Yes, very much. People who live near the ocean
The reason is that the process of
rusting involves electrons moving around, and
electrons move more easily in salt-water than they
do in clean water.A simple test of this is to see
how easily current flows in clean water it does
not), and then add salt to the water (when current
does flow easily).
Water is the enabler of fast oxidation of iron so
freshwater will also cause rust. However, salt
water is a very good conductor (lots of
dissociated ions) and so there are a number of
electrolysis reactions that tremendously
accelerate corrosion in salt water.
example if you have iron in contact with salt
water and also in contact with another metal such
as aluminum (also in contact with the water) you
effectively get a battery which drives very fast
This effect can be
reversed by using a metal (like zinc) which causes
the current to be reversed and in effect the zinc
corrodes rapidly, protecting the iron. This is the
principle of a 'Cal-rod' which is used to slow the
rusting of hot water tanks (almost all of which
are cast iron).
There is a lot of information
on corrosion on the web...
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