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2 Polish Journal of Chemical Technology

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Corrosion process assessment using a novel type of coupon installation

Musik Daniel, Wójcik Krzysztof, Sekuła-Wybańska Małgorzata, Rakoczy Rafał

Polish Journal of Chemical Technology

2022

Vol. 24, nr 4

84--88

The main aim of this experimental study is to test the novel type of coupon installation. This set-up was used to carry out the corrosion process under aggressive conditions. Moreover, the effect of corrosion inhibitors on the scale-forming tendency was evaluated. The corrosive conditions were defined by using the Langelier Saturation Index (this index is an approximate indicator of the degree of saturation of CaCO3 in water) and the Ryznar stability index (this index is allowed to determine if the liquid sample is aggressive or not). Additionally, the inductively coupled plasma optical emission spectroscopy analysis was used to obtain the iron and calcium ions concentrations in the liquid samples from the tested coupon installation. The corrosion process for the established conditions was also described using the corrosion rate of the tested coupons. The obtained investigation contributes significantly by developing the novel coupon installation and demonstrating the procedure for testing the corrosion process with the application of coupons. This setup and method might be successfully applied for accelerated laboratory tests.

Heat transfer investigations in a liquid that is mixed by means of a multi-ribbon mixer

Borowski Tomasz, Sołoducha Dawid, Musik Daniel, Wójcik Krzysztof, Chyla Mariusz, Ziętarska Katarzyna, Friedrich Małgorzata, Kiełbus-Rąpała Anna, Kordas Marian, Konopacki Maciej, Rakoczy Rafał

Polish Journal of Chemical Technology

2021

Vol. 23, nr 2

66--72

The objective of this paper is to present the investigations of the heat transfer process carried out by means of the multi-ribbon mixer. It is shown that the heat transfer process for the synergic effect of the mixing process and the flowing liquid through the mixer has significantly higher values of the heat transfer coefficients than the mixer with motionless impellers. The empirical correlations between the heat transfer coefficient and the operational parameters obtained in this work can provide guidance for the design and operation of an apparatus equipped with the multi-ribbon impeller. These empirical correlations can be used to predict the heat transfer coefficient for the multi-ribbon mixer.