The chemical composition of some geothermal waters from Romania were interpreted by using the Watch program, which gives information about the mineral equilibrium and a basis to assess possible scaling and corrosion problems.

The Ciumeghiu geothermal field was chosen for study. Chemical analysis from a well were selected for interpretation. Samples were taken and total analyses were made. The results were compared to results of former years by using the Watch program and the saturation index for different minerals calculated.

During exploitation of these waters, scale deposits were noticed. A solid sample of these depositions was analysed by X-ray diffraction, by infrared spectrometry and thermo-differential. For monitoring of scaling and corrosion a scaling device was proposed.

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