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Introduction to Design and Corrosion
Recognizing the symptoms and mechanism of a corrosion problem is an important preliminary step on the road to finding a convenient solution. There are basically five methods of corrosion control:
In the totality of an engineering design the metal and its fabrication are important parts, but the detailed choices may be determined by considerations other than those involving corrosion. Thus the strength/weight ratio, elastic modulus, electrical or thermal conductivity or other considerations may determine the nature of the metal or alloy to be used in a particular application. Similarly the physical properties of the alloy, the size of the structure, the number of components and so on, will usually determine the mode of fabrication, with economic considerations applied overall.
Where likely corrosion problems may only be considered as part of the design after these primary requirements have been met, the freedom of action in relation to corrosion prevention will necessarily be somewhat restricted. But even where likely corrosion problems are of primary concern in material selection it is important to realize that, for example, the use of a stainless steel instead of a mild steel will not always diminish corrosion problems, because the modes and rates of corrosion are not constant for a given material, but rather they are dependent upon the environment to which it is exposed as illustrated here:
See also:
Aircraft design considerations, Avionics design guidelines, Corrosion control in engineering design, Corrosion services, Tank design, Supporting structures, Heaters and inlets, Pipe welds
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