This paper describes the relevant characteristics of available joint coating types and examines different testing protocols to explore these characteristics. The objective is to assist in the selection of appropriate, practical, cost effective girth weld protective coatings. that will provide good long-term corrosion protection.
A building, partially clad in fluoropolymer coated aluminum panels, was observed to have an aesthetically unacceptable appearance while still under construction. Once installed on the building, many of the panels exhibited a vertical streaked appearance under certain conditions. When the panels were at ground level, or when the sun was bright, the streaky appearance was not noticeable. However, in conditions of low light, such as during early morning, dusk, or on cloudy days the streaky appearance was reported to become apparent. A visual mock-up, consisting of multiple coated panels that had been approved by the architect as a guide to the anticipated appearance were also present on-site as a reference. This visual mock-up was used as a reference for acceptable appearance of the coated panels.
Ours is an age of stringent VOC regulations and one of the positive responses from coating formulators has been the advent of innovative high solids coatings that contain exempt solvents. While proper surface preparation for applying lining systems has always been crucial to long term coating success our field experience has shown that this is all the more the case with coatings formulated with one or more exempt solvents.
This paper will focus on the application of polymeric coatings and linings, which include, but are not limited to, polyamine and novolac epoxies and vinyl esters. These materials are delivered to the job site in buckets or bags and are mixed and applied on-site, and it is the responsibility of the owner, engineer and material supplier to determine the type of material and coating system to specify for any particular project.
This NACE/EFC standard is considered as the basis for the cleaning, surface preparation, and application of paint and coating systems to Navy ships used in marine environments for New Build, and during Life Cycle maintenance and permanent repair. It is intended for use by naval corrosion control personnel, coating applicators, and coating manufacturers. It covers coating materials, coating test protocol and acceptance criteria, surface preparation, coating application, quality assurance and control, and repair methods. Its purpose is to facilitate more effective corrosion protection of Navy ships and support inter-operability requirements by presenting reliable information and providing guidelines for coating manufacturers and shipyards to develop more durable specifications.
This standard replaces NATO Allied Engineering Publication (AEP) 59.
In some quarters of society there is a public outcry regarding the significant corrosion, coatings deterioration and safety concerns associated with North American bridges. Against this backdrop, this paper describes the application more than 20 years ago of an innovative coating system for the rehabilitation and lead abatement of a major truss bridge superstructure in Alberta, Canada.
Thermal Imaging, or Infrared Thermography, is an evaluation technique that has been used in the general construction industry for many years. Often times this is used to evaluate the degree of heat loss in a structure for insulation purposes, or for detecting water leaks behind a closed wall area. Some recent cases have also shown this technique applicable for testing strength of concrete structures.
The Springhouse Country Market and Restaurant has been a local icon for over 40 years. The commercial bakery floor had been covered for years with a commercial sheet vinyl that would fail in spots due to the infiltration of water and cleaning materials at the seams. This resulted in the need to repair the sheet material several times which created a patchwork effect. Finally, the owner reached out to a flooring professional to discuss a new renovation solution.
Galvanized mast arms support uncounted numbers of traffic signals and signage throughout the United States. The proportion of these that have a “duplex” coating system (both galvanizing and organic coatings) is unknown. However, the number is surely significant, and the number of coating system failures is also significant.