Zinc presence in C95400 Aluminum Bronze Alloy?
Zinc presence in C95400 Aluminum Bronze Alloy?
(OP)
I am investigating the primary cause of corrosion on a large pump impeller and wear ring that is in water treatment plant service. I recovered a sample of the oxidation coating from the ID of the wear ring for ICP analysis. The levels of Al and Cu present in the analysis are inversely proportionate to their precentages within the alloy(C95400). I'm looking at both possible Aluminum leaching and galvanic activity as the primary actions responsible, however the analysis also detected Zn in amounts sufficiently high enough to be a part of the alloy.
All references for the C95400 Al, Cu Alloy that I have do not show any percentage of Zn present. Is it possible that it is present within the Cu? Any additional thoughts or observations would be welcomed. I have uploaded a portion of the ICP data for review.
All references for the C95400 Al, Cu Alloy that I have do not show any percentage of Zn present. Is it possible that it is present within the Cu? Any additional thoughts or observations would be welcomed. I have uploaded a portion of the ICP data for review.





RE: Zinc presence in C95400 Aluminum Bronze Alloy?
Are there any galvanized steel or brass parts in the system?
Given that this is a surface residue then the Zn could have been transported from somewhere else.
What material is the bowl?
How about the shaft and column?
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Plymouth Tube
RE: Zinc presence in C95400 Aluminum Bronze Alloy?
RE: Zinc presence in C95400 Aluminum Bronze Alloy?
RE: Zinc presence in C95400 Aluminum Bronze Alloy?
You can get dealloying (leaching ) of Zn from an Mn Bz.
You get much better water corrosion resistance from nickel aluminum bronze than plain aluminum bronze.