Korrosionserscheinungen in strömenden Medien am Beispiel von Chemiepumpen

Abstract

Corrosion phenomena in flowing media, illustrated for chemical pumps. It is shown how centrifugal pumps in chemical plant are exposed to a complex superposition of (static and dynamic) mechanical and thermal stresses, of corrosion, erosion/abrasion and cavitation. Then examples of pump parts that have been operated under service conditions are shown to demonstrate appearance and origin of flow‐induced, erosion‐ and cavitation‐corrosion. Materials concepts are discussed that are able to avoid or reduce these phenomena. Several pump‐like test methods are introduced that permit selection of pump materials in accordance with the practical service conditions, where hydraulic, design, and materials criteria have to be optimized to guarantee long pump lives.

Erosionskorrosion an Kreiselpumpenbauteilen in partikelhaltigen Strömungen

“…Bei den fur die Abtragsmessungen gewahlten Werkstoffen handelt es sich um einen hochlegierten ferritischaustenitischen Stahlgul3,wie er unter den genannten Bedingungen in Pumpen haufig eingesetzt wird sowie um einen austenitischen Vergleichswerkstoff [8]. Tab.…”

Improving the corrosion and wear resistance of grey cast iron components by surface welding with duplex stainless steel using regulated gas metal arc welding: Influence of dilution on corrosion properties

“…Many mechanical parts for application in plant and offshore engineering or pump components are subjected to simultaneously occurring mechanical and corrosive loads [1][2][3]. Wear and corrosion, in the form of abrasion, erosion and also cavitation, determine the efficiency and the life cycle of the components significantly.…”