Corrosivity of the atmosphere on corrosion test stations of Vietnam tropical center. Part 2. Evaluation of atmospheric corrosivity towards typical metals

The results of four-year tests of typical metals (K^exp) with specimens exposed top side up in two directions at three corrosion stations (CS) in Vietnam were used. Using the doseresponse functions FDOS and FDON for CS, the first-year corrosion losses of metals (K^pr) were determined. The obtained K^pr values were used to estimate the corrosivity of CS atmospheres with respect to typical metals. Comparisons of the estimated corrosivity categories with experimental K^exp values demonstrated fairly good comparability for steel and zinc using FDOS and FDON. For copper there is no comparability between the categories using both models, and for aluminum, category comparability was obtained only using FDON. In steel, zinc, and copper FDON adjustments were made to the temperature coefficients to achieve the absolute comparability between the estimated atmospheric corrosivity categories based on K^pr with categories determined using K^exp. It is shown that the adjustments of temperature coefficients is of a private nature only for the Vietnam CS and requires verification for application in other places.

1. ISO 9223:2012(E). Corrosion of metals and alloys – Corrosivity of atmospheres – Classification, determination and estimation, International Standards Organization, Geneve, 2012.

2. B. Marteinsson and J. Sigurjónsson, The Icelandic Building Research Institute Keldnaholt Iceland, Corrosion оf Metals – Mapping оf The Environment In Iceland. 9DBMC-2002, Paper 029.

3. Yu.M. Panchenko, A.I. Marshakov, L.N. Nikolaeva and T.N. Igonin, Development of models for the prediction of first-year corrosion losses of standard metals for territories with a coastal atmosphere in various climatic regions of the world, Corros. Eng., Sci. Technol., 2020, 55, no. 8, 655–669. doi: 10.1080/1478422X.2020.1772535

4. J. Tidblad, V. Kucera, A.A. Mikhailov, J. Henriksen, K. Kreislova, T. Yaites, B. Stöckle and М. Schreiner, Final Dose-Response functional froms the UN ECE Project jn Effects of Acid Deposition affer 8 Years of Exposure. 14th International Corrosion Congress “Co-operation in Corrosion Control”. CD Proceedings. Cape Town. South Africa. September 1999.

5. M. Morcillo, Atmospheric corrosion in Ibero-America. The MICAT project. In Atmospheric Corrosion; Kirk, W.W., Lawson, H.H., Eds.; ASTM STP 1239; American Society for Testing and Materials: Philadelphia, PA, USA, 1995, 257–275

6. J. Tidblad, A.A. Mikhailov and V. Kucera, Acid Deposition Effects on Materials in Subtropical and Tropical Climates. Data Compilation and Temperate Climate Comparison; KI Report 2000:8E; Swedish Corrosion Institute: Stockholm, Sweden, 2000; 1–34.

7. Ю.М. Панченко, Л.А. Шувахина и Ю.Н. Михайловский, Атмосферная коррозия металлов в районах Дальнего Востока, Защита металлов, 1982, 18, № 4, 575–582.

8. М.Г. Абрамова, Ю.М. Панченко, Е.Ю. Ветрова и Т.А. Ненашева, Коррозионная агрессивность атмосферы в различных климатических районах РФ, Коррозия: материалы, защита, 2020. № 3, 12–22 doi: 10.31044/1813-7016-2020-0-3-12-22

9. Н.Г. Ануфриев и Ю.А. Кузенков, Коррозивность тропической атмосферы Южного Вьетнама, Практика Противокоррозионной Защиты, 2022. 27, № 4, 7–18. doi: 10.31615/j.corros.prot.2022.106.4-1

10. Yu.M. Panchenko, A.I. Marshakov, T.N. Igonin, T.A. Nenasheva, L.A. Nikolaeva and A.A. Ivanenko, Corrosion Resistance of Zinc and Zinc-Aluminum-Magnesium Coatings in Atmosphere on the Territory of Russia, Mater., 2023, 16, 5214. doi: 10.3390/ma16155214

11. Yu.M. Panchenko, A.I. Marshakov, L.A. Nikolaeva and T.N. Igonin, Corrosion resistance of structural metals depending on the sample orientation and initial exposure conditions in coastal and rural atmospheres. Part 1. Corrosivity toward structural metals at coastal and rural test sites under various exposure conditions, Corros. Eng., Sci. Technol., 2023, 58, no. 7, 645–658. doi: 10.1080/1478422X.2023.2245642

12. В.А. Карпов, В.Н. Ивонин, Т.М. Тиен, О.Л. Михайлова, Ю.Л. Ковальчук, Ф.З. Нам и Х.Х. Шон, Определение коррозивности атмосферы на испытательных станциях Тропического центра и в некоторых районах Вьетнама, Коррозия: материалы, защита, 2014, № 9, 1–7.

13. В.Д. Вуй, П.В. Стрекалов, Ю.Н. Михайловский, Д.Т. Бинь и А.А. Михайлов, Коррозионная стойкость сталей, цинка, меди, алюминия и сплавов во влажных тропиках Вьетнама. Результаты пятилетних испытаний, Защита металлов, 1994, 30, №5, 502–509.

14. L.T.H. Lien, P.T. San and H.L. Hong, Results of studying atmospheric corrosion in Vietnam 1995–2005, Sci. Technol. Adv. Mater., 2007, 8, 552–558. doi: 10.1016/j.stam.2007.08.011