Docks Piers & Jetties
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Docks Piers & Jetties
Addtime：2016-05-19 17:58:13 Print
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Nowadays the majority of marine infrastructure design (jetties, port, docks, etc.) involves the use of steel sheets or pipe piles. It is the priority of the owners and operators of such infrastructure to protect these steel structures against corrosion. Cathodic protection is the proffered method of application, due to its ability to extend the operational life of marine infrastructure, reduce its associated maintenance costs, and ensure the uninterrupted operation of docks and jetties.
Typically, coating materials are applied during construction to protect steel surfaces against corrosion. However, approximately 50% of the coating material on the mud part areas of the structure is destroyed during installation, and 1-2% of the coating material on the splash zone, as well as the submerged zone, is destroyed annually. The corrosion rate of bare steel surfaces can vary from 50μm/year – 300μm/year, depending on the areas of the piles. The loss of steel thickness due to corrosion can also vary with water composition, oxygen concentration, marine growth, and/or water velocity.
Average values of corrosion penetration on steel piles and steel sheet piles.
The use of cathodic protection can reduce corrosion rates up to 95% in the submerged and mud part zones, although special precautions must be taken for the splash and atmospheric zones. For the complete protection of the piles, it is suggested to use cathodic protection systems, in combination with coating systems and polyethylene (PE) jackets.
SYNCOR provides solutions for the cathodic protection of new or existing marine infrastructure, such as jetties, piers and marine harbors, by applying a variety of designs based on sacrificial anodes, Impressed Current Cathodic Protection (ICCP) systems, or a combination of these. Each system meets the unique environmental requirements of the intended application, and covers at least the minimum design standards. ?
Design Parameters
Detailed engineering calculations, based on national and/or international standards, are used in the design of efficient cathodic protection systems with the intent to eliminate corrosion on the embedded and submerged areas of each protected structure. In order to proceed with our design, we typically ask for the following parameters:
·?????????Type of piling
·?????????Number/length of piling
·?????????Design life of the system
·?????????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 (CP) Systems
Based on these design parameters, and our extended professional experience, we can provide the following:
·?????????Detailed calculations in accordance to any recognized code of practice;
·?????????Justification of selected parameters;
·?????????Design optimization in order to minimize the required quantity;
·?????????Detailed design and installation drawings (AutoCAD).
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