Competitive Analysis of EXCOR and Anticortit Films

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 material’s 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 SO₂and 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

 

1. Grade 0 - Extensive corrosion covering 25% or more of panel surface
2. Grade 1 - Moderate corrosion covering 10-25% of panel surface
3. Grade 2 - Slight corrosion 5-10% of panel surface
4. Grade 3 - Very slight corrosion 0-5% of panel surface
5. 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). 

2. The Intercept material does not provide corrosion protection in a sulfur dioxide environment.
3. The film’s 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