Determining the Corrosivity of Atmospheres, through the Weight Loss Method, According to ISO 9223

Abstract:

ISO 9223 can be used to categorize the corrosivity of atmospheres through either corrosion loss measurements or the use of environmental data. Although both methods are expected to give the same result, discrepancies have been found to occur. The present paper analyses this aspect of ISO 9223, focusing on the effects of metal composition, when using carbon steel, in corrosivity categorisation. Low and medium carbon steel were, therefore, exposed outdoors at one site in Mauritius to determine its atmospheric corrosivity. It was found that for medium carbon steel, the corrosivity obtained from corrosion loss results, through the weight loss method, was not in conformance with that obtained through the environmental data. This was not the case with low carbon steel. Taking into consideration the various factors affecting atmospheric corrosion, it was concluded that the carbon content of carbon steel is an important parameter that should be considered in ISO 9223 for more reliable determination of the corrosivity of atmospheres.

• Periodical: Advanced Materials Research (Volumes 433-440)
• Pages: 975-982
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.433-440.975
• Online since: January 2012
• Authors: B.Y.R. Surnam, C.V. Oleti
• Keywords: Atmospheric Corrosion, Carbon Steel, Component, Corrosivity, Weight Loss Method

References

[1] ISO 9223, Corrosion of metals and alloys - Classification of corrosivity of atmospheres, (1992).

[2] L. Veleva and L. Maldonado, Classification of atmospheric corrosivity in humid tropical climates., Br. Corros. J., 33(1), 1998, pp.53-57.

DOI: 10.1179/bcj.1998.33.1.53

[3] M. Natesan, G. Venkatachari and N. Palanisawmy, Corrosivity and durability maps of India., Corros. Prev. & Control June, 2005, pp.43-55.

[4] T.T.N. Lan, N.T.P. Thoa, R. Nishimura, Y. Tujino, M. Yokoi & Y. Maeda, Atmospheric corrosion of carbon steel under field exposure in the southern part of Vietnam, Corros. Sc., 48(1), 2006, pp.179-192.

DOI: 10.1016/j.corsci.2004.11.018

[5] J. Morales, S. Martin-Krijer, F. Diaz, J. Hernandez-Borges, S. Gonzalez, Atmospheric corrosion in subtropical areas: influences of time of wetness and deficiency of the ISO 9223 norm., Vol. 47(8), 2005, p.2005-(2019).

DOI: 10.1016/j.corsci.2004.09.005

[6] S.K. Roy & K.H. Ho, Corrosion of steel in tropical marine atmosphere, Br. Corros. J., 29(4), 1994, pp.287-291.

[7] L.L. Shreir, R.A. Jarman and G.T. Burstein, Corrosion Volume 1. Metal/Environment Reactions., 3rd Ed., Great Britain: Butterworth-Heinemann, 1994, p.1: 3-1: 15, 2: 31-2: 41.

[8] A.R. Mendoza and F. Corvo, Outdoor and indoor atmospheric corrosion of non-ferrous metals., Corros. Sc., Vol. 42, 2000, pp.1123-1147.

DOI: 10.1016/s0010-938x(99)00135-3

[9] BS EN ISO 8565, Metals and alloys: Atmospheric corrosion testing. General requirement for field tests., (1995).

[10] BS 7545, Method of removal of corrosion products from corrosion tests specimens of metals and alloys., (1991).

[11] M. Morcillo, S. Feliu & J. Simancas, Deviation from bilogarithmic law for atmospheric corrosion of steel., Br. Corros.J., Vol. 28(1), 1993, pp.50-52.

DOI: 10.1179/000705993798268278

[12] Feng-I Wei, Atmospheric corrosion of carbon steels and weathering steels in Taiwan., Br. Corros. J., 26(3), 1991, pp.209-214.

DOI: 10.1179/000705991798269215

[13] M. Benarie & F.L. Lipfert, A general corrosion function in terms of atmospheric pollutant concentrations and rain pH., Atmos. Environ., 20(10), 1986, p.1947-(1958).

DOI: 10.1016/0004-6981(86)90336-7

[14] M. Morcillo, B. Chico E. Otero and L. Maracia, Effect of marine aerosol on atmospheric corrosion., Mater. Perform., 38(4), 1999, pp.72-77.