BEASY Corrosion Newsletter

 May 2012

NACE Corrosion 2012

BEASY participated in a very busy NACE Corrosion Conference in Salt Lake City recently, and was active in both the conference program and exhibition hall, highlighting its corrosion modeling services and software. It was good to see many friends and interested corrosion engineers visiting us at our booth.

A number of projects carried out by the BEASY engineering services team featured in the Technical Program, and are described below:

 

* Using modeling to interpret and expand CP survey data
 

* Jacket SACP system design and optimization using simulation
 

* General consideration about current distribution and potential attenuation based on storage tank bottom modeling study

 

Further information on these studies is available to download as follows:

Using modeling to interpret and expand CP survey data

Robert A Adey, Cristina Peratta, and John M W Baynham, CM BEASY Ltd

 

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

Survey data displayed on the 3D model
Survey data displayed on a 3D model of the structure

some cases field gradients.

 

In this paper new technology is described and a case study presented in which computer modeling is used to evaluate data from a survey and then enhance the data to provide a view of the potentials over the whole structure and data on the consumption of the anodes. This adds significant value to the survey data by providing information at locations on the structure not surveyed as well as anodes not inspected.

 

For a PDF copy of this case study, please click here

 

Jacket SACP system design and optimization using simulation

Jacket SACP design & optimisation

Initial design showing
uneven protection

John M W Baynham, Tim Froome, Robert A Adey,
CM BEASY Ltd

 

The objective of the paper was to explore simulation techniques, and show how they can be combined to provide a practical toolset for SACP system design optimization. This provides the corrosion engineer with new and significantly more powerful design capabilities which are based on real physics rather than standardized design rules. The use of these tools both reduces the risk of the CP design not meeting its required life and ensures an economical design.

 

The paper illustrates performance of the design and optimization processes using a jacket structure for which long-term "sigmoidal" polarization curves provide an appropriate representation of calcareous deposits.

 

For a PDF copy of this case study, please click here

General consideration about current distribution and potential attenuation based on storage tank bottom modeling study

Jean Vittonato, TOTAL E&P CONGO, John M W Baynham, CM BEASY Ltd


The efficiency of cathodic protection is driven by various environmental parameters, the main ones being: the geometry of the protected structure, the electrolyte resistivity, and of course the steel polarization curve. The aim of this study was to assess the influence of those parameters on the current distribution and on the potential attenuation on the base of a storage tank.

In particular, an investigation was made into the apparently contradictory influences of the resistivity. For this investigation, two configurations of CP system applied to storage tanks bottom were studied by 3D modeling. The first is a tank bottom for which a membrane is installed a few tens of cm underneath, with an anodic grid system located in the confined space. The second is the usual design where no membrane is installed below the tank and where anodes are located around the periphery of the tank.

For a PDF copy of this case study, please click here

Can We Help?

 

If you have a project which you think could benefit from modeling or would just like to learn more, please contact [email protected] 

 

Don't forget BEASY provides a complete service ranging from the completion of the whole modeling project through to the provision of modeling software technology.

 

For further information, please visit our website www.beasy.com