Effect of a Simulated Butterfly Valve on the Erosion-Corrosion Rate of Nickel Aluminum Bronze Alloys in Highly Turbulent Seawater

Simple item page
dc.contributor.authorTaylor, Ryan Chandleren
dc.contributor.committeechairHendricks, Robert Wayneen
dc.contributor.committeememberReynolds, William T. Jr.en
dc.contributor.committeememberCorcoran, Sean G.en
dc.contributor.departmentMaterials Science and Engineeringen
dc.date.accessioned2018-06-30T08:02:33Zen
dc.date.available2018-06-30T08:02:33Zen
dc.date.issued2018-06-29en
dc.description.abstractNickel aluminum bronze (NAB) alloys are used in naval and maritime applications for their excellent corrosion resistance under the influence of seawater. One application involves the use of a NAB butterfly valve within a NAB fluid line to control fluid flow of seawater. Due to the chaotic environment, the corrosion rate of the NAB tubing downstream from the valve increases significantly. The disc angle at which the valve alters fluid flow causes an increase in the fluid velocity and an increase in the turbulence produced on the downstream side of the valve. These fluid conditions contribute to the increase in the corrosion rate of the NAB piping downstream from the valve. This thesis aims to characterize how the change in the disc angle of the butterfly valve causes a change in the erosion-corrosion rate of NAB downstream from the valve. A butterfly valve is simulated using orifice plates of varying diameters to mimic flow conditions at different disc angles. An orifice plate is a simple device with a hole in its center that is designed to restrict fluid flow across a fluid line. Under the same hydrodynamic conditions, the orifice produces nearly the exact same flow coefficients as the valve. At a volumetric flowrate of 0.00757 m^3/s a total of eight locations found along the liquid/metal interface produced pitting sites. The average passivation layer thickness is also measured.en
dc.description.degreeMaster of Scienceen
dc.format.mediumETDen
dc.identifier.othervt_gsexam:15464en
dc.identifier.urihttp://hdl.handle.net/10919/83818en
dc.publisherVirginia Techen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectCavitationen
dc.subjectcorrosion loopen
dc.subjecterosion-corrosionen
dc.subjectnickel aluminum bronzeen
dc.subjectseawater corrosionen
dc.subjectTurbulenceen
dc.titleEffect of a Simulated Butterfly Valve on the Erosion-Corrosion Rate of Nickel Aluminum Bronze Alloys in Highly Turbulent Seawateren
dc.typeThesisen
thesis.degree.disciplineMaterials Science and Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Taylor_RC_T_2018.pdf
Size:
1.44 MB
Format:
Adobe Portable Document Format
Download

Collections

Masters Theses