Browsing by Author "Capendale, A E"

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    The influence of water composition on the pitting behaviour of stainless steel
    (1985) Capendale, A E; Noel, R E J
    The new concept of hydropower has been found to be technically feasible in South African gold mines. Chilled mine service water is piped from the surface to deep level stope; where the hydrostatic pressure provides power for stoping machinery. This water varies widely in composition and acidity. High concentrations of sulphate, chloride and nitrate are present. These ions are derived from the leaching of oxidised sulphides from the broken rock, the fissure water and the dissolution of blasting fumes. In order to minimise the deterioration of stoping machinery by corrosion and synergistic corrosive abrasive effects, a compromise between selecting a suitable corrosion resistant material and treating the mine service water to an acceptable level of corrosiveness is being sought.