Experimental Corrosion Tests on Weathering Steel Bridges

Křivý, Vít; Kreislová, Kateřina; Urban, Viktor

doi:10.4028/www.scientific.net/ssp.227.537

Cited by 11 publications

(4 citation statements)

References 3 publications

(2 reference statements)

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“…Table 3 shows the appearance of patinas observed on various structural members of the bridge inside the box girders, along with characteristics regarding the colour and adhesion of the protective layer. According to the literature [ 3 , 4 , 20 , 21 ], at the initial stage of corrosion of weathering steel, the patina formed is light brown in colour and, as the phase transformations continue, the patina layer darkens to a dark brown colour. The thickness of the patina increases gradually to hundreds of micrometres.…”

Section: Resultsmentioning

confidence: 99%

Corrosion Assessment of a Weathering Steel Bridge Structure after 30 Years of Service

et al. 2021

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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.

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Section: Resultsmentioning

confidence: 99%

Corrosion Assessment of a Weathering Steel Bridge Structure after 30 Years of Service

et al. 2021

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“…where Rs is the solution resistance between the working electrode and the saturated calomel electrode in the electrolytic cell Q f is the constant phase angle element of the double galvanic capacitance, R f is the transfer resistance of the membrane layer, Q dl is the capacitance of the membrane layer on the surface of the substrate, and R ct is the membrane layer resistance. Since both bars exhibit both exhibit capacitive resistance properties, and both surfaces under surface sulphite environments will be by the appearance of transient passivation phenomenon, resulting in uneven surface activity of the passivation lm [24] , the capacitive elements in the tted circuits are commonly used in place of the constant-phase-angle elements. The constant phase angle element coe cient n indicates the nature of the element, 1 > n > 0.…”

Section: Weekly Immersion Experimentsmentioning

confidence: 99%

Corrosion performance of new Cu-V weathering steels in harsh industrial environments

Zhang,

Yin,

Zhang

et al. 2024

Preprint

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The structure and properties of weathering steels have a significant impact on the safety of practical applications and are also closely linked to localised corrosion induced by external elements. In this study, the structure and properties of weathering steels and corrosion mechanisms were investigated using various microtesting techniques, with a special study of the effect of copper elements on the corrosion of weathering steels and ordinary steel bars. Experimental data showed that HRB400aE (0.3% Cu) and HRB500aE (0.6% Cu) lost less weight in corrosion in the peri-immersion experiments compared to HRB400E and HRB500E when Cu and V elements were present. In electrochemical tests, HRB400aE (0.3% Cu) and HRB500aE (0.6% Cu) showed a smaller trend of potential decrease, slower rate of decrease, smaller self-corrosion currents and lower electrochemical activity than HRB400E and HRB500E. These results confirm the protective effect of trace alloying elements such as copper and vanadium on the corrosion resistance of steel bars in industrial atmospheres.

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“…This attachment method provides tight contact between corrosion specimen and examined surface of the steel structure. The contact area between the pressure element and the corrosion specimen is minimal, so there is no influence in the development of corrosion products on the exposed surface and specimens copy the thermal inertia of structural elements [12]. Three corrosion specimens have been installed on each of the examined surfaces.…”

Section: Experimental Corrosion Testing On Weathering Steel Bridgesmentioning

confidence: 99%

The Development of Corrosion Processes on Weathering Steel Bridges

Urban

Křivý

Kreislová

2015

Procedia Engineering

Self Cite

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This paper deals with experimental corrosion tests carried out on weathering steel bridges. The basic property of the weathering steel is its ability to create a protective layer on its surface in favorable environments. This protective layer called patina covers the surface of the whole structure, protects against external climatic influences and the construction resists completely without an anticorrosion coating. This paper presents the program of experimental atmospheric corrosion test carried out on road bridges made of weathering structural steel. The article presents results of corrosion tests after one year of exposure of corrosion specimens. This paper describes the influence of the position and location of an exposed surface, evaluates the different development on typical surfaces affected by leaking water and explains the high degree of correlation dependence between measured corrosion loss and average thickness of corrosion products.

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Experimental Corrosion Tests on Weathering Steel Bridges

Cited by 11 publications

References 3 publications

Corrosion Assessment of a Weathering Steel Bridge Structure after 30 Years of Service

Corrosion Assessment of a Weathering Steel Bridge Structure after 30 Years of Service

Corrosion performance of new Cu-V weathering steels in harsh industrial environments

The Development of Corrosion Processes on Weathering Steel Bridges

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