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| Definition |
Chemical process
:
Chemical process is the
deterioration of a substance (usually metal) or its properties
because of a reaction with its environment. This is a broad
definition, and it recognizes that materials other than steel,
such as concrete, wood and plastics deteriorate or corrode.
Physical process
:
Physical process is due
to abrasion, stress, partial pressure of dissolved gas (sour-H2S,
sweet-CO2), velocity effects.
Electrochemical
reaction :
Electrochemical reaction
is a chemical reaction involving the transfer of electrons.
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