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Adhesion Testing on a Zinc-Rich substrate,
of Rust Anode® and Rust Anode Primer®
IMPORTANT NOTICE
The following Test Report is translated into English without any approval
or support from LVM Technisol.
The French text of this document was translated to English, with the sole
purpose of convenience to an English audience.
To that effect, the English translation cannot be used as a legal document
and cannot be referred too, to bring any legal procedures against LVM
Technisol.
The Official French Test Report produced by LVM Technisol MUST
ALWAYS ACCOMPANY the unofficial English Report.
Adhesion Testing on a Zinc-Rich substrate, of Rust Anode® and Rust
Anode Primer®
Report
October 2008
Presented by LVM Technisol
Ref. #123-P017476-0500-CR-0001-00
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Adhesion Testing on a Zinc-Rich substrate, of Rust Anode® and Rust Anode Primer®
GALVATECH 2000
Adhesion Testing on a Zinc-Rich substrate, of Rust Anode®
and Rust Anode Primer®
Report
October 2008
Ref. #123-P017476-0500-CR-0001-00
Presented by
LVM Technisol
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Adhesion Testing on a Zinc-Rich substrate, of Rust Anode® and Rust Anode Primer®
GALVATECH 2000
Adhesion Testing on a Zinc-Rich substrate, of Rust Anode®
and Rust Anode Primer®
Report
Prepared by:
[Signature]
Raphaël Jacqmain-Laflamme, junior engineer
Approved by:
[Signature]
Bernard Perron, [B. Ens.]
Project manager, metallurgist
LVM Technisol
1200 Saint-Martin Blvd. West, Suite 300
Laval, QC H7S 2E4
Canada
Telephone: 514.281.5151
Fax:
450.668.5532
E-mail:
[email protected]
Website:
www.lvmtechnisol.com
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Adhesion Testing on a Zinc-Rich substrate, of Rust Anode® and Rust Anode Primer®
TABLE OF CONTENTS
1
INTRODUCTION…………………………………………………………………………5
2
SAMPLE PREPARATION……………………………………………………………….5
2.1 Original sample condition…………………………………………………………...6
2.2 Coating thickness measurements………………………………………………….7
3
ADHESION TESTING……………………………………………………………………8
4
ADHESION TEST RESULTS…………………………………………………………...9
5
CONCLUSION…………………………………………………………………………..10
Tables and figures
Table 1: Original condition of samples ……………………………………..................7
Table 2: Coating thickness measurements ……………………………………………7
This report contains (10) pages. It is the work of LVM Technisol and is legally protected as such. It is exclusively intended
for the herein mentioned purposes. Partial or total reproduction or adaptation is strictly prohibited without prior written
authorization from LVM Technisol and the client.
All results of any testing conducted are only valid for the samples described herein.
REVISIONS AND RELEASES REGISTRY
REVISION #
DATE
00
October 2008
DESCRIPTION OF MODIFICATION AND/OR RELEASE
Report release
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Adhesion Testing on a Zinc-Rich substrate, of Rust Anode® and Rust Anode Primer®
INTRODUCTION
This report describes the adhesion testing and its evaluation that LVM
Technisol conducted on Rust Anode® and Rust Anode Primer® products
per its mandate from Galvatech 2000. Those products were applied to
galvanized angle iron that was part of a Hydro Québec transmission
tower.
2
SAMPLE PREPARATION
The sample material used for adhesion testing was old hot dip galvanized
angle iron 2 ½’’ x 2 ½’’ x ¼’’ that was part of a Hydro Québec transmission
tower.
Samples were produced and prepared as follows:
1. Five samples approximately 6 inches long were cut;
2. Samples were hand washed under a low-pressure water jet without
brushing;
3. Samples were coated with a [DAKI]-type degreaser and then rinsed
in warm water;
4. Samples were dried at ambient air, room temperature;
5. Adhesive tape about 1 1/2 inches long was applied to the end of
each sample in order to retain a view of the original condition of the
angle iron;
6. Zinc-rich Rust Anode® (three samples) and Rust Anode Primer®
coatings (two samples) were applied.
Is worth noting that, apart from cleaning by hand and degreasing of
samples, no other surface preparation was performed before coating
application.
2
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Adhesion Testing on a Zinc-Rich substrate, of Rust Anode® and Rust Anode Primer®
In order to best distinguish the various samples based on their coating, the
following numbering system was used:
2.1
No.
