细晶<strong>FH40</strong>船用低温钢在海水<strong>-</strong>海冰中耦合失效行为研究

doi:10.11902/1005.4537.2025.042

中国腐蚀与防护学报

2025, Vol. 45

Issue (6): 1659-1668 CSTR: 32134.14.1005.4537.2025.042 DOI: 10.11902/1005.4537.2025.042

研究报告

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细晶FH40船用低温钢在海水-海冰中耦合失效行为研究

孙士斌¹, 高浩¹, 常雪婷²(

), 王东胜²(

)

1 上海海事大学物流工程学院上海 201306
2 上海海事大学海洋科学与工程学院上海 201306

Failure Behavior of Fine-grained FH40 Marine Low-temperature Steel in Conditions of Coupling Effect of Seawater-sea Ice

SUN Shibin¹, GAO Hao¹, CHANG Xueting²(

), WANG Dongsheng²(

)

1 School of Logistics Engineering, Shanghai Maritime University, Shanghai 201306, China
2 School of Ocean Science and Engineering, Shanghai Maritime University, Shanghai 201306, China

引用本文:

孙士斌, 高浩, 常雪婷, 王东胜. 细晶FH40船用低温钢在海水-海冰中耦合失效行为研究[J]. 中国腐蚀与防护学报, 2025, 45(6): 1659-1668.
Shibin SUN, Hao GAO, Xueting CHANG, Dongsheng WANG. Failure Behavior of Fine-grained FH40 Marine Low-temperature Steel in Conditions of Coupling Effect of Seawater-sea Ice[J]. Journal of Chinese Society for Corrosion and protection, 2025, 45(6): 1659-1668.

全文: PDF(8356 KB) HTML

摘要:

极地船舶航行过程中会由于冰载荷的作用导致涂料脱落，引起海冰摩擦、海水腐蚀同时发生的耦合作用。本文综合模拟人工海水腐蚀、海冰摩擦和电化学技术考察两种不同组织含量的FH40极地船用低温钢的腐蚀、磨损和摩擦腐蚀耦合行为，并使用白光干涉仪与扫描电子显微镜表征钢样的微观组织结构及磨损痕迹特征，开展海水海冰协同作用的钢材失效研究，为后续新型极地船用钢研发及应用提供支持。研究结果表明：相同条件下，随着钢材晶粒度增大，其摩擦系数和腐蚀速率有较大变化，在20 ℃空气中摩擦系数从0.28增加到0.35，而在海水介质中摩擦系数从0.23增加到0.25；在0 ℃时，空气介质摩擦系数从0.38增加到0.43，海水介质摩擦下系数从0.29增加到0.32；20 ℃海水浸泡时腐蚀速率分别为3.11 × 10^-3和3.86 × 10^-3 mm/a；在0 ℃海水浸泡实验时腐蚀速率分别变为2.11 × 10^-3和2.76 × 10^-3 mm/a。晶粒尺寸变细后能够强化材料硬度，增大材料位错运动阻碍和塑性变形抗力，使材料具有更强的耐磨损腐蚀性能。电化学腐蚀摩擦试验发现磨损痕迹的横截面宽度增加、磨损量上升、腐蚀电位向负方向移动，计算出由腐蚀引起的磨损增量W_C和由磨损引起的腐蚀增量C_W皆为正值，这些都为摩擦腐蚀相互耦合作用、互相促进提供有利的证明。

关键词 ： FH40船用低温钢, 海水腐蚀, 摩擦磨损, 电化学摩擦

Abstract：

During the voyage of polar ships, the coating of the ship's hull may peel off due to the erosive action of sea ice, thereby leading to the coupled effect of sea ice friction and seawater corrosion. Herein, the performance of FH40 polar marine low-temperature steel with two different microstructures in conditions of artificial sear-water corrosion, sea-ice wear and friction, as well as the coupling effect of sea-water corrosion and sea-ice friction at different temperatures was assessed via a simulation set, electrochemical techniques, in terms of the microstructure and the variation of wear trace characteristics for the test steels, as well as light interferometer and scanning electron microscope, in terms of the microstructure and wear trace characteristics of the test steels The results indicate that as the grain size of steel increases, there are significant changes in the friction coefficient and corrosion rate by the same test conditions, namely increasing from 0.28 to 0.35 for friction in air at 20 ^oC; from 0.23 to 0.25 for friction in artificial seawater at 20 ^oC; from 0.38 to 0.43 for friction in air at 0 ^oC; and from 0.29 to 0.32 for friction in artificial seawater at 0 ^oC; The corrosion rate increased from 3.11 × 10^-3 to 3.86 × 10^-3 mm/a in artificial seawater at 20 ^oC; However for immersion in artificial seawater at 0 ^oC the corrosion rate of the steel of fine grains is 2.11 × 10^-3 mm/a, while that of coarser rise to 2.76 × 10^-3 mm/a. This may be ascribed to that fine grains can result in higher hardness of the steel, increase the resistance to dislocation movement and plastic deformation, thus make the steel stronger wear- and corrosion-resistance. During friction test while free corrosion in artificial seawater of the steel, it was found that with the progress of corrosion process the cross-sectional width of wear marks increased, the wear amount increased, and the corrosion potential shifted to the negative direction. The calculated wear increment W_C caused by corrosion and the corrosion increment C_W caused by wear were both positive, providing favorable evidence for the coupling and mutual promotion of friction and corrosion.

Key words： FH40 marine low-temperature steel seawater corrosion friction and wear electrochemical friction

收稿日期: 2025-02-10 32134.14.1005.4537.2025.042

ZTFLH:

TG172

基金资助:国家重点研发计划(2022YFB3705303);上海市科委技术标准项目(21DZ2205700);上海市教委“曙光”计划(19SG46);上海深海材料工程技术中心项目(19DZ2253100)

通讯作者: 常雪婷，E-mail：xtchang@shmtu.edu.cn，研究方向为海工与船舶用钢研发与应用王东胜，E-mail：wangds@shmtu.edu.cn，研究方向为金属材料低温性能

Corresponding author: CHANG Xueting, E-mail: xtchang@shmtu.edu.cnWANG Dongsheng, E-mail: wangds@shmtu.edu.cn

作者简介: 孙士斌，男，1982年生，教授

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图1 2种FH40钢样的金相显微组织

表1 2种FH40钢样在不同温度下模拟海水中浸泡1200 h后的失重与腐蚀速率

图2 2种FH40钢样在0 ℃和20 ℃空气介质中摩擦系数

图3 2种FH40钢样在0 ℃和20 ℃海水介质中摩擦系数

图4 2种FH40钢样在无外加保护电位下摩擦前、摩擦中和摩擦后的开路电位

图5 2种FH40钢样在有、无外加保护电位下的摩擦系数

图6 2种FH40钢样在有、无外加保护电位下的动电位极化曲线

表2 2种FH40钢样在有无外加保护电位下的极化曲线拟合参数

图7 2种FH40钢样在有、无阴极保护下摩擦后磨痕三维形貌图

图8 2种FH40钢样在有、无阴极保护下摩擦后磨痕截面轮廓图

图9 2种FH40钢样在有、无保护电位下摩擦后磨痕形貌

表3 2种FH40钢样在海水中摩擦实验后的体积损失

图10 2种FH40钢样摩擦-腐蚀耦合作用因子

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