Quote:
Originally Posted by Ronbo
I know from my boat owning days that these are called "noble" metals.
Since one of my larger customers is a local utility, I'll see if I can get some input from their engineers in the water dept. They have to deal with all sorts of problems like hydrogen sulfide gas in our ground water here. (rotten egg smell) Not to mention clorine and calcium. Ph levels are a big concern for one thing.
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Noble metals are less active to corrosion (Gold being at the high end of the Nobel scale) Base metals are "active" in corrosion (aluminium, lead,
zinc), Key is to sacrifice metal via the electron flow through a less nobel metal than you are trying to protect. Problem is that
zinc although less nobel than aluminium, it's not alot less.