Corrosion inhibitor needed for boiler system - question

[DAta21117]

Bionibal water treatment has been used since this boiler was installed before 2011. Unfortunately, iron has been showing up in the system, and the Honeywell three-way valve gums up every few years, and then the actuator fails.

The boiler is aluminum and has steel fittings. The piping is copper with small steel fittings in places. So far, no leaks.

Is there a water treatment which would be compatible with the three metals? (Aluminum, copper, and steel)

 

[MJCronin]

Suggest that you post in the "Boiler and Pressure Vessel" forum ....

MJCronin
Sr. Process Engineer

 

[BurrowX]

Yes, there is a water treatment solution for this but it won't be a straight forward answer. If your valves are gumming up and you're seeing iron present in the water they may be from two unrelated things.
Have you been doing corrosion coupons on each metal regularly to determine which pipe/valve or fitting is rusting?
Has the iron just started showing up in the system? or has it always been there since 2011?
Are you using the bionibal for pH adjustment? If so what is your target pH?
Happy to help, but there is a lot more information needed to know if I am helping you solve the right problem.

Laron B.
BurrowX
Sr. Chemical Engineer