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In November 2004 ISO 19840 was published to provide a consistent method for the measurement of coatings applied to structural steel for corrosion prevention. This new standard includes methods for the adjustment of gauges to take account of surface roughness, the designation of inspection areas and the use of acceptance criteria.
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Protective coatings are ubiquitous on offshore oil structures. As with most situations, the use of coatings is driven by myriad factors unique to the industry. The paper will provide an overview of the types of structures, the coatings used in different zones of the structures, and the pragmatic and regulatory criteria which influence the coating process.
The purpose of this study was to determine the actual service life of some commonly used bridge coating systems. A study authored by Gordon H. Brevoort and updated by KTA-Tator, Inc. in 1996 (1) provided a table of projected service life based largely on a survey of coating manufacturers. Are industry wide predictions of coating life accurate?
A case study of how poor initial quality control resulted in a complete coatings rework of the underwater bottom (exterior hull) of a large Floating Storage Unit (FSU) and how a good quality control program, during rework, resulted in the documented long term performance of the second application underwater hull coating system.
The objective of this study was to examine the effects of an ultra-high pressure (UHP) waterjetting surface preparation (>25,000 psi) on the performance properties of select marine/offshore coating epoxy systems. Uncoated steel panels had been allowed to rust in an outdoor atmospheric environment and then were subjected to UHP waterjetting
The twenty-first century presents a major challenge to coatings manufacturers. The amount of solvent allowable in many coatings has been reduced considerably. In order to attain these lower VOC’s, coatings formulators are searching for resins that have low VOC demand, as well as ways of formulating that can replace the high volumes of solvent used in the past
Moisture is a key component of concrete. It is critical to the curing and strengthening process of the product. It is however the use or misuse of this critical component that may cause expensive and unavoidable problems over the life of the floor
A review of galvanized steel and painted galvanized steel processes is provided, as well as the fundamentals and requirements for painted galvanized steel products. The corrosion processes found with both galvanized steel and painted galvanized steels are discussed.
Moisture related problems for non-permeable flooring systems have plagued the construction industry for decades. Lower volatile organic compounds limitations and expedited construction schedules have increased the occurrences and awareness of the issue.
Choosing the right approach to water tower maintenance maximizes budgets and service life.
Concrete and other cementitious surfaces are porous materials that will allow water and soluble contaminants to penetrate the structure leading to degradation. The effects of degradation can include efflorescence, laitance and physical defects such as cracking and spalling. Waterproofing concrete can protect it from freeze/thaw cycles, increase chemical resistance, and provide protection to imbedded reinforcing steel.
The Federal Highway Administration has a top-level technology goal targeted toward the development and deployment of the “Bridge of the Future.” This is a conceptual short span bridge that demonstrates significant improvements over the current state of the practice – particularly with regard to ease and speed of construction and long-term durability.