Evaluating Cortec VpCI-146 Paper with Requirements Listed in Performance Specification MIL-PRF-3420G
Background: Cortec Corporation is seeking to have Cortec VpCI-146 listed on qualified product list MIL-PRF-3420G. The process of getting listed, involves Cortec Corporation performing the requirement tests as listed in performance specification MIL-PRF-3420G. Upon attaining results in compliance with what is listed in performance specification MIL-PRF-3420G, Cortec Corporation will submit product to Naval Air Systems Command. Naval Air Systems Command will then repeat testing to confirm results attained by Cortec Corporation.
Purpose: Perform the tests as indicated in performance specification MIL-PRF-3420G and compare results with listed result requirements.
Method: Compatibility with Copper Test (MIL-PRF-3420G, Section 4.6.4)
Vapor inhibitor ability Test (FED-STD-101 Test Method No. 4031, procedure B)
Vapor inhibitor ability after exhaustion Test (FED-STD-101 Test Method No. 4031, procedure B)
Contact Corrosivity Test(FED-STD-101 Test Method No. 3005)
Blocking Resistance Test(FED-STD-101 Test Method No. 3003, procedure A)
Water resistance of markings Test (FED-STD-101 Test Method No. 3027)
Bursting Strength Test(FED-STD-101 Test Method No. 2007)
Tearing Strength Test (ASTM D689)
Compatibility with MIL-PRF-131 barrier material Test (MIL-PRF-3420G, Section 4.6.5)
Long Term Protection Test (MIL-PRF-3420G, Section 4.6.3)
Materials: Cortec VpCI-146 paper
The materials used for the above listed methods, are indicated in each test method standard operating procedure.
Procedure: The above tests were performed according to standard procedures for each.
Results:
Compatibility with Copper
Procedure was done according MIL-PRF-3420G, section 4.6.4.2
Compatibility with Copper test results
| Material | Corrosion amount (%) | Performance Requirement |
| Copper panel wrapped with Cortec VpCI-146 paper | 0 | No pitting, etching or discoloration of vapor exposed copper surface |
| Copper panel wrapped with Cortec VpCI-146 paper | 0 | No pitting, etching or discoloration of vapor exposed copper surface |
| Copper panel wrapped with Cortec VpCI-146 paper | 0 | No pitting, etching or discoloration of vapor exposed copper surface |
Vapor inhibitor ability
Procedure was done according to FED-STD-101 Test Method No. 4031 procedure B
Vapor inhibitor ability test results
| Material | Corrosion observed (%) | Performance Requirement |
| Cortec VpCI-146 | 0 | No corrosion, etching or pitting of polished surface of steel panel |
| Cortec VpCI-146 | 0 | No corrosion, etching or pitting of polished surface of steel panel |
| Cortec VpCI-146 | 0 | No corrosion, etching or pitting of polished surface of steel panel |
| Control | ~ 40 |
Vapor inhibitor ability (after exhaustion)
Procedure was done according to Fed-STD-101 Test Method No. 4031 procedure B
Vapor inhibitor ability (after exhaustion) test results
| Material | Corrosion observed (%) | Performance Requirement |
| Cortec VpCI-146 | 0 | No corrosion, etching or pitting of polished surface of steel panel |
| Cortec VpCI-146 | 0 | No corrosion, etching or pitting of polished surface of steel panel |
| Cortec VpCI-146 | 0 | No corrosion, etching or pitting of polished surface of steel panel |
| Control | ~ 62 |
Contact Corrosivity
Procedure was done according to Fed-STD-101 Test Method No. 3005
Carbon Steel panels used.
