Remarks:
For DESCALING OF PIPELINES of Cooling Systems, use RXSOL DESCALEX POWDER
Recommended concentration: 3-8% by weight, depending on scale severity
|
Scale Condition |
Concentration |
|
Light scale (maintenance clean) |
2-3% |
|
Moderate scale |
4-5% |
|
Heavy scale (visible thick deposits) |
6-8% |
For most cooling systems with routine mineral scale (calcium carbonate, etc.), 5% is a good general-purpose starting point - that's roughly 100 kg for 2,000 L.
A few important operating notes,:
-
Circulation time: Typically 2-3 hours of circulation, checking pH periodically. Stop when pH stabilizes (acid is spent/scale dissolved) or after visual/lab confirmation.
-
Monitor progress: Check pH and iron/copper ion concentration in solution periodically (test strips or lab titration) rather than fixing a blind circulation time - stop as soon as scale is gone rather than over-circulating.
-
Following the acid clean with a neutralization/passivation step - commonly a mild alkaline flush (e.g., sodium carbonate/soda ash, ~0.5–1%) to raise pH to neutral and form a protective passive layer on the iron/steel before refilling with treated water.
-
Rinse thoroughly after neutralization before returning to normal operation.
