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Acidic corrosion in boilers

Galvanic corrosion

Caustic corrosion

Acidic corrosion

Hydrogen embitterment

Oxygen attack

Carbon dioxide attack


Low make up feed water pH can cause serious acid attack on metal surfaces in the preboiler and boiler system. Feed water can also become acidic from contamination of the system (process contamination of condensate or cooling water contamination from condensers).
Acidic corrosion can also be caused by chemical cleaning operations (overheating of the cleaning solution, excessive exposure of metal to cleaning agent, high cleaning agent concentration).

In the boiler and feed water system, acidic attack can take the form of general thinning, or it can be localized at areas of high stress.

Acidic corrosion

Find information about the main problems occurring in boilers: scaling, foaming and priming, and corrosion.
For a description of the characteristics of the perfect boiler water click here.
Check also our web page about boiler feed water and boiler water treatment, in particular through deaeration (deaerating heaters or membrane contractors).

Water treatment handbook Vol. 1-2, Degremont, 1991
Industrial water conditioning’, BeltsDearborn, 1991

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