Silcosteel
®
-CR is a propri-
etary (patent pending),
multilayer silicon, chemical
vapor-deposited (CVD)
coating, specifically designed to improve corro-
sion resistance of steel, stainless steel, alloys,
glass, and ceramics.The unique non line-of-sight
CVD process produces a flexible amorphous sili-
con layer that diffuses into themetal lattice.The
layer will conform to themost intricate surface
whilemaintaining high dimensional tolerances.
Silcosteel
®
-CRwill deformwith tubing surfaces,
allowing leak-free seals or radius bends.
Independent LaboratoryTesting
Corrosion testing of Silcosteel
®
-CR treated 316L
stainless steel and untreated 316L steel accord-
ing to ASTMG 48, Method B
2
(72-hour ferric
chloride pitting and crevice corrosion testing),
shows corrosion of the treated stainless steel is
reduced by an order of magnitude, asmeasured
byweight loss (Figures 2 and 3).
ImproveCorrosionResistanceof
Stainless Steel Tenfold, orMore
Economical protection
against corrosion
Silcosteel
®
-CR treatment extends the lifetimes
of steel and steel alloy systems, while
maintaining high dimensional tolerances, high
temperature capability, and leak-free conditions,
making it an ideal treatment for:
•process tubing, fittings, valves, and reactors
•gas transfer and delivery systems
•nozzles
•stack gasmonitors
•analytical testing equipment
Silcosteel
®
-CR is highly effective protection for
equipment exposed to:
•hydrochloric, nitric, or sulfuric acid
•marine environments
ApplicationsNote
110Benner Circle • Bellefonte, PA 16823
800-356-1688•814-353-1300• fax: 814-353-1309
Restek
Performance
Coatings
Reducedowntimeandextend
system lifetimewithSilcosteel®-CR
treatment
Introduction
The annual cost of metallic corrosion in the
United States totals $276 billion
1
, ormore than
3% of theUS gross domestic product. Industry
is especially susceptible to high corrosion costs,
due to exposure of facilities and equipment to
both aggressive process chemicals and ambient
weather conditions.The annual direct cost of
corrosion toUS industry is $17.6 billion
1
.
Methods available to control industrial corrosion
are limited to corrosion-resistant alloys, barrier
coatings, cathodic protection, and corrosion
inhibitors.When properly applied, eachmethod
can be effective in slowing corrosion, but each
has limitations aswell. For example, some coat-
ings are inexpensive, but require rigorous
inspection and/or frequent reapplication.
Corrosion-resistant alloys can provide excep-
tional protection, but can be prohibitively expen-
sive. Some alloys require significant process
redesign, increase operating cost, or generate
hazardouswaste.
Silcosteel
®
-CR is a new class of performance
coating, offering an order of magnitude
improvement in corrosion resistance, or greater,
relative to existing processes. Silcosteel
®
-CR
maintains high dimensional tolerances, demon-
strates extreme heat capability, and exhibits
leak-tight system performance in steel, stainless
steel, and alloy systems.This study presents
laboratory corrosion test results and potential
cost savings of applying this alternative corro-
sion-resistant barrier coating technology.
Figure1
Corrosion costsUS industriesover
17.6billionper year (USdollars).
Figure2
Silcosteel®-CR treated stainless steel
outperformsuncoatedmetal byanorder of
magnitude (ASTMG48,MethodB).
Figure3
Silcosteel®-CR treated316L stainless
steel coupons showno crevice corrosionand
only slight pitting corrosion; untreated coupons
exhibit severe crevice corrosion.
Silcosteel®-CR treated
untreated
paper
refining
food
chemical
appliances
oil & gas
agricultural
mining
electronics
6
4
2
0
0
50
100
150 200 250
Untreated 316 SS
Silcosteel
®
-CR
weight loss in grams per squaremeter
