IEC has in its portfolio the Iron-Silicon-Chromium Anodes that are extremely important items for the composition of the cathodic protection system. The anodes are manufactured by Anotec Industries Ltd, a Canadian company that we represent exclusively in Brazil.
Iron-Silicon-Chromium Anodes for impressed current cathodic protection are used to provide electrical current through soil and natural waters to protect structures by mitigating corrosion. During the process, the anodes are slowly consumed.
The anodes used in the impressed current system differ fundamentally from the galvanic anodes because they are inert, presenting a very low consumption and having a longer life.
The main features of these anodes are:
- Permissible current density
The permissible current density is a characteristic of the type of material used in manufacturing. The utilization of a current density above the maximum recommended can cause a sharp and irregular utilization of the anode. In certain cases, it may give rise to the appearance of insulating products on the surface.
Each type of anode has a known consumption rate when operating within the maximum current density limit. The consumption rate of a certain type of anode needs to be considered for the calculation of its life. In general, the ground bed is designed for a minimum life span of 15 to 20 years.
The electrical contact resistance between the anode and the electrolyte is a function of the anode dimensions and the electrolyte resistivity. Therefore, once the installation location is defined, the resistance of each anode will depend on its dimensions. Length or diameter increase in the anode will result in a reduction of the strength, however, the influence of the length is much greater than the diameter. The total resistance of the anode bed, in applications in soils from medium to high resistivity, is, in general, the factor that defines the number of anodes to be used.
The iron / silicon / chromium anodes (Fe-Si-Cr) are manufactured by Anotec Indutries Ltd. in circular bars, by casting, with a silicon content of 16% and a chromium content of not less than 4%. And are recommended for soils, sea water, seabed and freshwater.
IEC has in its portfolio two types of reference electrodes. They are:
- Portable Electrodes: manufactured by Tinker & Rasor;
- Portable and Permanent Electrodes: manufactured by Borin.
The reference electrodes are instruments for inspection and maintenance of the cathodic protection system and are indispensable equipment in the cathodic protection technology. It is by making use of these materials that the potential of a structure is measured relative to the electrolyte in order to assess the condition of the metal material, to check if there is corrosion, whether the structure is protected or whether there is influence of current interference.
The electrodes and their types:
- Copper / copper sulfate electrode: used mainly to measure potentials in soil, avoiding its usage in liquids;
- Silver / silver chloride electrode: specific for salt water;
- Zinc / zinc sulfate electrode: measures a potential in salt water as well as in soil. For use in soil, zinc should be wrapped with conductive filler of gypsum and bentonite.
Each reference electrode has a different value to its own potential. That is why a given potential, measured by different reference electrodes, presents different values.
Main commercially available electrodes:
- Manufactured by our partner Tinker & Rasor:
Portable models of copper / copper sulfate: 6B, 8B, 6A, 2A, 3A
Portable Silver / Silver Chloride Model: SC-4
- Manufactured by our partner Borin:
Permanent Copper / Copper Sulfate Model: Stelth 2 - SRE-007-CUY
Silver / Silver Chloride Permanent Model: Stelth 2 – SRE-008-SUB
Permanent model zinc / zinc sulfate: Stelth 2 – SRE-009-ZUR
Portable models are available upon inquiry.
IEC has in its portfolio calcined petroleum coke breeze, an essential material in the composition of the Cathodic Protection System. Coke breeze is manufactured by the American company called Loresco, which has high performance, is used in cathodic protection anode beds and to improve electrical grounding, and presents extremely uniform granulometry which confers very low electrical resistance and high density, which dispenses its compaction. Much used in deep beds that are excellent alternatives to the surface beds, because they avoid the need for land expropriation, facilitate the distribution of cathodic protection current in the structures and are less subject to damages by third parties.
IEC has in its portfolio the electrical insulation joints, monolithic type. Commercialized under standard or special condition. These items are manufactured by Nuova Giungas Srl, belonging to the giant Italian group called Valvitalia.
Electrical insulation joints monolithic type are used to electrically isolate the pipeline from structures which do not wish to apply cathodic protection, such as groundings, foundations and supports. With this, you can:
- Electrically isolate a protected structure from an unprotected one, thus avoiding that the current reaches the structure that does not wish to pass electric current.
