ANTI-CORROSION EFFECT OF CATHODIC PROTECTION ON MILD STEEL IMMERSED CYCLICALLY IN SEAWATER

J Chin Soc Corr Pro

1998, Vol. 18

Issue (2): 131-135 DOI:

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ANTI-CORROSION EFFECT OF CATHODIC PROTECTION ON MILD STEEL IMMERSED CYCLICALLY IN SEAWATER

WU Jian-hua WEN Xiu-bian LIU Guang-zhou CHEN Guang-zhang (Qingdao Branch of Luoyang Ship Material Research Institute; Qingdao 266071)

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Abstract By cyclic immersion testing for simulation of water ballast tank condition, the effect of protective potential, protective current density and immersion ratio on protection effectiveness for Q235B grade mild steel was investigated. The experimental results indicated that protective efficiency might be higher than 90% if cathodic protection parameters were chosen appropriately, and that protection effectiveness would vary with the immersion cycle number. The investigation also showed that better results could be achieved by applying high current initially, followed by low current, and then less electric energy would be consumed. For mild steel immersed cyclically in seawater, -0.95V(SCE) was suggested as the protective potential criteria.

Key words: Cathodic protection Cyclic seawater immersion Mild steel Water ballast tank Protective potential criteria

Received: 25 April 1998

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Cite this article:

WU Jian-hua WEN Xiu-bian LIU Guang-zhou CHEN Guang-zhang (Qingdao Branch of Luoyang Ship Material Research Institute; Qingdao 266071). ANTI-CORROSION EFFECT OF CATHODIC PROTECTION ON MILD STEEL IMMERSED CYCLICALLY IN SEAWATER. J Chin Soc Corr Pro, 1998, 18(2): 131-135.

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https://www.jcscp.org/EN/ OR https://www.jcscp.org/EN/Y1998/V18/I2/131

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