【摘要】 极地船舶在冰区航行时将受到冰摩擦和海水腐蚀的双重影响，而船舶用钢磨损和腐蚀间的交互作用机制尚未明晰。本文选用EH40、FH40和921A船舶用钢作为实验材料，通过力学-电化学结合的方法研究不同牌号钢材在模拟海水中的磨损腐蚀行为。结果表明：3种船舶用钢均发生磨粒磨损，磨痕表面生成分布不同的摩擦膜。其中，921A钢由于具有较高硬度、较稳定的马氏体结构，呈现出最佳的耐磨蚀性能，FH40钢次之，EH40钢最差。虽然由腐蚀直接引起的体积损失在总体积损失中占比较低，但腐蚀能显著加剧钢材的磨损。FH40和EH40钢的腐蚀磨损由纯机械摩擦占主导地位，由腐蚀引发的磨损增量分别占比18.5%和32.8%。921A钢由腐蚀引发的磨损增量占比则是纯机械摩擦占比的两倍，腐蚀加速机械磨损现象明显。更多还原

【Abstract】 When navigating in polar ice regions, ships are subject simultaneously to both ice friction and seawater corrosion. However, the interaction behavior between wear and corrosion of shipbuilding steels remains unclear. In this study, the corrosion-wear behavior in seawater of three types of shipbuilding steels, EH40, FH40, and 921A was studied via mechanical-electrochemical approach. The results indicate that the three shipbuilding steels all suffered from abrasive wear, while different clusters composed of abrasive dusts and corrosion products co-exist on the worn surfaces. Among them, 921A demonstrated the best wear and corrosion resistance due to its high hardness and stable martensitic structure, followed by FH40, while the EH40 exhibiting the poorest performance. Although the volume loss directly caused by corrosion accounts for a relatively small proportion of the total volume loss, corrosion can significantly accelerate the wear of steel. For FH40 and EH40, the total corrosion wear is dominated by the portion of pure mechanical friction, and the corrosion induced wear increments accounts for 18.5% and 32.8%, respectively. In contrast, the corrosion induced wear increment for 921A was twice the proportion of pure mechanical friction, indicating a marked corrosion acceleration effect on mechanical wear.更多还原