from the conferences organized by TANGER Ltd. provisional website
The construction material during corrosion processes loses its properties, it causes deterioration of functions, loses its usefulness, applicability. One of the important aggressive environments in the building as well as agricultural, chemical and energetic industry is nitrogen, from which nitric acid may be formed. Due to high economic and also a good resistance to mechanical characteristics, good weldability and corrosion the 1.4162 steel is commonly used in industry as chemical, pulp cellulose industry, oil and gas industry, building industry. The aim of the research was to determine the corrosive wear of 1.4162 steel, corrosion resistance with ferritic-austenitic microstructure using the Huey test. The tested steel contains 0.03% C, 21.2% Cr, 1.42% Ni and 5.0% Mn. The samples were weighed before start of the corrosion processes and after them. Samples were kept in nitric acid 65% at temperature 332 K. The holding times of the samples in nitric acid were 48, 96, 144, 192, 240, 288, 336, 384 hours. The percentage of mass losses was determined by the weight method. Each sample was examined metallographically using an optical microscope and the surface roughness test using a profilometer. The test results were analyzed in order to determine the corrosion rate of steel in mm/year and g/m2 as well as percentage mass loss and determine the corrosion resistance in this environment. After corrosion of the steel, the roughness and mass loss has increased. Then it was confirmed that as the holding time in boiling nitric acid increases, corrosive wear increases.Keywords: Steel, stainless steel, corrosion, corrosion rate, roughness
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