Enhancement of the resistance to localized corrosion of type 304 borated stainless steels through hot rolling
Heon‐Young Ha, Jae Hoon Jang, Tae‐Ho Lee, Sung‐Dae Kim, Chang‐Hoon Lee, Joonoh Moon
Abstract
The microstructures of Febalance-18Cr-12Ni-1.5Mn-0.07C (in wt%) alloys containing 0.2–1.76 wt% B were controlled through hot rolling of 60% and 96%. It was found that refining the microstructure through additional hot rolling helped to form a stable passive film and accelerate passivation. Passive film formed on the 96% hot-rolled BSS exhibited higher electrical resistant than that of the 60% hot-rolled BSS, and Cr-enriched passive film was formed on the 96% hot-rolled BSS. As a result, refining the microstructure increased Epit and Erp, and reduced metastable pit events and passive current density.
Topics & Concepts
MicrostructurePassivationRefining (metallurgy)MetallurgyMaterials scienceCorrosionMetastabilityHot rolledComposite materialLayer (electronics)ChemistryOrganic chemistryHydrogen embrittlement and corrosion behaviors in metalsMicrostructure and Mechanical Properties of SteelsWelding Techniques and Residual Stresses