Development of a Corrosion Potential Measuring System Based on the Generalization of DACS Physical Scale Modeling
1 Ocean University of China, Qingdao, 266100 China
2 CNOOC Changzhou Paint & Coating Industry Research Institute Co., LTD, Tanggu, 300452 China
a Corresponding author: firstname.lastname@example.org
A feasible method in evaluating the protection effect and corrosion state of marine cathodic protection (CP) systems is collecting sufficient electric potential data around a submarine pipeline and then establishing the mapping relations between these data and corrosion states of pipelines. However, it is difficult for scientists and researchers to obtain those data accurately due to the harsh marine environments and absence of dedicated potential measurement device. In this paper, to alleviate these two problems, firstly, the theory of dimension and conductivity scaling (DACS) physical scale modeling of marine impressed current cathodic protection (ICCP) systems is generalized to marine CP systems, secondly, a potential measurement device is developed specially and analogue experiment is designed according to DACS physical scale modeling to verify the feasibility of the measuring system. The experimental results show that 92 percent of the measurement errors are less than 0.25mv, thereby providing an economical and feasible measuring system to get electric potential data around an actual submarine pipeline under CP.
© Owned by the authors, published by EDP Sciences, 2015
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