The effects of hydrostatic pressure, dissolved oxygen, temperature and flow velocity, and their interaction on the corrosion rates of E690 high-strength steel (HSS) in simulated marine environments were studied using ...The effects of hydrostatic pressure, dissolved oxygen, temperature and flow velocity, and their interaction on the corrosion rates of E690 high-strength steel (HSS) in simulated marine environments were studied using response surface methodology. The results show that the flow velocity exerts the most significant influence on the corrosion rate of E690 HSS. Consequently, the corrosion behavior of E690 HSS under varying flow velocities were analyzed profoundly from initial pitting corrosion to long-term corrosion properties. The results indicate that the flow state facilitates the mass transfer and enhances the adsorption tendency of Cl− by enhancing the electrochemical activity of the steel surface. These factors accelerate the electrochemical reactions, resulting in increased pitting density, depth and the long-term corrosion rates in dynamic seawater environments.展开更多
采用等离子增强磁控溅射(PEMS)技术在海工用钢E690表面沉积Ti N与Ti Al N涂层。采用划痕仪测量膜基结合力、X射线衍射仪(XRD)分析薄膜物相、摩擦磨损试验机测量摩擦系数、SEM观察磨痕形貌。结果表明:涂层Ti N具有强烈(111)择优取向,Ti A...采用等离子增强磁控溅射(PEMS)技术在海工用钢E690表面沉积Ti N与Ti Al N涂层。采用划痕仪测量膜基结合力、X射线衍射仪(XRD)分析薄膜物相、摩擦磨损试验机测量摩擦系数、SEM观察磨痕形貌。结果表明:涂层Ti N具有强烈(111)择优取向,Ti Al N择优取向为(200)。Ti N、Ti Al N涂层的平均结合力为35.3、32.9 N;Ti N、Ti Al N涂层后E690钢的摩擦系数分别为0.19、0.11,与E690钢基体相比分别降低了29.6%、59.3%。E690钢试样的磨损机制主要为黏着磨损,涂层后以疲劳磨损为主。涂层后的E690钢具有更好的减摩性、耐磨性,其中沉积Ti Al N涂层的抗磨减摩效果更好。展开更多
基金supported by the National Natural Science Foundation of China(Nos.U20A20279 and 51601137)the Hubei Province Key Laboratory of Systems Science in Metallurgical Process(No.Y202207).
文摘The effects of hydrostatic pressure, dissolved oxygen, temperature and flow velocity, and their interaction on the corrosion rates of E690 high-strength steel (HSS) in simulated marine environments were studied using response surface methodology. The results show that the flow velocity exerts the most significant influence on the corrosion rate of E690 HSS. Consequently, the corrosion behavior of E690 HSS under varying flow velocities were analyzed profoundly from initial pitting corrosion to long-term corrosion properties. The results indicate that the flow state facilitates the mass transfer and enhances the adsorption tendency of Cl− by enhancing the electrochemical activity of the steel surface. These factors accelerate the electrochemical reactions, resulting in increased pitting density, depth and the long-term corrosion rates in dynamic seawater environments.
文摘采用等离子增强磁控溅射(PEMS)技术在海工用钢E690表面沉积Ti N与Ti Al N涂层。采用划痕仪测量膜基结合力、X射线衍射仪(XRD)分析薄膜物相、摩擦磨损试验机测量摩擦系数、SEM观察磨痕形貌。结果表明:涂层Ti N具有强烈(111)择优取向,Ti Al N择优取向为(200)。Ti N、Ti Al N涂层的平均结合力为35.3、32.9 N;Ti N、Ti Al N涂层后E690钢的摩擦系数分别为0.19、0.11,与E690钢基体相比分别降低了29.6%、59.3%。E690钢试样的磨损机制主要为黏着磨损,涂层后以疲劳磨损为主。涂层后的E690钢具有更好的减摩性、耐磨性,其中沉积Ti Al N涂层的抗磨减摩效果更好。
