What are the advantages and disadvantages of galvanized steel heat exchanger? I am generating flue gases through pyrolysis process. Can I pass the flue gases through galvanized steel heat exchanger to heat water?

  • $\begingroup$ What gases are present in your pyrolysis gas, will there be condensation in the heat exchanger? With galvanized components be especially wary of any nitrogen compounds. Pyrolysis gas is a wide range of mixtures, ultimately you need to provide us the relevant species in your gas. $\endgroup$
    – mart
    May 10 at 11:40
  • $\begingroup$ What are you pyrolyzing? Wood? Garbage? $\endgroup$
    – Mark
    May 11 at 0:45

1 Answer 1


I presume you mean galvanized steel. Galvanizing would be a waste of time for flue gas. Carbonic acid ( CO2 + water) would dissolve/corrode the zinc. Sulfurous acid could be present causing even faster corrosion. Generally flue gases are a challenge for corrosion control.


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