EMCS Industries Ltd provides a turn-key solution for all Anti Corrosion and Anti Fouling requirements, this page deals with Aluminium, Magnesium and Zinc sacrificial anodes for all applications requiring corrosion protection. We can protect your Hull, Stand Off Tanks, Ballast Water applications, Harbours and Ferry Terminals, and many more applications. Sacrificial Anodes are highly active metals that are used to prevent a less active material surface from corroding. Sacrificial Anodes are created from a metal alloy with a more negative electrochemical potential than the other metal it will be used to protect. The sacrificial anode will be consumed in place of the metal it is protecting, which is why it is referred to as a sacrificial anode.
The materials used for sacrificial anodes are either relatively pure active metals, such as zinc or magnesium, or are magnesium or aluminum alloys that have been specifically developed for use as sacrificial anodes. In applications where the anodes are buried, a special backfill material surrounds the anode in order to insure that the anode will produce the desired output.
Since the sacrificial anode works by introducing another metal surface with a more negative electronegative and much more anodic surface. The current will flow from the newly introduced anode and the protected metal becomes cathodic creating a galvanic cell. The oxidation reactions are transferred from the metal surface to the galvanic anode and will be sacrificed in favor of the protected metal structure.
Galvanic Anode Cathodic Protection (GACP)
Well known to have ‘Ultra Reliability’ an increasing requirement for the offshore Oil & Gas sector. EMCS have DNV ‘Type Approval’ certiﬁcation for production of Galvanic Sacriﬁcial Anodes for prevention of Microbiological Induced Corrosion (MIC) or Accelerated Low Water Corrosion (ALWC). A galvanic anode is the main component of a galvanic cathodic protection (CP) system used to protect buried or submerged metal structures from corrosion. They are made from a metal alloy with a more “active” voltage (more negative reduction potential / more positive electrochemical potential) than the metal of the structure. The difference in potential between the two metals means that the galvanic anode corrodes, so that the anode material is consumed in preference to the structure. The loss (or sacrifice) of the anode material gives rise to the alternative name of sacrificial anode.
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Cathodic Protection (CP) Maintenance/Service Contracts for Port Assets – we offer a range of CP services for both installation and maintenance of Port Assets performed by our NACE qualiﬁed CP Engineers in accordance with BS EN 15257 – Competence Levels and Certiﬁcation of Cathodic Protection Personnel and include:
CP Maintenance – Vessel supply and chartering, Replacement of Anodes and ICCP Reference Electrodes using Dive Operations, Maintenances of current sources for ICCP systems, Periodic Inspection of GACP and ICCP systems, Fault Finding Diagnosis and evaluation of problems with existing CP systems. Our Engineers are covered by the appropriate Insurance for the civil industry.
CP Survey and Commissioning – Voltage Potential Surveys and Commissioning of CP Systems installed onto structures, Structure Integrity Reports and Recommendations, Cathodic Protection Monitoring Reports and Logging of ICCP data and GACP systems.
Cathodic Protection Design and Anode Distribution Plans – Requirements for CP systems, Evaluation of exiting CP designs, life extension and retroﬁt of both ICCP and GACP systems, Design Calculations, Anode Drawings, Requirements for Anode manufacturing, Requirements for Anode Installation. EMCS Industries designs are covered by the appropriate Professional Indemnity Insurance for Offshore and Marine Assets.
Anode Installation and Project Management – Competitively priced Diving Operations complete with project installation Management.
CP Computer Modelling – CP designs may give inadequate coverage with uneven anode distribution, EMCS CP modelling has been a valuable tool for evaluation and optimisation of CP design.