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A case study is presented for the Life Cycle Costing (LCC) analysis to quantify and compare different corrosion mitigation methods. Strategies to minimize the costs due to corrosion are included.
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The aggressiveness of the atmospheric environment can be assessed by measurement of climatic and pollution factors, or by determination of the corrosion rates of metals and coatings. The latter is a low cost technique which has traditionally been employed at single isolated sites with different types of environments. This approach does not, however, adequately portray the levels of corrosivity across a city or region which can vary by an order of magnitude. A technique has been devised at the Commonwealth Scientific and Industrial Research Organization (CSIRO) in which specimens are exposed across a grid of contiguous sites and the results computer contoured to generate corrosivity maps. A new method of h hyperbolic interpolation of the data has been developed to model corrosivity approaching the coastline. The paper presents results from surveys around an industrial point source of S02, conducted over two different periods. The technique of corrosivity mapping was demonstrated to be a sensitive indicator of localized zones of enhanced corrosion, and the two maps reflected changed conditions in the plant's operation in the two periods. The paper also discusses corrosion mapping in countries other than Australia and examines the costs of such exercises and the potential savings they can provide.
Corrosion significantly impacts safety, availability and sustainment costs of U.S. Air Force (AF) systems and equipment. System downtime due to corrosion maintenance decreases the availability of systems to perform their national defense mission and drives the need for more aircraft and associated logistics tail. In addition, the AF spends about $5.5 Billion per year, about 21 percent of the annual AF maintenance budget, on corrosion maintenance.
Who can benefit from a coatings program? Owners? Coating Manufacturers? Services Contractors? The answer is really - everyone. Developing Goals, Strategies, and Action Plans will reduce your workload and provide for continuous improvement.
The U.S. Air Force will never eliminate corrosion in aerospace systems, but synchronized efforts can help sustain positive trends in conserving maintenance dollars, increasing system availability, and reducing corrosion-related mishaps. The AF Corrosion Control and Prevention Executive established an aggressive goal to reduce corrosion’s effects by 20% by 2025: a 20% reduction in corrosion maintenance costs; a 20% reduction in non-available hours (NAH) due to corrosion repairs; and a 20% reduction in corrosion-related safety mishaps.