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Addtime：2016-05-19 17:57:22 Print
Seawater is one of the most corrosive naturally occurring environments. For vessels trading worldwide, it is essential to provide protection against corrosion of their hull and ballast tank; thus, ensuring lower maintenance costs and longer operational life expectancy.
A detailed design based on the intended operation of a vessel is required for the successful application of a cathodic protection system.
The unique Zinc & Aluminum alloys that are used for the production of our anodes have been developed in our laboratories and perform reliably under a wide range of environmental conditions.
Design
The external application of cathodic protection on a ship’s hull and ballast tank depends greatly on the ship’s trade type, its trade routes, and its design. Generally, cathodic protection requirements vary based on a combination of parameters, such as water salinity, water temperature, and sailing speed range. The condition of the vessel’s external paint coating also affects the demand for cathodic protection.
For new applications, a detailed study for the protection of the?ballast tank?and hull area of the vessel is necessary in order to provide the maximum protection against corrosion at any stage of the vessel’s service life. For retrofit applications, an extensive evaluation of the condition of the existing anodes should be performed in order to define the quantity and quality of the new anodes required. This evaluation should include the initial and final conditions of the vessel’s coating and steel components.
Our cathodic protection design involves the use of sacrificial anodes and follows standard design rules for all applications. It is suggested that in order to make a proper assessment of the extent of paint damage, the design period should be considered to be well beyond the duration of the average expected dry-docking period.
Our professional engineering department conducts detailed studies for hull and/or ballast tanks in accordance with recognized codes of practice such as DNV, Lloyds, ABS, GL, GB etc.
In order to proceed with each study, the following design parameters should be provided by the client:
·?????????Required design life of the system;
·?????????Breakdown/failure of coating (or coating details);
·?????????Ballast factors;
·?????????Required electrochemical capacity (or desired alloy);
·?????????Construction drawings, general arrangement plan, capacity plan, mid-ship section plan, shell expansion or construction plan;
·?????????Vessel sailing areas (Brackish or salt water).
At SYNCOR we apply the above listed design parameters and use our professional experience to provide the following:
·?????????Detailed calculations in accordance with all recognized codes of practice;
·?????????Justification of selected parameters;
·?????????Optimization of the required quantity;
·?????????Detailed design drawings (AutoCAD) and installation plan.
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