Evaluation of Griffolyn Corrosion Intercept
Background: Boris Miksic submitted two small samples of a 3-ply reinforced plastic laminate for evaluation of corrosion protection properties. The material, Corrosion Intercept, is manufactured by Griffolyn (a division of Reef Industries, Inc., in Houston, Texas). The company claims that Corrosion Intercept provides multimetal protection, protection from airborne gases and achieves very high barrier properties. They also claim that this materials protection abilities are unaffected by climatic conditions.
Purpose: Evaluate the corrosion protection abilities of the Corrosion Intercept material.
Methods: Razor Blade Test
SO2 Test
ASTM D 1748 (Humidity chamber)
Materials: Razor Blade Test Kit
SO2 Test Kit
Procedure: The above tests were performed according to standard procedures for each. Carbon steel panels were cut into smaller panels for the SO2 and humidity tests, and the panels were sealed inside of the film using a heat sealer.
Results:
Razor Blade on Carbon Steel |
Razor Blade on Copper |
|||||
Material |
Panel #1 |
Panel #2 |
Panel #3 |
Panel #1 |
Panel #2 |
Panel #3 |
Corrosion Intercept |
Fail |
Fail |
Fail |
Fail |
Fail |
Fail |
VCI-126* |
Pass |
Pass |
Pass |
Pass |
Pass |
Pass |
Control |
Fail |
- |
- |
Fail |
- |
- |
*Typical results for VCI-126.
Note: The following physical changes were noticed on the contact side of the Intercept material after the test was finished: Discoloration and separation of layers (see photo).
SO2 Test |
Final Results |
|||
Material |
Panel #1 |
Panel #2 |
Panel #3 |
Pass/Fail |
Corrosion Intercept |
Grade 2 |
Grade 0 |
Grade 2 |
Fail |
VCI-126* |
Grade 4 |
Grade 4 |
Grade 4 |
Pass |
Control |
Fail |
- |
- |
- |
*Typical results for VCI-126 Film.
Grades 3 and 4 are passing
ASTM D 1748 (Humidity Chamber)
Material |
Panel # |
Amount of Corrosion after 168 Hr. |
Corrosion Intercept |
1 |
15% |
2 |
15% |
|
Control |
15% |
Conclusions: According to the test results above:
1. The Griffolyn Corrosion Intercept material does not provide multimetal corrosion protection (see Razor Blade Test for carbon steel and copper). Note: Corrosion formed on the Intercept film and on the carbon steel panels in the presence of water at room temperature (see attached photos).
Estimated Cost of Project: $112.50
Project #: 00-169-1125
To: Boris Miksic
For: Cortec Corporation
From: Debbie Hannan
Date: August 16, 2000
cc: Anna Vignetti
Art Ahlbrecht
Tom Nelson