The field of corrosion measurement, control, and prevention covers
a very broad spectrum of technical activities. Within the sphere of
corrosion control and prevention, there are technical options such
as cathodic and anodic protection, materials selection, chemical
dosing and the application of internal and external coatings.
Corrosion measurement employs a variety of techniques to determine
how corrosive the environment is and at what rate metal loss is
being experienced. Corrosion measurement is the quantitative method
by which the effectiveness of corrosion control and prevention
techniques can be evaluated and provides the feedback to enable
corrosion control and prevention methods to be optimized.
Corrosion monitoring is the practice of measuring the corrosivity
of process stream conditions by the use of "probes" which are
inserted into the process stream and which are continuously exposed
to the process stream condition. Corrosion monitoring "probes" can
be mechanical, electrical, or electrochemical devices. Corrosion
monitoring techniques alone provide direct and online measurement
of metal loss/corrosion rate in industrial process systems.
Some corrosion measurement techniques can be used on-line. In a
well controlled and coordinated program, data from each source will
be used to draw meaningful conclusions about the operational
corrosion rates with the process system and how these are most