BEASY Software and Services

 

ABSTRACT

Marine structures are frequently monitored or surveyed as part of an ongoing integrity management program to obtain data on corrosion potentials, anode consumption and in some cases field gradients. One objective is to determine how effective the CP system is at providing protection to the structure and another is to verify that sacrificial anodes are being consumed at a rate consistent with design assumptions. However it is not economic or in many cases even feasible to measure potentials on a complete structure or to collect data from all anodes, so the CP engineer is required to infer the condition of the overall structure from the available data.

In particular for structures with complex geometry, the accuracy of data collected may not be reliable, as for example potential readings obtained with a measurement probe can be affected by nearby metal surfaces, leading to significant error in the data collected particularly for field gradients. Similarly access problems can result in error if the probe cannot be oriented or placed on the structure or anode in the required location. These issues require the CP engineer to use his judgment to determine which data to use and which to discard.

Computer modeling has been used in the design of CP systems firstly to optimize the design, and secondly to provide assurance to the operator that requirements for anode life are met, and that the system will sustain the potentials required to protect the structure. In such a case the structure geometry and the anode design are supplied as data to the model and the model predicts the potentials and the anode consumption rates over the life of the structure.

However another application of modeling is to use it to convert information we can measure into the information we want to know. In particular modeling can be used to expand limited survey data into a prediction of potentials on all structural surfaces, and to provide data on the performance of all anodes.

A case study is presented in which computer modeling is used to evaluate data from a single survey, then to enhance the data to provide a view of potentials over the complete structure and to provide a view of consumption of all anodes.

Keywords: CP, Cathodic Protection, Modeling, CP Survey

To get the full publication please Open the Publication Below

Open Here

Here are a series of case studies for the types of projects BEASY have helped with worldwide.

To download BEASY case studies we require data from you, please fill in the form provided and the material will become available to download


Please note that by submitting these details you are giving us permission to contact you further to validate that the material fully addressed your requirements.
We will not pass your details on to any third party organisations.

Request Information

To request more information on:

  • BEASY software products
  • Consultancy & Engineering
  • BEASY support services
  • Training
  • R&D and Customisation

See our Request Information Form

Follow Us!

Newsletter Sign-up

Areas of Interest

Please note that by submitting this form you are giving us permission to store the details you have entered above in our database system.  We will use this data to add you to our mailing list to receive the monthly BEASY e-newsletters you have selected. You can remove yourself from the e-newsletter mailing list at anytime by choosing the opt-out feature on the e-newsletter. We may also send you literature about BEASY via postal mailings and any other BEASY information and announcements which we think you will find of interest. We will not pass your details on to any 3rd party organisations.

To download BEASY documents we require data from you, please fill in the form provided and the material will become available to download