Coating
Sample #1
Rust Anode®
Sample #2
Rust Anode®
Sample #3
Rust Anode®
Sample #4
Rust Anode Primer®
Sample #5
Rust Anode Primer®
Original sample condition
It is important to mention that, despite the apparent absence of
galvanization, coating thickness measurements made, did show that there
was still a residual coating of zinc.
In fact, the photos below show the regions in which the colour could
indicate the absence of galvanization.
Photo 1: Sample condition
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Adhesion Testing on a Zinc-Rich substrate, of Rust Anode® and Rust Anode Primer®
As presented in Table 1, zinc coating thickness measurements
demonstrate that there was an average of 3-3.5 mils residual
galvanization thickness.
Table 1: Average residual galvanization thickness
Sample # Galvanization
thickness
(mils)
1
3.65
2
2.73
3
3.61
4
3.06
5
3.31
2.2
Number of
measurements
10
10
10
10
10
Coating thickness measurements
After Mr. Rioux with Galvatech 2000 applied Rust Anode® and Rust
Anode Primer® in the week of September 7, 2008, coating thickness
measurements were taken to accurately determine the coating thickness
applied on the galvanization. Table 2 shows those measurements and the
average coating thickness.
Table 2: Coating thickness measurements
Sample #
1
2
3
4
5
1
5.1
5.6
6.1
6.2
5.7
Measurement (mils)
2
3
4
5
5.2 5.5 5.2 5.3
6 6.2 5.1 5.6
6.4 6.3 6.7 5.8
5.3 5.9 6.7 6.8
5.4 6.3 5.7 5.6
6 Average
5.4
5.28
6.3
5.80
5.5
6.13
6.1
6.17
5.9
5.77
Of course, it is necessary to consider that measured thicknesses not only
indicated the thickness of the coating that had just been applied but also
residual galvanization thickness. Therefore, by subtracting the Table 1
residual galvanization thicknesses, we obtained an applied coating
thickness between 2 and 2.5 mils. That data would be crucial in
conducting adhesion testing.
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Adhesion Testing on a Zinc-Rich substrate, of Rust Anode® and Rust Anode Primer®
ADHESION TESTING
Adhesion testing was performed in accordance with standard ASTM
D3359, Measuring Adhesion by Tape Test, which first specifies the
method to be used based on coating thickness. As mentioned above in
Section 2.2 of this report, Rust Anode® and Rust Anode Primer®
thicknesses varied from 2-2.5 mils.
The standard indicates that, for coating thicknesses between 2 and 5 mils,
the method used consists of scratching through the coating down to the
metal in six vertical lines 2 mm apart and six horizontal lines also 2 mm
apart crossing the vertical lines.
Then standardized adhesive tape (in accordance with the ASTM D3330
method) was applied to the crosscut surface and then quickly pulled off.
As demonstrated in the image below, the coating was then evaluated by
using a scale from 0 to 5, 0 meaning complete removal and 5 no removal.
Classification
Surface of cross-cut area from
which flaking as occurred.
(Example for six (6) level of
flaking)
5
None
4
3
2
1
0
Superior to 65%
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Adhesion Testing on a Zinc-Rich substrate, of Rust Anode® and Rust Anode Primer®
ADHESION TEST RESULTS
Technician Karine Allard conducted the adhesion testing on September
30, 2008.
The results presented in Table 3 show that Rust Anode® and Rust Anode
did not display any coating pull-off in adhesion testing.
Table 3: Adhesion test results
Sample #
Coating
1
2
3
4
5
Rust Anode®
Rust Anode®
Rust Anode®
Rust Anode Primer®
Rust Anode Primer®
ASTM
D3359
result
5
5
5
5
5
Furthermore, here is a picture of the results obtained on the two (2)
diffirent coatings when applied to hot-galvanized angle iron samples:
Picture : Rust-Anode®
6
Picture : Rust-Anode Primer®
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Adhesion Testing on a Zinc-Rich substrate, of Rust Anode® and Rust Anode Primer®
CONCLUSION
The adhesion testing conducted in accordance with standard ASTM
D3359 demonstrates that the zinc-rich coatings Rust Anode® and Rust
Anode Primer® provide excellent adhesion on hot-galvanized angle iron.
Furthermore, we must remember that no surface preparation
(sandblasting, etc.) was done before coating application. The angle iron
was only cleaned by hand and degreased.