Análisis de fallos de los tubos de cobre utilizados en los intercambiadores de calor de los ventiloconvectores

Fatih Sargın; Kürşat Kanbur; İlyas Türkmen

doi:10.3989/revmetalm.239

Autores/as

Fatih Sargın Manisa Celal Bayar University, Metallurgical and Materials Engineering Department https://orcid.org/0000-0002-2683-4543
Kürşat Kanbur Manisa Celal Bayar University, Metallurgical and Materials Engineering Department https://orcid.org/0000-0001-6343-2992
İlyas Türkmen Manisa Celal Bayar University, Metallurgical and Materials Engineering Department https://orcid.org/0000-0002-5424-5412

DOI:

https://doi.org/10.3989/revmetalm.239

Palabras clave:

Análisis microestructural, Análisis de fallos, Corrosión por nido de hormigas, Intercambiador de calor, Tubo de cobre

Resumen

Los intercambiadores de calor (IC) están formados por tubos de cobre y acero y se utilizan para calentar y enfriar el aire del ambiente. Uno de los principales problemas que se observan en los IC son las fugas en las tuberías de cobre. En este estudio, se examinaron en detalle muestras de tuberías de cobre fallidas y en buen estado de funcionamiento utilizadas durante diferentes periodos de tiempo. Los análisis microestructurales se realizaron mediante microscopía óptica (MO) y microscopía electrónica de barrido (MEB) para detectar los casos de corrosión en las superficies de las tuberías de cobre. Además, se definieron los productos de corrosión de las muestras mediante difracción de rayos X (DRX), espectroscopia de energía dispersiva (EDS) y análisis de espectroscopia infrarroja con transformada de fourier (FTIR). Se observó la formación de túneles interconectados en la sección transversal de la muestra de tubería de cobre fallida que tenían dimensiones microscópicas y productos de corrosión. En consecuencia, todos los resultados de los análisis que se obtuvieron de las muestras apuntaban a un mecanismo de corrosión conocido como corrosión por nido de hormiga. Se concluyó que la razón principal de la corrosión estaba relacionada con los aditivos de tipo etilenglicol que se utilizaban en los IC junto con el agua de red.

Descargas

Los datos de descargas todavía no están disponibles.

Citas

Bastidas, D.M., La Iglesia, V. M., Cano, E., Fajardo, S., Bastidas, J.M. (2008). Kinetic study of formate compounds developed on copper in the presence of formic acid vapor. J. Electrochem. Soc. 155 (12), C578. https://doi.org/10.1149/1.2988059

Bastidas, D.M., Cayuela, I., Bastidas, J.M. (2006). Ant-nest corrosion of copper tubing in air-conditioning units. Rev. Metal. 42 (5), 367-381. https://doi.org/10.3989/revmetalm.2006.v42.i5.34

Boulay, N., Edwards, M. (2001). Role of temperature, chlorine, and organic matter in copper corrosion by-product release in soft water. Water research 35 (3), 683-690. https://doi.org/10.1016/S0043-1354(00)00320-1

Cozzarini, L., Marsich, L., Schmid, C. (2020). Ant-nest corrosion failure of heat exchangers copper pipes. Eng. Fail. Anal. 109, 104387. https://doi.org/10.1016/j.engfailanal.2020.104387

Elliott, P., Corbett, R.A. (2001). Ant nest corrosion-Exploring the labyrinth. In Corrosion Reviews 19 (1), 1-14. https://doi.org/10.1515/CORRREV.2001.19.1.1

Fontana M.G. (1986). Corrosion engineering. McGraw Hill, New York.

Gialanella, S., Malandruccolo, A. (2020). Aerospace Alloys. Springer. https://doi.org/10.1007/978-3-030-24440-8

Hamidah, I., Solehudin, A., Hamdani, A., Hasanah, L., Khairurrijal, K., Kurniawan, T., Mamat, R., Hammouti, B. (2021). Corrosion of copper alloys in KOH, NaOH, NaCl, and HCl electrolyte solutions and its impact to the mechanical properties. Alex. Eng. J. 60 (2), 2235-2243. https://doi.org/10.1016/j.aej.2020.12.027

Jones, R.H. (2001). Environmental effects on engineered materials. 1st Edition, CRC Press. https://doi.org/10.1201/9780203908129

Khan, M.Z.H., Hossain, M.I., Halder, P.K., Hasan, M.R., Al-Mamun, M.R. (2016). Fuel properties of pyrolytic tyre oil and its blends with diesel fuel-towards waste management. IJEWM 18 (4), 335-348. https://doi.org/10.1504/IJEWM.2016.081835

Kuźnicka, B. (2009). Erosion-corrosion of heat exchanger tubes. Eng. Fail. Anal. 16 (7), 2382-2387. https://doi.org/10.1016/j.engfailanal.2009.03.026

