Abstract: Carbohydrazide is an effective material for preventing hydrogen blistering and corrosion in the refinery overhead condensate systems of Fluid Catalytic Cracking Units.

Abstract: Hydrogen sulfide gas evolution from water or hydrocarbons, especially during storage or transport of petroleum residua is suppressed by the incorporation of an effective amount of a diamine of the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are independently an alky radical containing 1 to 14 carbon atoms, (CH.sub.2).sub.n --OR.sub.6 or cycloalkyl containing 5 or 6 carbon atoms and R.sub.5 is hydrogen or methyl. R.sub.1 and R.sub.2 and R.sub.3 and R.sub.4 can be alkylene groups joined together with their respective adjacent N to form a heterocyclic ring. R.sub.6 is hydrogen or an alkyl radical having 1 to 5 carbon atoms and n is an integer of 1 to 5.

Abstract: A process for reducing the corrosiveness of aerated aqueous solutions, which comprises stripping the oxygen with gas containing hydrogen sulfide after addition of a composition which is both catalytic of the reduction of oxygen by hydrogen sulfide gas and inhibiting of hydrogen sulfide corrosion, such composition comprising certain metallic salts and a water-soluble oxyethylenated amine.

Abstract: Compounds of the formula I ##STR1## wherein R, R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 have the meaning given in claim 1 are formed by thermal rearrangement of the isomers of formula V ##STR2## especially in the presence of basic catalysts. The compounds are corrosion inhibitors for organic materials, in particular coating materials and lubricants. In these substrates they also act as antioxidants and light-stabilizers and are very stable to heat.

Abstract: Compounds of the formula: ##STR1## wherein R.sup.1 and R.sup.2 when taken independently, each represent the monovalent group of formula: ##STR2## wherein Y is a monovalent group selected from hydroxyl and a group of the formula: ##STR3## wherein n is a whole number integer of 0 to 6; X is selected from the group consisting of hydroxyl and amino when n is from 1 to 6; and when n is 0, X is selected from monovalent groups of the formula:--0--alkylene--NR.sup.3 R.sup.4 (IV)wherein n has the meaning previously ascribed to it; R.sup.3 is selected from the group consisting of hydrogen and R.sup.4 ; and R.sup.4 represents a monovalent group of the formula--Alkylene--OH; (V)provided that R.sup.1 and R.sup.2 are not both a carboxyl group; and R.sup.1 and R.sup.2 when taken together represent the divalent moiety of formula: ##STR4## wherein A represents one of oxygen and ##STR5## wherein n has the meaning previously ascribed to it; and applied to oxidation prone metals to inhibit corrosion.

Abstract: A corrosion inhibitor formulation for oil and water systems which formulation is resistance to sludge formation and does not tend to stabilize oil/water emulsions when added to oil and water systems. The corrosion inhibitor include an imidazoline dissolved in an aromatic solvent, a 2-hydroxylakylcarboxylic acid such as glycolic acid and a glycol such as hexylene glycol. The imidazoline is preferably prepared from a long chain fatty acid and a polyamine in a molar ratio of about 1.5:1.

Abstract: A damping liquid for a hydraulic vibration-damping mount is composed of glycol, water and 2 to 20 weight % of age resistor having ozone resistance. The damping liquid gradually diffuses and infiltrates into a rubber member defining a liquid chamber of the hydraulic vibration-damping mount thereby remarkably improving the ozone resistance thereof.

Abstract: Composition for treating cooling water including a combination of ingredients for combatting a variety of problems, such as corrosion, scale control and microbiological growth. Composition obviates the necessity for separately feeding several materials. Compositon includes at least 1% sodium molybdate, at least 0.1% benzotriazole, at least 0.5% citric acid and at least 5% of a microbiocide.

Abstract: The present invention utilizes low volatility amines or alkanol amines to control caustic corrosion which can take place when a boiler system, treated with a coordinated phosphate/pH program, is "out of control".N-substituted hydroxyalkyl piperazines are also capable of mitigating caustic corrosion in coordinated phosphate/pH programs. Combinations of the compounds of the present invention and phosphate have also been shown to be efficacious at mitigating caustic corrosion in coordinated phosphate/pH programs.

