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Legacy SSPC Conference Papers
This is the final paper in a series of papers that discusses weathering performance of 2-component (2K) polyurethane topcoats used in corrosion protective coatings applications, e.g., bridges, marine, stadiums, etc., with emphasis on the key formulating variables affecting performance.
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Third-party paint inspection contracts provided an immediate, tangible benefit in supplying a qualified, certified coating inspector full-time to a painting project. Inspectors could be rapidly deployed and provided someone to the project with broad experience in painting projects; however, simply providing a third-party contract paint inspector to a project did not always ensure the project was completed properly.
This presentation - looks at the - process behind proposals, submittal practices, evaluation and value proposition of alternative protective coatings systems to conventional specified systems. Currently, there are many new coatings solutions and technologies that offer savings in time and dollars over older, though proven, technologies.
A five-year coatings research project was initiated by the Pennsylvania Department of Transportation in 1986 to evaluate the performance of an organic zinc rich coating system. The coating system consisted of a moisture cured urethane zinc rich primer, an epoxy intermediate, and an aliphatic polyester urethane finish coat. The system was applied to the Windgap Bridge located in McKees Rocks, Pennsylvania (near the City of Pittsburgh) in 1986 and 1987.
Extreme temperatures, rain, and freeze thaw cycles can all attack structures causing corrosion and therefore high maintenance costs. The UK DOT ensures maintenance is kept to a minimum by protecting its bridge stock using an effective waterproof coating which meets the exacting standards specified in BD47. A number of polyurethane based waterproofing systems have now met this standard. The inherent properties, ease of installation and long-term protection offered by polyurethane systems make them extremely popular amongst client authorities across the world.
The combination of an anionic primer layer with a cationic topcoat consist an ion barrier provides corrosion protection without using conventional anticorrosion pigments. The primer inhibits the anodic dissolution of the metals, and the topcoat rejects the aggressive anions from the environment entering the coating-metal interface.
Customers equate a good, strong image with professionalism. The recent trend to improve one’s appearance forms a backdrop for ways to improve how you, your staff and your business are viewed by your customers, the community and your competition.
In 1998, 10,000 square feet of epoxy, decorative quartz flooring was specified for a vivarium at a major University on the West Coast. This installation was performed by the material manufacturer’s certified contractor and was completed in November 2000. A few weeks after installation bubbles and blisters appeared. When the blisters were punctured they contained liquid. As anticipated, the moisture vapor emissions were confirmed to be 4 to 9 lbs in excess of the manufacturer’s recommended maximum of 3 lbs
Here’s a practical reminder about regulations and practices for protecting painters from falls.
On November 4, 1993, OSHA’s Lead in Construction Standard became the law of the land. Initially, (and to some extent today) the small residential contractor community reacted with complete outrage due to marketability fears, many claiming that they would simply stop working on “old houses.” Industrial contractors along with the larger residential and commercial contractors often at first ignored or complied in a lackadaisical manner with these laws, continuing to work “as it’s always been done.”
A series of accidents involving falls from or in water tanks has highlighted inadequacies in tank design and a potentially greater problem. The rescue may be more dangerous than the original accident, with the potential for more loss of life or injury.
Materials properties that are used in specific oil and gas environments are de-rated due to the risks associated with hydrogen embrittlement cracking. In oil production environments the concern is for the onset of stress corrosion cracking (SCC), while in seawater environments the concern is for Hydrogen Induced Stress Cracking (HISC). Both are hydrogen embrittlement phenomena with the distinction being the source of hydrogen for each. In SSC the source of hydrogen is from the presence of H2S in the oil production fluids, and in HISC the source of hydrogen is from the dissociation of water from the cathodic protection system. This paper is focused on the latter phenomena and aims to characterize the susceptibility of carbon alloy steels as applied in fastener applications, in a seawater environment under cathodic protection.