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Pittsburgh, PA, United States

Hall G.,Sauereisen Inc.
Journal of Protective Coatings and Linings | Year: 2011

Chemical industry experts suggest that a variety of polymer concretes can be used successfully to protect structures in aggressive corrosion environments when if the properties of the polymer concretes are understood and the correct product is specified. Polymer concretes provide a value-added solution for some of the most difficult corrosion problems when properly designed, specified, and installed. Engineers, architects, plant managers, maintenance personnel and contractors need to have an understanding of their capabilities and limitations to realize the added value and to take advantage of it. The chemical resistance and physical properties of such concrete materials are influenced by the binder and the fillers. Epoxy-based polymer concretes provide excellent physical properties, with compressive strengths of around 17,000 psi. Source

Maley B.,Corrosion Probe Inc | Kelso S.,Sauereisen Inc.
Journal of Protective Coatings and Linings | Year: 2011

The advantages and disadvantages of strategic corrosion protection methods, the rationale for the systems selected, and the challenges overcome during the 10-month installation period of co-lining system for the corrosion protection for two newly constructed segmented tunnels, are discussed. After evaluation of corrosion protection options, specifications of coating system were defined. The challenges such as filling of segment joints, bolt pockets, and grout ports for this project were addressed by customized solutions for each of the construction details and increase in jobsite efficiencies. To provide a smooth tunnel surface, pockets that housed the bolts were filled and struck flush using either the same high-build epoxy filler material utilized to fill the segment seams or a compatible, fast-setting portland-based cementitious resurfacing material. Source

Hall G.,Sauereisen Inc.
Journal of Protective Coatings and Linings | Year: 2013

Polyester and vinyl ester coatings and linings have a long and successful history of corrosion resistance in a wide range of chemical and thermal environments. They possess high mechanical strength and adhesion as well as low permeation and excellent chemical resistance, even in elevated temperatures. A variety of coatings and linings utilize many different fillers and reinforcements that help impart specific properties. Care must be exercised in using these materials over substrates that move and over concrete that might have, or might develop, cracks. It is strongly recommended that the user consult with the coating/lining manufacturer for each application to ensure that the system will perform as expected and that operating conditions will not result in premature failure. Most important, protection of workers, the public, and the enviornoment must never be ignored. Source

Hall G.,Sauereisen Inc.
Journal of Protective Coatings and Linings | Year: 2012

Since ancient times, man has built chimneys. In the early- to mid-20 th century, power plant engineers began specifying refractory brick construction, ultimately with an acid-resistant sodium silicate mortar for the chimneys or stacks as they are called. Later variations saw the dominance of potassium silicate mortars. In 1953, a gunite-applied, acid-resistant refractory was introduced. These gradually changed to acid-resistant gunite applied over high-temperature and acid-resistant membranes in the 70s. In the latter third of the 20th century, vinyl ester and epoxy linings were being used for corrosion protection because of the introduction of FGD scrubbers. The linings can provide excellent chemical resistance and are flake- and/or fiber-filled to enhance permeance and flexural properties. If the EPA wins the ability to regulate GHG and carbon footprints, CCS will force yet another paradigm shift. The coatings industry will need to respond by developing new products to help protect this vital part of the infrastructure. The lower installation cost associated with organic high-build coatings has made them the preferred method for achieving corrosion protection today. Source

Ramsey H.M.,Sauereisen Inc. | Kelley D.H.,Ashland Inc. | Johnson T.L.,Ashland Inc.
NACE - International Corrosion Conference Series | Year: 2013

In order to meet more stringent EPA guidelines, the coal-fired power industry must now build or retrofit their facilities with flue gas desulfurization (FGD) systems. A critical part of these systems is the FGD absorber. A common building material for the absorbers has been duplex UNS S32205/S31803 and UNS S32550 alloys; however, the UNS S32205/S31803 alloy is showing signs of premature corrosion throughout the industry. The root cause of this corrosion is still under investigation, but with some absorbers lasting less than 18 months, a repair regimen is sorely needed. This paper will discuss the issues surrounding UNS S32205/S31803 alloy corrosion as well as methods to rehabilitate and protect both old and new absorbers with epoxy vinyl ester polymer lining. The paper will also review the proper cleaning, surface preparation, application process, and choice of epoxy vinyl ester polymer lining to protect UNS S32205/S31803 alloy and prevent its premature breakdown in this environment. © 2013 by NACE International. Source

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