Marine
Harbours & Jetties
Seawater is one of the most corrosive of naturally occurring environments. Metallic structures immersed in seawater are subject to severe corrosion including close inshore structures such as harbours, jetties and piers, constructed from sheet or tubular piles.
It is essential that these structures be protected against the ravages of corrosion by the application of cathodic protection in order to achieve or exceed its design life
BAC Corrosion Control specialises in the design, manufacture and supply, installation, commissioning, monitoring and maintenance of cathodic protection systems for these marine structures.
BAC Corrosion Control utilise, in the main, impressed current cathodic protection systems with installed capacities running into hundreds of amperes for large, bare steel structures. Impressed current cathodic protection current is provided by either manual or automatically controlled transformer rectifiers powering impressed current anodes specifically designed to operate in the conditions prevalent on site.
BAC Corrosion Control carry out their designs in accordance with international standards under the control of our ISO 9001:2000 certified quality management system. Whilst system design lives in excess of 25 years are normal, it is inevitable that some anodes will be damaged over this period and require replacement. BAC Corrosion Control designsensure that such replacements can normally be effected without resorting to the use of divers.
Experience and Recent Clients
BAC Corrosion Contro l has provided cathodic protection services to Marine Industry Clients throughout the world. The following is a sample of the Services and Applications supplied by BAC Corrosion Control over recent years.
A full experience list is available within our Pre-Qualification Document
Tidal Installations
Design, Supply and Install |
Iron ore handling berth, Port Talbot, UK |
Design, Supply and Install |
Roll on/Roll off Berth, Aqaba, Jordan |
Design, Supply and Install |
Oil Terminals, Benghazi and Misurata, Libya |
Design, Supply and Install |
Submarine Base, Pakistan |
Monitor and Maintain |
Ore Unloading Terminal, UK |
Maintain & Upgrade |
Clay Terminal. UK |
Turnkey Project |
St Eustatius Jetty, Dutch Antilles |
Non-Tidal Installations
Design, Supply and Install |
Tripoli Power Station Jetty, Libya |
Design, Supply and Install |
Ferrochrome Jetty, Greece |
Estuary Installations
Design, Supply and Install |
Humber Oil Jetty, Berth 3, Immingham, UK |
Supply and Installation |
Dalmeny Berth 2 and MVR Platform, UK |
Design, Supply and Install |
Tilbury Berth, Thames, UK |
Data Required for Cathodic Protection Enquiry
BAC Corrosion Control willingly provides advice and outline system design for cathodic protection of Harbours and Jetties. In order to do this, as much of the following information should be provided - the more information supplied, the closer our proposals will be to the final designs:
- Type of piling
- No/length of piling
- Depth of piling above and below seabed
- Specification for pile coating
- Method of continuity bonding
- Layout drawings
- Classified hazardous areas
- Facilities for isolation from other structures
- Power supply type and availability
- Existing Cathodic Protection Systems
Ships and Boats (Impressed Current Systems for Water Jets on Fast Ferries)
The material used for the hull of fast aluminium vessels withstands corrosion in seawater very well under normal operation conditions, due to the passivating oxide layer of the surface.
Sacrificial anodes made of Aluminium alloy are normally used for cathodic protection of the critical areas, but for waterjets and thruster tunnels with high water velocity, practical experience have shown, that the lifetime and capacity of sacrificial anodes are limited, and do not give sufficient protection.
BAC Corrosion Control has solved the above mentioned problem by the design of an Impressed Current Cathodic Protection (ICCP) system. The "Award" systems, which have been installed in a number of vessels already, secures full protection and avoid the risk for overprotection, by means of strategically installed reference electrodes, used for control and monitoring.
Experience and Recent Clients
BAC Corrosion Control has provided cathodic protection services to fast ferry shipbuilders and operators throughout the world. The following is a sample of the vessels fitted with the BAC Corrosion Control "Award" system over recent years.
Alstom "Corssaire", NEL, Greece
A full experience list and Capability Document is available upon request.
Stena, UK, Denmark & The Netherlands |
3 no HSS 1500 and 1 no HSS 900 vessels with 4 jets each |
NEL, Greece |
3 no Steel monohull vessels with 3/4 jets each |
Irish Ferries, Eire |
96m Catamaran "Jonathan Swift" with 4 jets |
Minoan Flying Dolphins, Greece |
5 vessels of various configurations |
IDO Turkey |
96m "Turgut Ozal" with 4 jets |
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