The corrosion behavior of nano-meter embedded phase in Ti implanted H13 steel

Citation
Th. Zhang et al., The corrosion behavior of nano-meter embedded phase in Ti implanted H13 steel, SCI CHINA E, 42(6), 1999, pp. 623-630
Citations number
9
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Engineering Management /General
Journal title
SCIENCE IN CHINA SERIES E-TECHNOLOGICAL SCIENCES
ISSN journal
2095-0624 → ACNP
Volume
42
Issue
6
Year of publication
1999
Pages
623 - 630
Database
ISI
SICI code
2095-0624(199912)42:6<623:TCBONE>2.0.ZU;2-N
Abstract
On the SEM micrographs of Ti implanted H13 steel, a tree-branch-like struct ure can be observed. Further investigation with TEM shows that the newly fo rmed composition is a formation of nano-meter FeTi2 phase in Ti implanted l ayer. The layer with a relatively high corrosion resistance has been formed in Ti implanted H13 steel with this structure. The results of electrochemi cal measurement show that the corrosion current density decreases obviously with an increase of ion dose. The corrosion current density in Ti implante d steel with a dose of 1.3 x 10(18)/cm(2) is 8-20 times less than that of T i implanted steel with a dose of 6 x 10(17)/cm(2). The corrosion behavior o f Ti implanted steel with a dose of 6 x 10(17)/cm(2) could be further impro ved as the sample was annealed at 500 degrees C for 20 min and the corrosio n current density decreases by 48-80 times compared to that of non-implante d samples. The corrosion trace was not observed on the annealing sample by SEM, after multi-sweep cyclic voltammetry of 40 cycles were performed. This indicates that terrific corrosion resistance can be obtained after anneali ng for Ti implanted sample.