Corrosion of Carbon Steel in Soils of Varying Moisture Content
N. N. Glazov, S. M. Ukhlovtsev, I. I. Reformatskaya,
A. N. Podobaev, and I. I. Ashcheulova
Karpov Institute of Physical Chemistry, Vorontsovo Pole 10, Moscow, 105064 Russia
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Received March 18, 2005
Abstract — Electrochemical equipment, which enables one to study the processes of underground corrosion under conditions of differential aeration of soils, with no limitation of the experiment duration at a fixed position of the interface boundary and controlled moisture content, is developed. The character and rate of the corrosion process can be predicted by comparing the metal potentials with the polarization curves recorded in soil electrolytes at pH values typical of the near-electrode soil layer. The usage of solely gravimetric technique in studying the above corrosion processes may provide wrong results.
PACS numbers: 81.65.Kn, 82.45.Bb, 07.05.Fb
DOI: 10.1134/S0033173206060130
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827 and 
-85 Nickel Alloys 
827 and 
-85 nickel alloys was investigated in a temperature range of 773 to 1173 K and exposure time of 1 to 50 h in the MgCl2–KCl–NaCl ternary eutectic and oxidation in air (at 873 to 1273 K for 500 h). The ChC is intergranular, intensely develops starting from a temperature of 973 K, and results in softening due to the strong extraction of chromium and aluminum from the base alloy. Other things being equal, the ChC rate exceeds the oxidation rate in air by two to three orders of magnitude.