Water Quality For 40 Bar Compressor Air Cooling Loop

Question

Hi everybody,
We are using brackish raw water for our factory utility cooling media. 
chemical characteristic of water is:
pH 7.5 -8.5 TDS  150 CALCIUM  15 SODIUM    10 MAGNESIUM 5 CHLORIN 0.5-1 PPM
Since the last two year we are using this water, now we see some rust and debris in the pipeline.
Is this water okay for pipeline or not?
Thank you and regards.

Waymon Hofheins · Answer

Incomplete analysis and information.  This doesn't make sense.  Hire a water treatment company to handle the problem:  Someone who knows water treatment chemistry.

Waymon Hofheins · Answer

Incomplete analysis and information.  This doesn't make sense.  Hire a water treatment company to handle the problem:  Someone who knows water treatment chemistry.

Ramlan Ramli · Answer

Carbonate is essential natural corrosion inhibitor for carbon steel in contact with water. Balance between carbonate and calcium will enhance the effectiveness of this inhibition. I suggest from brief data that you have provided, the natural inhibition effect is not sufficient in your system thus will need chemical supplement to reduce corrosion potential. 
 
The most straight forward way is by adjusting alkalinity and calcium hardness such that water quality to fall into non corrosive zone as per LSI calculation. However, when water temperature is exceeding 35 Celsius this approach will be very challenging since scale and deposition risk start to present.

Ramlan Ramli · Answer

Carbonate is essential natural corrosion inhibitor for carbon steel in contact with water. Balance between carbonate and calcium will enhance the effectiveness of this inhibition. I suggest from brief data that you have provided, the natural inhibition effect is not sufficient in your system thus will need chemical supplement to reduce corrosion potential. 
 
The most straight forward way is by adjusting alkalinity and calcium hardness such that water quality to fall into non corrosive zone as per LSI calculation. However, when water temperature is exceeding 35 Celsius this approach will be very challenging since scale and deposition risk start to present.

Dashrath Bhatter · Answer

Hi Navas KT
Please recheck water Analysis report. 150 mg/l TDS is too low for brackish water. Get complete ionic balance for the water. Reporting results in standard format as equivalent CaCO3, will help in understanding the nature of of water (Corrossive or Scalforming )
D. Bhatter

Water Quality For 40 Bar Compressor Air Cooling Loop

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