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06536 CORROSION EFFECTS FROM HIGH IRON CONCENTRATION IN ALKALINE CHELANT BOILER CLEANING

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If the iron concentration in an alkaline chelant boiler cleaning solution reaches a high value when dissolving magnetite, it sometimes continues to increase rapidly and not level, indicating corrosion of the boiler metal. A laboratory study of “runaway iron increases” investigated the cause and the best mitigation methods.

 

Product Number: 51300-06536-SG
ISBN: 06536 2006 CP
Author: J. W. Horvath, J. F. Harvey
Publication Date: 2006
Industries: Process Industries , Corrosion Monitoring and Control
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It has frequently been observed that if the iron concentration in an alkaline chelant boiler cleaning solution reaches a high value when dissolving magnetite, it sometimes continues to increase rapidly and not level, indicating corrosion of the boiler metal. A laboratory study of “runaway iron increases” investigated the cause and the best mitigation methods. Waste chelant solutions with high iron concentrations require extra treatment steps unless evaporation is used for waste disposal.

Keywords: corrosion, chelant, boiler, cleaning, inhibitor, waste, disposal

It has frequently been observed that if the iron concentration in an alkaline chelant boiler cleaning solution reaches a high value when dissolving magnetite, it sometimes continues to increase rapidly and not level, indicating corrosion of the boiler metal. A laboratory study of “runaway iron increases” investigated the cause and the best mitigation methods. Waste chelant solutions with high iron concentrations require extra treatment steps unless evaporation is used for waste disposal.

Keywords: corrosion, chelant, boiler, cleaning, inhibitor, waste, disposal

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