MIC In Radiators

MIC in radiator

 

 

 

Building: Large government office building.

Manifestation: Blocking of radiators with sludge and pinhole leaks in bottom of radiators under sludge with a few years of operation.

Cause: LTHW system contained a large amount of non-barrier plastic pipework which allowed oxygenation of system water. Iron oxide corrosion debris accumulated in bottom of radiators and growth of sulphate reducing bacteria (SRB) under sludge led to microbial influenced corrosion (MIC) and localised pitting. 

Solution: System too badly affected for any remediation to be effective

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