We control corrosion on pipelines, tanks, docks and vessels, buried or submerged.
We design and build galvanic-anode and impressed-current systems, and keep them in service with periodic potential surveys.
We manufacture part of what we install: shunts, Cu/CuSO4 reference electrodes and magnesium anodes made with alloys developed by our own staff.
What we do
Galvanic anode systems: magnesium, aluminum and zinc
Impressed-current systems with Ti-MMO and Fe-Si-Cr anodes
Soil resistivity surveys for system design
Coating quality testing and DCVG surveys
Maintenance and potential monitoring
Supply of in-house shunts, electrodes and anodes
Two systems, one goal
Galvanic anodes. Magnesium, aluminum or zinc alloys that oxidize more readily than the protected metal. The potential difference makes the anode corrode instead of the structure.
Impressed current. A bed of Ti-MMO or Fe-Si-Cr anodes is connected to the structure through an external power source that drains current until protection potentials are reached.
DCVG and coating quality. We locate coating defects by direct-current voltage gradient. Coating quality is estimated from its effective resistance, which depends on soil resistivity.
| Soil resistivity (ohm-cm) | Minimum coating quality criterion (ohm-ft²) |
|---|---|
| 100 – 1,000 | 300,000 |
| 1,001 – 5,000 | 1,500,000 |
| 5,001 – 15,000 | 3,000,000 |
| > 15,000 | 4,500,000 |
Projects in this discipline
Trans-Caribbean 26" gas pipeline
Design and construction of 11 cathodic protection systems with MMO anodes: 7 in Venezuela and 4 in Colombia.
Cathodic protection
Lake Maracaibo gas pipelines
Design and construction of 5 cathodic protection systems on 14" and 20" gas pipelines crossing the lake.
Cathodic protection
Ule–Amuay corridor
Design and construction of 7 cathodic protection systems on 12" and 16" gas pipelines.
Cathodic protection
200,000-barrel tank
Cathodic protection system design for the tank.
Cathodic protection
66,000-barrel tank
Design and construction of the tank cathodic protection system.
Cathodic protection75,000-barrel tanks
Cathodic protection design for fuel storage tanks.
Cathodic protectionGas spheres
Cathodic protection design for gas storage spheres.
Cathodic protectionTank 20TK001B
Upgrades to the tank cathodic protection system at a tank farm.
Cathodic protection
Grounding & lightning protection
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