Abstract
Impressed current cathodic protection (ICCP) is an electrochemical method to prevent or stop corrosion of steel reinforcement in concrete structures. The use of this technique is limited although it has been proven to be effective. One of the reasons is the high cost of anode material, commonly titanium anode. Hence there is a need for alternative anode materials to lower the cost and at the same time to improve the performance of the ICCP system through design. This paper reviews carbon fiber reinforced polymer (CFRP) as an anode for ICCP systems in concrete and discusses the degradation mechanism and operating conditions of the anode. It also gives an overview of the performance of CFRP as an anode material, from laboratory experiments to field operation.
Highlights
Chloride-induced corrosion is one of the major causes of damage or deterioration of steel reinforced concrete structures
An impressed current cathodic protection (ICCP) system consists an anode system which is usually laid on the concrete surface and connected with the positive terminal of a direct voltage source
Cathodic prevention is a preventative approach when it is applied on new structures that are expected to become contaminated by chloride during their service life, using only small amount of current to suppress corrosion
Summary
Chloride-induced corrosion is one of the major causes of damage or deterioration of steel reinforced concrete structures. To deal with this problem, impressed current cathodic protection (ICCP) has been proven to be an effective method to stop, slow down or prevent corrosion, even in a highly corrosive environment [1,2,3]. According to the ISO 12696 standard, the current density for cathodic protection is 220 mA/m2 (of steel surface) and for prevention it is 0.2-2 mA/m2 [4]. In a cathodic prevention system, because of the use of low current density, the requirements of the anode material can be lowered. This paper is based on a literature study and reviews the usage of CFRP as anode for ICCP systems, in both laboratory experiments and field applications
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