Cracked refractory stone wood boiler, is it serious?

[boomcox]

Hello,

Thank you for all these specific tips!

Good night

Nicolas

[boomcox]

Particular attention should be paid to the condition of the interior sheet metal at the bottom of the hearth: it is common for condensation of acid vapors in the lower parts to attack the sheet metal and cause leaks...

Yes, the tendency to oxidation is a tangible fact over time. I stop this phenomenon with diluted citric acid without rinsing, it's like the Frameto for much cheaper and without danger.

GuyGadeboisLeRetour when you say that you stop rust with citric acid is it a good idea but it doesn't go away with heat?

Have a good day!

[Ahmed]

Guy is no longer here to answer you, but I don't understand your question: can you rephrase it?

[boomcox]

In fact, he says he puts dilute citric acid at the bottom of the firebox to limit oxidation, but with the heat it doesn't "burn" the acid?
It's just a question of understanding, he can answer when he comes back through it otherwise.

Thank you all for your interest in the subject.

[Ahmed]

The acid combines with the iron oxide to form a new stable ferric compound and the heat does not change this. However, this probably does not prevent the combustion acids from continuing their destructive work in the coldest parts where combustion gas condensation occurs.