Mechanical and Microstructural Characterization of a New Corrosion Resistant Stainless Steel

Euroinvent ICIR 2018

Voiculescu, I.^1 ; Geant, V.^1 ; Stefnoiu, R.^1 ; Cotru, C.^1 ; Ciocoiu, R.^1 ; Ionescu, M.^2

POLITEHNICA University of Bucharest, 313 Splaiul Independenei, Bucharest

060042, Romania^1

SC IMA METAV SA, 67-77 Biharia street, Bucharest

013981, Romania^2

关键词: Chemical compositions;    Corroded surface;    Corrosion current densities;    Corrosion-resistant;    Experimental alloys;    Micro-structural characterization;    Rate of corrosions;    Saline solutions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/374/1/012018/pdf
DOI  :  10.1088/1757-899X/374/1/012018

来源: IOP

【 摘 要 】

The paper investigates the manner in which the chemical composition and delivery status of a new type of stainless steel, highly alloyed with Ni and Cr, affect mechanical properties, microstructure and corrosion resistance. The results obtained during the mechanical test (tensile, compression, Charpy test and micro-hardness) have revealed promising values. During the corrosion test, the preferential attack of the reagent (Aqua regia) located on the grain boundaries, inclusions or polyhedral precipitates have been observed. On the corroded surfaces, some localized pitting effects on grain boundaries have been revealed. The analyses of the parameter values recorded during the corrosion test revealed that the corrosion current density had a low value, comparable to that of other specific types of stainless steels. The actual Icorr(1.089 μA/cm2) value measured for the experimental alloy proves good resistance to corrosion in 3% NaCl saline solution. The estimated rate of corrosion presented acceptable values (0.011 mm/year).