Cathodic protection

Cescor provides complete cathodic protection services, covering: feasibility studies, site surveys, detail design packages, materials procurement, erection supervision, start-up and commissioning, periodical controls and maintenance. Cathodic protection systems - impressed current and galvanic anodes - are supplied using first quality materials procured through a network of qualified manufacturers.

Cathodic protection design

CESCOR has an extensive and specific competence for the design of all cathodic protection applications. Luciano Lazzari, CESCOR’s president, is author with Professor Pietro Pedeferri of an acknowledged reference work Cathodic Protection.
CESCOR has personnel certified in accordance with the European Norm EN 15257.
Cathodic protection application, by galvanic anodes or impressed currents, include:
  • Overland, onshore and subsea pipelines
  • Offshore steel platforms
  • Jetties, Piers and coastal facilities
  • Above ground storage tanks
  • Buried and tumulated tanks
  • Well casing
  • Water boxes
  • Equipment
  • Reinforced concrete structures

Cathodic Protection Inspections - Offshore

imcaCESCOR provides underwater cathodic protection inspections, including proprietary and patented instrumentation to be installed on ROVs or handled by divers, including – probes, electronics, software – and EN 15257 certified personnel for the execution of inspections.

Applicable techniques include:

  • Close-to-remote potential profile (proximity)
  • Potential gradient profile (field gradient)
  • Trailing wire.

These methods, properly combined, allow to assess the protection level of the structure and to detect coating faults.

Typical inspected structures are:

  • Subsea pipelines – open sea and shore approaches
  • Offshore platforms
  • FPSO and SPM.
  • Piers and marine terminals.

The services we provide include the issue of the Inspection Specifications and of the Inspection Report. Where deemed convenient, inspection results are interpreted using FEM modelling.

FEM/BEM Modeling

Modelling by Finite Element Method (FEM) and Boundary Element Method (BEM) is routinely used by CESCOR for Advanced Cathodic Protection Design.

Computer modelling is used to study current and potential distribution on complex structures, to optimize anode positioning in both galvanic anode and impressed current systems, in order to avoid under-protected areas, to anticipate possible risks of hydrogen embrittlement caused by local overprotection and to correctly interpret cathodic protection inspection results or monitoring system data.

Applications include offshore structures, ships, tank bottom, pipelines, equipment.

On-land Pipeline Cathodic Protection Survey

CESCOR performs Cathodic Protection inspection surveys of buried pipelines to verify that correct protection conditions exist all along the line and to detect any coating holidays. Inspections are performed by EN 15257 certified personnel.

Inspection techniques include:
  • Close Interval Potential Survey (CIPS)
  • Transverse Gradient Method (TGM)
  • Direct Current Voltage Gradient (DCVG)
  • Signal Attenuation Coating Survey (SACS)
  • Alternating Current Voltage Gradient (ACVG).
Isolating joints verification, potential data logging, soil resistivity and other additional measurements are also carried out.

Cathodic Protection Retrofitting

A very specific application of Cathodic Protection is the retrofitting of in-service offshore platforms, which strongly differentiates from the case of new structures because of the constraints represented by underwater installation.

CESCOR has executed numerous retrofit projects around he world experiencing different solutions, both with galvanic and anodes and with impressed current. Amongst impressed current systems, the most effective solutions are:

  • Tensioned Anode Strings (TSA)
  • Remote Anode Sleds.

In all cases, the optimal design of the most convenient retrofit system is also based on FEM modeling or BEM modeling, in order to optimize the positioning of the anodes and of the permanent reference electrodes to be used for monitoring the protection conditions.


Cescor Srl - Ingegneria della corrosione e protezione catodica.

INFO

Cescor Srl
Via Maniago 12
20134 MILANO (Italy)
Tel +39 02 26412538
Fax +39 02 26412546
This email address is being protected from spambots. You need JavaScript enabled to view it.

MISSION

The integrity of industrial and civil structures has to be maintained throughout their design life. Corrosion represents the main threat to integrity and durability. Our commitment is to provide our Customers with state-of-the-art engineering expertise in the fields of materials, corrosion and corrosion mitigation. This would contribute to ensure integrity and durability of assets as well as to improve safety, environment preservation and energy saving.

Cescor Srl - Via Maniago 12 - 20134 MILANO (Italy) - P.IVA C.F. IT11151040158 - Tel +39 02 26412538 - Fax +39 02 26412546 - This email address is being protected from spambots. You need JavaScript enabled to view it. | Cookie policy| Privacy policyWeb Agency