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IJSTR >> Volume 9 - Issue 2, February 2020 Edition



International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616



Improving The Efficiency Of Heat Exchange Equipment Using Corrosion And Scale Inhibitors

[Full Text]

 

AUTHOR(S)

Gulchekhra Rikhsikhodzhaeva, Bakmanzhan Smanov, Bakhtiyarulla Ubaidullaev, A.N. Rizaev, Basit Khamidov, Vitaliy Guro

 

KEYWORDS

Corrosion, corrosion rate, concentration, inhibitor, scaling, heat exchange, equipment

 

ABSTRACT

Background of the problem. The efficiency of heat exchange equipment in a closed indoor water supply depends on corrosion and the deposition of mineral salts on their surface. This is due to a decrease in the values of heat transfer coefficients between the aqueous medium and the wall of the heat exchangers. In this regard, the prevention of mineral deposits in water systems and corrosion of carbon steel pipes and equipment is one of the most important tasks. The problem, so far, has been solved with the use of scale inhibitors, which were imported from abroad for the oil refineries of our Republic, therefore, the development and implementation of new compositions of corrosion and scale inhibitors based on local raw materials is a solution not only to import substitution, but also to innovative technology . The aim of this work is to develop corrosion inhibitors and scaling based on analyzes of the electrochemical properties of water, with different ratios of activator ions present in the aquatic environment. Methodology. The degree of inhibitory protection Z = [100% (ic ° - ic ') / ic °], where ic ° and ic' are the corrosion rates in the absence and presence of an inhibitor, evaluated by polarization curve (PC) methods (PI-50-1 potentiostat , potentials - on the scale of N.V.E.) and polarization resistance (PS) (P-5035 corrosion meter), measured on electrodes from Art. 20 with a purity of the air-oxidized surface Rz ≤ 10 μm, characterized by the ratio of the area (S) to the volume of the solution (V), cm2 / cm3, not more than 1:10 (for PC and PS S = 0.5 and 25 cm2). Gravimetric measurements (GI) were carried out under static and dynamic conditions (stirring, 300 rpm) for ≤30 days on samples from Art. 20 (Rz ≤ 20 μm, s = 26.9 cm2; S / V = 1:20). The inhibition of the scaling process was determined using the operating instructions on an ISO-1 device. Scientific novelty. It was established that the concentration of chemicals affecting the corrosive properties of water found in natural waters should not exceed, after their purification, standards in accordance with GOST 2877-82. The nature of the course of corrosion depends on the ions present in the corrosive medium, mainly anions. Received data. The effectiveness of the use of corrosion and scale inhibitors GPMSC and IONX-1 relative to imported HEDPA was determined. When the value of the corrosion rate for GPMSh is 0.0000064287; IONX-1 - 0.0000083722; and OEDPC - 0.0000245186. The effectiveness of the inhibition of scaling for GPMS - 91.76%; for IONX-1 - 89.41%; and for an imported scale inhibitor of HEDPK - 94.11%.

 

REFERENCES

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