Type of Corrosion

May 1st, 2015
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Uniform corrosion is characterized by corrosive attack proceeding evenly over the entire surface area, or a large fraction of the total area. General thinning takes place until failure. On the basis of tonnage wasted, this is the most important form of corrosion.

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Type of CorrosionBy felipetrujillo Types of Corrosion1. Discuss the major types of corrosion.Uniform Corrosion:Uniform corrosion is characterized by corrosive attack proceeding evenly over the entire surface area, or a large fraction of the total area. General thinning takes place until failure. On the basis of tonnage wasted, this is the most important form of corrosion. (corrosion-doctors.org) This reminds me of some of the contractor specs I have seen for just this type of corrosion. Many of the clarification mechanisms I have seen specs for require a safety factor that if a 1/4 of the total cross section of each member were to corrode away that the mechanism would still be strong enough to take the load. These mechanisms are usual in a very acidic, completely submerged environment, so this would make a lot of sense for a long salting system. Erosion Corrosion:Erosion corrosion is acceleration in the rate of corrosion attack in metal due to the relative motion of a corrosive fluid and a metal surface. The increased turbulence caused by pitting on the internal surfaces of a tube can result in rapidly increasing erosion rates and eventually a leak. (corrosion-doctors.org) An example would be water running over a dam, usually a movable gate. Another example would be an impeller in a clarification tank for mining purposes. I have experience with these and the motion of the spinning impeller is the most damaging. I have seen the corrosion patterns in the metal f

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