Cathodic protection of A1 hull ship

Zhang Jinglei; Sun Keliang; Huang Xiuming; Yin Jiande; Peng Shujie

doi:10.1007/BF02849665

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Cathodic protection of A1 hull ship

OriginalPaper | Updated：2023-05-16

- Cathodic protection of A1 hull ship
- Cathodic protection of A1 hull ship
- 海洋湖沼学报（英文） 1990年8卷第3期页码：257-262
- Affiliations：
  
  Institute of Oceanology
- Author bio：
- Funds：
  
  Contribution No. 1640 from the Institute of Oceanology, Academia Sinica.
- DOI：10.1007/BF02849665
  中图分类号：
- 纸质出版：1990
- Accepted：
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Cathodic protection of A1 hull ship[J]. 海洋湖沼学报（英文）, 1990,8(3):257-262.

Jinglei, Z., Keliang, S., Xiuming, H. et al. Cathodic protection of A1 hull ship., Chin. J. Ocean. Limnol. 8, 257–262 (1990). https://doi.org/10.1007/BF02849665
Cathodic protection of A1 hull ship[J]. 海洋湖沼学报（英文）, 1990,8(3):257-262. DOI： 10.1007/BF02849665.

Jinglei, Z., Keliang, S., Xiuming, H. et al. Cathodic protection of A1 hull ship., Chin. J. Ocean. Limnol. 8, 257–262 (1990). https://doi.org/10.1007/BF02849665 DOI：

摘要

Abstract

Heavy paint coating loss and localized corrosion of the Al alloy hull occur red after less than a year's service of a ship at sea. Examination and analysis showed that the Mg-basic sacrificial anodes originally used for cathodic protection were not suitable as the resulting −1.3V-plus (vs Ag/AgCl) protection potential for the hull was too negative for the purpose. A new protection system was designed in which the protection current densities were 15mA/m2 for the hull and 350mA/m2 for the propeller. The hull protection potential under actual condition at sea was between −920mV and −1100mV (Ag/AgCl) and the protection efficiency was over 90%. The protection areas were calculated by using the formulas A=1.8×LBP×D+BC×LB×B for the hull and As=2Aas for the propeller.

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references

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Dai Zhongdao, Ji Mingtang, and Gu Jincheng, 1966. The protection Role of the Ca−Mg Layer in Providing Cathodic Protection for Steel in Seawater.Oceanologia et Limnologia Sinica 8 (1): 51–59. (in Chinese, with Russian abstract)

NACE, 1976. Control of External Corrosion on Underground or Submerged Metallic Piping Systems, NACE Standard Rp-01-69.

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Zhang Jinglei, 1987a. Anode-earth Resistance Formulae.Marine Sciences 5: 54–58. (in Chinese, with English abstract)

Zhang Jinglei, Guo Gongyu, Sun Keliang, and Hou Baorong, 1988b. Electrochemical Evaluation of Dissolution Characteristics of Al-basic Sacrificial Anodes in Seawater.Chinese Journal of Oceanology and Linnology 6 (1): 81–86.

Zhou Zungyan, Shi Weixin and Fang Bingfu, 1988. Regional Cathodic Protection for Metallic Structures at Sea.Journal of Chinese Society of Corrison and Protection 8 (3): 232–239. (in Chinese, With English abstract)

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