Boiler Operation Engineer Interview Question - 7
What is cold end corrosion in boiler and When it occurs?
Ans.
During Cold Start up, flue gas temperature may go below acid dew point as a result sulphur- di- oxide react with moisture content in flue gas and leads to formations of Sulphuric Acid.
When acid comes in contact with tubes it leads to acid attack of tubes.This is meant by cold End Corrosion.
To avoid this, during cold start up lignite with low sulphur content be used.
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