Selection of Coating Systems

Environment consideration is critical to the proper selection of coating system. For instance, for structures close to seawater, an inhibitive primer of proven quality needs to be considered and preferred over a vinyl primer. The coating components should be compatible with the seawater environment. For a desert environment, the system needs to withstand high wind and fine dust particles to avoid erosion and chalking of the coating. 

The pollution problem may be caused by a large emission of C and CO2 from automobiles, in certain cases SO2 from refineries. In agricultural areas, ammonia may contaminate the atmosphere. These factors deserve consideration before the selection of coating system. 

Care in the selection of coating systems will help to minimize damage to coatings before erection. Features that can be incorporated in the design of the fabrication and other measures that can be adopted to further reduce the effects of mechanical damage are as follows ... 

Another significant environmental factor for vapor-phase applications is humidity. The ubiquitous nature of water vapor requires development of means to exclude or correct for interferences from water [92a,b]. Careful selection of coating materials, for example, can minimize the effect of water vapor on the sensor response. Alternatively, a coating with appropriate sensitivity to water can be used in the development of correction algorithms [93]. Other instrumental or system approaches, such as preconcentrators or sensor arrays with pattern recognition [94a-c], will be discussed in Section 5.5 and in Chapter 6. 

R. E. Sparks, I. C. Jacobs, Selection of Coating And Microencapsulation Processes, Controlled Release Delivery Systems, Marcel Dekker, Inc., USA, 1999, pp. 3-29. 

Once developed, any assay system should be optimized to provide the best possible sensitivity. One important variable affecting ELISA performance is the selection of coating antigens. 

Two strategies are currently in use to improve the sensitivity and selectivity of SAW sensor systems. One involves the selection of coatings that exhibit a unique chemical selectivity for the analyte vapor. It is often observed that for a particular vapor/coating interaction, the specificity and reversibility of the interaction are inversely related. That is, highly specific interactions often involve large bonding energies that are not spontaneously reversible. Such... 

To aid in their selection, coatings and finishes will be classified by use in finish systems, physical state, and resin type. Coatings and finishes are also classified by their use as electrical insulation. It is not the intention of this chapter to instruct the reader in the chemistry of organic coating but rather to aid in selection of coatings and finishes for specific applications. Therefore, the coating resin s raw material feed stock and polymerization reac-... 

It is the most important factor for the selection of coating. The cost is related to the importance of the structure to be coated and life of the coating system. The life of the system would, in turn, depend on several factors, such as surface preparation, quality of the coating, proper application, proper curing, maintenance and monitoring. The cost factor is important but not a deciding factor in areas of civil and military strategic importance. Frequency of maintenance is an important factor. 

P.J. Tunturi and J. Radio. Expert system for selection of materials and coatings in ventilation sysrem.s in pulp and paper indu.stry. In A. J.insson and L. Olander, eds. Ventilation 94 Proceedings of the 4th International Symposium on Ventilation for Contaminant Control, pp. 149-1.52, 1994. 

A wide variety of protective coating types and systems is available for corrosion control on external and internal surfaces of structural and process plant in marine and offshore engineering. These are discussed in detail elsewhere in this text, and the purpose here is to highlight the critical importance of certain design and related operational aspects which affect both the selection and performance of protective coating systems. The following design considerations should be made ... 

The thermal and UV resistance will depend on the stabiliser systems used. The hardness of the coating will depend on the amount and type of plasticiser used. Correct selection of the plasticiser can permit the use of the plastisols at high or low temperatures, provide fire resistance or oil resistance. Plastisols can be produced in a range of gloss levels from 80 units down to 10 gloss units. 

Care in designing and conducting the test in no way reduces the need for discrimination on the part of the person using the test data in the selection of a coating for a particular purpose. Test environments must reflect the deteriorating influences of the service for which they are applicable. A coating system cannot reliably be selected for service in a chemical plant on the basis of performance determined in a rural atmosphere. 

Test methods for corrosivity of solvent systems for removing water-formed deposits Recommended practice for determining corrosivity of adhesive materials Guide to the selection of test methods for coatings used in light-water nuclear power plants... 

Coatings, cathodic protection, and chemical additives are used extensively to prevent internal and external pipeline corrosion. The excessive use of incompatible chemical additives has caused severe problems in gas-transporting systems. Costs arising from these problems often exceed the costs of the chemicals themselves. The careful evaluation and selection of chemical additives can minimize these problems and reduce operating costs [I860]. 

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