C - Chemistry – Metallurgy – 23 – F
Patent
C - Chemistry, Metallurgy
23
F
C23F 11/18 (2006.01) C09K 5/00 (2006.01) C09K 5/20 (2006.01) C23F 11/08 (2006.01) C23F 11/14 (2006.01)
Patent
CA 2246443
The invention described herein is a corrosion inhibitor concentrate, and a method for preparation thereof, which may be formulated free of nitrites, nitrates, amines, and phosphates. The inhibitor concentrate is a "single part" synergistic combination of inhibitors, stabilizers, and antifoam agents, useful for reinhibition of recycled antifreeze/coolant. The inhibitor concentrate is efficacious for corrosion inhibition in coolants across a broad range of glycol quality. The inhibitor concentrate comprises specific amounts of water, triazole, alkali metal hydroxide, borate, alkali metal silicate, silicate stabilizer, and anti-foaming agent.
L'invention concerne un concentré d'inhibiteur de corrosion et un procédé pour le préparer, ce concentré pouvant être formulé sans nitrites, nitrates, amines et phosphates. Le concentré d'inhibiteur est une combinaison synergétique unitaire qui contient des inhibiteurs, des stabilisants et des agents anti-mousse, et qui est utile pour l'inhibition d'antigel/agent de refroidissement recyclé. Le concentré d'inhibiteur est efficace comme inhibiteur de corrosion pour toute une gamme de fluides de refroidissement de type glycols. Le concentré d'inhibiteur contient des quantités spécifiques d'eau, de triazole, d'hydroxyde de métal alcalin, de borate, de silicate de métal alcalin, de stabilisant silicate et d'agent anti-mousse.
Connor Kevin C.
Hillier Eric H.
Fetherstonhaugh & Co.
Recochem Inc.
The Dow Chemical Company
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