Comparative Study on Characteristics and Corrosivity of Seawater Environments in Extreme Marine Areas

doi:10.11902/1005.4537.2025.192

Journal of Chinese Society for Corrosion and protection

2026, Vol. 46

Issue (3): 931-937 DOI: 10.11902/1005.4537.2025.192

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Comparative Study on Characteristics and Corrosivity of Seawater Environments in Extreme Marine Areas

ZHANG Penghui(

), ZHAO Jiancang, JIANG Hao, PENG Wenshan, DING Kangkang

National Key Laboratory of Marine Corrosion and Protection, Luoyang Ship Material Research Institute, Qingdao 266237, China

Cite this article:

ZHANG Penghui, ZHAO Jiancang, JIANG Hao, PENG Wenshan, DING Kangkang. Comparative Study on Characteristics and Corrosivity of Seawater Environments in Extreme Marine Areas. Journal of Chinese Society for Corrosion and protection, 2026, 46(3): 931-937.

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Abstract

The ordinary characteristics of important environmental factors, including seawater temperature, salinity, dissolved oxygen content, and pH value, which are strongly associated with material corrosion in equatorial high-temperature sea areas, polar low-temperature sea areas, and China's coastal sea areas, were systematically compared and analyzed. Based on the corrosion rate data of T2 Cu-alloy and the relevant environmental parameters of seawater, the corrosivity of extreme marine environments and those along the coastal regions of China was assessed using the grey correlation analysis method. Based on the calculated results, a comprehensively comparative study on the corrosivity of seawater in extreme marine environments was performed. The results indicated that among others, the seawater in tropical high-temperature regions exhibited the highest corrosivity, while temperature being the predominant influencing factor.

Key words: seawater corrosion polar regions equator seawater corrosivity Cu-alloy

Received: 23 June 2025 32134.14.1005.4537.2025.192

ZTFLH:

TG172.5

Corresponding Authors: ZHANG Penghui, E-mail: zhangph10@126.com

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	ZHANG Penghui
	ZHAO Jiancang
	JIANG Hao
	PENG Wenshan
	DING Kangkang

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https://www.jcscp.org/EN/10.11902/1005.4537.2025.192 OR https://www.jcscp.org/EN/Y2026/V46/I3/931

Table 1 Dimensionless processing results of benchmark data for T2 Cu-alloy

Table 2 Calculation results of absolute differences

Fig.1 Annual average variation of seawater environmental factors in high-temperature marine regions and nearshore areas of China: (a) temperature, (b) salinity, (c) dissolved oxygen concentration, (d) pH value

Fig.2 Annual average variation of seawater environmental factors in low-temperature marine regions and nearshore areas of China: (a) temperature, (b) salinity, (c) dissolved oxygen concentration, (d) pH value

Fig.3 Variation patterns of the T2 Cu-alloy corrosion rates and seawater corrosivity evaluation factors

Fig.4 Correlation between seawater corrosivity evaluation factors and corrosion rates

Fig.5 Comparison of seawater corrosivity evaluation factors in different sea areas

Fig.6 Analysis of the influencing factors on seawater corrosion evaluation factor: (a) seatemperature, (b) seasalinity

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