表面技术2025，Vol.54Issue(16)：67-79,13.DOI:10.16490/j.cnki.issn.1001-3660.2025.16.005
极地船舶螺旋桨用不锈钢的腐蚀与海冰冲蚀性能研究
Corrosion Resistance and Sea Ice Erosion Performance of Stainless Steel for Polar Ship Propellers
摘要
Abstract
When polar ships navigate in ice zones,their propellers are subject to sea ice impact and seawater corrosion,causing surface erosion and corrosion damage and imposing potential safety hazards.The work aims to explore the damage characteristics and mechanisms of stainless steel surfaces used for polar ship propellers under sea ice erosion and seawater corrosion and simulate the process of sea ice erosion by numerical simulation methods. Three kinds of propeller steel samples with different alloy contents were tested by sea ice erosion experiments where a self-made erosion test platform was used for low temperature environment.The corrosion performance under seawater immersion at different temperatures was tested.The surface grain structure,macro morphology and microstructure of the experimental samples were observed and analyzed by metallographic microscope,optical microscope,white light interference microscope and scanning electron microscope.The erosion rate and corrosion rate of the samples were characterized by weight loss method and electrochemical workstation and the effects caused by different alloy contents were compared with those caused by ice erosion and seawater corrosion damage.Two turbulence models,SST k-ω model and standard k-ε model,were used to simulate the erosion process in FLUENT.Oka erosion model was used to calculate the wall erosion rate,which was compared with the experimental value. Three kinds of stainless steel used for polar ship propellers have obvious damage and some part of the surface after erosion has a diameter of about 100 μm and even flake spalling.The surface damage after corrosion is mainly pitting pits and there are obvious differences between the morphologies after erosion and corrosion.The erosion rate of the sample is about 1.39×10-8-3.56×10-8 kg/(m2·s).The electrochemical polarization curve analysis shows that the corrosion potential of the stainless steel shifts positively,the corrosion current density decreases and the corrosion rate decreases with the decrease of ambient temperature.The corrosion rate reaches the highest at 20℃and is about 9.846×10-4-6.175×10-3 mm/a.By comparing the three kinds of stainless steel,it is found that the erosion resistance and corrosion properties of the stainless steel can be significantly improved and the surface damage is significantly reduced with the increase of alloying elements Cr and Ni content.It is found in the simulation that the erosion rate obtained by SST k-ω model is about 1.11×10-8～2.42×10-8 kg/(m2·s)and the variation trend of the simulation value and the steel surface erosion rate under this model is close to the experimental value. Cr and Ni contents are an important factor to improve the erosion resistance and corrosion performance of the stainless steel for polar ship propellers,which can densify the passivation layer and strengthen its repair ability.At the same time,the fine grain can also improve the ability of the stainless steel to resist erosion.In simulated erosion,there will be a speed drop area in front of the wall,where the static pressure increases and the dynamic pressure decreases.The erosion rate obtained under the SST k-ω model is in good agreement with the experimental value.关键词
极地螺旋桨用不锈钢/海冰冲蚀/海水腐蚀/机理分析/冲蚀仿真/实验对照Key words
stainless steel for polar ship propellers/sea ice erosion/seawater corrosion/mechanism analysis/erosion simulation/experimental control分类
矿业与冶金引用本文复制引用
孙士斌,郭昇旭,常雪婷,蒋颖畅,王东胜..极地船舶螺旋桨用不锈钢的腐蚀与海冰冲蚀性能研究[J].表面技术,2025,54(16):67-79,13.基金项目
国家重点研发计划(2022YFB3705303) （2022YFB3705303）
上海市科委技术标准项目(21DZ2205700) （21DZ2205700）
上海市教委"曙光"计划(19SG46) （19SG46）
上海深海材料工程技术中心资助项目(19DZ2253100)National Key Research and Development Program(2022YFB3705303) （19DZ2253100）
The Technical Standard Project of Shanghai Science and Technology Commission(21DZ2205700) （21DZ2205700）
The"Shuguang"Program of Shanghai Municipal Education Commission(19SG46) （19SG46）
The International Cooperation and Exchange Project of the Ministry of Science and Technology(CU03-29) （CU03-29）
The Project of Shanghai Deep Sea Material Engineering Technology Center(19DZ2253100) （19DZ2253100）
