Corrosion inhibition in highly acidic environments

Details Corrosion inhibition in highly acidic environments Corrosion inhibition in highly acidic environments

C - Chemistry, Metallurgy

23

F

C23F 11/04 (2006.01) C10G 7/10 (2006.01)

Patent

CA 2067313

A method for inhibiting corrosion of ferrous surfaces in an acidic, aqueous medium having a temperature of at least about 200°F is disclosed. The method comprises incorporating into the medium a corrosion inhibiting amount of a corrosion inhibitor comprising the reaction product of an aldehyde and a composition corresponding to the formula: (see fig. I) wherein R1 is a hydrocarbon group, R2 and R3 are independently selected from H and alkyl, R4 is H, alkyl, alkanol or (alkylene-N)nH wherein n is at least one, and x is 2 or 3. The present invention is also directed to a such method in which the corrosion inhibitor comprises a compound corresponding to the formula: (see fig.II) wherein R1, R2 and R3 and x are defined as above.

Pierre de curling constituée de deux couches de matériaux, une couche principale supérieure et une couche de base constituant la semelle. Les deux couches sont mises en contact le long d'une surface de liaison plate qui est simplement formée à l'interface de la couche principale à l'aide d'une scie à pierres. La pierre peut-être fabriquée à partir d'une pierre déjà existante dont la semelle a été endommagée ou à partir d'une pierre originale. Une pierre étanche peut être utilisée pour réaliser la semelle tandis qu'une pierre moins chère, mais plus résistante au choc, peut être utilisée pour constituer le corps principal et la bande d'impact.

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