Effect of natural and process water on metal corrosion

Comparative Assessment of Corrosion Behaviour of Mild Steels 3, 20 and 08KP in Tap Water

“…The analysis of the weight loss data demonstrates that the corrosion rate for all the steels studied decreases with time reaching the level of 0.06-0.04 mm/year. Similar values are reported for those steels by V. Parshutin and co-authors [18], who investigated steel corrosion in water of different composition. Also, the results obtained by the laboratory of water heating systems of MOSENERGO gives the value of 0.04-0.067 mm/year for general corrosion of steel 20 in tap water [19].…”

The use of a redox indicator to determine corrosiveness of wastewater towards metal structures

“…A significant amount of free carbon dioxide in water hinders the formation of solid protective films on metal. Iron oxide deposits are loose and can be easily washed away with a water flow [17]. If there is a deficit of dissolved oxygen in water, soluble iron oxide bicarbonate is formed:…”

“…With free carbon dioxide present in water in the amount exceeding an equilibrium concentration (aggressive carbon dioxide), the formation of calcium carbonate deposits is constrained creating conditions for corrosion intensification [18]. During wastewater treatment, in the aero tank there are conditions of the increased concentration of CO 2 , which is a product of metabolism of microorganisms [11].…”