PaintSquare.com


The First Word in Protective & Marine Coatings

A Product of Technology Publishing / PaintSquare
JPCL | PaintSquare News | Durability + Design | Paint BidTracker

Free Download of

Paint and Coatings Industry News

Main News Page


SSPC Revises Zinc Primer Standard

Wednesday, March 5, 2014

More items for Coating Materials

Comment | More

Testing and performance requirements for highly pigmented primers containing zinc dust are part of new revisions to a standard from SSPC: The Society for Protective Coatings. 

SSPC-Paint 29, "Zinc Dust Sacrificial Primer, Performance-Based," was updated Feb. 25. 

The performance-based standard is for highly pigmented primers that contain zinc dust as the major pigment component (minimum 65 percent weight in the dry film) and are defined by their ability to protect ferrous substrates.

SSPC-Paint 29
©iStock / ZooCat

SSPC revised its performance-based standard for zinc dust sacrificial primers, Paint 29, on Feb. 25.

The standard, originally issued in 1991, contains performance requirements that owners and specifiers can use for inorganic and organic zinc-pigmented primer coatings intended for spray application for use by itself or as a primer in a multi-coat system.

The Updates

The new technical revisions removed the outdoor testing requirements and outdoor performance levels. Performance criteria is now based on evaluation for accelerated exposure in accordance with ASTM D5894, Standard Practice for Cyclic Salt Fog/UV Exposure of Painted Metal. 

The new revisions increased the required accelerated exposure time from 3,000 hours to 5,040 hours for both inorganic and organic zinc-pigmented coatings.

The test to evaluate adhesion has changed from ASTM D3359 (cross-cut) to ASTM D4541 (pull-off). Revised Paint 29 requires adhesion testing to be performed on the cured primer prior to and following accelerated exposure with a minimum adhesion requirement of 600 psi (4.1 MPa) for each of four pulls on unscribed areas  of three test panels.

The maximum allowed scribe undercutting values have been increased from 0 (no undercutting) to 1/16-inch (1.6 mm) for inorganic zinc coatings and from 0 (no undercutting) to 1/8-inch (3.2 mm) for organic zinc coatings. 

SSPC-Paint 29 was revised by Committee C.1.1, Zinc-Rich Coatings, which is chaired by Tony Lambrosa of The Sherwin-Williams Company. 

According to SSPC, when a higher zinc loading level in the coating is desired, SSPC-Paint 20 may be specified. This specification does not cover weldable preconstruction primers, such as SSPC-Paint 30, Weld-Through Inorganic Zinc Primer.  

About SSPC

Founded in 1950, SSPC is a nonprofit association focused on the protection and preservation of concrete, steel and other industrial and marine structures and surfaces through the use of high-performance coatings.

SSPC provides information and standards on surface preparation, coating selection, coating application, environmental regulations, and health and other issues that affect the protective coatings industry.

More information: www.sspc.org.

   

Tagged categories: Certifications and standards; Paint application; Primers; Specification; Specifiers; SSPC; Zinc-rich (inorganic); Zinc-rich (organic)

Comment Join the Conversation:

Sign in to our community to add your comments.

Polyval Coatings
POLYFLEX brand Polyurea

high chemical resistant membranes are used extensively to protect our environment in secondary containment applications.


Wasser High-Tech Coatings Inc.
Wasser Coatings Protect

some of the most important bridges in the country; learn about our NEPCOAT-approved system and our entire range of MCU & Polyurea coatings. 1-800-627-2968 www.wassercoatings.com


BASF
New resins from BASF will have metals loving water:

Excellent corrosion resistance, low VOC, high gloss, thin films basf.us/industrialcoatings
polyorders@basf.com
800-231-7868


Sherwin-Williams
Heat-FLex® Hi-Temp 1200

Improved Corrosion
Resistance
Enhanced Durability
Faster Shop Throughput


Blastox/The TDJ Group, Inc.
Blastox - One Step
Lead Abatement

Don't waste $$ on added labor steps with other methods. Don't mix, meter or apply at the job-site. Avoid strict hazardous waste rules.
Let your painters paint!


ITW Binks
Built for Tough Jobs

From Epoxies to Urethanes to other high solid coatings, the new Binks Airless 75 delivers a great finish using an ergonomic design. Visit binks.com for more information.


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.

 
 
 
Technology Publishing

The Technology Publishing Network

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

 
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 2000-2014, 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