Concrete Corrosion Prediction from gaseous H2S concentration
Concrete Corrosion Prediction from gaseous H2S concentration
(OP)
I'm looking for formulas, research papers, nomographs, etc. that can be used to help predict the pH on concrete manhole walls due to microbially induced corrosion from thiobacillus reduction of h2s to H2SO4. I presume the resultant pH and corrosion effects can be or have been correlated to gaseous H2S concentration. A little guidance to some previous research will be greatly appreciated.





RE: Concrete Corrosion Prediction from gaseous H2S concentration
RE: Concrete Corrosion Prediction from gaseous H2S concentration
RE: Concrete Corrosion Prediction from gaseous H2S concentration
RE: Concrete Corrosion Prediction from gaseous H2S concentration
The amount of oxygen (ventilation), washing/drying cycles and the composition of upstream sewage generators seem to have a significant effect on H2S attack, in my experience, but there are probably other major influences too.
Neutralisation of concrete never seems to have progressed very far when I have checked, perhaps due to progressive erosion of the concrete as a result of H2S attack. Some of the wet wells I've inspected have lost over 50 mm of concrete over 30 years or so but neutralisation has only progressed a few millimetres into the remaining concrete. I have found similar results with wet wells that have lost less than 20 mm of concrete over the same period.