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The Federal Highway Administration, through its Innovative Bridge Research and Construction Program, requested research in the performance of paint coatings applied to bridges. The Maryland State Highway Administration tested two different, two ─ coat systems in a side-by-side comparison with its standard three ─ coat paint system consisting of organic zinc primer / epoxy polyamide intermediate / aliphatic urethane finish coat (currently the “State of the Art” system for most States).
The Occupational Safety and Health Act of 1970 (OSH Act) was passed to protect workers from death or serious harm and requires employers to provide their employees with working conditions that are free of known dangers. The Act created the Occupational Safety and Health Administration (OSHA), which sets and enforces protective workplace safety and health standards.
In today’s protective coating industry, there is a growing demand to proportion and spray 100% solids coatings that are high viscosity and composed of materials that make them compressible during processing. Epoxy intumescent fireproofing is one such material that starts as compressible in the pail and becomes more compressible when heated and agitated under air pressure.
Because process shutdowns are expensive, it is desirable to speed up the turn-around time when applying protective coating systems on concrete. Rapid installation of surfacing materials on concrete can be problematical due to inadequate surface preparation, residual moisture, low surface tensile strength, and poor compatibility between the concrete substrate repair materials and the protective coating system.
Although moisture in the air and on the surface has always been a concern, psychrometrics has been a confusing and misunderstood area of the industrial coating business. Psychrometrics (the study of water in the air) is used every day in the HVAC and humidity control industries and the mechanical engineer or refrigeration professional may have a clear understanding of the concepts used in this realm.
Corrosion protection at NASA’s Kennedy Space Center is a high priority item. The launch facilities at the Kennedy Space Center are located approximately 1000 feet from the Atlantic Ocean where they are exposed to salt deposits, high humidity, high UV degradation, and acidic exhaust from solid rocket boosters. These assets are constructed from carbon steel, which requires a suitable coating to provide long-term protection to reduce corrosion and its associated costs.
The seismic retrofitting of the County of Placer/Foresthill Road Bridge included replacing the gusset plates at the bolted connection points on the structure. Newly fabricated connection plates were prepared in the steel fabrication shop by abrasive blast cleaning and applying an inorganic zinc-rich primer. Existing connection plates were removed and the surfaces beneath abrasive blast cleaned and primed on-site with an organic (epoxy) zinc-rich primer. The connections were slip-critical.
Electrochemical Impedance Spectroscopy (EIS) has maintained a presence in protective coatings laboratories for decades. EIS is valuable in that it captures resistive and capacitive changes to a coating film as it is exposed to the environmental conditions that produce these changes, i.e., degradations. It also assists in ranking coating systems for their anticipated corrosion protection performance, complementing qualitative, visual observations.
This annual paper summarizes environmental, health and safety issues that may impact SSPC members. This paper discusses current and expected regulatory rulemaking, emphasis programs, enforcement initiatives or other similar topics.
Steel surfaces are frequently cleaned by abrasive impact prior to the application of protective coatings. The resultant surface profile, sometimes called an anchor pattern, is comprised of a complex pattern of peaks and valleys, which must be accurately assessed to ensure compliance with job or contract specifications.
Caretakers of outdoor monuments, sculptures and high-value architectural metalwork face formidable preservation challenges. Durable, low-maintenance coatings are needed that provide longer-lasting protection against corrosion and degradation, while being safe for the environment. We describe work done in collaboration with conservators at the Philadelphia Museum of Art, and Portland State University, to develop water-based fluoropolymer coatings that meet the critical needs of the conservation and architectural communities.