According to NACE, Corrosion is the deterioration of a substance,
usually a metal, or its properties because of a reaction with its environment.
Direct and indirect economic losses derived from corrosion include the following:
Uniform or general corrosion is the most classical form of corrosion, but is not always the most important in terms of cost or safety. The consequences of uniform corrosion are a decrease in metal thickness per unit time or a more or less uniform deposit of these corrosion products in the surface of the metal. Uniform corrosion can be limited or prevented by an appropriate choice of material or modification of the medium among other solutions. Using the right materials and processes can help to beat corrosion problems throughout the industries we serve.
Galvanic corrosion can be defined simply as being the effect resulting from the contact between two different materials in a conducting corrosive environment.
In many cases, galvanic corrosion may result in quick deterioration of the least corrosion resistant material, and can lead to fatal failure. Common methods of minimising and preventing galvanic corrosion are choosing material combinations in which the constituents are all made from the same material or different materials as close as possible in the corresponding galvanic series, avoiding an unfavourable surface area ratio, using protective coatings, or controlling the aggressiveness of the environment.
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