Influence of cryogenic treatments on the electrochemical behavior of two martensitic stainless steels

FLAMINI, DANIEL; TUCKART, WALTER ROBERTO; PRIETO, GERMÁN

Fiziko-Khimicheskaya Mekhanika Materialov

Consultants Bureau Plenum Publishing Corporation

Lugar: Nueva York; Año: 2021 vol. 57 p. 113 - 123

0430-6252

Cryogenic treatment is a useful method for improving the mechanical and tribologicalproperties of a wide range of materials, especially steels. However, results regardingthe effect of this treatment on the corrosion resistance are scarce, particularly in thecase of martensitic stainless steels. In this research, the influence of cryogenic treatments on the properties of two different martensitic stainless steels, namely AISI 420and AISI 440C, is investigated. Their microstructures are studied by scanning electronmicroscopy and X-ray diffraction and correlated with their corrosion resistance. Theelectrochemical behavior of the steels is studied by measuring open-circuit potentialand under experiments using cyclic anodic potentiodynamic polarization. It is foundthat the cryogenic treatment does not affect the pitting resistance of AISI 420 steel,but it significantly reduces the ability of AISI 440C to achieve passivation