COLD GALVANIZING COMPOUND...
a proven concept for CORROSION CONTROL
MR/MANUFACTURER
ZRC® Products Company, a division of Norfolk Corporation, has been
manufacturing Z.R.C.® Cold Galvanizing Compound since 1952. Developed as a
reliable answer to corrosion problems, Z.R.C. is widely accepted for stopping rust and
rust creepage on metal surfaces.
Because of its unique 95% zinc composition and genuine cathodic
protection, as recognized by Underwriter's Laboratories, Inc., Z.R.C. has a long history
of preventing corrosion in applications ranging from aerospace tracking antennas to
high-rise buildings and industrial complexes the world over. ZRC Products Company has
grown from being a regional and then national manufacturer to becoming an international
leader in corrosion control.
All Z.R.C. is produced and tested at the company's modern
manufacturing facility in Quincy, Massachusetts,just south of Boston. ZRC Products Company
has a reputation for providing a premium quality product backed by extensive experience
and engineering background.
DT/DOCUMENT
This catalog is intended as an introduction to Z.R.C. Cold
Galvanizing Compound and to ZRC Products Company, as a quality supplier to the
construction, architectural, industrial, O.E.M., government and marine industries. It
contains an overview of product applications along with appropriate technical and
specification data.
PP/PRODUCT PRESENTATION
DESCRIPTION
Z.R.C. is a liquid compound containing 95% zinc in the dried
fill that bonds to clean iron, steel or aluminum through electrochemical action to provide
maximum protection against rust and rust creepage.
Z.R.C.® vs PAINT
It is important that there is an understanding of the conceptual
difference between Z.R.C. and paint.
While all types of paints provide only a "skin"
protection, Z.R.C. imparts cathodic action against corrosion - i.e., in the presence of
moisture, its metallic zinc content becomes an anode and the underlying surface a cathode.
Corrosion attacks the zinc leaving the base metal untouched.
If the "skin" of a paint is broken in any way, it will
rust in that area and also allow rust creepage under the break. However, if Z.R.C. is
scratched to the bare metal, the zinc will form an insoluble zinc salt on the exposed
area. This heals the break and continues to protect the surface against any corrosion.
Thus - Z.R.C. Compound will not allow rust creepage.
ADVANTAGES & FEATURES
In zinc compounds, as in all protective coatings, there are various
levels of quality and performance. Z.R.C. Cold Galvanizing Compound is at the top of
the scale in terms of both product formulation and performance characteristics.
With 95% pure zinc metal content produced under carefully controlled
conditions, Z.R.C. providers true cathodic protection for ferrous and nonferrous surfaces.
It has proven itself repeatedly in the most hostile environments. No other zinc coating
surpasses the protection of Z.R.C.
Z.R.C. offers the following features:
- Stops rust AND rust creepage on any surface, any size, anywhere -
also renews worn or broken hot-dip galvanized surfaces.
- Ready for use directly from container.
- Application: brush, spray, roller. Effective on all ferrous and
nonferrous surfaces.
- VOC-compliant.
- Accepted by U.S. Department of Agriculture.
- Authorized for food contact.
- Recognized by independent testing laboratories as the equivalent of
hot dip galvanizing.
UA/USES, APPLICATIONS
Z.R.C. INSTEAD OF HOT-DIP GALVANIZING
Z.R.C. Cold Galvanizing Compound is used widely in place of hot-dip
galvanizing. It is recognized by independent tests to be the equivalent of hot-dip
galvanizing when applied in a dry film thickness of 3 mils. A comprehensive report from
Underwriter's Laboratories, Inc. is available. Easily applied by brush or spray, Z.R.C.
provides galvanic action to stop rust in virtually any atmosphere.*
REPAIR DAMAGED HOT-DIP GALVANIZING
Z.R.C. Compound is used extensively to repair hot-dip surfaces
damaged by welding, cutting, burning, shearing or during construction. Hot-dip galvanizing
properly repaired by Z.R.C. is accepted under Federal Specification DOD-P-21035A
(Galvanizing Repair Spec). Z.R.C. meets and exceeds the ingredient and performance
requirements of this specification.*
REGALVANIZING WORN HOT-DIP SURFACES
Eroded hot-dip surfaces such as corrugated steel may be regalvanized
with Z.R.C. The surface must first be wire brushed to remove rust and loose materials and
then cleaned. If the surface is very unevenly eroded, bare areas should be spot primed
with Z.R.C. before coating.*
PROTECTION OF WELDMENTS
Weldments are susceptible to corrosion due to the weld area having a
different electrical potential than the base metal. Z.R.C. applied to weld seams
galvanically inhibits corrosion. The surface must be brushed and cleaned with a phosphoric
acid base compound per MIL-C-10578C type II or strong solvent (if oily). Z.R.C. is easily
applied to provide lasting protection.*
REPAIRING INORGANIC ZINC SURFACES
Z.R.C Compound is suitable for the touch-up of inorganic zinc
silicate coatings damaged by welding, cutting or transit. Both damaged and contiguous area
should be thoroughly washed with water or mild detergent to remove any zinc oxides that
may have formed. When dry, a full coat of Z.R.C. should be applied within the washed area.
*Detailed specification guidelines available upon request.
