E. Rabald (Auth.)'s Corrosion Guide PDF

By E. Rabald (Auth.)

ISBN-10: 0444404651

ISBN-13: 9780444404657

ISBN-10: 0444600051

ISBN-13: 9780444600059

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Storage and transportation tanks (I). Acetylation apparatus for cellulose acetate, pipelines, centrifuges for moist (acid and anhydride) cellulose acetate (Π). At 700 °C vapours are catalytically decomposed. + 132 °C, strong agitation, 98% acetic anhydride + 2% acetic acid + potassium permanganate (II). , 50% acetic anhydride -f- 50% acetic acid, rapid agitation. 023 mm/year. (+) 640 °C, pressure 15 psig, 40% acetic anhydride + 36% acetic acid + 20% water. S. type 316). p. Pumps, valves. + 70 °C, rapid agitation, 65% acetic anhydride + 35% acetic acid: steel with 29% Ni, 20% Cr, 3% Cu, 2% Mo.

At 300 °C catalytic decomposition of vapours of acetic acid. , vinegar and other kinds of acetic acid by fermentation: Inconel. , pure 80% acetic acid. Corrosion rate: 1 mm/year (Inconel). Monel metal + 20 °C, all concentrations. Corrosion rates: in presence of little air, about 2 g/m per day; strong ventilation and stirring, about 5-15 g/m per day (the greatest attack with 80% acid). p. 6 g/m per day; in 26%, 11 g/m per day; in 56%, 14 g/m per day; in 90%, 15 g/m per day. : 2 Concn. 2 Boilers, pipes, fittings.

7 g/m per day (III). — 120 °C, mixtures of 5% acetic acid and 10% sulphuric acid (II). 5-98%. Corrosion rate: 15-60 g/m per day, when air is excluded. e. by stirring and oxygen to 5000 g/m per day in the case of glacial acetic acid. 2 2 Nickel + Corrosion is dependent on the presence of air and other oxidizing agents. Corrosion rates in 1-100% acid: Temp. p. , little air (pure acid): 2 Concn. 4 Boilers for hydrogénation in acetic acid solutions (also by pressure), centrifugal cups, fittings. Corrosion is diminished by the addition of small quantities of mercuric sulphate.

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Corrosion Guide by E. Rabald (Auth.)


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