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. 2023 Feb 17;13(1):2826.
doi: 10.1038/s41598-023-30015-1.

Corrosion damage and life prediction of concrete structure in the coking ammonium sulfate workshop of iron and steel industry

Yao Lv  1 , Ditao Niu  2   3 , Xiguang Liu  4   5 , Mingqiang Lin  6 , Yue-Chen Li  4
Affiliations

Corrosion damage and life prediction of concrete structure in the coking ammonium sulfate workshop of iron and steel industry

Yao Lv et al. Sci Rep. .

Abstract

Iron and steel plants emit a large amount of CO2 and SO2 in the production process, and the high concentrations of acid gases lead to serious corrosion damage of concrete structures. In this paper, the environmental characteristics and corrosion damage degree of concrete in a 7-year-old coking ammonium sulfate workshop were investigated, and the neutralization life prediction of the concrete structure was carried out. Besides, the corrosion products were analyzed through concrete neutralization simulation test. The average temperature and relative humidity in the workshop were 34.7 °C and 43.4%, and they were 1.40 times higher and 1.70 times less than those of the general atmospheric environment, respectively. Both the concentrations of CO2 and SO2 were significantly different in various sections of the workshop, and they were much higher than those of the general atmospheric environment. The appearance corrosion and compressive strength loss of concrete were more serious in the sections with high SO2 concentration, such as vulcanization bed section and crystallization tank section. The neutralization depth of concrete in the crystallization tank section was the largest, with an average value of 19.86 mm. The corrosion products gypsum and CaCO3 were obviously visible in the surface layer of concrete, while only CaCO3 could be observed at 5 mm. The prediction model of concrete neutralization depth was established, and the remaining neutralization service life in the warehouse, synthesis section (indoor), synthesis section (outdoor), vulcanization bed section, and crystallization tank section were 69.21 a, 52.01 a, 88.56 a, 29.62 a, and 7.84 a, respectively.

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Conflict of interest statement

The authors declare no competing interests.

Figures

Figure 1
Figure 1
The structure plan of the ammonium sulfate workshop.
Figure 2
Figure 2
Temperatures in the ammonium sulfate workshop and general atmospheric environment.
Figure 3
Figure 3
Relative humidity in the ammonium sulfate workshop and general atmospheric environment.
Figure 4
Figure 4
CO2 concentration in the ammonium sulfate workshop.
Figure 5
Figure 5
SO2 concentration in the ammonium sulfate workshop.
Figure 6
Figure 6
Appearance of concrete structure in the ammonium sulfate workshop. (a) The column in the warehouse; (b) the column in the synthesis section (outdoor); (c) the platform cornice in the vulcanization bed section; (d) the floor in the crystallization tank section.
Figure 7
Figure 7
Frequency distribution histogram of concrete neutralization depth in the ammonium sulfate workshop.
Figure 8
Figure 8
Frequency distribution histograms of concrete neutralization depth in various sections of the ammonium sulfate workshop. (a) Warehouse; (b) synthesis section (indoor); (c) synthesis section (outdoor); (d) vulcanization bed section; (e) crystallization tank section.
Figure 9
Figure 9
Frequency distribution histogram of concrete compressive strength in the ammonium sulfate workshop.
Figure 10
Figure 10
XRD patterns of concrete under the action of CO2 and SO2. Q Quartz (SiO2), G Gypsum (CaSO4 2H2O), C Calcite (CaCO3), H Portlandite (Ca(OH)2).
Figure 11
Figure 11
Thermal analysis curves of concrete under the action of CO2 and SO2.
Figure 12
Figure 12
Frequency distribution histogram of Ks.
Figure 13
Figure 13
Frequency distribution histogram of x0.
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References

    1. Papadakis VG, Vayenas CG, Fardis MNA. Reaction problem of engineering approach to the concrete carbonation. ACIhE J. 1989;35(10):1639–1650.
    1. Papadakis VG, Vayenas CG, Fardis MN. Experimental investigation and mathematical modeling of the concrete carbonation problem. Chem. Eng. Sci. 1991;46(5/6):1333–1338. doi: 10.1016/0009-2509(91)85060-B. - DOI
    1. Ishida T, Li CH. Modeling of carbonation based on thermo-hygro physics with strong coupling of mass transport and equilibrium in micro-pore structure of concrete. J. Adv. Concr. Technol. 2008;2(6):303–316. doi: 10.3151/jact.6.303. - DOI
    1. Gunasekara C, et al. Microstructure and strength development of quaternary blend high-volume fly ash concrete. J. Mater. Sci. 2020;55:6441–6456. doi: 10.1007/s10853-020-04473-1. - DOI
    1. Mainier FB, Almeida PCF, Nani B, Fernandes LH, Reis MF. Corrosion caused by sulfur dioxide in reinforced concrete. Open J. Civ. Eng. 2015;05(04):379–389. doi: 10.4236/ojce.2015.54038. - DOI