PaintSquare.com
      | Connect Follow us on Twitter Like us on Facebook
About | Subscribe | Advertise
  

 

Free Download of our eBook on Overcoating Bridges and Other Structures

Paint and Coatings Industry News

Main News Page


Protective Coatings are Metal Free

Friday, August 26, 2011

More items for Coating Materials

Comment | More

Delaware-based AnCatt Inc. has unveiled a heavy-duty, three-layer coating system that purportedly functions as a corrosion barrier for metal substrates without using chromate or other heavy-metal pigment.

The company says the system—a primer, two-component aliphatic urethane top layer, and optional interlayer—has withstood more than 10,000 hours of Salt Fog (ASTM B 117) testing on steel without rusting or blistering. Coated aluminum panels have been tested for more than 7,000 hours, the company says. (ASTM standards require a maximum of 5,000 testing hours.)

 Offshore platform

 Photos: AnCatt Inc.

The coating system is designed to protect a variety of metals from corrosion in severe environments.

AnCatt says the test panels showed no visible changes in appearance, including cracking, flaking, and chalking.

The tests were conducted by KTA-Tator Inc. of Pittsburgh, AnCatt reports.

Corrosive Environments

The system uses conductive polymer (polyaniline) composites as anti-corrosion pigments. The system is designed to be used in severe conditions to protect a wide range of metals, including structural steel, pipeline, tanks, bridges, offshore platforms, marine hulls, superstructures and decks.

The primer “serves as an excellent heavy-metal-free replacement for existing heavy-metal-based vinyl wash primers with even better performance,” says the company, which also offers a low-VOC anti-corrosion system.

Selected Features and Performance

AnCatt’s primer contains no zinc chromate, hexavalent chromium, lead or other heavy-metal pigments, the manufacturer reports.

AnCatt says the system provides very good adhesion, with tensile adhesion (pull-off strength) of 700-800 psi on samples following 1,000 hours cyclic weathering exposure. The self-healing formulation features low-cost raw materials and is easy to manufacture, says AnCatt, which is seeking licensing partnerships.

 salt fog test panel  adhesion test panel

P7 after 8,372 hours Salt Fog Exposure (coated CRS panel)

P8 Adhesion Test after 8,372 hours Salt Fog Exposure.

•   Pull-Off Test: (the three circles)
•   Tape Adhesion Test (the three cross marks)

The photos show results of salt fog testing (ASTM B 117) over 8,372 hours, according to AnCatt.

“Since the reporting of anti-corrosion effect of polyaniline in 1981, hundreds of papers and patents have been published or issued on polyaniline anti-corrosion coatings as an environmentally friendly alternative,” says Sue Wang, the company’s Business Development Manager. “Still, there is no such product on the market today.”

She adds:  “Today’s alternatives, such as hexavalent chromate (chromium VI), are highly toxic, carcinogenic, and under tightening regulations. Even the less-toxic zinc falls short, since it cannot protect aluminum or galvanized steels and is less effective in severe corrosion as a sacrificial antidote.”

More information: http://www.ancatt.com.

   

Tagged categories: Accelerated laboratory testing; Bridges; Corrosion resistance; Hexavalent chromium; KTA-Tator; Marine; Marine Coatings; Offshore; Oil and Gas; Performance testing; Pipeline; Pipelines; Primers; Protective coatings; Salt fog

Comment Join the Conversation:

Sign in to our community to add your comments.

International Paint LLC
Light Duty Protective Coatings

Check out our expanded line of alkyd, acrylic and waterborne epoxy coatings.


Wasser High-Tech Coatings Inc.
Wasser Coatings Protect

Wasser Coatings offer a complete range of Moisture Cure Urethane (NEPCOAT approved) systems in addition to Polyurea membranes and linings(NSF).
www.wassercoatings.com


Sherwin-Williams
Sherwin-Williams Protective & Marine Coatings

With 4,000 distribution points and 3,700+ years of experience, Sherwin-Williams delivers the products, support and expertise you need, right where you need it.


Mitsubishi Gas Chemical America
Performance Amine 1,3-BAC

A highly reactive cycloaliphatic diamine offering superior performance. Reasonable cost and curing efficacy makes it suitable for all types of epoxy resin applications.


SAFE Systems, Inc.
SAFE Systems'
Blast Lights &
Deadman Switches

Halogen or LED blast lights available with our NEW urethane bumper. Switches available in many colors for color coding your hoses.


Armakleen Company, The
ARMEX when nondestructive cleaning is critical

When substrates cannot be damaged ARMEX is the only choice for blast media. ARMEX is a USDA approved A-1 cleaner available in eleven formulations.


Jessup Manufacturing Company
More Traction for Extreme Marine Conditions

Jessup Safety Track® 3800 Military Grade peel-and-stick non-skid tapes and treads provide extra slip resistance for decks. MIL-PRF-24467C Type XI, Black & Gray.


Midsun Specialty Products
Stopaq 30+ Year Coatings

Use Stopaq corrosion prevention coatings on pipelines, field joints, tank chimes, structural steel and more. Learn more at www.midsunsp.com/stopaq


Specialty Products, Inc. (SPI)
SIGN UP TODAY – HANDS ON TRAINING

After 40 years in the coating business, SPI has trained more industry professionals than any other polyurea manufacturer. Now offering more classes at more locations than ever before!


Absolute Equipment/Grand Rental Station
Portable Power from Absolute Equipment

•Compressors
•Lighting Systems
•Generators
•Light Compaction
Sales • Rental • Service
Call 1-866-931-6655
Over a century of
providing excellence.

 
 
 
Technology Publishing

The Technology Publishing Network

The Journal of Protective Coatings & Linings (JPCL) PaintSquare
Durability + Design Paint BidTracker

 
EXPLORE:      JPCL   |   PaintSquare News   |   Interact   |   Buying Guides   |   Webinars   |   Resources   |   Classifieds
REGISTER AND SUBSCRIBE:      Free PaintSquare Registration   |   Subscribe to JPCL   |   Subscribe to PaintSquare News
MORE:      About PaintSquare.com   |   Privacy policy   |   Terms & conditions   |   Site Map   |   Search   |   Contact Us
 

© Copyright 2000-2015, Technology Publishing / PaintSquare, All rights reserved
2100 Wharton Street, Suite 310, Pittsburgh PA 15203-1951; Tel 1-412-431-8300; Fax 1-412-431-5428; E-mail webmaster@paintsquare.com