Corrosion resistance of cast iron and ductile iron valves.
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For the AMOT three-way temperature control valve with DN125 size, the available materials are cast iron, ductile iron, and bronze (all of which have an anti-corrosion coating applied to their surface). Since the lead time for bronze is too long, cast iron or ductile iron is preferred. The medium in question is deionized water; I would like to know what the corrosion situation is like in these cases Estimate how long it will take for corrosion to occur and affect the pump body.
Additional information on operating conditions: The pressure of the demineralized water in the petrochemical plant is 0.55 MPa, and the temperature is 50 degrees. If ductile iron is used instead of cast steel, will this have any impact under these operating conditions? Are there any requirements stating that ball iron cannot be used in petrochemical plants?
Ductile iron meets the requirements; it’s best to have a copper sealing surface