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HISTORICAL DOCUMENT. Ordering, cleaning, coating, inspecting, handling, transporting & installing steel reinforcing bars. Fusion-bonded epoxy powder coatings by electrostatic spray. For owners, architects, engineers & contractors.
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This AMPP standard practice provides guidelines for qualifying personnel as abrasive blasters and coating and lining applicators in the rail industry. The intent of this standard is to foster personal growth of the individuals and technical continuity in the areas of surface preparation and coating and lining of railcar equipment. This standard outlines a formal system of training and qualification that recognizes the knowledge, skill, and technical competency of the individuals engaged in this work.
This standard is intended for use by employers, managers, and others in the rail industry who have a need for such guidelines in their efforts to provide suitable training and qualification of their abrasive blasters and coating and lining applicators to comply with regulations, meet customer requirements, and enhance the effectiveness of their operations.
HISTORICAL DOCUMENT. Coatings application to the interiors of rail tank cars handling concentrated sulfuric acid at ambient temperatures. Inspection of completed coating. Testing. Surface prep. Materials Inspection.
This standard provides two separate test methods for evaluating protective coatings on any metallic substrate, such as steel, copper, aluminum, etc., so that the factors of both chemical resistance and permeability can be considered. The results obtained should give a good indication of what would happen on exposure to similar service conditions.
Protective coatings, as referred to in this standard, may be applied in liquid form (solution, dispersion, etc.); or dry form (powders); using spray, dip, roller, brush, trowel, or other appropriate application techniques.
When protective coatings are to be applied to structures, it is important that the surface is clean and dry if premature failure of the coating is to be prevented and the full coating service life achieved. In many situations for both new build and repair of structures, blast cleaning of the surface is required to remove contamination and to create an anchor pattern to enhance the adhesion of the coating system to the substrate.
Solventborne 2-pack (2K) epoxy-amine coating systems have for many years been commonly used to formulate high performance protective coatings such as metal anti-corrosion primers and concrete floor coatings. However, due to the concerns linked to their high volatile organic compounds (VOC) contents, waterborne alternatives with comparable performance are needed.
Corrosion’s destructive effects on critical steel infrastructure have costly economic and securityimplications for the United States. According to a NACE International report from 2001, the annualcorrosion costs in the United States industrial sector were $47.9 billion per year, with the largest portionstemming from the maintenance of critical utilities such as gas, water, electric, and telecommunications. Catastrophic failure due to corrosion jeopardizes the resilience of critical utilities, risking the interruption of service to millions and creates weak-points the nation’s homeland security.
Hardness and corrosion resistance of electroplated nanocomposite coatings are reported here in light of process parameters such as current density, boron addition and diamond nanoparticles. A boron source that enables greater incorporation of B in the coating was used.
Environmental, market, and cost pressures have led to the development of alternatives to conventional 2K polyurethane topcoats, including isocyanate-free binders. For example, 1- and 2K coating systems based on alkoxysilane chemistry find increased use in protective coatings.
Gel coat has traditionally been used in environments where color, gloss and relative long-term performance are important. This premise is still true today; however, a much more advanced technology has been developed that provides improved characteristics of color and gloss stability, higher mechanical properties and zero Volatile Organic Compounds (VOC’s).
Coatings designed for heavy duty applications in the maintenance and protective coatings market are exposed to aggressive environments such as aggressive chemical solvents, marine atmospheres, UV light, abrasion, among others. In the US as well as other areas of the world, coatings designed for these applications have been primarily solvent-borne.
In 2003, the City of Anoka, Minnesota completed the reconditioning of its 400,000-gallon legged water storage tank. A 2-year warranty inspection followed in 2005. The project was introduced in the May 2007 issue of the Journal of Protective Coatings. Its significance was that reconditioning of interior surfaces, above the high waterline, were treated with a trial application of three coating system solutions.