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Automated systems of corrosion monitoring (CM) comply with the general concept of construction of TDM systems for
control of hazardous production facilities with the purpose of their
operation in the current technical condition and serve for regulation
of corrosion behavoiur speed and optimization of chemical agents supply
applied for protection of the instrumentation from internal corrosion.
Automated systems of CM based on of Лель-М /A-Line 32D (DDM-M)/
functionally consist of three basic parts: the measuring, computing and
executive ones.
The measuring part, as a rule, incorporates corrosion sensors, pH
sensors, patterns, flowmeters and AE transducers.
The computing part is implemented in the central computer station.
The executive part consists of automatic dosing pumps controllers,
pumps and chemical agent supply jets.
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|  | Functional chart of thorough
corrosion monitoring:
a – for oil-refining
enterprises; b – for oil fields |
Modification of the automated CM systems depends on specific features
of the object and the monitoring goals.
Structure chart of thorough corrosion monitoring of
ADU facility at oil refining enterprises
- Corrosion sensors are primary transducers intended
for measurement of corrosion rate through the method of electric
resistance (ER) or the method of linear polarization resistance (LPR);
- Transmitters are secondary converters connected to
ER or LPR corrosion sensors, serve for measurement of corrosion sensor
readings and their further transfer to standard interfaces in the
analog or digital form;
- pH measurement complexes are devices intended for
technological process inspection and finding solutions to the problems
of measurement and command of the executive instrumentation;
- pH sensors are devices measuring pH level in
aqueous phase (including in corrosive nature solutions);
- Dosing pump automatic controllers (DPAC) is an
electronic control unit of the dosing pump allowing control of
corrosion protection agents supply;
- Dosing pumps are electric pumps providing corrosion
protection agents supply;
- Flowmeters are devices intended for measurement of
the corrosion protection agents consumption and allowing to supervise
the result of DPAC control action.
FEATURES
- Opportunity of forecasting of еру current corrosion condition of the
object under control.
- Measurement of the corrosion rate and on-line display of the
received results.
- Noninuform corrosion data acquisition.
- Characterization of current corrosion processes and their
statistical evaluations.
- Full-function command of DPAC operation modes and the dose level of
chemical agents.
- Integration with control stations for increase in efficiency of
reaction in critical situations.
- Usability.
- High reliability and long-term service.
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