Abstract: A method is described for the inhibition of corrosion of carbon steels due to heavy brine corrosive attack, which employs As.sup.+z -containing composition.Corrosion inhibiting compositions comprising As.sup.+z, alone or in admixture with urea as a synergistic inhibitor, are also described.

Abstract: A coolant composition for use in automotive engines is disclosed which comprises a liquid alcohol freezing depressant and a corrosion inhibitor consisting essentially of decanedioic acid, dodecanedioic acid and sodium tolyltriazole.

Abstract: The present invention provides a lubricant composition comprising a lubricating oil and, as a multifunctional additive, at least one compound of formula (I) ##STR1## in which R.sup.1 and R.sup.2 are, independently, hydrogen or C.sub.1 -C.sub.20 alkyl and R.sup.3 is hydrogen, C.sub.1 -C.sub.20 alkyl or a group of the formula ##STR2## wherein R.sup.4 is H or C.sub.1 -C.sub.20 alkyl. Most of the compounds of formula I are new.

Abstract: Specific sulfonamidocarboxylic acids in the form of the alkali metal or alkanolamine salts are used as corrosion inhibitors in aqueous systems.

Abstract: A novel class of polymers and processes used in their preparation are described. The polymers are produced by a reaction between polyfunctional amines and quinones. Some are infusible and intractable. Others are eminently suitable for the production of coatings, adhesives, insulators, etc. Some polymers, in solution in appropriate solvents adhere to metals, siliceous materials, composites with sufficient affinity to displace water. The polymers can be cured by heat or chemicals to an impervious and insoluble material that is not wetted by water.

Abstract: Novel oligomeric quinolinium salts are disclosed. These are formed by reacting quinoline oligomers with alkylating agents such as benzyl halide, p-.alpha.-xylenyl dihalide and alkyl sulfates. The novel oligomeric quinolinium salts are useful as metal corrosion inhibitors, and especially as aqueous acid corrosion inhibitors. The novel compounds are represented by the formulae: ##STR1## wherein n and m are integers, with n being greater than 2 and up to about 200 and m being equal to or greater than 1, R is H or an alkyl group having from 1 to about 20 carbon atoms, R.sup.1 is an alkyl group having 1 to about 20 carbon atoms, X.sup.- is a chloride, bromide or iodide and Z.sup.- is an anion selected from BF.sub.4.sup.-, SO.sub.4.sup.=, ClO.sub.4.sup.-, PF.sub.6.sup.- and HSO.sub.4.sup.-.

Abstract: Water soluble corrosion inhibitors which exhibit low hydrocarbon carryunder are prepared by reaction of alkylenepolyamines and formaldehyde.

Abstract: Use of the compounds of the formula ##STR1## in which R.sub.1 denotes C.sub.12 -C.sub.26 -alkyl or C.sub.12 -C.sub.26 alkenyl, n denotes a number from 0 to 5, K.sup.(+) denotes a group of the formulae ##STR2## or a group of the formula --(C.sub.2 H.sub.4 O).sub.x H, x denotes a number from 1 to 3, A.sup.(- denotes an anion, R.sub.9 denotes a group of the formula R.sub.1 '-(OCH.sub.2 CH.sub.2).sub.n --, C.sub.8 -C.sub.18 -alkylaryl or aryl-C.sub.8 -C.sub.18 -alkyl, R.sub.1 ' denotes C.sub.14 -C.sub.22 -alkyl or C.sub.14 -C.sub.22 -alkenyl, n denotes a number from 0 to 5 and the radicals R.sub.10 are identical and denote C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -hydroxyalkyl, as corrosion protection agents for metallic materials in aqueous media.

Abstract: Acid cleaning/pickling compositions for metal surfaces containing (A) at least one protein-derived polymer, sugar-derived polymer, sorbitol, tannin, or vinyl-based polymer, (B) at least one iodine or iodine-affording compound; acids solutions prepared therefrom; and methods for their use.

