vci coating performance testing
PERFORMANCE OF VCI COATING, LLC ANTI-CORROSION PRIMER AS DETERMINED BY MATCO SERVICES AND KTA TATOR ACCELERATED EXPOSURE RESULTS PLUS REAL TIME EXPOSURES
kta-tator, inc. 2015 - 2016 vci coatings report
"Two coating materials, each with and without the addition of a vapor phase corrosion inhibitor (VCI), were tested by KTA. There was no decrease in tensile adhesion strength properties for either coating material due to the addition of the VCI agent. Addition of the VCI agent to the MIL-DTL-24441 primer resulted in a measurable reduction in the degree of coating failure observed at the “X” scribed areas on both the rusted and white metal substrates. The MIL-DTL-24441 primer with VCI agent provided better resistance to corrosion than the Sherwin-Williams zinc phosphate primer with respect to both rust creepage and overall degree of rusting..." Read full copy of the report...
matco services, inc. may 2013 vci coatings report data
VCI COATINGS. LLC
POLYAMIDE EPOXY PRIMER PLUS VAPOR PHASE CORROSION INHIBITOR (VCI)
VCI Coatings, LLC manufactures a unique 2 part polyamide epoxy primer coating having superior corrosion prevention properties by virtue of the addition of a high performance vapor phase migratory corrosion inhibitor VCI Coating Agent 12. The primer conforms to MIL-DTL-24441in all formulas and types as modified by the addition of the VCI Coating Agent 12 to Part A in an amount that when Parts A and B are combined and applied the resulting dry film contains 2.5 Wt, % of the VCI agent.
Performance properties are measured with and without the VCI agent added to the primer applied on black beauty abraded steel panels in the white metal and 24 hour salt fog exposed corroded conditions. The primer applied at a dry film thickness of 3 mils is exposed for 500 hours in a salt fog chamber in accordance with ASTM 8117. Dry film adhesion before exposure is rated at 5B (no loss) per ASTM 03359 on all samples of coated steel. Corrosion resistance is measured per ASTM 01654 (Evaluation of Painted Specimens Subject to Corrosive Environment) where a rating of 10 is zero degree of creep away from the X scored area and a rating of 1 is 13 to 16 millimeters of creep, and ASTM 0610 for the percentage of surface covered with rust spots where 10 is no rust and 1 is 56 to 75 percent of surface rusted.
The following performance ratings are supplemented by the photographs below.
Test Panel Condition Figures Without VCI Added With VCI Added
Creep Degree of Rust Creep Degree of Rust
X Scored Flat Side X Scored Flat Side
Abraded White Steel 1 - 2 5 1 4 7 7 9
Abraded Corroded Steel 3 - 4 3 1 3 6 6 9
The measured performance on rust covered steel is due to ability of the VCI to migrate through the rust layer and inhibit further corrosion of the white steel layer and to also migrate into recessed areas where contact corrosion inhibitors cannot reach.
VCI COATINGS,LLC EPOXY / VCI COMPARATIVE PERFORMANCE
POLYAMIDE EPOXY PRIMER ON ABRADED WHITE STEEL WITH AND WITHOUT VCI COATINGS VAPOR PHASE CORROSION INHIBITOR ADDED AFTER 500 HOURS IN SALT FOG CHAMBER.
VCI ADDED AT 2.5%
WITHOUT VCI
VCI ADDED AT 2.5%
WITHOUT VCI
POLYAMIDE EPOXY PRIMER ON ABRADED CORRODED STEEL WITH AND WITHOUT VCI COATING VAPOR PHASE CORROSION INHIBITOR ADDED AFTER 500 HOURS IN SALT FOG CHAMBER.
VCI ADDED AT 2.5%
WITHOUT VCI
VCI ADDED AT 2.5%
WITHOUT VCI
VCI-Coating Polyamide Epoxy Primer is available for supply in commercial quantities as 2 gallon kits and as samples in one quart kits. Made for VCI COATINGS, LLC by an established paint manufacturer in all presently specified forms of 2 part polyamide epoxy paint formulations.
Classified as FLAMMABLE per DOT and OSHA regulations. Sold only to commercial and government entities.
VCI Coatings™ - patent pending.