The most widely
accepted application of commercially pure nickel
is in the handling of highly concentrated caustic
solutions. Nickel has lower corrosion rates in hot
caustic solutions than alloyed nickel due to the
preferential dissolution of elements such as chromium
and molybdenum. Nickel can also tolerate
cold reducing acids well because of the slow discharge
of hydrogen on its surface. Hot reducing
acids and oxidizing acids corrode pure nickel rapidly