Corrosion behavior of borided AISI H13 hot work steel

The corrosion behavior of borided hot work steel H13 (AISI) in specific acid solutions (HCl 5 vol.%, H 2SO 4 5 vol.%, H 3PO 4 30 vol.%) was studied. Boriding was done by pack cementation. The corrosion behavior was evaluated by potentiodynamic polarization experiments and immersion corrosion tests....

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Veröffentlicht in:	Surface & coatings technology 2006-09, Vol.201 (1), p.19-24
Hauptverfasser:	Kariofillis, George K., Kiourtsidis, Grigoris E., Tsipas, Dimitrios N.
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Boriding Corrosion Corrosion environments Crevice corrosion Cross-disciplinary physics: materials science rheology Exact sciences and technology Galvanic coupling Heat treatment Materials science Metals. Metallurgy Other topics in materials science Physics Pitting Production techniques Thermochemical treatment and diffusion treatment
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Zusammenfassung:	The corrosion behavior of borided hot work steel H13 (AISI) in specific acid solutions (HCl 5 vol.%, H 2SO 4 5 vol.%, H 3PO 4 30 vol.%) was studied. Boriding was done by pack cementation. The corrosion behavior was evaluated by potentiodynamic polarization experiments and immersion corrosion tests. The borided steel showed a better corrosion behavior in H 2SO 4 and H 3PO 4 environments for short exposure periods, up to about 100 h, when compared to H13 steel. On the contrary H13 steel presented a better corrosion resistance in HCl acid environment in comparison to the borided H13 steel. The main corrosion mechanisms in order of appearance were crevice corrosion observed in the coating, galvanic corrosion between coating and H13 steel substrate and pitting corrosion of the substrate.
ISSN:	0257-8972 1879-3347
DOI:	10.1016/j.surfcoat.2005.10.025