The first steel with improved resistance towards atmospheric corrosion, the so-called weathering steel, was patented in the USA in 1933 and was initially used for coal railway cars, and after that, in building and bridge engineering. Weathering steels show higher corrosion resistance than carbon steels in many types of atmosphere due to their ability to form a compact, stable, adherent and protective patina during the time of exposure. Morphological evaluation of the appearance of the corrosion product layer, together with phase analysis of its components, can enable determination of the type of patina and the degree of protection of the steel. To support the visual assessment of a patina, a check based on the qualitative and quantitative phase analysis of its components may be carried out, and the PAI (Protective Ability Index) can be calculated. The estimation of the corrosion processes on original Polish-made weathering steel (12HNNbA) was carried out on a 30-year-old bridge in Poland. There are some structural problems within the deck derived not only from corrosion but also steel cracking, both inside and outside the boxes, at different heights. Fourteen representative samples of patina were analysed and their phase structures were determined by the X-ray powder diffraction method. The PAIs were determined and analysed.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8306178 | PMC |
| http://dx.doi.org/10.3390/ma14143788 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Studies on the Virucidal Effects of UV-C of 233 nm and 275 nm Wavelengths.
Viruses
December 2024
Institute of Hygiene and Environmental Medicine, University Medicine Greifswald, Ferdinand-Sauerbruch-Str., 17475 Greifswald, Germany.
Among the physical decontamination methods, treatment with ultraviolet (UV) radiation is a suitable means of preventing viral infections. Mercury vapor lamps (254 nm) used for room decontamination are potentially damaging to human skin (radiation) and harmful to the environment (mercury). Therefore, other UV-C wavelengths (100-280 nm) may be effective for virus inactivation on skin without damaging it, e.
View Article and Find Full Text PDFThe Buckling Behavior and Reliability Evaluation of a Cable-Stayed Bridge with Unique-Shaped Towers.
Materials (Basel)
December 2024
School of Aerospace Engineering and Applied Mechanics, Tongji University, Shanghai 200092, China.
Buckling is a significant concern for cable-stayed bridges that incorporate a large number of steel components, particularly those featuring unique-shaped towers that require further examination due to the intricate internal force and stress distribution. This paper investigates the buckling behavior of a cable-stayed bridge with inverted V-shaped towers. The cable tower is characterized by its unique design that consists of diagonal bracings and columns in a compression-bending state.
View Article and Find Full Text PDFAn overview of climate changes and its effects on health - from mechanisms to One Health.
J Allergy Clin Immunol Pract
December 2024
Swiss Institute of Allergy and Asthma Research (SIAF), University Zurich, Davos, Switzerland.
Human activities, primarily the burning of fossil fuels, widespread deforestation, soil erosion or machine-intensive farming methods, manufacturing, food processing, mining, and construction iron, cement, steel, and chemicals industry, have been the main drivers of the observed increase in Earth's average surface temperature and climate change. Rising global temperatures, extreme weather events, ecosystems disruption, agricultural impacts, water scarcity, problems in access to good quality water, food and housing, and profound environmental disruptions such as biodiversity loss and extreme pollution are expected to steeply increase the prevalence and severity of acute and chronic diseases. Its long-term effects cannot be adequately predicted or mitigated without a comprehensive understanding of the adaptive ecosystems.
View Article and Find Full Text PDFMethods for improving the thermal performance of thermal bridges of lightweight steel-framed buildings.
PLoS One
December 2024
School of Architecture and Civil Engineering, Xihua University, Chengdu, China.
The existence of a large number of thermal bridges in the Lightweight Steel-Framed (LSF) building leads to its energy loss. The reduction of the heat transfer of thermal bridges is crucial for increasing the thermal performance of the building envelope. In this study, the infrared technology was first used to measure the temperature of LSF buildings, and clear thermal bridge junctions were determined.
View Article and Find Full Text PDFFatigue Crack Growth Performance of Q370qENH Weathering Bridge Steel and Butt Welds.
Materials (Basel)
December 2024
Hunan Tieyuan Civil Engineering Testing Co., Ltd., Changsha 410075, China.
Article Synopsis
- Weathering steel is favorable for highway and railway bridges due to its good corrosion resistance; however, the fatigue performance of weld joints is crucial for structural integrity.
- This study examines the microstructural properties and fatigue crack growth behavior of Q370qENH weathering steel weld joints, highlighting the effects of different stress ratios and plate thicknesses.
- Results show that welding improves microstructure and fatigue crack growth rates vary by region, with the base steel showing the highest rates while the weld area exhibits the lowest; data from this study is useful for future research on fatigue in steel bridge joints.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!