Artigo de peri??dico
Influence of austenitisation temperatures during hot stamping on the local electrochemical behaviour of 22MnB5 steel coated with hot-dip Al-Si
Registration in:
0010-938X
190
10.1016/j.corsci.2021.109673
0000-0002-8304-9939
0000-0002-4987-3334
86.84
89.67
Author
COUTO, CAMILA P.
REVILLA, REYNIER I.
POLITANO, RODOLFO
COSTA, ISOLDA
PANOSSIAN, ZEHBOUR
GRAEVE, IRES de
ROSSI, JESUALDO L.
TERRYN, HERMAN
Abstract
Scanning Kelvin probe force microscopy was used to evaluate the effect of austenitisation temperatures during hot stamping on the local electrochemical behaviour of 22MnB5 steel coated with hot-dip Al-Si. A variation in the austenitisation temperature around 50 ??C substantially altered the coating morphology as well as the local electrochemical behaviour of the system (coating/steel). Both coating layer and steel substrate became nobler as the austenitisation temperature increased. The former was due to the overall iron enrichment while the latter was related to the microstructural transformation during quenching. Therefore, the driving force for cathodic protection decreased as the austenitisation temperature increased. Coordena????o de Aperfei??oamento de Pessoal de N??vel Superior (CAPES) Conselho Nacional de Desenvolvimento Cient??fico e Tecnol??gico (CNPq) CAPES: 88881.189691/2018-01 CNPq: 205368/2018-2