Some
investigation has shown that zinc corrodes more easily than lead
(lead being a medium anodic and zinc a high anodic metal). Bronze,
Copper and Brass are among the least easily corroded materials other
than precious metals. Lead comes immediately after copper in the
ease of corrosion.
The
implication is that more easily corroded materials need more
aggressive/abrasive cleaning before soldering and that their
longevity in the weather will be shorter than the less easily
corroded metals.
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