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Old 11-27-2016, 02:28 PM   #10
DavidM
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City: Litchfield, Ct
Join Date: Aug 2012
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If Rydlyme or similar can dissolve a zinc, how can it be safe for typical metals on engines? And I can assure you that it will dissolve aluminum.

So only use it on raw water systems. These are made with bronze and cupronickel alloys which can withstand the corrosion ok. But only raw water systems. If you take an after cooler which has an aluminum housing for the air side and soak it in a vat of acid without removing the inner core and just soaking that, the housing will soon be gone.

Another story from my past: Years ago we tried cleaning fabricated stainless steel pipe by soaking in nitric acid which is fine for stainless steel. But the carbon steel sliding flanges were gone when we took it out of the nitric acid bath.

David
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