Coatings World - June 2011

the manufacturing setting and the cus-
tomers’ requirements. The new Peridium
Powder Coatings—including hybrid, poly-
ester and epoxy technologies—with Agion
technology is a powder coating made
without water or petroleum-based sol-
vents, and is applied electrostatically and
cured through a baking process. This per-
formance feature in Peridium powder
coatings is exhibited in excellent final
hardness and abrasion resistance of the
coating, the company said. Agion antimi-
crobial solution provides continuous
product protection by releasing silver ions
to the surface at a steady rate, and is de-
signed to last the useful life of the prod-
uct. Peridium Powder Coatings with
Agion antimicrobial technology are ideal
for healthcare furnishings, fitness equip-
ment, furniture fixtures and many other
industrial applications. The new Peridium
line will be available early this summer
through Vogel sales representatives.

Sherwin-Williams introduces
EnviroLastic AL
Sherwin-Williams has introduced Envi-
roLastic AL, an aliphatic polyurea coat-
ing system that offers excellent color and
gloss retention compared to traditional
aromatic polyureas, the company said.
EnviroLastic AL prevents yellowing and
gloss reduction from UV light and offers
elastomeric performance by bridging
gaps up to 1/8 inch. The combination of
weatherability, crack bridging capability
and adhesion properties make this
USDA-approved, seamless coating system
suitable for interior and exterior
walls and ceilings as well as ex-
terior tanks and silos at manu-
facturing facilities, food and
beverage plants or pharmaceutical clean
rooms. This low-odor, zero-VOC, 100
percent solids coating is also in accor-
dance with SSPC standards for Paint 39,
which stipulate performance require-
ments for a two-component weatherable,
polyurea topcoat. EnviroLastic AL can be
applied at thicknesses of 30-250 mils,
which provides a quick return to service
with a three-minute tack-free time and
24 hours for a full cure. Sherwin-
Williams’ EnviroLastic polyurea portfo-
lio was introduced to provide a seamless,
durable, yet flexible, coating with pre-
mium adhesion. CW

Geomet zinc flake technology opens new horizons for corrosion protection

Large R&D resources in NOF Metal Coatings Europe, winner of European Responsible Care Award 2010, have been allocated in the recent years to the development of the range of Geomet applications. These developments open new possibilities of industrial applications in the field of protection against corrosion, the company said. Examples are high performing black coatings and coatings lasting the required life on chassis components. At the same time, NOF said its R&D team succeeded in developing Geomet chemicals that allow the VOC content of these water-based products to be reduced substantially.

Black corrosion protective coatings for threaded parts and other metal components are requested for design reasons by the automotive industry as well as in other industrial fields. NOF Metal Coatings Group, a specialist in thin corrosion protective coating materials, offers two families of black coatings: Geoblack ML and Geoblack 500M obtained by addition to the Geomet basecoat Plus Black topcoat.

The Geoblack KT family is a new development with basecoat Geomet and topcoat Geokote Black. This topcoat ensures a high resistance against all chemicals including strong acids and solvents.

In order to obtain a life lasting zinc-based coating on chassis components in the automotive industry, it is necessary to apply a sufficient thickness of coating material, according to the company. Depending on the application, a range of 15 µm to 30 µm will give the appropriate protection. As the usual thickness of Geomet for bulk parts is six to ten µm, ways for increasing the thickness had to be studied, the company said.

A specific product, Geomet 900, has been developed, which enables the application of 15 µm to 30 µm in one or two coats. The product development has been completed together with the application process development. After alkaline degreasing and without phosphating, the components are dipped in the Geomet tank and drawn out at a controlled speed. As the product is non-drip and non-saggging, the drying and curing cycle can start immediately.

Practical trials over two-years and with components of various types and shapes have proved the potential of this development, the company said. Fuel filler tubes for instance can be coated with one coat of Geomet 900 by this process while a black top-coat can be sprayed on the outside part for the color requirement and for additional protection.

All Geomet black coatings are chromium-free, water-based and offer a high corrosion resistance: 1000 hours NSS (Neutral Salt Spray Test) without red rust (Fe corrosion) or white rust (Zn corrosion). Outdoor weathering tests and vehicle tests have shown a corrosion resistance performance that matches the current expectations for chassis parts in the automotive industry.