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  Compositions and methods for preventing and treating corrosion of metal surfacesUSPTO Application #: 20070105736Title: Compositions and methods for preventing and treating corrosion of metal surfaces Abstract: Environmentally safe, cost effective, VOC-free compositions and methods for the prevention and treatment of corrosive processes in and on metal such as rust, flash rust and scale in a wide variety of industry sectors is provided. Compositions particularly well suited for preventing and treating flash rust may include an organic acid or salt thereof, a natural gum and/or wax and/or wax extract, and water. Such compositions do not substantially affect the adhesive quality of coatings subsequently applied to the metal surface and provide excellent solvent and spray resistance. (end of abstract)
Agent: Kramer Levin Naftalis & Frankel LLP Intellectual Property Department - New York, NY, US Inventors: LeeAnn Applewhite, Mairym Samra, John Komar USPTO Applicaton #: 20070105736 - Class: 510201000 (USPTO) Related Patent Categories: Cleaning Compositions For Solid Surfaces, Auxiliary Compositions Therefor, Or Processes Of Preparing The Compositions, Cleaning Compositions Or Processes Of Preparing (e.g., Sodium Bisulfate Component, Etc.), For Cleaning A Specific Substrate Or Removing A Specific Contaminant (e.g., For Smoker`s Pipe, Etc.), For Removing Integral Organic Coating, Sealant, Or Finish From A Substrate (e.g., Stripping Paint, Varnish, Etc.) The Patent Description & Claims data below is from USPTO Patent Application 20070105736. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS REFERENCE APPLICATION [0001] This application is a continuation-in-part of U.S. application Ser. No. 10/812,820, filed Mar. 30, 2004, which in turn claims priority to provisional U.S. Application Ser. No. 60/472,960, filed May 23, 2003. The contents of each of these applications are incorporated herein by reference in their entireties. FIELD OF THE INVENTION [0002] The present invention concerns compositions and methods for treating or preventing corrosive processes on metal surfaces. BACKGROUND OF THE INVENTION [0003] A recent government study concluded that the total annual cost due to corrosion in the U.S. alone is around $276 billion, representing nearly 3.1% of the U.S. Gross Domestic Product in 1998. Corrosion affects many different industry sectors, including infrastructure, utilities, transportation, production and manufacturing, and government. The infrastructure sector includes highway bridges, gas and liquid transmission pipelines, waterways and ports, hazardous materials storage, airports and railroads. The utility sector includes gas distribution, drinking water and sewer systems, electrical utilities and telecommunications. The transportation sector includes motor vehicles, ships, aircraft, railroad cars and hazardous materials transport. The production and manufacturing sector includes oil and gas exploration and production, mining, petroleum refining, chemical, petrochemical, pharmaceutical, pulp and paper, agriculture, food processing, electronics and home appliances. The government sector includes defense and nuclear waste storage. Corrosion is thus a serious and widespread problem for a variety of industries. [0004] There have been numerous attempts to address corrosive processes, none of which have been especially satisfactory. For example, chromate, nitrate, and amine-based compositions typically degrade the performance of coatings and, therefore, should be removed prior to application of a coating layer. Water-based flash rust products are typically toxic and thus potentially hazardous to the environment. Handling and disposal of toxic materials can be difficult and expensive. In addition, the high pH of many of many water-based compositions can burn exposed skin and thus require extensive PPE (personal protection equipment) investment and usage. Moreover, if not completely removed prior to coating, residual film of water-based products can disrupt the performance of coatings. Furthermore, water soluble solutions are greatly affected by water quality variations such as pH and water hardness. [0005] Preventative measures are likewise unavailing since they are typically only marginally effective and/or cumbersome. Dehumidification processes, for example, require large spaces, expensive equipment, extensive monitoring and forced ventilation systems. Blasting, cleaning and coating processes are also expensive and provide inconsistent results. [0006] Accordingly, a significant need exists for environmentally safe, cost-effective compositions and methods for the prevention and treatment of corrosive processes in a variety of industry sectors, including infrastructure, utilities, transportation, production and manufacturing, and the government. SUMMARY OF THE INVENTION [0007] Applicants have surprisingly discovered environmentally safe, cost effective compositions and methods for the prevention and treatment of corrosive processes in a wide variety of industry sectors. Such compositions are environmentally friendly in that they generally do not contain volatile organic compounds and as such are considered "VOC-free". Industry sectors for which these compounds and methods are useful include infrastructure, utilities, transportation, production and manufacturing, and the government. Corrosive processes include, for example, rust, flash rust, and scale formation. [0008] One embodiment of the present invention provides aqueous non-toxic, anti-corrosive, rust-inhibiting compositions which may include organic acids such as sorbic acid, salts of sorbic acid and/or derivatives thereof such as potassium sorbate and extracts natural gums or waxes such as beeswax, vegetable wax and/or extracts or derivatives thereof. [0009] Another embodiment of the present invention provides compositions which are particularly well-suited to prevent flash rust on metal surfaces, wherein such compositions may include organic acids such as sorbic acid, salts of sorbic acid and/or derivatives thereof such as potassium sorbate and natural gums or waxes such as beeswax, vegetable wax and/or extracts or derivatives thereof. [0010] Yet another embodiment of the present invention provides compositions which are particularly well-suited for use as a bath or dip to prevent rusting of metal surfaces, wherein such compositions may include organic acids such as sorbic acid, salts of sorbic acid and/or derivatives thereof such as potassium sorbate and natural gums or waxes such as beeswax, vegetable wax and/or extracts or derivatives thereof. [0011] Another embodiment of the present invention provides compositions which are particularly well-suited to operate as paint or coating preservatives which are effective in preventing rust formation on coated surfaces. Such compositions may include organic acids such as sorbic acid, salts of sorbic acid and/or derivatives thereof such as potassium sorbate and extracts natural gums or waxes such as beeswax, vegetable wax and/or extracts or derivatives thereof. [0012] Still other embodiments of the present invention provide methods of making and using compositions useful as flash rust inhibitors, as bath or dips and as paint preservatives or additives. BRIEF DESCRIPTION OF THE DRAWINGS [0013] FIG. 1 provides ASTM D4541 PATTI adhesion testing results comparing an embodiment of the present invention to an iron phosphate-based composition to a bare metal control (upon which no rust inhibitor had been applied) after application of a conventional zinc rich/haze gray coating on each. [0014] FIG. 2 provides ASTM D4541 PATTI adhesion testing results after immersion comparing an embodiment of the present invention to a bare metal control (upon which no rust inhibitor had been applied) after application of a conventional coating on each. [0015] FIG. 3 provides ASTM D3359 adhesion testing results comparing an embodiment of the present invention to a bare metal control (upon which no rust inhibitor had been applied) after application of a conventional zinc rich/haze gray coating on each. [0016] FIG. 4 provides ASTM D4752 solvent resistance results comparing an embodiment of the present invention to a bare metal control (upon which no rust inhibitor had been applied) after application of a conventional zinc rich/haze gray coating on each. [0017] FIG. 5 provides ASTM B117 salt spray resistance results (average rating) comparing an embodiment of the present invention to a bare metal control (upon which no rust inhibitor had been applied) after application of a conventional zinc rich/haze gray coating on each. [0018] FIG. 6 provides ASTM B117 salt spray resistance results (hours to blister) comparing an embodiment of the present invention to a bare metal control (upon which no rust inhibitor had been applied) after application of a conventional coating on each. DETAILED DESCRIPTION Continue reading... Full patent description for Compositions and methods for preventing and treating corrosion of metal surfaces Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Compositions and methods for preventing and treating corrosion of metal surfaces patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. 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