Numerical analysis of flow-accelerated corrosion of a hull in the marine environment

被引：0

作者：

Liu Y. ^{[1
]}

Zhang Y. ^{[1
]}

机构：

[1] School of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin

来源：

Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2021年 / 42卷 / 01期

关键词：

Cathodic protection; CFD; Corrosion; Flow around hull; Flow-accelerated corrosion (FAC); Hull corrosion; Oxygen transport; Turbulence;

D O I：

10.11990/jheu.201907015

中图分类号：

学科分类号：

摘要：

To predict the corrosion rate of a hull surface in the dynamic marine environment and provide a reliable reference for anticorrosion design, a calculation model of flow-accelerated corrosion is established in this paper using numerical simulation. First, a computational fluid dynamics model is established for the seawater flow field around the hull; flow field information including velocity, pressure, and oxygen concentration distribution are obtained by calculation. Then, a flow-accelerated corrosion model of the hull in seawater is established based on these parameters. Finally, the model is solved, and the mass transfer coefficient and corrosion rate distribution of all points on the hull surface are obtained. Results show that the corrosion rates at the rear and lateral rear parts of the hull are significantly higher than those at the other parts owing to a higher concentration of oxygen at these parts. The corrosion rate increases with the increase of flow velocity. The maximum corrosion rate can be up to 22 mm/a under a no protective coating condition, and is much higher than that under the static state condition. Therefore, these two parts should be taken into full consideration so as to arrange the anode position rationally when cathodic protection is adopted. Copyright ©2021 Journal of Harbin Engineering University.

引用

页码：145 / 151

页数：6

共 13 条

[1] CHE Pengcheng, LIU Guangxing, CHENG Yi, Review of the influence of FAC to high-pressure heater tubes as well as the analysis of heat-exchange tube brand to FAC, Boiler manufacturing, 3, pp. 58-62, (2017)
[2] XIAO Zhuonan, WANG Chao, XU Hong, Study on flow accelerated corrosion of ultra supercritical units in thermal system, Journal of engineering for thermal energy and power, 34, 6, pp. 142-146, (2019)
[3] XIAO Zhuonan, BAI Dongxiao, WANG Chao, Et al., The influence factors and prevention of flow accelerated corrosion in drainage system of supercritical units, Industrial safety and environmental protection, 45, 1, pp. 70-73, (2019)
[4] AJMAL T S, ARYA S B, THIPPESWAMY L R, Et al., Influence of green inhibitor on flow-accelerated corrosion of API X70 line pipe steel in synthetic oilfield water, Corrosion engineering, science and technology, 55, 6, pp. 487-496, (2020)
[5] WEERAKUL S, LEAUKOSOL N, LISTER D H, Et al., Effects on flow-accelerated corrosion of oleylpropanediamine under single-phase water conditions pertinent to power plant feedwater, Corrosion, 76, 2, pp. 217-230, (2020)
[6] ZENG L, ZHANG G A, GUO X P., Effect of hydrodynamics on the inhibition effect of thioureido imidazoline inhibitor for the flow accelerated corrosion of X65 pipeline steel, Corrosion, 72, 5, pp. 598-614, (2016)
[7] LIN C H, FERNG Y M., Predictions of hydrodynamic characteristics and corrosion rates using CFD in the piping systems of pressurized-water reactor power plant, Annals of nuclear energy, 65, pp. 214-222, (2014)
[8] AHMED W H, BELLO M M, EL NAKLA M, Et al., Flow and mass transfer downstream of an orifice under flow accelerated corrosion conditions, Nuclear engineering and design, 252, pp. 52-67, (2012)
[9] KEATING A, NESIC S., Numerical prediction of erosion-corrosion in bends, Corrosion, 57, 7, pp. 621-633, (2001)
[10] (2009)

← 1 2 →