Corrosion-inhibiting compositions and functional fluids...

C - Chemistry – Metallurgy – 10 – M

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253/133, 31/49

C10M 173/00 (2006.01) C10M 141/06 (2006.01) C10M 173/02 (2006.01) C23F 11/12 (2006.01) C23F 11/14 (2006.01)

Patent

CA 2022502

L-2460B Title: CORROSION-INHIBITING COMPOSITIONS AND FUNCTION- AL FLUIDS CONTAINING SAME Abstract of the Disclosure The invention provides a composition comprising: (A) at least one dicarboxylic acid or anhy- dride or at least one ammonium or metal salt of the dicarboxylic acid or anydride; and (B) at least one compound represented by the formula Image wherein R2, R3, R4 and R5 are each independently hydrogen, alkyl, hydroxyalkyl, polyhydroxyalkyl, polyal- koxyalkyl or hydroxypolyalkoxyalkyl; and R1 is a hydro- carbyl group. In another embodiment, the compositions include (C) at least one acid, or ammonium or metal salt of the acid represented by the formula: Image (II) wherein R6, R7, R8 and R9 are each independently hydrogen or hydrocarbyl groups; and n is a number from 1 to about 10; (D) at least one ester-salt derived from at least alkyl or alkenyl succinic acid or anhydride of about 8 to about 28 carbon atoms and at least one alkanol amine; or mixtures of (C) and (D). The invention further provides for concentrates and functional fluids containing the above corrosion-in- hibitors.

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