Cryogenic Testing.pdf - Jotun

Testing Report
Confidential Page 1 of 3
Product Test Report Cryogenic Testing of Jotatemp 650
Product Jotatemp 650
Test Test procedure to demonstrate thermal shock and thermal cycling
performance properties
Test Method Coating testing of Jotatemp 650 for applications where temperature
dip to -185ºC (-300ºF) with thermal shock to boiling water 100ºC
(212ºF), This report provides summary of a short term and long
term test.
Reason for Test
Technician
Determine acceptability of Jotatemp 650 for use on cryogenic/high
temperature operating equipment.
This test procedure was performed under contract by the Cryogenic
Institute of New England, Inc.
Test Panel Preparation: Test panels for Cryogenic testing consisted of 1/8” x 4” x 8” Type 304 L
stainless steel. These panels were prepared by solvent cleaning with an alkaline cleaner in
accordance with SSPC SP1 (solvent cleaning). Jotatemp 650 was properly mixed and then two
coats of the paint were applied. Panels for the initial short term test received and average 6 mils
(175 microns) Dry film thickness. The panels prepared for the second long term test received an
average 5-7 mils (125 -175 microns) dry film thickness in two applications. All of the panels were
allowed to ambient cure for 7 days prior to testing. Several were exposed to a hot environment of
204ºC (400ºF). Heat exposed and ambient cured panels were used for sort term test. While
panels for the Long term test were not heat exposed.
Testing Equipment: Testing equipment consisted of the following equipment;
• CDS Model #16 Cryogenic Freezer System, Closed loop Chamber with Auto-Temperature Set,
Method: Liquid Nitrogen Flashing in Chamber. An external thermocouple was placed in the test
chamber to verify correct temperature readings.
• Cryogenic Processor Model 701 by “300 Below Icon”. An external thermocouple was placed
in the test chamber to verify correct temperature readings.
• Hot plate equipped with Pyrex glass with cover for boiling water bath observation
Short-Term Test: Model 701 This testing consisted or placing a prepared test panel at ambient
temperature, 22ºC (72ºF) into the pre-chilled chamber set at -100ºC (-148ºF). The panels were
placed flat on the bottom with cardboard in between each panel in the stack. Prior to testing the
samples were conditioned overnight at -100ºC (-148ºF).
1

Confidential Page 2 of 3
Model 16 SSB The cryogenic freezer started with an initial set point of -100℃ (-148℉) then
ramped to -150℃ (-248℉). Panels were placed in the chamber vertically with the unpainted side
against the thermal transfer source. Testing Procedure and Results: The test consisted of 4
cycles with different samples for each unit. Each cycle included placing the chilled panel into
boiling water for 5 minutes. Once the panel was placed in the boiling water, the water returned
to a boil within 15-30 seconds. While transfer time was 5-10 seconds. The panels were placed
back into the cryogenic freezer for 5 hours, which was then followed by a subsequent cycle.
Ramp time to reach the lowest temperature was between 15 and 20 seconds. Panels were
visually evaluated after each cycle and found to be acceptable. After completion of all 4 cycles,
each panel was allowed to return to ambient temperature and then was subjected to both visual
and adhesion inspection. Adhesion of each panel is determined by probing to determine
similarity to initial cured conditions. No changes in probing characteristics resulted in a passed
or acceptable condition. This test was conducted September 6, 2006.
Long-Term Test: Air-cured panels were placed in a pre-cooled cryogenic chamber Model 701
starting at ambient temperature (72° F/ 22° C). Two panels were prepared as described above and
allowed to air dry for 5 days. One panel was scribed vertically (50% of panel). Starting on
Monday the temperature in the chamber was programmed to achieve -100℉(-75℃) this
temperature remained constant for 3 days (Tuesday to Thursday). Starting on Friday the program
reduced the chamber temperature –149ºC (-300℉) and remained for 24 hours and started to
increase the temperature to ambient within 24 hours through Sunday and by Monday morning
back to ambient. This completed a one (1) week cycle. Each Thursday the panels were removed
from the chamber -73ºC (-100℉) and placed into boiling water for 5-10 minutes then returned to
the chamber, for a total of (4) cycles. The third and forth week of the test panels were removed
from the chamber on Tuesday -73ºC (-100℉) and placed into a dry oven, set at 163ºC (325℉) for
one (1) hour, then returned to the chamber at -73ºC (-100℉), for a total of two (2) cycles. Upon
completion of the 4 week test, panels were analyzed using a stereomicroscope. Both
panels passed this test with the same results as the short term testing. This test was
completed February 2, 2007.
Conclusions: Jotatemp 650 performed well considering the severity of rapid thermal
shock (total range of 250°C (450° F) in 30 seconds) for both the Short & Long Term test
conditions produced. The coating hardness and adhesion at -150° C (-238ºF) is good.
Both heat exposed ambient cured coating systems demonstrate matched coefficient of
expansion with the substrate, with acceptable recovery at cryogenic -150° C (-238ºF) and
elevated temperature temperatures above 177ºC (350℉).
2

Confidential Page 3 of 3
3