By A. G. Coombs
Read Online or Download Pump Technology: New challenges — where next? Churchill College, Cambridge, England 18–20 April, 1989 PDF
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Additional resources for Pump Technology: New challenges — where next? Churchill College, Cambridge, England 18–20 April, 1989
Sample text
The darnage to the surface arises from a similar mechanism to that of erosion by impact deformation, except that with cavitation the solid abrasive particles are replaced by microwaves which produce pitting fatigue, subsequent micro-fissures and metal removal. \BR BY FRICTION Wear by friction, or adhesive wear, can be defined as being that process which gives rise to lass of metal between two interacting surfaces as a result of adhesion of asperities in sliding or rolling contact. Wear by this mechanism is severe and can happen in the kinematic chain of a machine whenever there is an absence of lubrication at the interface of two bodies in contact.
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E. the impeller and wear plate. 4460, materials offering better resistance to hydroabrasive wear but with a slightly lower resistance to corrosion were used for these components in scrubber pumps in plants using the limestone suspension. 4460 with special heat treatment or NORILOY NL 25 2, a corrosion-resistant chilled cast iron with a ferrite-carbide structure was used. 5 ahd Cl' contents of ~ 60,000 ppm. If, during normal scrubber operation, these limit values are not attained, then there is a danger that on start-up of the FGD plant the levels will ei ther fall below or exceed these limi t values when the flue gas is fed into the water-filled scrubber and if the limestone suspension required for neutralisation is not added in the correct amount.