Method and composition for inhibiting corrosion in aqueous...

Details Method and composition for inhibiting corrosion in aqueous... Method and composition for inhibiting corrosion in aqueous...

C - Chemistry, Metallurgy

23

F

C23F 11/10 (2006.01) C23F 11/08 (2006.01) C23F 11/14 (2006.01)

Patent

CA 2369954

A method for controlling corrosion of metals, such as stainless steel, in contact with an aqueous system which comprises introducing into said system at least one tetrazolium compound of formula (I) wherein R1, R2 and R3 are selected from the group consisting of lower alkyl, branched lower alkyl, aryl, substituted aryl, alkylaryl, substituted alkylaryl and heterocyclic substituted aryl, with the proviso that neither R1, R2, or R3 contain more than 14 carbon atoms; and n is 1 or 2, such tetrazolium compound optionally having associated water soluble ionic species if needed to obtain a neutral charge.

L'invention concerne un procédé pour contrôler la corrosion de métaux tels que l'acier inoxydable en contact avec un système aqueux, qui consiste à introduire dans ledit système au moins un composé de tétrazolium correspondant à la formule (I) dans laquelle R1, R2 et R3 sont sélectionnés dans le groupe constitué d'alkyle inférieur, d'alkyle inférieur ramifié, d'aryle, d'aryle substitué, d'alkylaryle, d'alkylaryle substitué et d'aryle substitué hétérocyclique, à condition qu'aucun des R1, R2 et R3 ne contient plus de 14 atomes de carbone et que n est 1 ou 2, ces composés de tétrazolium possédant éventuellement des espèces ioniques hydrosolubles dans le cas où l'on voudrait obtenir une charge neutre.

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