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
- Grade 0 - Extensive corrosion covering 25% or more of panel
surface
- Grade 1 - Moderate corrosion covering 10-25% of panel surface
- Grade 2 - Slight corrosion 5-10% of panel surface
- Grade 3 - Very slight corrosion 0-5% of panel surface
- Grade 4 - No visible corrosion on panel surface
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).
- The Intercept material does not provide corrosion protection
in a sulfur dioxide environment.
- The films ability to provide corrosion protection is affected
by climatic conditions (see ASTM D 1748 Humidity Test).
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
|