Abstract: Included are novel perhydro-s-triazine derivatives, tentacular-perhydro-s-triazines. For example, 1,3,5-triazine-1,3,5-(2H,4H,6H)triethanol dioleate; 1,3,5-triazine-1,3,5-(2H,4H,6H)triethanethiol trioleate; and 1,3,5-triazine-1,3,5-(2H,4H,6H)tris(morpholinoethane) are included. The derivatives are corrosion inhibitors for metals. the compounds may also be used as emulsifiers, lubricants and hydraulic fluids.

Abstract: A method for inhibiting corrosion in aqueous systems comprising adding to the system being treated an effective amount of a composition comprising a molybdate ion source and a water-soluble component selected from polymaleic acid anhydride, amine adducts of polymaleic anhydride, maleic anhydride copolymers, carboxylic acid/sulfonic acid polymers, salts of the above-described polymers, phosphonates, phosphino carboxylic acids, polyphosphoric acid and esters of polyphosphoric acid.

Abstract: There is disclosed a water-base coating composition and method for its use that forms a readily strippable protective film on metal surfaces. The composition includes a film former ingredient which is a terpolymer of polyvinyl butyral, polyvinyl alcohol and polyvinyl acetate. The water-base coating composition also contains a fugitive corrosion inhibitor, i.e., a corrosion inhibitor having a sufficient vapor pressure to impart corrosion resistance to surfaces coated with the film former composition. Suitable corrosion inhibitors are aromatic triazoles such as benzotriazole. A leveling agent such as morpholine is used to prevent the film from pulling from the edges during drying. Morpholine is particularly advantageous as it extends the working time when coating objects, and prevents the dispersion from clogging nozzles of spraying equipment. Morpholine also contributes to the corrosion inhibition of the coating.

Abstract: A corrosion inhibitor for use in liquid hydrocarbon fuels or gasoline oxygenate blends is disclosed. The corrosion inhibitor contains from 35 to 70 wt % of a monoalkenylsuccinic acid wherein the alkenyl group has 8 to 18 carbon atoms, from about 30 to 65 wt % of an aliphatic or cycloaliphatic amine containing 2 to 12 carbon atoms and up to 50 wt % of total solvents consisting of aromatic hydrocarbons and alcohols of 1 to 4 carbons per molecule.The corrosion inhibitor can also be used in inhibited alcohol compositions such as those used in gasoline oxygenate blends.

Abstract: An improved makeready packing for preventing corrosion of cylinders of offset or lithographic printing presses which comprises providing a cylinder surface contacting packing element having a corrosion inhibitor applied thereto in such a manner that the inhibitor will effectively protect the entire surface of the cylinder.

Abstract: Benzoyl alanines of the formula ##STR1## in which R.sup.1 and R.sup.2 can be the same or different and represent hydrogen or an alkyl radical containing from 1 to 12 carbon atoms and R.sup.3 and R.sup.4 can be the same or different and represent hydrogen, an unbranched or branched alkyl radical containing from 1 to 10 carbon atoms, hydroxyalkyl, alkoxyalkyl, carboxyalkyl or alkylaminoalkyl radicals containing from 1 to 3 carbon atoms in the alkyl radicals and wherein R.sup.3 and R.sup.4 together can be the --CH.sub.2 CH.sub.2 --O--CH.sub.2 CH.sub.2 -- group or the --CH.sub.2 CH.sub.2 CH.sub.2 CH.sub.2 CH.sub.2 -- group which form with the nitrogen atom the morpholino or the piperidino ring, respectively; with the proviso that(a) when R.sup.1 is hydrogen or methyl and R.sup.2 and R.sup.3 are hydrogen, R.sup.4 cannot represent hydroxyethyl or carboxymethyl, and(b) when R.sup.1 is hydrogen or methyl and R.sup.2 is hydrogen R.sup.3 and R.sup.4 cannot both represent hydroxyethyl, and(c) when R.sup.1 and R.sup.

Abstract: Corrosion inhibition is obtained by treating a system containing corrosion susceptible metal with a corrosion inhibiting amount, preferably 1 to 10,000 ppm of a thio substituted quaternary ammonium salt, preferably of the general structure: ##STR1## wherein R.sub.1 is preferably H or an alkyl group of 8 to 18 carbon atoms, n is 2 or 3, R.sub.2, R.sub.3 and R.sub.4 are preferably alkyl groups of 1 to 18 carbon atoms and two of R.sub.2, R.sub.3 and R.sub.4 are methyl.

