General Corrosion:

This theory describes the general corrosion procedures of iron and carbon steel (not stainless steels) within aqueous environments.  Of particular interest are the configuration of the oxide film and the effects of system variables on the corrosion process.

 LIST the two conditions which contribute to general corrosion.

 DESCRIBE how the rate of corrosion occurring in the plant is affected through the following:

a.         Temperature           

b.         Water velocity

c.         Oxygen

d.         pH                             

e.         Condition and composition of the metal surface

f.          Dissolved solids

 LIST the three products which are formed from the general corrosion of iron.

 IDENTIFY the action taken for initial fill of a reactor system to limit general corrosion.

 STATE the four methods used to chemically control general plant corrosion.

 LIST the six water chemistry conditions which limit corrosion of aluminum.