Intergranular corrosion of AISI 316L steel
作者： Martin Matula , Ludmila Hyspecka , Milan Svoboda , Vlastimil Vodarek , Catherine Dagbert
DOI: 10.1016/S1044-5803(01)00125-5
关键词: Materials science 、 Metallography 、 Austenitic stainless steel 、 Laves phase 、 Corrosion 、 Microstructure 、 Grain boundary 、 Metallurgy 、 Intergranular corrosion 、 Carbide
摘要: Abstract The degree of sensitization (DOS) austenitic stainless steel AISI 316L to intergranular corrosion (IGC) was determined by means electrolytic etching in oxalic acid and electrochemical potentiokinetic reactivation (EPR) tests completed metallographic inspection. An analytical electron microscope, equipped with an energy-dispersive X-ray spectrometer, used examine the microstructure investigated, which had been annealed for 3.60×104 1.91×107 s at a temperature 650°C. kinetics precipitation secondary phases (M23C6 carbides, Laves phase Fe2Mo) were studied quantitative metallography. volume fractions chromium-rich M23C6 carbides along grain boundaries Fe2Mo matrix determined. Chromium concentration profile measurements across boundary, vicinity have performed using microscope. All results concerning microstructural changes quantitatively related IGC characteristics statistical normalization.
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