- Divide a structure to protect in isolated stretches and, therefore, treat each stretch independently of the other. In certain circumstances, such a procedure turns the protection easy.
They are very advantageous comparing to conventional joints, as they are much more resistant to faults and leaks. They are manufactured and assembled under controlled processes that offer monolithic joints greater capacity to support high pressures and aggressive fluid conditions, and DO NOT REQUIRE MAINTENANCE.
In order to guarantee the functionality of the monolithic insulating joints, it is important that the user has a strict control in the specification, having the information that directly impact on the constructive design of the joint and are fundamental for its guarantee. Therefore, it is necessary to know the Design Pressure, Nominal Pipe Diameter, Nature of Transported Fluid, Design Temperature, and Pipe Wall Thickness; in addition to confirm that the part sealing member is formed of a single piece of rectangular section and that its forming elastomer conforms to NORSOK M-710 or ISO 23936 and does not allow the usage of O-Rings Sealing Seals Type.
If you want cathodic protection system functional integrity, duct integrity and operational safety: properly specify your monolithic electric insulation joint.
IEC has a stock of standard units that guarantees a fast response to their emergency demands and the comfort of purchasing parts with total quality control. Parts of various diameters and pressure classes ANSI 150 and ANSI 600 are kept under these conditions. Other pressure classes are available upon request for manufacturing.
IEC has in its portfolio insulation joint protection devices manufactured by Dairyland Electrical Industries, DEI.
The pipeline joints may be subject to overvoltage faults due to lightning and, in some applications, AC voltage. When a pipeline is near from electric transmission line, it may be subject to significant AC voltage if a fault occurs. Overvoltage protection against lightning and AC failure conditions occurs while maintaining the cathodic protection of the pipeline insulation joints. This is possible using classified products through proper choice of the device and the location of the device installation. Adjacent pipelines and installations should be examined to establish a complete protection scheme.
The protectors also referred to as decouplers, drain alternating current and block direct current in the main applications:
- Protection of Insulating Joints: Installed in parallel to the joints, the decouplers allow the passage of AC currents coming from lightning strikes or high voltage lines in case of short circuits or in continuous regime;
- Mitigation of AC voltages from high voltage lines: The best way to reduce these voltages is to ground the pipeline, but this would make cathodic protection unfeasible. The decouplers allow to connect the pipeline to the ground without damaging the cathodic protection as they drain the AC currents and block the DC.
- Grounding of valves and stations connected to pipelines;
- Grounding of tanks with cathodic protection;
- Temporary landings of vessels in ports;
- Among others.
IEC has in its portfolio a wide line of decouplers that can be used for buried pipelines.
These decouplers are manufactured by Dairyland, an American company that we exclusively represent in Brazil.
The decouplers are widely used to solve problems of influence of AC transmission lines in buried pipes, which is also a service provided with excellence by IEC to its customers.
REMOTE MONITORING RECTIFIER
Operating cost reduction
IEC has in its portfolio equipment for remote monitoring of rectifiers and drainage and monitoring of Test Points in cathodic protection systems. In addition to perform the service associated with these demands.
The units are developed and manufactured by the company we represent, Vectora Technology.
Rectifier & Drain Remote Monitoring Equipment: VT460
Advanced tool for remote monitoring of rectifiers and drains of cathodic protection systems. Based on the main monitoring requirements, the VT460 performs readings at preconfigured intervals and makes them available via a GPRS modem to a server accessed through a WEB interface.
The VT460 monitors the tube-ground voltage, current and output voltage of the rectifier, and monitors alarm conditions, such as open panel door, blown fuse, power supply, etc.
IEC has in its portfolio thermoelectric power generators (TEGs). These generators are manufactured by Gentherm Global Power Technologies (GPT), a company that has extensive experience with 'TEGs'.
Gentherm is the world's largest manufacturer of TEGs.
HOW DOES IT WORK?
A thermoelectric generator has no moving parts but is designed to convert directly into electricity. The heat moves from a gas burner through a thermoelectric module, it causes an electrical current to flow.
GPT's individual generators range in output size from 15 to 550 watts, and are ideal for remote power applications requiring power up to 5,000 watts.
Gentherm are designed for a minimum 20 year service life. Gentherm solutions are known for their ability to operate reliably in any environment. There are 25,000+ Gentherm products installed in 55 countries.