Main causes for degradation of a heating water system

Main causes for degradation of a heating water system

1/ Scale: reduces the output

Consequences on the equipment:

0,1 mm of scale means a 5 % drop of your output – and a metal temperature increase of 90 degrees.

2/ Micro organisms

Consequences :

  • Gaz emission
  • Bacteria development that limits the water circulation and create methane
  • Creation of organic matter
  • Corrosion of some metals
  • Degradation of glycols

3/ Chlorides

The rate of chloride for make up water and heating system water is usually higher than 50 mg/litre. If it meets drinking water  standards ( < 200mg /litre) you can not use it for technical purposes without a suitable protective treatment ( Talari type)

A high chloride rate ( with salts)without any treatment will create holes on the different metals, particularly fast for aluminium and inox.

The speed of degradation of your equipment depends on the quality of the make up water.

The water in cities is poor quality- regarding a technical use in the North West of France. This degradation implies a high increase of chloride in the water.

4/. Oxynegation of the water: oxidation of materials

Consequences :

  • An oxydation and degradation  of radiators, forming flakes and a brownish water ( rust)
  • Risk of obstruction for the floors
  • Bacteria development
  • Corrosion of the expansion tank

5/ Corrosion of between materials

Different metals + some water = 1 battery -> electrosys phenomenom

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