Electrochemical polishing of notches
- Scotia, NY
An apparatus and method are disclosed for the selective electrochemical polishing of a lateral tip of a deep longitudinal notch in a work piece used to test crack initiation properties of materials. A DC power source is connected to the work piece and to an electrode disposed laterally along the distal end of an insulated body which is inserted in the longitudinal notch. The electrode and distal end of the body are disposed along the tip of the notch, but are spaced from the notch so as to provide a lateral passage for an electrolyte. The electrolyte is circulated through the passage so that the electrolyte only contacts the work piece adjacent the passage. Conveniently, the electrolyte is circulated by use of an inlet tube and an outlet tube provided at opposite ends of the passage. These tubes are preferably detachably located adjacent the ends of the passage and suitable seals are provided. A holding device including arms to which the tubes are attached is conveniently used to rapidly and easily locate the test specimen with the passage aligned with the tubes. The electrode is preferably a wire which is located in grooves along the distal end of the insulated body and up one side of the body or a plastic sheath insulated thin metal strip.
- Research Organization:
- Knolls Atomic Power Laboratory (KAPL), Niskayuna, NY (United States)
- DOE Contract Number:
- AC12-76SN00052
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Number(s):
- US 4806216
- OSTI ID:
- 866849
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
polishing
notches
apparatus
method
disclosed
selective
lateral
tip
deep
longitudinal
notch
piece
crack
initiation
properties
materials
dc
power
source
connected
electrode
disposed
laterally
distal
insulated
inserted
spaced
provide
passage
electrolyte
circulated
contacts
adjacent
conveniently
inlet
tube
outlet
provided
opposite
tubes
preferably
detachably
located
suitable
seals
holding
device
including
arms
attached
rapidly
easily
locate
specimen
aligned
wire
grooves
plastic
sheath
metal
strip
dc power
power source
device including
located adjacent
electrode disposed
metal strip
electrochemical polishing
inlet tube
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