VCI PRIMER COST BENEFIT LIFE CYCLE ANALYSIS

SPECIFICATION

VCI Coating meets all specifications for MIL-DTL 24441 formula 150 two part epoxy primer with a migrating corrosion inhibitor added {VCI) to from a dry film containing 2.5 weight percent of the inhibitor.

PERFORMANCE AFTER 500 HOURS IN SALT FOG CHAMBER

These results document a significant reduction in corrosion rate on both white and corroded steel. Similar degree of reduction on both indicates that the VCI agent has migrated through the rust layer to the white steel surface.

COATING                           SURFACE CONDITION                     DRY FILM                    DEGREE OF CREEP                    DEGREE OF RUSTING

Base 24441                                White Steel                                   3 mils                                     5.0                                                 4.0

Base 24441+VCI                        White Steel                                   3 mils                                     7.0                                                 9.0

Base 24441                             Corroded Steel                               3 mils                                     3.0                                                 3.0

Base 24441+VCI                     Corroded Steel                               3 mils                                     6.0                                                 9.0

ECONOMICS OF USE

ASSUME PAINT COST AT 3 MIL DRY FILM 67 VOL% SOLIDS

Primer per square foot cost:

Basic 24441                    $0.25

24441 + VCI                    $0.50

SURFACE PREPARATION REQUIREMENT ON RUSTED STEEL

Basic 24441 or a primer plus zinc requires removal of surface rust and old paint to a white metal condition per NACE 1-4 is estimated to cost about $5.00/ft.

VCI-Coating 24441 with Agent 12 requires pressure water washing to remove surface debris, loose paint and rust at an estimated cost of $1.00/ ft.

TECHNICAL FUNCTION

The VCI migratory corrosion inhibitor migrates through an existing coating and surface rust to the white steel and inhibits further corrosion. The epoxy primer 24441 formulation provides excellent adhesion on existing painted surfaces. Maximum painted surface life is achieved by application of a traditional urethane finish coat at 2 mils dry film.

COMPARATIVE COST PERFORMANCE

Function                                                      Basic 24441 on white steel                                                    24441+VCI on water blasted steel

Surface Prep                                                              $5.00/ft2                                                                                          $1.00/ft2

Paint                                                                            $0.25/ft2                                                                                          $0.50/ft2

Labor                                                                           $0.50/ft2                                                                                          $0.50ft2

Total                                                                            $5.75/ft2                                                                                          $2.00/ft2

Assume that the 500 hour salt fog exposure results show a significant increase in coating life cycle on corroded steel the following can be calculated:

Estimated Life                                                               10 yrs                                                                                                 20 yrs

Cycle Cost                                                                  $0.57/ft2/Yr.                                                                                    $0.10/ft2/Yr.

VCI Coatings™ - patent pending.