Wierzbicki Tomasz, Rutkowska Gabriela, Żółtowski Mariusz, Nagirniak Mykola
Institute of Civil Engineering, Warsaw University of Life Sciences, 166 Nowoursynowska Street, 02-787 Warsaw, Poland.
Materials (Basel). 2024 Dec 3;17(23):5919. doi: 10.3390/ma17235919.
The safety and durability of engineering structures, like bridges, which are designed from weathering steels, are conditioned by the development of a sufficiently protective layer of corrosion products. Air pollution, the microclimate around the bridge, the time of wetness, the structural solution of the bridge, and the position and orientation of the surface within the bridge structure all influence the development of protective layers on the surface of the weathering steel. The condition of the formed patina relies on the working conditions of the structure. In fact, it is exposed to various types of salts that appear during the operation of the facility. In this article, the strength parameters of uncoated weathering steel were tested after accelerated aging of welded steel samples in a salt spray chamber. The tests showed the expected degradation of steel after long-term exposure to salt and changes in the strength parameters such as tensile strength, yield strength, and, importantly, impact strength, both in the steel itself and in the elements of the welded connection. The obtained results showed that the change is influenced by both the conditions in which the samples are made (welding method) and the direction of the welded joint (along or across the rolling direction).
由耐候钢设计的工程结构（如桥梁）的安全性和耐久性，取决于是否能形成足够的腐蚀产物保护层。空气污染、桥梁周围的微气候、湿润时间、桥梁的结构设计以及桥梁结构内表面的位置和方向，都会影响耐候钢表面保护层的形成。所形成的铜绿状况取决于结构的工作条件。实际上，它会接触到设施运行过程中出现的各种盐分。在本文中，对焊接钢样品在盐雾试验箱中加速老化后，测试了未涂层耐候钢的强度参数。试验表明，长期暴露在盐环境中后，钢材出现了预期的降解，钢材本身以及焊接连接部件的强度参数，如抗拉强度、屈服强度，重要的是冲击强度，都发生了变化。所得结果表明，这种变化受样品制作条件（焊接方法）和焊接接头方向（沿轧制方向或与轧制方向交叉）的影响。
