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Asset owners, engineers, consultants, coating contractors, inspectors, and others are specifying allowable levels of surface soluble salts to prevent premature coating failures. The purpose of this standard is to provide guidance about the number of and locations for soluble salt tests on steel surfaces.
This standard establishes siting and frequency requirements for soluble salt testing before the application of a subsequent coating system to previously coated substrates and replacement substrate material. It does not include allowable limits of soluble salts, which are typically addressed by the procurement documents or the coating manufacturer’s documentation.
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This paper looks at the measurement of both profile and roughness on metal surfaces prepared specifically to receive a coating system in order to protect it from corrosion. The difference between roughness and profile is discussed, whether one is more relevant than the other, and the merits of the different measurement methods for both parameters.
The polyurea technology has been developed by Texaco chemical in the 80’s. First developed for the reaction-injection-molding (RIM), it has been adapted for spray application. The development in the spray equipment in the 90’s has enabled the commercialization of 100% solid polyurea spray elastomeric coatings.
This paper discusses the use of Master Painter Institute (MPI) paint standards and systems to select and procure paints for the protection and beautification of commercial buildings. Background on MPI and an explanation of how to use its paint standards is provided, along with instructions for using MPI manuals to choose coating systems for building environments.
Often times, protective coatings for equipment and packages come as an afterthought; therefore, a Coatings Specialist is not always included in early purchasing discussions. Lack of the Coating Specialist participation in the preliminary workflow does not necessarily equate directly to a “bad outcome”, however there are fundamental details which, if highlighted early, can make a significant difference in the procurement process resulting in cost savings and competitive bids.
Handling and transportation of finish coated steel from the fabrication shop to the project site is impacted by the length of time that the finish coat must dry. Known as shop-field throughput, a reduction in the dry time required prior to handling (without compromising performance), as well as a minimization of handling damage can greatly reduce project costs.
This updated NACE International standard test method specifies test methods to evaluate the performance of liquid coating systems for seawater immersion services. This test method is intended for use by facility owners and coating manufacturers.The test method covers liquid exterior protective coating systems for offshore platform steel structures, piers, docks, pilings, subsea valves, and wellheads at normal seawater temperature.
Included are four test methods—including cathodic disbondment, seawater immersion resistance, aging stability, and edge coverage—used to evaluate coating systems. The test method also includes two tables; Table 1 details fingerprinting of coating materials, and Table 2 details the test panel geometry, size, substrate material, and minimum quantity.
The program focuses on aiding an engineer, contractor, or decision maker in selecting the most appropriate type of traffic bearing coating system for a given application for parking structures. The program reviews the various type of traffic bearing coating systems that are offered in today’s market, the pros and cons of each and how the parking structure construction type (precast, cast in place, etc.) may affect performance of these systems.
Pre-construction primers (also known as shop primers or pre-fabrication primers) are very thin films applied to blast cleaned steel plates and shapes to provide preservation of the blasted steel during the shipbuilding or construction process. SSPC is developing an industry guide document containing information regarding the use of pre-construction primers (PCP) on structural steel in shipbuilding.