Inhibiting ferrous metal corrosion by aqueous ammoniate...

Details Inhibiting ferrous metal corrosion by aqueous ammoniate... Inhibiting ferrous metal corrosion by aqueous ammoniate...

C - Chemistry, Metallurgy

23

F

C23F 11/06 (2006.01) C07F 9/26 (2006.01)

Patent

CA 2278339

Aqueous solutions of ammonium chloride and ammonia that contain a water- soluble impurity normally tending to engender corrosion of ferrous metal are rendered corrosion-resistant by dissolving therein a small corrosion-inhibiting amount (e.g., up to about 5000 ppm wt/wt) of a water-soluble salt or oxide of zinc, aluminum, arsenic, antimony or bismuth.

L'invention porte sur des solutions aqueuses de chlorure d'ammonium et d'ammoniac contenant des impuretés hydrosolubles qui tendent normalement à provoquer la corrosion des métaux ferreux, mais qui sont rendues non corrosives lorsqu'on y dissout une faible quantité (par exemple jusqu'à environ 5000 ppm (poids/poids) d'un sel hydrosoluble ou d'un oxyde, de zinc, d'aluminum, d'arsenic, d'antimoine ou de bismuth.

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