Corrosion inhibitor formulations with improved performance,...

C - Chemistry – Metallurgy – 23 – F

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C23F 11/04 (2006.01) C11D 17/00 (2006.01)

Patent

CA 2609316

Aqueous corrosion inhibitor compositions, preferably storage-stable, useful in acidic cleaning solutions for cleaning the surfaces of metal, comprising reaction products of at least one rosin amine component, at least one non- flammable liquid ketone component, at least one carboxylic acid component, at least one paraformaldehyde component and water; aqueous acidic cleaners prepared therefrom; and methods of their use. The inventive corrosion inhibitor compositions are made by a simple process which reduces the presence of toxic and/or flammable raw materials, co-products, residual reactants and chloride ion while providing acid inhibition in aqueous acidic cleaners.

Compositions aqueuses d'inhibiteur de corrosion, de préférence stables au stockage, utiles dans des solutions de nettoyage acides servant à nettoyer les surfaces de métal, comprenant les produits de réaction d'au moins un composant amine de colophane, au moins un composant cétone liquide non inflammable, au moins un composant acide carboxylique, au moins un composant paraformaldéhyde et de l'eau ; nettoyants aqueux acides préparés à partir de celles-ci ; et procédés d'utilisation de celles-ci. Les compositions d'inhibiteur de corrosion de l'invention sont fabriquées par un procédé simple qui réduit la présence de matières premières toxiques et/ou inflammables, de sous-produits, de réactifs résiduels et d'ion chlorure tout en permettant une inhibition de l'acide dans des nettoyants aqueux acides.

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