Characterization of the Corrosive Action of Mineral Waters from Thermal Sources: A Case Study at Azores Archipelago, Portugal

Water

Helena Cristina Vasconcelos²  Bibiana Mar໚ Fernández-Pérez³  Sergio González³  Ricardo Manuel Souto³  Juan José Santana¹ 

[1] Department of Process Engineering, University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria 35017, Gran Canaria, Spain; E-Mail:;Department of Technological Sciences and Development, University of the Azores, Ponta Delgada 9501-801, Portugal;Department of Chemistry, University of La Laguna, P.O. Box 456, La Laguna 38200, Tenerife, Spain; E-Mails:

关键词: mineral waters;    thermal sources;    corrosivity;    encrusting power;    analytical modelling;    electrochemical testing;   

DOI  :  10.3390/w7073515

来源: mdpi

【 摘 要 】

Waters from natural sources of the São Miguel Island in the Azores archipelago have been investigated regarding their corrosive action on metallic materials. The corrosive and encrusting characteristics of the waters have been established in terms of relevant chemical parameters (namely pH, conductivity, total dissolved solids (TDS), and concentrations of bicarbonate, calcium, magnesium, chloride, and sulfate ions) and their temperature by using Langelier, Ryznar, Puckorius and Larson–Skold indexes. The validity of this methodology has been tested by measuring the corrosion rates of various metals exposed to various waters using electrochemical methods. The materials of industrial interest under investigation were carbon and galvanized steel, zinc, 304 and 316L grade stainless steels, brass, and Cr–Ni alloys. The greater aggressiveness of these waters was found for the less noble materials, and they experienced high corrosion rates.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.