Corrosion Processes on Weathering Steel Railway Bridge in Prague

Urban, Viktor; Křivý, Vít; Buchta, Vojtěch

doi:10.11113/jt.v78.8581

Cited by 3 publications

(3 citation statements)

References 10 publications

(10 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7). This observation is typical for weathering steel bridges with main girders and upper deck [13,14]. The upper surfaces of lower flanges are more affected by the deposition of dust and chlorides compared to other typical surfaces of the bridge.…”

Section: Experimental Atmospheric Testing Of Corrosion Products Devel...mentioning

confidence: 73%

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

Kubzová

Křivý

Urban

et al. 2020

KEM

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Experimental Atmospheric Testing Of Corrosion Products Devel...mentioning

confidence: 73%

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

Kubzová

Křivý

Urban

et al. 2020

KEM

Self Cite

View full text Add to dashboard Cite

show abstract

“…The influence of the environment is a specific action, which manifests itself in steel structures mainly by their corrosion damage. Accurate prediction of corrosion damage will provide structural engineers and researchers with the necessary data to evaluate the durability of building structures [1][2][3]. Probabilistic calculations also make it possible to evaluate the impact of specific environmental factors.…”

Section: Influence Of Individual Environmental Parameters On Corrosion Damage; mentioning

confidence: 99%

“…Their operation, maintenance, and repairs require approximately 35% of the overall material and energy needs and produce roughly 30% of all waste and environmental burdens. The primary factors affecting the conditions of the operated bridge structures include not only natural changes to materials, hidden structural defects, and increased intensity of traffic but also degradation processes that occur in structural elements due to the environmental stress caused by the surrounding environment [1,2]. The negative impact of the degradation processes can be documented on the technical conditions of road bridges in the Czech Republic: out of the total of approximately 16,000 operated bridge structures in the Czech Republic, roughly 1000 are in a very poor or emergency condition [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Probabilistic Prediction of Corrosion Damage of Steel Structures in the Vicinity of Roads

2020

Self Cite

View full text Add to dashboard Cite

The design, construction, and maintenance of steel structures must be carried out in a way that ensures they will be able to reliably operate for the whole duration of their planned service life. To ensure sufficient durability, it is necessary to determine and evaluate the characteristics of the appropriate environment in which the structure will be placed. This submission focuses on the specific environment surrounding roads that are treated with de-icing salts during winter maintenance. It investigates the dependency between corrosive damage to the structure and the relevant parameters of the environment. Basic corrosive factors include temperature, relative humidity, deposition of chlorides and sulfur dioxide, precipitation, the pH of precipitation as well as many other parameters. An accurate estimate of corrosive damage requires an analysis of the long-term trends in concentrations of individual corrosive factors, while respecting their randomly varying attributes. The article, hence, introduces and evaluates stochastic prediction models that are based on long-term programs focusing on the evaluation of the corrosive aggressiveness of the environment, while taking into account random variations of the nature of the input parameters. The use of stochastic prediction models allows us to perform sensitivity analysis that can determine the impact of specific corrosive factors on the corrosive damage caused to the structure. The article is supplemented by sensitivity analysis focusing on an evaluation from the effects of the deposition of chlorides on the corrosive damage to steel bridge structures. The analysis was carried out using data obtained from experimental measurements of the deposition rates of chlorides in the vicinity of roads in the Czech Republic.

show abstract