Acta Chimica Slovaca (ACS) publishes papers on fundamental and applied aspects of chemistry, biochemistry, chemical technology, chemical engineering and process control, biotechnology and food technology. Welcome are also topics which include chemical aspects of materials, physical chemistry and chemical physics, analytical chemistry, macromolecular chemistry and biomedical engineering.

Corrosive Effects of Nitrate—Containing Phase Change Materials Used with Copper

Vladimír Danielik *, Peter Šoška, Katarína Felgerová

Slovak University of Technology in Bratislava, Institute of Inorganic Chemistry, Technology and Materials, Radlinského 9, SK – 812 37 Bratislava, Slovakia

E-mail: * vladimir.danielik@stuba.sk

Abstract: The paper presents the results of a study on the corrosion behaviour of copper (EN CW004A) in five possible phase change materials (PCMs): magnesium nitrate hexahydrate pure and with an addition of Mg(OH)2 (0.5 wt. %) or Sr(OH)2 (0.5 wt. %) at 90 °C, calcium nitrate tetrahydrate at 50 °C and a mixture of magnesium nitrate hexahydrate and calcium nitrate tetrahydrate (1:1 mass ratio) at 72 °C. The corrosion rate of copper samples is low except for the use of Mg(NO3)2·6H2O with/without an addition of Mg(OH)2. The lowest corrosion rate was observed for the mixture Mg(NO3)2·6H2O – Ca(NO3)2·4H2O (1:1), and it was ca six times lower than that of pure magnesium nitrate hexahydrate.

Keywords: phase change materials, latent heat storage, magnesium nitrate, calcium nitrate, copper, corrosion rate

Full paper in Portable Document Format: acs_0244.pdf

Acta Chimica Slovaca, Vol. 9, No. 2, 2016, pp. 75—83, DOI: 10.1515/acs-2016-0013