The paper presents an example of modeling the maintenance period of S235JR steel structural elements subjected to atmospheric and chemical corrosion. An idealized linear relationship between the corrosion rate and exposure time was assumed. The model was built based on literature data and the results of our own corrosion tests. The results of the increase in corrosion rate over time were evaluated from the point of view of material strength.Corrosion is generally defined as the destruction of materials caused by a reaction with the surrounding environment [1, 2].
Engineering structural elements and structures can be resistant to corrosion or subject to corrosion. This depends on the construction material and exposure conditions, i.e., environmental conditions. The most favorable environmental conditions are provided by a dry environment (e.g., the environment inside buildings). Less favorable are environments: humid indoors, wet outdoors, and wet with temperature fluctuations. The worst are highly wet and sunny environments (corrosion is most intense in them), seawater environments, and chemically aggressive environments (gaseous, liquid, or solid). Depending on the expected environmental conditions, appropriate materials for structures should be selected (e.g., weathering steels), protective coatings should be applied [1], or protective systems should be used in facilities, e.g., to drain rainwater from them [3]. In this way, the durability of structures located in environmental conditions susceptible to corrosion is increased. The effects of corrosion are estimated from various points of view (they are multifaceted), taking into account the latest knowledge from a given scientific discipline. (…)
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Source: Logistyka Magazine 6/2011