ID
× COMMENTARYCOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More
Chemical Engineering MagazineChementator Briefs
H2SO4 Catalyst BASF SE (Ludwigshafen, Germany; www.basf.com) has introduced a…
BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILEENVIRONMENTAL MANAGEREQUIPMENT & SERVICESFOCUS
12. Alfa_Laval_Valve_MatrixFocus on Valves
This butterfly valve has an inflatable seat for tight closure…
NEW PRODUCTS + Show More SHOW PREVIEWS

Comment Environment, Health, Safety & Security

An improved anti-corrosion coating for steel

By Scott Jenkins |

Using zinc-based coatings to protect galvanized steel from corrosion has been standard practice in the steel industry for decades, but these processes have several key disadvantages. First, achieving longer corrosion performance requires thicker layers of zinc, which raises costs and also limits the ability to shape and bend the steel subsequently. Also, the coating processes often involve compounds containing hexavalent chromium, which presents serious health and environmental risks.


A series of coating formulations, known collectively as Intercoat ChemGuard, developed by Chemcoaters Inc. (Gary, Ind.; www.chemcoaters.com), overcomes these limitations. Using a reverse roll-coating process, the anti-corrosion coatings are applied over a steel substrate that has been coated with low levels of zinc. The coatings generate covalent bonds with the zinc on the steel surface, forming a layer of reacted material. Meanwhile, the outermost layer of the coatings remains unreacted, allowing the coating to have self-healing properties, which allows the corrosion protection to persist after the steel is cut or punctured.


“When Intercoat ChemGuard is applied over the lightest possible coating of zinc that is commercially available in flat-rolled hot-dip-galvanized (G30) steel, the anti-corrosion performance exceeds that of steel with the heaviest possible coating of zinc that is available in flat-rolled hot-dip-galvanized (G235),” explains Mike Tieri, vice president of sales and marketing with Chemcoaters (see photo). “And the coating process is based on trivalent chromium chemistry, which means it is compliant with the RoHS (restriction of hazardous materials) directive for hexavalent chromium,” he adds.


The proprietary coatings, containing both inorganic and organic components, can be adjusted depending on the requirements of an application. The coatings form surface crosslinks that allow the steel coated with Intercoat ChemGuard to be bent, flexed or welded. Other formulations maximize adhesion of paints and other subsequent coatings on the steel.


Intercoat ChemGuard products are available commercially now, and have been used to treat steel for the transportation industry and elsewhere. Chemcoaters is looking for partners to develop new applications for the technology.


anti-corrosion coatings

Related Content
Highly reinforced low-VOC coatings
This company has introduced a new range of low-VOC coatings that provide 100%-solids epoxy lining performance. The coatings are reinforced…

Chemical Engineering publishes FREE eletters that bring our original content to our readers in an easily accessible email format about once a week.
Subscribe Now
Trinseo Digitizes Control System Migration Projects to Achieve Fast ROI
Purdue University Saves $400,000 Annually with Local Vacuum Networks
Bag filter Housings/Vessels
Innovative Backwashable Media Filter
Automated Vertical Tower Filter Press

View More

Live chat by BoldChat