Method of inhibiting corrosion on ferrous metal surfaces in...

Details Method of inhibiting corrosion on ferrous metal surfaces in... Method of inhibiting corrosion on ferrous metal surfaces in...

C - Chemistry, Metallurgy

05

G

C05G 3/00 (2006.01) C05C 1/00 (2006.01) C23F 11/00 (2006.01)

Patent

CA 2636859

A method of using trace amounts of certain compounds to reduce or inhibit corrosion on metal surfaces exposed to corrosive materials is disclosed. The compounds include hydroxlamines, acrylate polymers or copolymers, certain organic acids, tannic acid, carbohydrazide and its derivates and salts, and combinations of these compounds. The metal surfaces may include any ferrous metal piping or equipment surfaces, such as that used during storage, transport, and other processing of such materials. A corrosion- inhibited UAN solution having about 20 to about 50 percent by weight water and from less than 10 to about 1,000 ppm of one or more of the described corrosion inhibitors, and a pH from about 7 to about 8 is also disclosed.

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