Surface integrity aspects and their influence on corrosion behaviour of ground surfaces

The nature of the surface that results from manufacturing processes has long been recognized as having a significant impact on the product performance, longevity and reliability. Surface alterations may include mechanical, metallurgical, chemical and other changes. These changes although confined to a small surface layer, may limit the component quality or may, in some cases, render the surface unacceptable. A basic understanding of the changes in the condition of the surface is very much required if improvement in product quality is to be attained. Surface integrity reveals the influence of surface properties and condition upon which materials likely to perform. It bas long been known that the method of surface finishing and the complex combination of surface roughness, residual stress, cold work, and even phase transformations strongly influence the fatigue and stress corrosion behaviour of materials. A detailed experimental study and analysis of the corrosion aspects on ground components is presented in this article.