Methods and compositions for passivating heat exchanger systems

Details Methods and compositions for passivating heat exchanger systems Methods and compositions for passivating heat exchanger systems

C - Chemistry, Metallurgy

23

C

C23C 22/66 (2006.01) C09K 5/20 (2006.01) C23C 22/68 (2006.01) C23F 11/18 (2006.01) F28F 19/02 (2006.01)

Patent

CA 2695183

A method for treating parts in a heat exchanger system is provided. In the method, heat exchanger parts with metal surfaces which chemically and detrimentally interact with additives in coolant fluids in the heat exchanger system are treated by con-tacting the metal surfaces with a phosphate-containing solution for the phosphate-containing solution to passivate the metal surface for subsequent contact with the coolant fluids.

L'invention concerne un procédé destiné à traiter des pièces dans un système d'échangeur thermique. Dans le procédé, on traite des pièces d'échangeur thermique présentant des surfaces métalliques qui interagissent chimiquement et de manière nocive avec des additifs dans des fluides frigorigènes situés dans le système d'échangeur thermique en mettant les surfaces métalliques en contact avec une solution contenant du phosphate pour que la solution contenant du phosphate passive la surface métallique, pour un contact consécutif avec les fluides frigorigènes.

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