In
a typical Socrates-B consultation, you will be specifying data
relevant to:
- Application
and mechanical requirements
- Environmental
data to characterize general corrosion, stress corrosion cracking
and localized corrosion for each of the non-production environments,
(completion fluids, stimulation acids or injected waters).
As the user
specifies environmental data, the program calculates and displays
two synergistic corrosion and cracking characterization parameters:
Environmental
severity, a measure of general corrosivity of the operating
system, is computed for completion fluids and injected waters
as a function of applicable parameters, such as:
- Acid gases
H2S and CO2
- HCO3
- Chlorides
- Min. and
Max. Temperature
- Aeration
- Chlorination
- Inhibition
efficiency
Socrates-B
also determines the system pH based on acid gas partial pressures,
buffering and temperature where it is relevant. In the case of
stimulation acids, the system calculates a required pitting index
as the measure of environmental severity.
Required
pitting index (RPI) is calculated based on environmental severity
and maximum operating temperature for completion fluids and injected
waters. The only materials displayed in the results
window are those that have a pitting index higher than the computed
RPI. Pitting Index for materials in Socrates-B is computed
using the following relationship:
Once valid
data is supplied for each kind of environment, the system will
display materials that meet the specifications. Selected materials
within a specific class can be displayed by double clicking on
any folder, shown below. To view the information for a specific
material listed, double click on the name of the alloy.
