Method of inhibiting corrosion of flux-treated metal surfaces

Compositions: coating or plastic – Coating or plastic compositions – Corrosion inhibiting coating composition

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106 1413, 106 1441, 106 1442, 106 1444, 252 74, 252 76, 252 79, C23F 1100

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active

059251735

ABSTRACT:
This invention relates to a method of inhibiting the corrosion of flux-treated metal surfaces. The method comprises the step of contacting the flux-treated metal surface with a formulation comprising a corrosion inhibitor composition comprising one or more mono-carboxylic acids, or salts or isomers thereof, and an effective amount of a corrosion inhibiting surface active agent such as a water soluble alkali or alkaline earth metal nitrate salt. This method has been demonstrated to be a surprisingly effective means to inhibit corrosion of flux-treated metal surfaces found in the cooling systems of internal combustion engines.

REFERENCES:
patent: 3951328 (1976-04-01), Wallace et al.
patent: 3971501 (1976-07-01), Cooke
patent: 4246030 (1981-01-01), Lipinski
patent: 4382008 (1983-05-01), Boreland et al.
patent: 4448702 (1984-05-01), Kaes
patent: 4588513 (1986-05-01), Triebel et al.
patent: 4647392 (1987-03-01), Darden et al.
patent: 4657689 (1987-04-01), Darden
patent: 4759864 (1988-07-01), Van Neste et al.
patent: 4946616 (1990-08-01), Falla et al.
patent: 5269956 (1993-12-01), Miller et al.
patent: 5333776 (1994-08-01), Garg et al.
patent: 5360158 (1994-11-01), Conn et al.
patent: 5387360 (1995-02-01), Uekusa et al.
patent: 5413642 (1995-05-01), Alger
patent: 5422191 (1995-06-01), Childree
patent: 5507861 (1996-04-01), Caupin et al.
patent: 5718836 (1998-02-01), Nakatani et al.
patent: 5741436 (1998-04-01), Gershun et al.
The Aluminum Association, "Base Metals, Brazing Filler Metals and Fluxes," Aluminum Brazing Handbook, ch. 3, pp. 24-32 (Jan. 1990).
Ando et al., "Development of Aluminum Radiators Using the Nocolok Brazing Process--Corrosion Resistance of New Aluminum Radiators by Applying a Nocolok Brazing Process," SAE Technical Paper No. 870180 (Feb. 1987).
American Welding Society, Brazing Handbook, ch. 4, pp. 69-97 (4th ed. 1991) no month.
D.L. Childree, "A New Al-Si-Li Filler Metal that Enhances Brazeability of High-Strength Alloys in CAB and Vacuum," SAE Int'l SP-1175, Technical Paper No. 960247, pp. 17-25 (1996) no month.
Chrysler Corporation Engineering Standards, "Engine Coolant--Glycol Type-Inhibited-Production and Service Use Part No. 4698542," Standard No. MS-9769 (Jun. 1995).
Chycu et al., "The Effect of Nitrogen on the Corrosion of Plasma-Nitrided 4140 Steel," Corrosion, 47(1), pp. 31-34 (1991) no month.
Claydon et al., "Brazing Aluminum Automotive Heat Exchanger Assemblies Using a Non-Corrosive Flux Process," SAE Technical Paper No. 830021 (Feb. 1983).
Cooke et al., "Furnace Brazing of Aluminum with a Non-Corrosive Flux," SAE Technical Paper No. 780300 2(1978).
Darden et al., "Monobasic/Diacid Combination as Corrosion Inhibitors in Antifreeze Formulations," Worldwide Trends in Engine Coolants, Cooling System Materials and Testing, SAE Int'l SP-811, Paper #900804, pp. 135-151 (1990).
Field et al., "Mechanistic Aspects of the Nocolok Flux Brazing Process," SAE Technical Paper No. 870186 (Feb. 1987).
Ford Engineering Material Specifications, "Coolant, Organic Additive Technology, Concentrate," Specification No. WSS-M97B44-C (1995) no month.
Ford Motor Company, Ford Laboratory Test Method (FLTM) BL 5-1 (Feb. 1981).
Fortin et al., "Aluminum Materials and Processes for Aluminum Heat Exchanger Applications," SAE Technical Paper No. 852228, pp. 425-436 (1985) no month.
General Motors Engineering Standards, "Long-Life Automotive Engine Coolant Antifreeze Concentrate-Ethylene Glycol," Specification No. GM6277M (1995) no month.
Hagiwara et al., "Development of Corrosion Resistant Aluminum Heat Exchanger, Part 1: Development of New Aluminum Alloy Sheets for Sacrificial Anode," SAE Technical Paper No. 860080 (Feb. 1986).
Stanley T. Hirozawa, "Galvanostaircase Polarization: A Powerful Technique for the Investigation of Localized Corrosion," Abstract No. 48, presented at the Electrochemical Society Meeting, pp. 81-82 (1982) no month.
Johnny Liu, "Nocolok Flux and Aluminum Brazing," SAE Int'l SP-1175, Technical Paper No. 960244 (1996) no month.
Liu et al., "Nocolok Brazing Aluminum Heat Exchangers," SAE Technical Paper No. 950117, pp. 95-99 (Feb. 1995).
Park et al., "New Vacuum Brazed Aluminum Radiators for Ford Light Trucks," SAE Technical Paper No. 860078 (Feb. 1986).
Sridhar et al., "Applicability of Repassivation Potential for Long Term Prediction of Localized Corrosion of Alloy 825 and Type 316L Stainless Steel," Corrosion, 49(11), pp. 885-894 (1993) no month.
Truhan et al., "Effect Of Nitrate Concentration on Passivation of Aluminum Alloys in Commercial Coolants for Heavy Duty Diesel Engines," SAE Technical Paper 900436 (Feb. 1990).
"Vital Signs," Ward's Auto World, p. 22 (Sep. 1996).
Wiggle et al., "The Effectiveness of Engine Coolant Inhibitors for Aluminum," Corrosion 80, National Association of Corrosion Engineering Conference, Technical Paper 69 (Mar. 1980).
Wiggle et al., "A Rapid Method to Predict the Effectiveness of Inhibited Engine Coolants in Aluminum Heat Exchangers," SAE Technical Paper 800800 (Jun. 1980).
Winter et al., "The Story Behind the Numbers," Ward's 1996 Automotive Yearbook, pp. 24-30 (58th ed. 1996) no month.

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