Corrosion and Materials in Hydrocarbon Production by Kermani Bijan;Harrop Donald; & Don Harrop

Author:Kermani, Bijan;Harrop, Donald; & Don Harrop [Kermani, Bijan & Harrop, Don]
Language: eng
Format: epub
ISBN: 9781119515739
Publisher: John Wiley & Sons, Inc.
Published: 2019-04-08T00:00:00+00:00

Corrosion barrier monitoring parameters form an important part of an overall corrosion management programme, as discussed in Chapter 18.

10.4 Collection and Analysis of Real‐Time Monitoring Data

Following data acquisition by corrosion monitoring and inspection, it is paramount that the data are stored, analysed, and interpreted. The volume of acquired data should be anticipated so that the corrosion trending programme can be optimised accordingly, taking into account this otherwise potentially laborious and time‐consuming task. The data trending should be performed and the results presented preferably in a graphical format to ease the corrosion management programme (see Chapter 18).

Real‐time transmission of corrosion data from electrically based monitoring (e.g. ER, LPR, oxygen probes) has been available for many years although it requires the costly installation of hard‐wiring from the probe to a control centre. In recent years there have been significant advances in the availability and reliability of wireless communications. This has enabled corrosion monitoring data to be transmitted relatively inexpensively from remote locations. Some manufacturers of corrosion monitoring equipment now provide wireless systems that (relatively) easily integrate into existing control systems to allow real‐time display of corrosion rate data. The software is often enhanced with features that send alert emails to the appropriate personnel when corrosion rates exceed pre‐defined limits.

Many companies provide software that can take multiple data inputs and correlate them with the corrosion monitoring data. As an example, taking temperature, pressure, and flow rate data from a pipeline to estimate an unmitigated corrosion rate. Similarly, corrosion inhibitor injection rate data which determines the inhibitor concentration present can be collected to enable an on‐going estimate of the inhibited corrosion rate as determined from laboratory or field corrosion test data compared to the corrosion rate from probes. These data are then presented in a corrosion dashboard which can be seen at any location around the world. Figure 10.4 shows a typical dashboard that displays real‐time fluid flow rates, velocities, sand rates, and estimated corrosion rates.

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