Quote:
Originally posted by Since87
Speaking of that...
Do you know what the relative durability of silver and copper would be?
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Well, according to the Wolverine handbook on cooling, copper is able to withstand 6fps (~2m/s) velocity without
any form of long-term erosion. The Wolverine book is talking about ultra-conservative long-life scenarios.
An Eheim 1048 plus heater-core will give about a 2.5m/s jet velocity.
As to the scale of the erosion, my personal belief is that it is extremely low even at 10m/s velocities. So long as there is no gritty particulate matter being thrust against the metal I figure it should be pretty safe.
Hard to put an exact figure on it, but have been running this silver block with ~5.5m/s jet velocities with the Iwaki MD-30RZ for close 3 months now. About every month I pull it apart and inspect it. Last time I checked the fine-level machining marks left at the base of the cups, which numbers in the very small number of microns in scale, were still plainly visible. If there's any erosion happening, it certainly doesn't look like it'll be an issue within 10 years at the least, even with this fairly powerful pump and soft silver.