High-Temperature Chloride Corrosion of Industrial 
827 and 
-85 Nickel Alloys
I. V. Oryshich
Frantsevich Institute of Material Science Problems, National Academy of Sciences of Ukraine,
ul. Krzizhanovskogo 3, Kiev, 252680 Ukraine
Received March 10, 2006
Abstract — High-temperature chloride corrosion (ChC) of 
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.
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.
PACS numbers: 81.65.Kn, 82.45.Bb
DOI: 10.1134/S0033173206060129