Abstract: The present invention is directed to a composition and method for inhibiting the corrosion of copper and copper alloy metals in aqueous systems. The composition comprises mercaptobenzothiazole and added ferrous ions in a ratio of 1:1 to 1:10, by weight. The method comprises adding this composition to the aqueous system being treated.

Abstract: A corrosion inhibitor for ferrous and non-ferrous aqueous systems comprising (a) a water soluble phosphonic acid or salt thereof, preferably an amino methylene phosphonic acid; (b) a phosphonocarboxylic acid, preferably a phosphonoalkane carboxylic acid; and (c) a triazole, preferably benzotriazole or tolyltriazole.

Abstract: Corrosion inhibitor compositions comprising a mixture of (1) a volatile amine selected from the group consisting of cyclohexylamine, isopropylamine and morpholine and (2) a tertiary C.sub.12-14 alkylammonium carboxylate selected from the group consisting of a C.sub.12-14 alkylammonium benzoate and a tertiary C.sub.12-14 alkylammonium-N-oleoyl sarcosinate. Such compositions are useful in inhibiting corrosion on the interior surfaces of tin-plated aerosol cans containing water-based aerosol formulations.

Abstract: Corrosion inhibitor compositions comprising a mixture of a nitroalkane containing 1-3 carbon atoms and a tertiary C.sub.12-14 alkylammonium carboxylate selected from the group consisting of a C.sub.12-14 alkylammonium benzoate and a tertiary C.sub.12-14 alkylammonium-N-oleoyl sarcosinate. Such compositions are useful in inhibiting corrosion on the interior surfaces of tin-plated aerosol cans containing water-based aerosol formulations.

Abstract: Corrosion inhibitor compositions comprising a mixture of a nitroalkane containing 1-3 carbon atoms and a cocoamide of diethanolamine. Such compositions are useful in inhibiting corrosion on the interior surfaces of tin-plated aerosol cans containing water-based aerosol formulations.

Abstract: Corrosion inhibitor compositions comprising a mixture of nitroalkane containing 1-3 carbon atoms and an amine neutralized phosphate ester selected from the group consisting of 2-ethylhexylamine salt of mixed mono- and di-isooctyl acid phosphate, tertiary C.sub.12 alkyl primary amine salt of mixed mono- and di-isooctyl acid phosphate, diethylamine salt of mixed mono- and di-butoxyethyl acid phosphate and 2-ethylhexylamine salt of mixed mono- and di-tridecyl acid phosphate. Such compositions are useful in inhibiting corrosion on the interior surfaces of tin-plated aerosol cans containing water-based aerosol formulations.

Abstract: An improved sheet material for corrosion inhibition of the surfaces of packaged ferrous metal products which comprises a sheet material substrate having a vapor phase corrosion inhibitor composition applied as a printed pattern of uniformly distributed spaced - areas of predetermined size occupying about 25% of the total area of the treated sheet and consisting of a total dried weight of about 0.226 to 0.302 grams of the inhibitor composition per square foot of the treated sheet.

Abstract: A corrosion-inhibiting composition of matter comprising (1) the reaction mass resulting from the reaction of an .alpha.,.beta.-unsaturated hydrocarbyl nitrile and a metal hydrocarbyl sulfonate, (2) an alcohol, (3) a hydrocarbon diluent, and optionally (4) an epoxy resin. The composition is particularly useful in the treatment of downhole metal surfaces in oil and gas wells for inhibiting the corrosion of the metal.

Abstract: A combination corrosion and scale inhibitor composition comprising the reaction product of a heterocyclic nitrogen containing compound (e.g., mixtures of alkyl substituted pyridines) and aldehyde (e.g., formaldehyde) and a phosphoric acid constituent (e.g., phosphoric acid or phosphonic acid). Such compositions exhibit, simultaneously, inhibition to oxidation corrosion (rusting of carbon steel); suppression of sulfide corrosion (H.sub.2 S in NaCl brine) and the prevention of mineral scaling (CaCO.sub.3 and CaSO.sub.4 scale precipitation).