Lachowicz, M.M. (2020). A metallographic case study of formicary corrosion in heat exchanger copper tubes. Eng. Fail. Anal. 111, 104502. https://doi.org/10.1016/j.engfailanal.2020.104502

Lee, S.K., Hsu, H.C., Tuan, W.H. (2016). Oxidation Behavior of Copper at a Temperature below 300 ºC and the Methodology for Passivation. Mater. Res. 19, 51-56. https://doi.org/10.1590/1980-5373-MR-2015-0139

Li, H. Y., Dong, C. F., Xiao, K., Li, X.G., Zhong, P. (2016). Effects of chloride ion concentration and pH values on the corrosion behavior of Cr12Ni3Co12Mo4W ultra-high-strength martensitic stainless steel. Int. J. Miner. Metall. Mater. 23 (11), 1286-1293. https://doi.org/10.1007/s12613-016-1350-9

Lytle, D.A., Nadagouda, M.N. (2010). A comprehensive investigation of copper pitting corrosion in a drinking water distribution system. Corros. Sci. 52 (6), 1927-1938. https://doi.org/10.1016/j.corsci.2010.02.013

May, P.M., Ritchie, I.M., Tan, E.T. (1991). The corrosion of copper in ethylene glycol-water mixtures containing chloride ions. J. Appl. Electrochem. 21 (4), 358-364. https://doi.org/10.1007/BF01020222

Moss, A.K. (1969). The corrosion of copper and copper alloys. Australian Corrosion Engineering 13 (5), 5-11.

Nguyen, T.K., Sheikholeslami, M., Jafaryar, M., Shafee, A., Li, Z., Chandra Mouli, K.V., Tlili, I. (2020). Design of heat exchanger with combined turbulator. J. Therm. Anal. Calorim. 139 (1), 649-659. https://doi.org/10.1007/s10973-019-08401-7

Notoya, T. (1997). Effect of different types of alkylaldehyde and crystal grain size on the morphology of a localized corrosion in copper tubes. J. Mater. Sci. Lett. 16 (16), 1406-1409. https://doi.org/10.1023/A:1018561327446

Peltola, H., Lindgren, M. (2015). Failure analysis of a copper tube in a finned heat exchanger. Eng. Fail. Anal. 51, 83-97. https://doi.org/10.1016/j.engfailanal.2015.02.016

Rezaei, M., Mahidashti, Z., Eftekhari, S., Abdi, E. (2021). A corrosion failure analysis of heat exchanger tubes operating in petrochemical refinery. Eng. Fail. Anal. 119, 105011. https://doi.org/10.1016/j.engfailanal.2020.105011

Situmorang, R.S., Kawai, H. (2018). Investigating the mechanism behind 'ant nest'corrosion on copper tube. Materials 11 (4), 533. https://doi.org/10.3390/ma11040533 PMid:29601522 PMCid:PMC5951379

Tait, W.S. (2018). Electrochemical corrosion basics. In Handbook of environmental degradation of materials. Chapter 5, William Andrew Publishing, pp. 97-115. https://doi.org/10.1016/B978-0-323-52472-8.00005-8

Vazdirvanidis, A., Papadopoulou, S., Papaefthymiou, S., Pantazopoulos, G., Skarmoutsos, D. (2019). Failure investigation of Cu-DHP tubes due to ant-nest corrosion. Int. J. Struct. Integr. 10 (3), 325-336. https://doi.org/10.1108/IJSI-09-2018-0056

Vazdirvanidis, A., Papadopoulou, S., Papaefthymiou, S., Pantazopoulos, G., Skarmoutsos, D. (2018). Copper tubing failure due to ant-nest corrosion. MATEC Web Conf. 188, 03005. EDP Sciences. https://doi.org/10.1051/matecconf/201818803005

Wallinder, I. O., Zhang, X., Goidanich, S., Le Bozec, N., Herting, G., Leygraf, C. (2014). Corrosion and runoff rates of Cu and three Cu-alloys in marine environments with increasing chloride deposition rate. Sci. Total Environ. 472, 681-694. https://doi.org/10.1016/j.scitotenv.2013.11.080 PMid:24321319

Zhao, Y., Mirzaeifar, R. (2021). Investigating the flow induced corrosion of copper in chloride-containing solution at the atomistic scale. Appl. Surf. Sci. 538 (5), 147925. https://doi.org/10.1016/j.apsusc.2020.147925

Zhou, J., Yan, L., Tang, J., Sun, Z., Ma, L. (2018). Interactive effect of ant nest corrosion and stress corrosion on the failure of copper tubes. Eng. Fail. Anal. 83, 9-16. https://doi.org/10.1016/j.engfailanal.2017.09.013