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Encyclopedia of corrosion technology by Philip A. Schweitzer

By Philip A. Schweitzer

Offers info on corrosion invaluable for knowing and fixing expensive and strength detrimental corrosion-related difficulties. This quantity offers alphabetically geared up insurance on such components as: every kind of fabrics effected by way of corrosion; key terminology linked to the corrosion approach; a variety of forms and kinds of corrosion; the main generic development fabrics and their corrosion resistance features; and techniques for controlling and fighting corrosion, parts of program and stipulations for powerful security.

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It is fired at higher temperatures and for longer periods of time than the same clay when used to make "common" brick. Acid resistant brick is covered by ASTM Specification C-279. The two most commonly used bricks are red shale and fireclay. These are used for all applications except those where the exposure is to strong alkali or hydrofluoric acid. Of the two, the most frequently used is red shale. Page 2 Red Shale Brick Red shale brick is usually described as meeting Type L in ASTM C-279. These bricks provide a lower absorption rate than fireclay and are usually somewhat more brittle.

The principal ore is bauxite. The high resistance of aluminum to corrosion in many environments is the result of the very rapid formation of a thin, compact, and adherent oxide film. This film, which is formed in air, prevents the further corrosion of the underlying metal and is stable in the pH range of approximately 4 to 9. At lower and higher pH values the film will dissolve with some notable exceptions. It is stable in concentrated nitric and which has a pH of 1 and concentrated ammonium hydroxide which has a pH of 13.

These brick are usually selected for outdoor exposures where rapid thermal changes occur, since they are less brittle than the shale brick. Since they also have a low iron content they are used in process equipment where this characteristic is important in maintaining product purity. 5+) and hydrofluoric acid, or fluoride salts in an acid medium. These bricks are more shock resistant than either red shale or fireclay brick, permitting them to be used in areas where rapid pressure changes take place, a condition that can cause shale or fireclay to spall.

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