Investigation on Optimum Protection Potential Decision of Al Alloy(5083F) in Sea Water by Impressed Current Cathodic Protection

Above ground tanks are frequently used for the storage of Oil & Gas products and they can present a challenge to design an optimum corrosion control system. The base of the tank lies on or near the surface of the ground and is in contact with the material used to support the tank and therefore presents a corrosion challenge. One method of protecting the bottom of a tank is by use of an impressed current cathodic protection (ICCP) system. There are a number of types of Cathodic Protection systems which are designed to protect the tank base in these circumstances. The details of the design of such a system are very important for optimal performance and also the cost, if a number of such systems are to be installed The consequence of a poor design can be uneven distribution of protection potential on the tank base or in the worst cases regions where corrosion of the tank base can take place. An over designed system on the other hand can have significant economic consequences both in terms of installation cost and running costs. Computer modeling is now widely used to optimize CP Designs and verify that the design of the cathodic protection (CP) system meets the design requirements. In this paper a modeling tool is presented which enables corrosion engineers to evaluate the performance of tank base CP systems by predicting the protection provided to the tank for a given CP design. The paper describes and discusses all aspects of the modeling methodology, which it then applies to several different design concepts.

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Analysis and Simulation of the Factors Affecting the Impressed Current Cathodic Protection Potential of the Ship

DEStech Transactions on Materials Science and Engineering ◽

10.12783/dtmse/ammme2016/6937 ◽

2017 ◽

Author(s):

Xiang-jun WANG ◽

Yi LIU

Keyword(s):

Cathodic Protection ◽

Factors Affecting ◽

Impressed Current ◽

Protection Potential ◽

Impressed Current Cathodic Protection

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DESIGN ANALYSIS OF IMPRESSED CURRENT CATHODIC PROTECTION (ICCP) SYSTEM FOR UNDERWATER STRUCTURE OF INDONESIAN WARSHIP (KRI)

JOURNAL ASRO ◽

10.37875/asro.v11i1.210 ◽

2020 ◽

Vol 11 (1) ◽

pp. 134

Author(s):

Arda Arda Widyaksa ◽

Pompy Pratisna ◽

Wawan Kusdiana ◽

M. Yunus Abdullah

Keyword(s):

Cathodic Protection ◽

Sea Water ◽

Design Analysis ◽

Sacrificial Anode ◽

Reference Standard ◽

Corrosion Attack ◽

Impressed Current ◽

Underwater Structure ◽

Theory Calculation ◽

Impressed Current Cathodic Protection

In carrying out these basic tasks the Navy relies heavily on the readiness of the Indonesian Warship (KRI),including the readiness of underwater construction in KRI from corrosion attack on sea water. Nowadays, KRIuses Sacrificial Anode Cathodic Protection (SACP) from corrosion attack. Whereas, SACP system has someweakness, such as the lifetime protection is short. The aim of this paper is to the analysis of Impressed CurrentCathodic Protection (ICCP) design of the underwater structure of KRI using computative theory calculation andspecimen test. The results of ICCP design showed that the specimens I required 0.081 Ampere (A) forprotection current, specimen 2 required 0.010 A for protection current, specimens 3 required 0.00251 A. Withpotential protection between -800 mV up to -1100 mV, it described that the ICCP system is reasonable. Theresult of cathodic protection design towards an underwater structure of KRI (TR-40 Type) showed that 1.75 forAmpere (A) and 3.35 volt DC for voltage. The benefit of this paper is a reference standard in the planning of theICCP design at KRI.Keywords: Corrosion, Underwater Structure of Warship, Impressed Current Cathodic Protection (ICCP).

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A New Control Algorithm for Impressed Current Cathodic Protection on the Underwater Hull

Materials Science Forum ◽

10.4028/www.scientific.net/msf.449-452.125 ◽

2004 ◽

Vol 449-452 ◽

pp. 125-128

Author(s):

Jin Seok Oh ◽

Myung Hyun Lee ◽

J.D. Kim ◽

J.Y. Lee

Keyword(s):

Cathodic Protection ◽

Control Algorithm ◽

Corrosion Current ◽

Current Control ◽

Harmonic Suppression ◽

Protection Strategy ◽

Impressed Current ◽

Protection Potential ◽

Cathodic Protection System ◽

Impressed Current Cathodic Protection

Cathodic protection is a system of preventing corrosion by forcing all surfaces of a hull to be cathode by providing external anodes. A metal can be made cathodic by electrically connecting it to a more anodic metal within the electrolyte. Anodes of these metals corrodepreferentially, the corrosion current of the anode achieving cathodic protection of the underwater hull to which they are connected. This paper presents a new current control algorithm for ICCP (Impressed Current Cathodic Protection) system. The anode of ICCP system is controlled by an external DC source with converter. The function of anode is to conduct the protective current into seawater. The DC source is generally obtained from main power system that contains a transformer, converter and etc. The proposed algorithm can operate AC-DC converter with current link. This algorithm includes the harmonic suppression control strategy and the optimum protection strategy and has tried to test the requirement current density for protection, the influence of voltage, the protection potential. Also, the properties of ICCP protected hull of ship in seawater are evaluated.

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