Coated Coil
Monday | 14 February, 2011 | 6:33 am

Coating conundrum

By Lauren Duensing

February 2011 - A recent paper by the National Coil Coating Association, Cleveland, discusses how specifying coating weights for new non-chromate coatings differs from the ASTM B449-93 standard specification for chromates on aluminum. According to the NCCA, the B449 standard is not applicable to new coatings; however, many professionals are using the standard.

According to Doug Robbins, vice president of quality and technology services for Roll Coater, Indianapolis, and chairman of the NCCA technology committee, the paper is important because it addresses the fact that customers are trying to apply chromated standards inappropriately to non-chromated treatments. "Many of these coatings are new and were not available," Robbins explains, noting the paper is important because it can assist aluminum coaters in addressing the requirements for non-chromated or ROHS-compliant coatings. "The industry is moving to address the requirements for non-chromated coatings," he says.

Chrome coatings are standardized and have been used for many years. However, new non-chrome coatings are "anything but standard and, in fact, are innovative," Robbins says. The industry currently is working toward developing treatments/coatings for non-chromates that meet requirements while meeting "the performance of a chrome treatment," he says, adding standardizing requirements before ample research can be completed could stifle development.

Toxicity risk
Tom Cape, technical manager for coil products at Henkel Technologies, believes coil coaters as a group "are very much aware of the toxicity and environmental effects of chromates and would like to eliminate their use in the passivates used on incoming metal, in pretreatments and in primers." Cape says coil coaters are "hampered by the resistance of customers to buy non-chromated products and by the need to evaluate each pretreatment and primer separately."

"Having pretreatments or primers that meet standards would help overcome the resistance," he says, adding resistance to using non-chromate coatings stems from the customers knowledge that the current chromate treatments and primers perform well, ensuring excellent paint adhesion and painted corrosion resistance.

"Conformance to ASTM B-449 is one way the industry assures the end user that excellent pretreatments and primers were applied to their product," Cape says."This assurance is lost with the use of non-chromate coatings. The coated coil customer is asked to use a product that has eliminated the chromate/chemical that they know to work well." Therefore, the product is no longer in compliance with ASTM B-449 or an equivalent ASTM standard and could cost more, he says. MM

mm sm ed cal banner330px 2016

MM Cover 10 15 digital

vert-current-linewhiteOctober 2015

2016 End User Outlook

Although low pricing on metal products across the globe once inspired companies to stock up, there’s little appetite for risk peering into 2016.


Instagram - @ModernMetalsMag

MIDWEST register deadline3

Modern Metals on Twitter


Industry Partners


PNC BankDoALL Sawing ProductsStraub Metal International


Executive Search Services

Sawing Technology

Stainless Steel

Aluminum USA 2015 Leadership Search Group Advanced Machine & Engineering Rolled Alloys
Kaiser Aluminum

Financial Services

Behringer Saws, Inc. Scan Tube/Nebetco Stainless
Sapa Extrusions North America BMO Harris Bank Cosen International, Inc. Stainless Sales Corporation
Gerdau Special Steel North America

Industrial Contracting Solutions


Stainless Steel Service Center

CNC Cutting (Plasma, Waterjet, Laser, Router)

Delta Industrial HE&M Saw Comprinox
Multicam Inc.

Laser Technology


Stainless, Nickel, Aluminum, Pipe, Tube & Bar

Coated Coil

Amada America, Inc. Kasto Inc. Prudential Stainless & Alloys, L.P.
Centria Coating Services Mazak Optonics Corp. KMT Saw


Coil Coatings

Machining Centers

Lenox Alliance Steel LLC
Chemcoaters Handtmann CNC Metlsaw Systems Central Steel Service, Inc.

Coil Processing

Material Handling Pacesetter Steel Service, Inc.
Applefelt Combilift USA Scotchman Industries, Inc. Parker Steel Co.
Bradbury Group Samuel Strapping Systems Specialty Saw Inc. SSAB
Braner USA Steel Storage Systems Inc.

Service Centers

Steel Dynamics, Inc.
Butech Bliss Walker Magnetics North American Steel Alliance

Thickness Gauges


Milling Machinery

Reliance Steel & Aluminum Co. Advanced Gauging Technologies
Formtek Maine Amada Machine Tools America, Inc. United Performance Metals


Machine Concepts

Perforated & Expanded Metal


Carlson Tool & Manufacturing Corp.
Red Bud Industries McNichols Co. Compusource Corporation

Tube & Pipe

Copper & Brass


Enmark Systems, Inc. Independence Tube Corp.
Christy Metals Inc. Allor Manufacturing Inc.


Specialty Pipe & Tube, Inc.
Concast Metal Products Churchill Steel Plate Ltd Venus Stainless NA Yoder
Farmer's Copper



Tube Mill Equipment & Machinery

National Bronze & Metals








GRB Innovations LLC



OMAX Corporation








Koike Aronson




XRF Analyzer




Olympus Scientific Solutions Americas


Instagram Icon Large twitter facebook linkedin rss

FFJ 1115 brandingcovers