Environmental effects on materials Effect of SO2 on the corrosion of unalloyed steel and weathering steel - an attempt to simulate Atmospheric Corrosion

1996 ◽  
Vol 47 (9) ◽  
pp. 505-510 ◽  
Author(s):  
S. Oesch
Keyword(s):  
Environmental Effects ◽  
Atmospheric Corrosion ◽  
Weathering Steel ◽  
Unalloyed Steel

Optimizing the resistance of Ni-advanced weathering steel to marine atmospheric corrosion with the addition of Al or Mo

2021 ◽  
Vol 279 ◽  
pp. 122341
Author(s):  
Xuexu Xu ◽  
Tianyi Zhang ◽  
Wei Wu ◽  
Shan Jiang ◽  
Jianwei Yang ◽  
...  
Keyword(s):  
Atmospheric Corrosion ◽  
Weathering Steel

Industrial Atmospheric Corrosion Resistance of P-RE Weathering Steel

2011 ◽  
Vol 18 (6) ◽  
pp. 67-73 ◽  
Author(s):  
Feng-yi Mi ◽  
Xiang-dong Wang ◽  
Zhi-pu Liu ◽  
Bing Wang ◽  
Yun Peng ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Atmospheric Corrosion ◽  
Weathering Steel

Corrosive Environment Factors and their Influence on the Development of Weathering Steel Corrosion Products

2020 ◽  
Vol 832 ◽  
pp. 137-146
Author(s):  
Monika Kubzová ◽  
Vit Křivý ◽  
Viktor Urban ◽  
Katerina Kreislova
Keyword(s):  
Atmospheric Corrosion ◽  
Steel Surface ◽  
Protective Layer ◽  
Steel Structures ◽  
Corrosion Products ◽  
Outdoor Environment ◽  
Weathering Steel ◽  
Low Alloy Steels ◽  
Time Of Wetness ◽  
The Impact

This article deals with the topic of atmospheric corrosion. Atmospheric corrosion causes damage to nearly 80% of all existing steel structures. The main parameters of atmospheric corrosion are the time of wetness (TOW), air temperature and aggressive corrosive agents such as chlorides, sulfur dioxide and others. Currently, low alloy steels with improved atmospheric corrosion resistance called weathering steels are used for the steel structures located in outdoor environment. A protective layer of corrosion products is created on the steel surface and this layer can reduce continuation of corrosion of steel. The time of wetness together with the effect of aggressive corrosive agents are various for surfaces oriented vertically or horizontally. Experimental tests of atmospheric weathering steel were carried out to monitor the impact of location and position of surface on the different constructions. These tests allow monitoring the development of corrosion products in real exposures. The article presents a part of the research, which includes monitoring the development of the thickness of corrosion products with regard to the position on the structure. Research is developed to refine of prediction models with the aim of improving determination of corrosion losses during the service life of the structure. Second part of these experiments is dedicated to measuring the deposition rate of chlorides. Chlorides have a corrosive impact on the steel surface. Under normal conditions the chlorides does not create suitable environment for the development of a protective layer of corrosion products.

Atmospheric corrosion monitoring of a weathering steel under an electrolyte film in cyclic wet–dry condition

2014 ◽  
Vol 78 ◽  
pp. 130-137 ◽  
Author(s):  
Ch. Thee ◽  
Long Hao ◽  
Junhua Dong ◽  
Xin Mu ◽  
Xin Wei ◽  
...  
Keyword(s):  
Atmospheric Corrosion ◽  
Weathering Steel ◽  
Corrosion Monitoring ◽  
Electrolyte Film

scholarly journals Effect of Sulfuric Acid Patination Treatment on Atmospheric Corrosion of Weathering Steel

Metals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 591
Author(s):  
Ana Crespo ◽  
Iván Díaz ◽  
Delphine Neff ◽  
Irene Llorente ◽  
Sagrario Martínez-Ramírez ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Atmospheric Corrosion ◽  
Scientific Literature ◽  
Urban Atmosphere ◽  
Weathering Steel ◽  
X Ray Diffraction ◽  
Civil Structures ◽  
X Ray ◽  
Sulfuric Acid Treatment ◽  
Micro Raman Spectroscopy

The requirements for the formation of a protective patina on conventional weathering steels (WS) are well known in the scientific literature related to civil structures. However, these criteria are not always given due consideration when WS is used in cultural heritage, as in the case of sculptural work. An artificial patina was produced simulating artists’ working procedures using a direct patination technique, applying a solution of 10% H2SO4 on WS specimens. These were exposed for two years in the urban atmosphere of Madrid along with weathering steel specimens without artificial patina, called natural patina. The patinas generated have been analyzed using colorimetry, micro-Raman spectroscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD) and thickness measurements.The artificial patina color formed hardly differs from the color that the natural patina acquires from practically the beginning of its formation in the atmosphere of Madrid. After two years, the atmospheric corrosion rate of patinated WS is lower than 6 µm/year. The sulfuric acid treatment accelerates the protective ability of the patina with respect to the natural patina according to the ratio goethite to lepidocrocite (α/γ). Chromium-rich goethite is located in the inner part of the artificial patina as well as chromium-rich ferrihydrite. Ferrihydrite may act as a precursor of nanophasic goethite.

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