Metallurgical Failure Analysis, Mark Douglas Bell, PE, Consulting Metallurgical Engineer, San Diego, California, USA Bell Metallurgy
Metallurgical Failure Analysis
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San Diego, California, 92130
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Mark Douglas Bell, PE
Consulting Metallurgical Engineer


Solids and fluids at high velocities will remove metal from the surface, that is erosion. Erosion corrosion also has metal loss due to corrosion. The synergistic effects of the erosion and corrosion cause metal loss faster than would be expected for either one by itself. An example of this is brass in a pump which will acceptably handle concentrations of chlorine in the range of 10 ppm. If excessive chlorine is added to the processed water before it was pumped, then there will be erosion/corrosion. Areas of higher fluid flow in the eye of the impeller and on the shroud will show a corresponding higher metal lost.

In instances of high erosion/corrosion hardfacing can be applied by welding.

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