Smokeless fuel - corrosion issue!

FreeBear

lohr500 said: They all seem to suggest that sulphuric acid is a problem. Perhaps they are all perpetuating a myth?

Whilst most grades of stainless steel are resistant to sulphuric acid at room temperature, it will corrode at the sorts of temperatures found in an average flue liner. What makes it even worse is low concentrations of sulphuric acid will attack stainless steel even quicker at high temperatures. A brief overview of the problem is outlined here - https://bssa.org.uk/bssa_articles/selection-of-stainless-steels-for-handling-sulphuric-acid-h2so4/

There are a number of scholarly research papers on the subject if you really want to get in to the technical details...

A._Badger

FreeBear said:

lohr500 said: They all seem to suggest that sulphuric acid is a problem. Perhaps they are all perpetuating a myth?

Whilst most grades of stainless steel are resistant to sulphuric acid at room temperature, it will corrode at the sorts of temperatures found in an average flue liner. What makes it even worse is low concentrations of sulphuric acid will attack stainless steel even quicker at high temperatures. A brief overview of the problem is outlined here - https://bssa.org.uk/bssa_articles/selection-of-stainless-steels-for-handling-sulphuric-acid-h2so4/

There are a number of scholarly research papers on the subject if you really want to get in to the technical details...

Yes, but the particular issue was with glass.