., Khabursky Y. M., Barna R. A., Zvirko O. I., Kret N. V. [in Ukrainian].
How to Cite
Authors published in the journal “Science and Innovation” agree to the following conditions:
Authors retain copyright and grant the journal the right of first publication.
Authors may enter into separate, additional contractual agreements for non-exclusive distribution of the version of their work (article) published in the journal “Science and Innovation” (for example, place it in an institutional repository or publish in their book), while confirming its initial publication in the journal “Science and innovation.” Authors are allowed to place their work on the Internet (for example, in institutional repositories or on their website).