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Fundamentals of Metallic Corrosion: Atmospheric and Media by Philip A. Schweitzer P.E.

By Philip A. Schweitzer P.E.

Knowing corrosion is key for choosing and retaining gear and structural parts that might stand up to environmental and strategy stipulations successfully. basics of metal Corrosion: Atmospheric and Media Corrosion of Metals specializes in the mechanisms of corrosion in addition to the motion of assorted corrodents on metals and their alloys. The e-book is customized to help experts learning corrosion in steel fabrics or utilizing steel materials.The first chapters describe assorted different types of steel corrosion and the consequences of atmospheric corrodents similar to sulfur-, nitrogen- and chlorine-containing compounds. in addition they speak about the corrosive results of weathering stipulations and common media together with water, acids, salts, organics, and gases. the rest chapters are divided into steel varieties and their alloys. They hide stainless, ferritic, and martensitic steels in addition to nickel alloys, copper, copper alloys, aluminum, titanium, zinc, and lead. every one bankruptcy examines the corrosion strength of the cloth and offers easy-to-use charts that designate their compatibility with chosen corrodents. The e-book additionally compares the corrosion resistance of nonferrous metals and alloys.

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Extra resources for Fundamentals of Metallic Corrosion: Atmospheric and Media Corrosion of Metals

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Stresses, either residual or applied, impact the mode of corrosion and lower the energy effect for corrosion to begin. Stress is a requirement for SCC or corrosion fatigue, but can also influence the rate of general corrosion. Finally, time is a factor in determining the severity of corrosion. Corrosion rates are expressed using a time dimension. Some corrosion processes are violent and rapid, whereas most are so slow as to be imperceptible on a dayto-day basis. Equipment is planned to have a useful service life.

Hydroxide anions also migrate, but they are less mobile than chloride ions. The metal chloride formed hydrolyzes to produce metal hydroxide and hydrochloric acid: MCl C H2 O/ MOH C HCl The nascent hydrochloric acid destroys the passive film and accelerates the rate of dissolution of the metal inside the crevice. The cathodic reduction remains restricted to the areas outside the crevice that remain cathodically protected. 8243—CHAPTER 1—3/11/2006—16:52—TRGANESH—14181—XML MODEL B – pp. 1–37 12 Fundamentals of Metallic Corrosion: Atmospheric and Media Corrosion of Metals Several steps can be taken to prevent and/or control crevice corrosion: 1.

MIC can result from: 1. Production of sulfuric acid by bacteria of the genus thiobacillus through the oxidation of various inorganic sulfur compounds; the concentration of sulfuric acid may be as high as 10–12% 2. Production of hydrogen sulfide by sulfate-reducing bacteria 3. Production or organic acids 4. Production of nitric acids 5. Production of ammonia There are many approaches that may be used to prevent or minimize MIC. Among the choices are: 1. Material change or modification 2. Environment or process parameter modification 3.

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