Corrosion of selected hard facing materials exposed to mine water

dc.contributor.authorHango, Silas I.
dc.contributor.authorChown, L.H.
dc.contributor.authorVan der Merwe, J.W.
dc.contributor.authorKavishe, Frank P.
dc.contributor.authorCornish, L.A.
dc.date.accessioned2014-11-25T10:45:24Z
dc.date.available2014-11-25T10:45:24Z
dc.date.issued2014
dc.description.abstractCorrosion damage can cause major failure of mining pumps which could lead to degradation of other mining equipment, as a result of leakage, thus leading to a high rate of replacement and maintenance of pumps and surrounding equipment. Hard facing materials are used to protect moving parts against mechanical and corrosion damage. The corrosion behavior of a corrosion resistant Hastelloy G30 and a hard facing material, a nickel-chromium-iron (Ni-Cr-Fe) alloy (both high chromium nickel-based alloys) exposed to synthetic and acidified mine water were studied using potentiodynamic polarisation. The results showed lower corrosion rates for Hastelloy G30 than for Ni-Cr-Fe. The corrosion rates at pH 6.8, at ambient temperature and 35 C were 0.00011 mm.y−1 and 0.00035 mm.y−1 for Hastelloy G30; 0.0016 mm.y−1 and 0.0017 mm.y−1 for INCONEL Alloy 600, and at pH 3, at ambient temperature and 35 C corrosion rates were 0.0003 mm.y−1 and 0.00083 mm.y−1 for Hastelloy G30; 0.1 mm.y−1 and 3.2 mm.y−1 for INCONEL Alloy 600. The microstructures of the alloys before and after corrosion tests were characterised using optical microscopy; X-ray diffraction (XRD), and microhardness measurements were also performed.en_US
dc.identifier.citationHango, S.I., Chown, L.H., Van der Merwe, J.W., Kavishe, F.P.L. & Cornish, L.A. (20014). Corrosion of selected harxd facing materials exposed to mine water. International Science & Technology Journal of Namibia. 4, 90-105.en_US
dc.identifier.issn20267673
dc.identifier.urihttp://hdl.handle.net/11070/1305
dc.language.isoenen_US
dc.publisherUniversity of Namibiaen_US
dc.subjectCorrision damageen_US
dc.subjectCorrision resistant hastelloyen_US
dc.subjectSynthetic mine wateren_US
dc.subjectHard facing materialsen_US
dc.titleCorrosion of selected hard facing materials exposed to mine wateren_US
dc.typeArticleen_US
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