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The effect of the angle of incidence on the aqueous corrosion of ion implanted M50 steel substrates

1992-04Journal article Open access
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dc.contributor.authorRangel, C. N.
dc.contributor.authorSimplício, M. H.
dc.contributor.authorConsiglieri, A. C.
dc.contributor.authorNielsen, B. R.
dc.contributor.authorTorp, B.
dc.contributor.authorTeixeira, Nuno
dc.contributor.authorAlves, J. G.
dc.contributor.authorSilva, M. F. da
dc.contributor.authorSoares, J. C.
dc.contributor.authorDodd, A.
dc.contributor.authorKinder, J.
dc.date.accessioned2013-12-11T15:53:06Z
dc.date.available2013-12-11T15:53:06Z
dc.date.issued1992-04
dc.description.abstractFollowing work on tantalum and chromium implanted flat M50 steel substrates, this work reports on the electrochemical behaviour of M50 steel implanted with tantalum and chromium and the effect of the angle of incidence. Proposed optimum doses for resistance to chloride attack were based on the interpretation of results obtained during long-term and accelerated electrochemical testing. After dose optimization from the corrosion viewpoint, substrates were implanted at different angles of incidence (15°, 30°, 45°, 60°, 75°, 90°) and their susceptibility to localized corrosion assessed using open-circuit measurements, step by step polarization and cyclic voltammetry at several scan rates (5–50 mV s-1). Results showed, for tantalum implanted samples, an ennoblement of the pitting potential of approximately 0.5 V for an angle of incidence of 90°. A retained dose of 5 × 1016 atoms cm-2 was found by depth profiling with Rutherford backscattering spectrometry. The retained dose decreases rapidly with angle of incidence. The breakdown potential varies roughly linearly with the angle of incidence up to 30° falling fast to reach -0.1 V (vs. a saturated calomel electrode (SCE)) for 15°. Chromium was found to behave differently. Maximum corrosion resistance was found for angles of 45°–60° according to current densities and breakdown potentials. Cr+ depth profiles ((p,γ) resonance broadening method), showed that retained doses up to an angle of 60° did not change much from the implanted dose at 90°, 2 × 1017 Cr atoms cm-2. The retained implantation dose for tantalum and chromium was found to follow a (cos θ)8/3 dependence where θ is the angle between the sample normal and the beam direction.por
dc.identifier.citationRangel CN, Simplício MH, Consiglieri AC, Nielsen BR, Torp B, Teixeira N, et al. The effect of the angle of incidence on the aqueous corrosion of ion implanted M50 steel substrates. Surf Coat Technol. 1992;51(1-3):483-8.por
dc.identifier.issn1879-3347
dc.identifier.urihttp://hdl.handle.net/10400.21/2990
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevierpor
dc.relation.publisherversionhttp://www.sciencedirect.com/science/article/pii/025789729290286Jpor
dc.subjectM50 steelpor
dc.subjectCorrosionpor
dc.subjectChromiumpor
dc.subjectTantalumpor
dc.subjectElectrochemical behaviourpor
dc.titleThe effect of the angle of incidence on the aqueous corrosion of ion implanted M50 steel substratespor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage488por
oaire.citation.startPage483por
oaire.citation.titleSurface and Coatings Technologypor
oaire.citation.volume51por
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor

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