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The important factors which may influence the corrosion process are: a) Nature of the metal, nature of the environment and the corrosion products. b) Year upon year the cost of naval corrosion has increased until it is estimated today at 4 Download Free PDF Naval Corrosion--Causes and Prevention. CORROSION IS DEFINED AS THE. DETERIORATION OF A MATERIAL AND/OR. ITS PROPERTIES CAUSED BY A REACTION. WITH ITS ENVIRONMENT. Page 4. Why is Corrosion a MajorThermodynamic and Electrochemical Processes The corrosion process of metals is a natural result of the inherent tendency to revert to a more stable compound Causes of Corrosion. Metal corrodes when it reacts with another substance such as oxygen, hydrogen, an electrical current or even dirt and bacteria. These additional factors influencing corrosion are temperature, humidity and rainfall. The relative corrosion rates for these environments are found in Table 1 It is generally marked by a pitted or rough metal surface. • Impingement attack - localized corrosion caused by turbulence or impinging flow. Generally there is