Contact Corrosivity test results
| Material | Amount of corrosion
after 20 hours (%) |
Performance Requirement |
| Cortec VpCI-146 | 0 | No corrosion, etching or pitting of contact area of panel |
| Cortec VpCI-146 | 0 | No corrosion, etching or pitting of contact area of panel |
| Cortec VpCI-146 | 0 | No corrosion, etching or pitting of contact area of panel |
Blocking Resistance
Procedure was done according to FED-STD-101 Test Method No. 3003 procedure A
Blocking Resistance test results
| Material | Qualitative results | Performance Requirement |
| Cortec VpCI-146 | No blocking, delamination or rupture | No delamination, tearing or flaking when the sheets |
| Cortec VpCI-146 | No blocking, delamination or rupture | No delamination, tearing or flaking when the sheets |
| Cortec VpCI-146 | No blocking, delamination or rupture | No delamination, tearing or flaking when the sheets |
| Cortec VpCI-146 | No blocking, delamination or rupture | No delamination, tearing or flaking when the sheets |
| Cortec VpCI-146 | No blocking, delamination or rupture | No delamination, tearing or flaking when the sheets |
| Cortec VpCI-146 | No blocking, delamination or rupture | No delamination, tearing or flaking when the sheets |
| Cortec VpCI-146 | No blocking, delamination or rupture | No delamination, tearing or flaking when the sheets |
| Cortec VpCI-146 | No blocking, delamination or rupture | No delamination, tearing or flaking when the sheets |
Water resistance of Markings
Procedure was done according to FED-STD-101 Test Method No. 3027
Water Resistance of Markings test results
| Material | Qualitative description of markings after
two hours in circulating water bath |
Performance Requirement |
| Cortec VpCI-146 | Observed markings are clear and legible | Markings shall be clear and legible |
| Cortec VpCI-146 | Observed markings are clear and legible | Markings shall be clear and legible |
| Cortec VpCI-146 | Observed markings are clear and legible | Markings shall be clear and legible |
Bursting Strength
Procedure was done according to FED-STD-101 Test Method No. 2007
Bursting Strength test results
| Material | FED-STD-101 Test Method No. 2007;
Bursting Strength (psi) |
Performance Specification |
| Cortec VpCI-146 paper | 42.28/43.04 | 40 |
Note: Printed side up/Printed side down
See Enclosed report
Tearing Strength
Procedure was done according to ASTM D689
Tearing Strength test results
| Material | ASTM D689 Tearing Strength (gf) | Performance Requirement (gf) |
| Cortec VpCI-146 paper | 39.0/42.4 | 40/40 |
Note: Machine Direction/Cross Direction
See Enclosed report
Compatibility with MIL-PRF-131 Barrier Material
Procedure was done according to MIL-PRF-3420G, section 4.5.6.2
Compatibility with MIL-PRF-131 Barrier Material test results
| Material | Deterioration amount on surface of Cortec VpCI-146 paper % | Performance Requirement |
| Cortec VpCI-146 paper | 0 | No delamination, swelling, embrittlement, dissolution, effect on the sealability or deterioration of barrier materials |
| Cortec VpCI-146 paper | 0 | No delamination, swelling, embrittlement, dissolution, effect on the sealability or deterioration of barrier materials |
| Cortec VpCI-146 paper | 0 | No delamination, swelling, embrittlement, dissolution, effect on the sealability or deterioration of barrier materials |
Long Term protection test
Procedure done according to MIL-PRF-3420G sections 4.6.3.1 and 4.6.3.2
Long term protection test results
| Material | Corrosion amount on four panels after one year (%) | Performance Requirement |
| Cortec VpCI-146 paper | 0 | No corrosion of steel panels |
| Cortec VpCI-146 paper | 0 | No corrosion of steel panels |
| Cortec VpCI-146 paper | 0 | No corrosion of steel panels |
| Cortec VpCI-146 paper | 0 | No corrosion of steel panels |
Conclusion: Cortec VpCI-146 corrosion inhibiting paper satisfies the testing requirements of Performance Specification MIL-PRF-3420G.
Project #: 02-002-1125 (2)
Estimated Cost of Project: $4,500.00
To: Frank Magnifico/Naval Air Systems Command
From: Bob Berg
Date: 4/9/03
cc: Boris Miksic
Anna Vignetti
Art Ahlbrecht
Rita Kharshan
Cliff Cracauer
Vanessa Schultz
Bob Boyle