Corrosion of selected hard facing materials exposed to mine water
dc.contributor.author | Hango, Silas I. | |
dc.contributor.author | Chown, L.H. | |
dc.contributor.author | Van der Merwe, J.W. | |
dc.contributor.author | Kavishe, Frank P. | |
dc.contributor.author | Cornish, L.A. | |
dc.date.accessioned | 2014-11-25T10:45:24Z | |
dc.date.available | 2014-11-25T10:45:24Z | |
dc.date.issued | 2014 | |
dc.description.abstract | Corrosion 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.citation | Hango, 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.issn | 20267673 | |
dc.identifier.uri | http://hdl.handle.net/11070/1305 | |
dc.language.iso | en | en_US |
dc.publisher | University of Namibia | en_US |
dc.subject | Corrision damage | en_US |
dc.subject | Corrision resistant hastelloy | en_US |
dc.subject | Synthetic mine water | en_US |
dc.subject | Hard facing materials | en_US |
dc.title | Corrosion of selected hard facing materials exposed to mine water | en_US |
dc.type | Article | en_US |