Reduction of scale deposited in heat exchange equipment

• V.A. Golovin, S.A. Tyurina and V.A. Shchelkov

A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky pr. 31, 119071 Moscow, Russian Federation

Abstract: This review is devoted to a range of issues related to reducing scale formation of heat exchange surfaces. The mechanisms of formation of scale deposits, the influence of structural materials used in equipment, as well as technological parameters of heat exchangers on the formation of deposits are considered. The analysis of the relationship between corrosion lesions and scale formation, mechanical, physical and chemical methods for removing and reducing the rate of scale formation, theoretical issues and experience in the use of phosphonate scale inhibitors. Considerable attention is paid to new methods of surface treatment of heat transfer surfaces, including the development of new polymer anticorrosive and anti-chip coatings and experience in their use. The potential effectiveness and prospects of solutions for the use of superhydrophobic additives and microcapsulated inhibitors are considered. Literature data show that the introduction of effective, environmentally and cost-effective methods aimed at preventing scale formation and self-cleaning will allow maintaining high performance of heat exchange equipment and avoiding unforeseen equipment repair costs associated with the development of corrosion processes on the internal surfaces of heat exchange equipment. One of the most efficient and environmentally friendly methods can be to apply anti-scaling or self-cleaning coatings on the heat exchange surfaces, which also makes it possible to simplify the cleaning of heat exchangers and preserve the characteristics of heat exchange.

Keywords: scale deposits, corrosion, inhibition, heat exchangers, polymer coatings

Int. J. Corros. Scale Inhib., 2021, 10, no. 2, 441-479 PDF (960 K)
doi: 10.17675/2305-6894-2021-10-2-1

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