Thank you for your answers. ...
Published by Asanka Wimalarathne, Area Manager at Wasser Kraft Tech (SUEZ - Water Technologies & Solutions Channel Partner)
Thank you for your answers.
Recently we have seen, some corrosion in the feed water pump strainer (after) deaerator. And some kind of flash corrosion inside the pipeline.
We just assumed, this was corrosion products which carry over from the deaerator. Can it be happen?
I have attached 2 photos of subjected stainer and the pipeline.
3 Comments
Check yr Oxygen Scavenger dosages in feed water.
Published by MUHAMMAD ILYAS KHAN, DGM, Manager (Purification), Director New Ventures at (BST). at SSGC, PPL & BST
Another one subject to the problem is the operating time of the boiler. If it is not operating 24 h/day the Feedwater temperature will drop, oxygen will dilluted and oxygen corrosion will take place, no matter if oxygen scavenger is used. In such a case it should be used a strong passivator like DEHA in order to diminish the iron corrosion during stand-by time.
Published by Apostolos Kavadias, IDRO - APOSTOLOS KAVADIAS
Yes. It is corrosion products transferred from the Feedwater There are two possibilities for their source. The first one is to be corrosion of Steam /Condensate pipeline, and the second to be corrosion of the Deaerator and/or Feedwater tank.
You should have historical data of water analyzes (including iron and oxygen scavenger residual) from these two points in order to find the reason of the problem, which you could anticipate.
Published by Apostolos Kavadias, IDRO - APOSTOLOS KAVADIAS