is the best gun coating on the market and this page will
For additional information please vsit the Cerakote
Firearms Coatings Website.
Spray (ASTM B117) Corrosion testing is used to evaluate the relative
corrosion resistance of coated panels exposed to a salt spray or
fog at an elevated temperature. Coated panels are placed in an enclosed
salt spray chamber at a 15-30 degree angle and subjected to a continuous
indirect spray of a neutral (ph 6.5-7.2) salt water solution. The
chamber/cabinet is kept at an operating temperature of 95F and fogging
a 5% salt solution at the required 12mllhr. Cerakote™ H-146
Graphite Black panels were checked for corrosion at specific intervals
of 45, 160, 255, 385, 675, 850, 1000, 2000, 3000 and 3500 hours.
At 3500 hours Cerakote™ H-146 was not corroded. This study
shows that Cerakote™ preserves the life of a firearm in a
corrosive environment longer than any competitive coatings.
Abrasion is a test using a weighted abrasive wheel that rotates
at a constant speed to determine the resistance of finishes to abrasion
and wear, as stated by test standard ASTM D4060. 7 competitive finishes
including Cerakote™ H-146 Graphite Black were tested in accordance
with ASTM D4060. Each finish was tested three separate times in
order to validate the test result. Panel weights and mil thickness
were measured prior to the start of each test to determine a wear
rating. A 1000 gram weight was placed on a CS-17 Taber Abrasion
wheels as required by ASTM testing standards for testing finishes.
Panels were cycled until the Taber wheel wore through the finish
to the steel substrate. Finishes that required more than 500 cycles
to wear through to the substrate were stopped every 500 cycles for
the Taber abrasion wheels to be cleaned. Cleaning the Taber wheels
every 500 cycles is a requirement to ensure accurate results. Once
the Taber wheel has breached the finish, the Taber abrader is stopped
and a final weight is taken to determine the wear rating for each
finish. Wear ratings are calculated by taking the weight of the
test panel before abrasion and subtracting the weight of the test
panel after abrasion and multiplying that by 1,000. That number
is then divided by the number of cycles completed before the finish
was worn through. The resulting number is the specified wear rating
for that finish. Based on ASTM testing standard D4060, Cerakote™
Finished Strong by lasting nearly twice as long as the nearest competitive
finish and 24 times as long as the furthest competitive finish.
Resistance (ASTM D2794) measures the resistance of organic coatings
to the effects of rapid deformation (impact). Impact resistance
is measured by placing a coated panel in a universal impact tester.
A standard weight is dropped a distance to strike an indenter that
deforms the coatings and the substrate. The indentation can be either
an intrusion or an extrusion. By gradually increasing the distance
the weight drops. (1 inch at a time) the point at which failure
occurs can be determined by cracking or delimitation of the coating.
Cerakote™ H-146 Graphite Black was tested to have an impact
strength measuring 160 inch-lbs which is the maximum the impact
tester, can measure.
or Pencil Hardness (ASTM D3363), is measured by using different
grades of pencil lead to cut through a coating surface. To conduct
this test, a coated panel is placed on a flat, horizontal surface.
A weighted trolley with the hardest pencil lead (9h) is placed on
the panel and pushed away from the operator. The length of the stroke
should be about 6.5 mm. This process is repeated until a lead is
found that will not cut through the coating to the metal for a distance
of at least 3 mm (this is the pencil hardness rating). This process
is then repeated until a lead is found that will not cut nor scratch
the coating (this is the scratch hardness rating). Cerakote™
H-146 Graphite Black finished strong with a 9h hardness rating,
the highest hardness rating that can be achieved.
or Mandrel Bend (ASTM D522), testing is measured by placing a coated
panel in a conical Mandrel apparatus and bending the coated test
panel over a conical shaped mandrel in order to assess the elastically
or resistance of a coating to cracking, elongation and/or detachment
from the metal test panel in accordance with ASTM D522. The conical
shape of the bending area allows the deformation of the test panel
and examination of the elasticity range of a coating over any diameter
between 3.1 mm and 38 mm in one single test. Cerakote™ H-146
Graphite Black was tested in accordance with ASTM D522 and exhibited
excellent flexibility and no signs of cracking, elongation or detachment
from the steel panel.
ability of Cerakote™ H-146 to resist chemical attack was tested
by dipping coated panels into a series of solvents to which the
coating may be exposed during regular use and extreme conditions.
The panels were placed in the solution and allowed to sit for 24
hours. Afterward, the samples were removed, analyzed and assigned
a rank depending on the resistance to each specific chemical. The
results of this test are shown in the table below. The performance
of Cerakote™ H-146 was classified as excellent for 14 of the
solvent tests. This indicates that the coating was not affected
following a 24•hour immersion in the solvents. The coating
also showed good resistance to HCI and experienced only a slight
change in texture after 24 hour immersion.
(ASTM 03359), is a test method to analyze whether a coating has
adhered to metal substrate. Cerakote™ H-146 was applied to
a set of steel panels and a crosshatch patter is made though the
coating to the substrate Pressure-sensitive tape is applied over
the crosshatch cut and then the tape is smoothed into place over
the area of the incisions. The tape is then removed by pulling it
off rapidly back over itself as close to an angle of 1800 and the
adhesion of the coating to the steel is assessed on a 08 to 58 scale
(shown). Cerakote™ H-146 Finished Strong with a 58 adhesion
rating, the highest adhesion rating possible.
So now you know why I believe that Cerakote™ is the best choice
for firearms coating.