Metal finishing Q&As since 1989

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How to fight corrosion of steel baghouse by acidic flue gas

CAN ANYONE RECOMMEND A PRODUCT/PROCESS THAT WILL PROTECT OUR STEEL FABRICATED BAGHOUSE, THIS IS EXPOSED TO ACIDIC FLUE GAS, HENCE SUFFERS FROM SEVERE CORROSION PROBLEMS.

BRIAN MANSFIELD
CONTROLLER INCINERATION PROCESS - LONDON, ESSEX, ENGLAND
2003

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2003

Brian,

My first question is WHY are you using mild steel if you ... or someone else ... knew that there is a corrosion problem?

Also what is the temperature that this unit is exposed to?

For your info, which might give you some ideas, a chimney Company (Custodis Chimney) made/makes chimney liners from fibreglass (for example l2 feet dia x 200 feet high as in the Dominican Republic) using Hetron l97 polyester. Mfg. by Alcore in Richmond Hill, Ontario.

Hence, IF,IF,IF the temperature is not too high, then please consider lining the inside with fibreglass.

Freeman Newton [deceased]
(It is our sad duty to advise that Freeman passed away
April 21, 2012. R.I.P. old friend).

Corrosion of baghouses is a common problem when the combustion gases have high % sulfur oxide and moisture. The combination of heat, acid attack and abrasion is very severe. There is a new technology called FlueGard-225, successfully used in the cement industry in the US by a company called Penta Engineering out of St. Louis. The have made multiple applications in baghouses, ducts, fans and stacks with great results.

Linas Mazeika
materials technology - Mountain View, California
2004