Recommendations for treatment of water for steam boilers and water heaters|Nickel, Water, Silicon dioxide, Water purification, Corrosion protection, Fire-tube boilers, Phosphates, Contamination, Impurities, Feedwater, Water-tube boilers, Water supply engineering, Water treatment, Condensation, Hot-water boilers, Carbonates, Steam boilers, Copper, Alkalinity, Calcium inorganic compounds, Corrosion, Water testing, Oxygen, Corrosion inhibitors, Water softening, pH, Iron, Hot-water supply systems, Heaters, Chemical analysis and testing, Water heaters, Scale (corrosion), Electrical conductivity, Boilers