Corrosion
DOE-HDBK-1015/1-93
GENERAL CORROSION
Rev. 0
CH-02
Page 11
GENERAL CORROSION
This chapter describes the general corrosion processes of iron and carbon
steel (not stainless steels) in aqueous environments. Of particular interest
is the formation of the oxide film and the effects of system variables on the
corrosion process.
EO 1.7
LIST the two conditions that contribute to general
corrosion.
EO 1.8
DESCRIBE how the rate of corrosion occurring in the
plant is effected by the following:
a.
Temperature
b.
Water velocity
c.
Oxygen
d.
pH
e.
Condition and composition of the metal surface
f.
Dissolved solids
EO 1.9
LIST the three products that are formed from the
general corrosion of iron.
EO 1.10
IDENTIFY the action taken for initial fill of a reactor
system to limit general corrosion.
EO 1.11
STATE the four methods used to chemically control
general plant corrosion.
EO 1.12
LIST the six water chemistry conditions that limit
corrosion of aluminum.
Conditions Contributing to General Corrosion
General corrosion is the process whereby the surface of a metal undergoes a slow, relatively
uniform, removal of material. The two conditions typically required for a metal to undergo
general corrosion are: 1) metal and water in the same environment, and 2) a chemical reaction
between the metal and water that forms an oxide.
