What effect does bending, stress, or machining have on the tendency of iron to corrode?

Answer 1

It depends on the type of iron: But basically, bending, stress cause microcracks allowing moisture and oxygen into the metal.

Answer 2

i am talking about nails..nails that have iron in them

Answer 3

Nails are mainly steel, a mixture of iron and other metals. Stress causes microcracks and fatigue cracks.