Effect of initial climatic and aerochemical exposure conditions on the corrosion resistance of structural metals in marine and non-marine atmospheres

• Yu.M. Panchenko¹, M.A. Gavryushina^1,2 and A.I. Marshakov¹

¹ A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky pr. 31, 119071 Moscow, Russian Federation
² Gazprom VNIIGAZ LLC, Malookhtinsky prospect., 45, 195112 St. Petersburg, Russian Federation

Abstract: The paper presents the results of four-year exposures of samples of technically important metals (carbon steel, zinc, copper, aluminum) to marine and non-marine atmospheres conducted at the corrosion stations of A.N. Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences. The beginning of each exposure corresponded to the beginning of a year season. The samples were installed at the corrosion stations with their upper sides facing in different directions. It was shown that the first-year metal corrosion losses (C) depended significantly on both the orientation of the samples and one the season when sample exposure began. It was shown that the difference in C values depended on the corrosivity of the atmosphere of the season when the tests began. The effect of corrosivity parameters on the C value was estimated using the significance of the impact of atmospheric factors determined by the “random forest” algorithm. It was shown that in some cases, the use of “dose–response” functions over a large interval of C values or for certain corrosivity categories did not reliably predict the C values with acceptable errors. A more reliable prediction of C values can be obtained by the “random forest” algorithm.

Keywords: atmospheric corrosion, structural metals, sample orientation, dose–response function, “random forest” algorithm

Int. J. Corros. Scale Inhib., 2025, 14, no. 1, 300-320
doi: 10.17675/2305-6894-2025-14-1-19

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