Sensitive analysis of calculation of corrosion rate according to standard approach

Construmat 2018

Kotes, P.^1 ; Strieska, M.^1 ; Brodnan, M.^1

Department of Structures and Bridges, Civil Engineering Faculty, University of Zilina, Univerzitna 8215/1, Zilina

010 26, Slovakia^1

关键词: Accelerated corrosion tests;    Corrosion damage;    Dose-response functions;    Input parameter;    Measuring stations;    Sensitive analysis;    Standard materials;    Structural steels;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/385/1/012031/pdf
DOI  :  10.1088/1757-899X/385/1/012031

来源: IOP

【 摘 要 】

There is a lot of factors, which may affect the reliability of the construction, as durability, serviceability and safety of construction or its parts elements. Corrosion damage either reinforcement is one of the most important factor in reinforced concrete structures or structures made from structural steel. This corrosion damage can be determined by actual standard EN ISO 9223. This standard describe the equations, called dose-response functions, for calculation of the corrosion rate rcorr for standard materials like carbon steel, zinc and so on. These equations are determined from the corrosion rate of samples under outdoor atmospheric corrosion in cooperating with measuring of climatic data. Input parameters on calculation of the dose-response functions are sulphur dioxide, temperature, relative humidity and chloride ions. This article is focused on the calculation of the carbon steel corrosion rate according the dose-response function and its sensitive analysis for various concentration of the input parameters. This variability of the input parameters may represents the different conditions, in which the constructions may appears. In practice, this information may provide, which of the input parameter influence the most the calculated corrosion rate and if it is needed to more concentrate its measuring station network. The location of the outdoor stations with the specimens or choice of accelerated corrosion test may be also provided.