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Low solar absorbing (LSA) attributes are important for marine decking materials. Reduced solar heat absorption can not only improve the condition of living and working spaces beneath any deck, but also help protecting electronics and equipment. This article will review current LSA technologies and present a study on how to improve the solar reflectance and weather resistance of epoxy marine decking.
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Internal coatings stress (ICS) develops in coatings applied to a rigid substrates. During drying, volume changes due to solvent loss and/or cure induces stresses in the films. Differences in the thermal expansion coefficients of the coating and substrate also affect the ICS. ICS affects the interfacial adhesion and results in delamination once the stress exceeds the force of adhesion.
Field pH testing on vertical concrete prior to application of high-performance protective linings is primarily required to confirm the removal of deleterious substances following surface preparation. This paper explores the use of various in situ testing techniques for measuring surface pH on vertical concrete.
Real energy savings data for residential buildings is scarce and difficult to find. To address this concern, two identical houses were built in the outskirts of Monterrey, Mexico, where summer temperatures are usually very high (˜113°F). Energy consumptions using different waterproof coatings with different values of solar reflectance were evaluated.
A test methodology is shown for field application of electrochemical impedance spectroscopy (EIS). The method utilizes low-cost, accessible materials to secure a temporary solution cell to the infrastructure’s coated surface. A laptop computer provides the power source and operating system for the mobile potentiostat during EIS data collection. This data provides a quantitative measure of the coating condition. The objective of this work is to incorporate EIS testing into standard coatings inspection to estimate remaining service life for the intact coating, which improves coatings maintenance planning for facility owners.
Industries such as oil and gas, marine, cleaning and protective coatings face many changes and challenges from environmental, safety and other regulatory agencies. Most of these changes have to do with containment regulations and minimizing dust in open air blast environments. With these regulations now in place, contractors are looking for alternatives to traditional dry blasting.
Moisture testing of concrete substrates has become a common practice in the floor coatings industry. Even though most contractors and field technicians are capable of performing the testing, they don’t really understand what the data they are collecting means, other than the acceptance criteria established by the product manufacturer of the coating or flooring being installed.
The paper is an overview of the National Shipbuilding Research Program (NSRP) Surface Preparation and Coating Panel’s (SP&C) mission to reduce the cost of construction, maintenance, and repair of US Navy ships. The Panel’s “Specs to Decks” approach; research, evaluate, develop, and sustain current and emerging technologies that will reduce cost and maintain or enhance quality, serves as a rudder that guides the Panel’s performance.
Epoxy coatings are a mainstay of the protective and marine coatings markets. Used as intermediate coats over inorganic and organic zinc rich primers or used as direct-to-metal primers in coating systems, epoxy coatings are widely recognized for their versatility and the excellent corrosion resistance they provide. One drawback to current epoxy coating technology is that it requires separate packaging for the epoxy resins and the amide or amine hardeners because the chemical reaction between these materials causing the applied film to cure to a dry state would also cause the bulk material to gel if packaged together (pot life).
As VOC regulations continue to drive coatings development, waterborne alkyds are progressively being utilized further due to their attractive environmental profile. Advancements in waterborne alkyd chemistry have provided the first waterborne biobased resin for pavement marking coatings. Through strategic selection of alkyd monomers and the appropriate balance of the emulsification aids, a shear stable alkyd latex resin that shows exceptional performance in waterborne traffic marking formulas has been developed.
Quality Assurance/Quality Control (QA/QC), often referred to as inspection, is critical to the success of a protective coating or lining project. Several parties can and do get involved in inspection including the owner, specifier, third party inspector, general contractor, painting contractor, equipment supplier, and coating manufacturer.
The study objective was to evaluate the cost effectiveness and feasibility of a paint system warranty from a coatings manufacturer for a specified coating to be applied over steel with minimum surface preparation (without removing completely the existing coating or tightly adhering rust) and to evaluate the coating performance at the conclusion of the warranty period.