Disbonding Apparatus for ASTM G1460 pages

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Disbonding Apparatus for ASTM G146
Automated Apparatus for Performing Hydrogen Induced Disbonding Tests for ASTM G146
Parr Instrument Company
has developed an automated reactor system capable
of attaining the conditions
necessary for treating
samples consisting of bimetallic plate typically used in
refinery high pressure/ high
temperature (HP/HT) hydrogen gas service.
The test temperature and
hydrogen gas pressure are
selected to simulate those
conditions found in refinery
hydrogen-containing environments. These typically
range from 14 to 20 MPa
hydrogen gas pressure and
temperature from 300 to
500 °C depending on actual
refinery service conditions
under consideration.
The purpose of this test
Layout view of Parr’s new Automated Apparatus for Performing Hydrogen Induced
scheme is to allow for comDisbonding Tests
parison of data among test
laboratories on the resisto assess the effects of material composition,
tance of bimetallic stainless alloy/steels to hydroprocessing methods, fabrication techniques, and
gen induced disbonding (HID). This test procedure
heat treatment as well as the effects of hydrogen
provides an indication of the resistance or susceppartial pressure, service temperature, and cooling
tibility, or both, to HID of a metallurgically bonded
rate. This testing regime is fully described in ASTM
stainless alloy surface layer on a steel substrate
Standard Practice G146.
due to exposure to hydrogen-containing gaseous
environments under HP/HT conditions.
The apparatus developed by Parr consists of a
high pressure, high temperature test cell made
This system can be used over a broad range of
from Inconel 625. Two gas booster pumps, one for
pressures, temperatures, cooling rates, and gasnitrogen and the other for hydrogen, are used for
eous hydrogen environments where HID could
pressurizing the test cell.
be a significant problem. These tests can be used