The use of scanning vibrating electrode technique to evaluate the effect of hot stamping on the corrosion resistance of 22MnB5 press-hardened steel electroplated with Zn-Ni
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Carmakers must achieve the worldwide targets for lightweight materials, safety and reducing the
fuel consumption. The use of press-hardened steel (PHS), in vehicle structures has been contributing
with these requirements. This type of steel is widely used for the hot-stamping which consists in heating
the steel blank to total austenitization temperature and then transferring it from the furnace into the
die tool where the steel is formed and quenched at the same time. PHS is usually protect with metallic
coatings in order to avoid both steel oxidation and decarburization. Hot-dip Al-Si coating is currently
the main used in this application. However, alternative coatings, like zinc-based, are under investigation.
This work aims at evaluating the corrosion resistance of the 22MnB5 grade PHS, electroplated with
Zn-Ni, before and after hot stamping, using the scanning vibrating electrode technique (SVET). Results
from SVET showed that samples prior to hot stamping, the corrosion mechanism was uniform over
the exposed surface, and was mainly related to selective dissolution of zinc from the coating. On the
other hand, hot stamped samples showed localized corrosion mechanism with decrease in current with
time of immersion due to the formation of corrosion products on the exposed surface.
Como referenciar
COUTO, CAMILA P.; COSTA, ISOLDA; VIVEIROS, BARBARA V.G. de; ALENCAR, MAICON C. de; COLOSIO, MARCO A.; PANOSSIAN, ZEHBOUR; ROSSI, JESUALDO L. The use of scanning vibrating electrode technique to evaluate the effect of hot stamping on the corrosion resistance of 22MnB5 press-hardened steel electroplated with Zn-Ni. Materials Research, v. 22, p. 1-6, 2019. suppl. 1. DOI: 10.1590/1980-5373-MR-2019-0163. Disponível em: http://repositorio.ipen.br/handle/123456789/31340. Acesso em: 30 Apr 2026.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.