Influence of seawater salinity on corrosion of hull structural steel

• Autorzy: Zagożdżon Paweł , Starosta Robert

Identyfikatory

DOI

10.2478/kones-2019-0049

• Języki publikacji: EN

Abstrakty

EN

Hulls of ships are often made of steel, which are produced under the supervision of classification societies. Usually, the hull steel of ordinary strength category A is used for the ship's shell (the yield strength is 235 MPa and the impact strength 27 J at 20ºC). Vessels sail in sea areas with various levels of salinity and thus with different corrosiveness. The average salinity of the seas is taken as 3.5% content of sodium chloride. This article presents the results of corrosion tests of S235 JRG1 steel in an aqueous solution in which the mass fraction of sodium chloride was: 0.7%, 1.4%, 2.2%, 2.8%, 3.5% and 4.2%. Corrosion tests were performed using the potentiodynamic method. As parameters characterizing the corrosion properties of the tested steel, the corrosion current density and corrosion potential were assumed. Statistically significant influence of seawater salinity on the corrosion properties of hull structural steel of ordinary strength of category A was found. The highest value of the corrosion current density was observed in the solution containing 3.5% NaCl mass fraction was observed. In seawater with a sodium chloride content in the range of 0.7 to 3.5%, an increase in the value of the corrosion current density was observed, along with the increasing share of NaCl. In seawater with higher salinity, the corrosion rate was reduced. The corrosion potential of S235JRG1 steel decreases with the NaCl content in the corrosive solution. The susceptibility of this material to corrosion in seawater increased.

Słowa kluczowe

EN

hull structural steel; corrosion; potentiodynamic test; seawater

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2019
• Tom: Vol. 26, No. 2
• Strony: 189--195
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Zagożdżon Paweł

• Gdynia Maritime University, Faculty of Marine Engineering Marine Maintenance Department Morska Street 81-87, 81-225 Gdynia, Poland tel.:[phone], fax: [phone]

autor

Starosta Robert

• Gdynia Maritime University, Faculty of Marine Engineering Marine Maintenance Department Morska Street 81-87, 81-225 Gdynia, Poland tel.:[phone], fax: [phone]

Bibliografia

• [1] Charchalis, A., Starosta, R., Effect of finishing on the corrosion properties of flame sprayed Ni-5%Al and Ni-5%Al-Al2O3 coatings, Journal of KONES Powertrain and Transport, Vol. 21, No. 4, pp. 29-36, 2014.
• [2] Cicholska, M., Czechowski, M., Materiałoznawstwo okrętowe, Wydawnictwo Akademii Morskiej, Gdynia 2013.
• [3] Jurczak, W., Ochrona antykorozyjna morskich jednostek pływających, TTS Technika Transportu Szynowego, Vol. 23, No. 12, pp. 310-316, 2016.
• [4] Przepisy Klasyfikacji i budowy statków morskich. Część II, kadłub, Wyd. Polski Rejestr Statków, Gdańsk 2018.
• [5] Przepisy Klasyfikacji i budowy statków morskich. Część IX, materiały i spawanie, Wyd. Polski Rejestr Statków, Gdansk 2018.
• [6] Refait, Ph., Grolleau, A. M., Jeannin, M., Francois, E., Sabot, R., Localized corrosion of carbon steel in marine media: Galvanic coupling and heterogeneity of the corrosion product layer, Corrosion Science, Vol. 111, pp. 583-595, 2016.
• [7] Refait, Ph., Grolleau, A. M, Jeannin, M., Francois, E., Sabot, R., Corrosion of mild steel at the seawater/sediments interface: Mechanisms and kinetics, Corrosion Science, Vol. 130, pp. 76-84, 2018.
• [8] Starosta, R., The quantitative analysis of the effect of the porosity, the volume of fraction of reinforcing phase and the thermal spraying methods, on corrosion properties of composite coatings in marine environment, Journal of KONES Powertrain and Transport, Vol. 23, No. 1, pp. 321-327, 2016.
• [9] Qu, Q., He, Y., Wang, L., Xu, H., Li, L., Chen, Y., Ding, Z., Corrosion behavior of cold rolled steel in artificial seawater in the presence of Bacillus subtilis C2, Corrosion Science, Vol. 91, pp. 321-329, 2015.
• [10] Woźniak, P., Starosta, R., Corrosive properties of multi -groove pads hardfacing with the MIG method, Proceedings of 27th International Conference on Metallurgy and Materials, pp. 910-917, Brno 2018.

Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).