Effect of Environmental Factors on Material Transfer in Thin Liquid Film During Atmospheric Corrosion Process in Marine Environment

doi:10.11902/1005.4537.2022.318

Journal of Chinese Society for Corrosion and protection

2023, Vol. 43

Issue (5): 1015-1021 DOI: 10.11902/1005.4537.2022.318

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Effect of Environmental Factors on Material Transfer in Thin Liquid Film During Atmospheric Corrosion Process in Marine Environment

WANG Yang¹, LIU Yuanhai², MU Xianlian², LIU Miaoran¹(

), WANG Jun¹, LI Qiuping², CHEN Chuan¹

^1.China National Electric Apparatus Research Institute Co., Ltd., State Key Laboratory of Environmental Adaptability for Industrial Products, Guangzhou 510300, China
^2.China Special Vehicle Reserch Institute, Key Laboratory of Corrosion Protection and Control of Aviation Technology, Jingmen 448035, China

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Abstract

The occurrence of atmospheric corrosion is always companied initially with the formation of electrolyte film on the surface of metals, and then the corrosion process is affected by soluble substances such as oxygen from the surrounding environment and the nature of metals themselves. The process of atmospheric corrosion reaction relates to the phase transition of the gas, solid, and liquid substance, as well as the material transfer among different phases. This study simulated the atmospheric corrosion process of the pure copper plate in humid and hot environmental conditions as well as sea fog atmosphere by the multi-factor orthogonal corrosion test. The corrosion mechanism of copper plates beneath thin liquid films in steady state environment was also studied. By calculating the state changes of the thin liquid film with the variation of temperature, humidity and other environmental conditions, the migration process of dissolved oxygen within the thin liquid films of different thicknesses and Cl^- concentrations was analyzed. The influence of environmental factors on the thin liquid film, electrolyte concentration, and corrosion kinetics was revealed eventually by comparing the experimental data and theoretical calculation results.

Key words: atmospheric corrosion environmental factor material transfer corrosion model copper

Received: 14 October 2022 32134.14.1005.4537.2022.318

ZTFLH:

TG171

Corresponding Authors: LIU Miaoran, E-mail: liumr@cei1958.com

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	WANG Yang
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	MU Xianlian
	LIU Miaoran
	WANG Jun
	LI Qiuping
	CHEN Chuan

Cite this article:

WANG Yang, LIU Yuanhai, MU Xianlian, LIU Miaoran, WANG Jun, LI Qiuping, CHEN Chuan. Effect of Environmental Factors on Material Transfer in Thin Liquid Film During Atmospheric Corrosion Process in Marine Environment. Journal of Chinese Society for Corrosion and protection, 2023, 43(5): 1015-1021.

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https://www.jcscp.org/EN/10.11902/1005.4537.2022.318 OR https://www.jcscp.org/EN/Y2023/V43/I5/1015

Table 1 Environmental conditions of atmospheric corrosion orthogonal experiment

Fig.1 Schematic drawing of experimental sample

Fig.2 Mass losses of Cu as a function of time under different environmental conditions

Fig.3 Corrosion rates of Cu as a function of time under different environmental conditions

Table 2 Physical properties of NaCl solution under different environmental conditions

Fig.4 Schematic diagram of dissolution, diffusion and reaction of oxygen in electrolyte solution

Fig.5 Concentration distribution of oxygen in electrolyte solution

Fig.6 Calculated and measured data of corrosion rate of Cu after exposure for different time under different conditions

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