Corrosion inhibitors for cement compositions

Details Corrosion inhibitors for cement compositions Corrosion inhibitors for cement compositions

C - Chemistry, Metallurgy

23

F

C23F 11/14 (2006.01) C04B 24/12 (2006.01) C04B 40/00 (2006.01)

Patent

CA 2209758

Compositions and methods relating to cementitious compositions are provided. The addition of an amidoamine that is the reaction product of polyalkylenepolyamines and short-chain alkanedioic acids or reactive derivatives thereof to cementitious compositions has been found useful in inhibiting the corrosion of ferrous metal articles in contact with said composition. The amidoamine is advantageously employed in combination with a hydrophobe compound that enhances corrosion inhibition. The invention also provides aqueous emulsions which contain the amidoamine, one or more hydrophobes, and an emulsifier for the hydrophobe.

Compositions et méthodes concernant des mélanges cimentaires. L'addition d'une amidoamine, produit de réaction de polyalkylènepolyamines et d'acides alcanedioïques ou de dérivés réactifs à des compositions cimentaires s'est révélée utile pour empêcher la corrosion d'articles en métaux ferreux en contact avec cette composition. L'amidoamine est employée avantageusement en combinaison avec un composé hydrophobe qui améliore l'action anti-corrosion. L'invention présente également des émulsions aqueuses renfermAnt l'amidoamine, un ou plusieurs hydrophobes, et un émulsifiant pour l'hydrophobe.

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