Improving reliability and functional sustainability of groundwater handpumps by coating the rubber piston seals with diamond-like carbon

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dc.contributor.authorLubwama, Michael
dc.contributor.authorCorcoran, Brian
dc.contributor.authorKirabira, John Baptist
dc.contributor.authorSebbit, Adam
dc.contributor.authorSayers, Kimmitt
dc.date.accessioned2022-11-30T16:40:47Z
dc.date.available2022-11-30T16:40:47Z
dc.date.issued2015
dc.descriptionChapter 9, Page 137en_US
dc.description.abstractIn many rural communities, handpumps are essential in order to provide access to safe drinking water from groundwater sources. The functional sustainability of handpumps is poor, however, and most maintenance issues in handpumps are caused by wear of the nitrile rubber piston seals. This study identified handpump problems faced by a rural community in southern Uganda, specifically related to wear of piston seals. We investigated a novel surface-engineering approach to improve the wear resistance of piston seals by depositing diamond-like carbon (DLC), and silicon (Si) doped DLC onto the seals. Wear mechanisms for the coated seals were determined using a piston seal wear test rig. Tests were undertaken with clean normal water, and water seeded with sand particles. Wear mechanisms identified included adhesion, abrasion, and fatigue. For the DLC and Si-DLC coated piston seals the dominant wear mechanism was abrasion, with minimal fatigue wear. Adhesive wear on the coated piston seals is explained by the generation and transfer of a tribo-layer, which increases wear resistance and functional sustainability of the piston seal. Wear resistant seals could significantly reduce the maintenance costs of existing handpump designs, and improve their functional sustainability.en_US
dc.identifier.citationLubwama, M., Corcoran, B., Baptist, J., Kirabira, A. S., & Sayers, K. (2015). Improving reliability and functional sustainability of groundwater handpumps by coating the rubber piston seals with diamond-like carbon. Honor, 125. http://dx.doi.org/10.3362/9781780448893.009en_US
dc.identifier.isbn9781780448909
dc.identifier.urihttps://nru.uncst.go.ug/handle/123456789/5579
dc.language.isoenen_US
dc.publisherHonoren_US
dc.subjectFunctional sustainabilityen_US
dc.subjectHandpumpsen_US
dc.subjectNitrile rubberen_US
dc.subjectPiston sealsen_US
dc.subjectWear mechanismsen_US
dc.titleImproving reliability and functional sustainability of groundwater handpumps by coating the rubber piston seals with diamond-like carbonen_US
dc.typeBook chapteren_US
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