Sulfinert Coatings
For Sampling, Transfer, andAnalysis of
Sulfur Compounds to less than 20ppb
At-a-Glance
Product
Information
fromRestek
Features&Benefits
800-356-1688
814-353-1300
Restek is proud to offer Sulfinert
™
coatings—the next generation of metal passiva-
tion coatings for low-level sulfur storage and transfer. Restek has been a pioneer in
the development and the application of passive coatings since 1987, beginningwith
the introduction of our Silcosteel
®
treatment. Recently, new sulfur regulations and
low detection limits have created a demand for an even more inert surface, so we
created Sulfinert
™
coatings.
Commonly Asked Questions
How is Sulfinert
™
coating different fromSilcosteel
®
coating?
Sulfinert
™
coating has been proven to hold organo-sulfur compounds at lower con-
centrations than Silcosteel
®
coating under static sampling conditions. Sulfinert
™
coating was developed specifically to sample or transfer organo-sulfur compounds
at concentrations to less than 20ppb.
Why does Sulfinert
™
coatingwork sowell for sulfur compounds?
The Sulfinert
™
layer is applied to the stainless steel surface and is completely inert to
organo-sulfur compounds. Typically stainless steel will adsorb or react with sulfur
compounds such as hydrogen sulfide andmercaptans. The Sulfinert
™
layer will pre-
vent sulfur compounds from contacting the reactive stainless surface.
Why use Sulfinert
™
coatings instead of fused silica linings?
TheSulfinert
™
coating canbeused in awidevarietyof pH ranges. Fused silica linings
will become activewhen amines or other basic compounds are sampled because of a
chemical reactionwith the Si-O bond.
Is custom coating service available?
Restek offers custom service for parts in your sulfur analysis systems such asman-
ifolds and valves. Combining this service with the stock Sulfinert
™
-treated parts
offered by Restek will permit your entire sulfur system to be inert. Contact our
technical service department at 800-356-1688 or 814-353-1300, ext. 4, to inquire
about our custom Sulfinert
™
service.
Lit. Cat. # 59318A
© Copyright 2002, RestekCorporation
What is Sulfinert
™
Treatment?
The Sulfinert
™
coating is the leading
passivation technique for the storage and
transfer of low-level, organo-sulfur-
containing samples.
The Sulfinert
™
coating is ideal for use in
environmental, petrochemical, polymeric,
high- and low-pressure environments.
The Sulfinert
™
layer is stable in awide
variety of pH ranges. Unlike fused silica
coatingswhich can dissolve in a caustic
environment, the Sulfinert
™
coating is
stablewhen sampling caustic amines as
well as acidic sulfur compounds.
Feature
Inert
Durable and flexible
Stable in awide pH range
Thermally stable
Non-polymeric
Readily available
Benefit
No adsorption of sulfur compounds.
Will not crack or flake.
Sample amines and sulfur compounds
without compromising compound stability.
Usable to 600°C.
Nomemory effects as seenwith
Teflon
®
-coated parts.
Treated tubing and fittings are in stock for
immediate delivery.
™
Always use Sulfinert
™
-coated components
when peak performance is required for
your sulfur analyses.
