海洋气候大气腐蚀过程环境因素对薄液膜内物质传递的影响

doi:10.11902/1005.4537.2022.318

中国腐蚀与防护学报

2023, Vol. 43

Issue (5): 1015-1021 CSTR: 32134.14.1005.4537.2022.318 DOI: 10.11902/1005.4537.2022.318

研究报告

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海洋气候大气腐蚀过程环境因素对薄液膜内物质传递的影响

汪洋¹, 刘元海², 慕仙莲², 刘淼然¹(

), 王俊¹, 李秋平², 陈川¹

^1.中国电器科学研究院股份有限公司工业产品环境适应性国家重点实验室广州 510300
^2.中国特种飞行器研究所结构腐蚀防护与控制航空科技重点实验室荆门 448035

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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摘要:

通过多因素正交试验模拟了湿热海洋环境下受盐雾影响的金属大气腐蚀过程，研究了稳态环境条件下表面覆盖薄液膜的Cu腐蚀机理。根据温度、湿度等环境条件计算了液膜的状态变化，分析了不同厚度与Cl^-浓度的薄液膜下溶解氧的迁移过程，最终通过对比试验与理论计算结果，揭示了环境因素对薄液膜尺寸、浓度等状态与腐蚀传质动力学过程的影响关系。

关键词 ：大气腐蚀, 环境因子, 物质传递, 腐蚀模型, Cu

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

收稿日期: 2022-10-14 32134.14.1005.4537.2022.318

ZTFLH:

TG171

通讯作者: 刘淼然，E-mail: liumr@cei1958.com，研究方向为腐蚀与防护

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

作者简介: 汪洋，男，1994年生，硕士生

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引用本文:

汪洋, 刘元海, 慕仙莲, 刘淼然, 王俊, 李秋平, 陈川. 海洋气候大气腐蚀过程环境因素对薄液膜内物质传递的影响[J]. 中国腐蚀与防护学报, 2023, 43(5): 1015-1021.
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.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2022.318 或 https://www.jcscp.org/CN/Y2023/V43/I5/1015

表 1 大气腐蚀正交试验环境因素条件

图1 正交试验样品模式图

图 2 不同环境条件下金属失重量与时间变化

图3 腐蚀速率与时间变化关系

表2 不同环境条件下NaCl潮解液膜性质状态

图4 电解质液膜中氧的溶解与扩散变化及反应示意图

图5 浓度随扩散距离的变化

图6 不同条件下暴露不同时间后Cu腐蚀速率的理论计算值与实测值

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