Abstract: The invention relates to novel compounds which are particularly suitable as corrosion inhibitors for aqueous liquids for the cleaning of metals, and especially as corrosion inhibitors for oil-free aqueous liquids used for the working of metals, in particular those exposed to corrosion. The compounds according to the invention correspond to the formula ##STR1## The invention also relates to a process for their preparation.

Abstract: A composition which is noncorroding to metals in contact therewith includes water, an alkylene glycol and/or a polyoxyalkylene glycol, a polyoxyalkylene amine and substantially no inorganic nitrite. The polyoxyalkylene amine replaces the previously used inorganic nitrite to reduce the toxicity of the noncorroding composition.

Abstract: An improved, highly penetrating rust remover and/or degreaser composition for metallic surfaces is provided which is chemically inhibited to substantially prevent oxidation-reduction reactions with a metal substrate and limit the action of the composition to a chemical attack on corrosion. The composition is preferably a single phase dispersion and includes respective quantities of an acid such as hydrochloric acid and phosphoric acid, an organic compound containing a nitrogen, oxygen or sulfur atom such as N-(2-hydroxyethyl) oxazolidine, an alcohol or other organic solvent for grease removal, water and one or more emulsifiers (e.g., a derivative of hydrogenated tallow) for stabilizing and lowering the surface tension of the resultant composition.

Abstract: Corrosion inhibition of metals is obtained treating a system with a corrosion-inhibiting amount, preferably 1 to 10000 ppm, of an optionally-substituted .beta.-pyridyl-ethylamine or a salt thereof, which may be prepared by reacting an amine with a vinylpyridine, preferably in the presence of an acidic catalyst such as acetic acid. The .beta.-pyridyl-ethylamine is a compound of the general formula: ##STR1## wherein R is an alkyl, aryl, aralkyl, alkaryl, halo or amino group of a group --COX where X is hydrogen, alkyl, aryl, hydroxy, alkoxy, aryloxy, amino or halo group, n is zero or an integer from 1 to 4, and R.sup.1 and R.sup.2, which may be the same or different, each represent a hydrogen atom, an optionally substituted hydrocarbyl radical, an alkylamino radical, a heterocyclic radical or a group ##STR2## or R.sup.1 and R.sup.2 with the intervening nitrogen atom together represent a saturated or unsaturated heterocyclic ring optionally containing one or more additional heteroatoms.

Abstract: A corrosion inhibitor for ferrous metals comprising four different components of (a) an inorganic acid component (such as molybdate or tungstate), (b) an aliphatic hydroxycarboxylic or aliphatic dicarboxylic acid or its salt (such as citric acid, gluconic acid or succinic acid), (c) an inorganic heavy metal compound (such as zinc chloride or stannous chloride) and (d) a water soluble polymer component having a molecular weight of 500-100,000 (such as acylic homo or copolymer), which is especially advantageous for use in water recycling system.

Abstract: Synthesized- and mineral-based industrial lubricants are stabilized with a triazole adduct of amine phosphates thereby providing excellent oxidation stability, antiwear and rust preventative performance for said industrial lubricants.

Abstract: Corrosion of metallic surfaces by aqueous alkanolamine solutions employed in acid gas removal is inhibited by combinations of particular vanadium compounds and an organic compound selected from the group consisting of nitro-substituted aromatic acids, nitro-substituted acid salts, and 1,4-naphthoquinone, preferably from the group consisting of p-nitrobenzoic acid, m-nitrobenzoic acid, 3,5-dinitrobenzoic acid, p-nitrophenol, m-nitrophenol, m-nitrobenzenesulfonic acid, 1,4-naphthoquinone, and mixtures thereof.

Abstract: An oxygen-scavenging and corrosion-inhibiting agent for fluidic systems comprising an aminoguanidine compound selected from the formula: ##STR1## or a salt thereof, wherein R is selected from H or a lower alkyl group having 1 to 4 carbon atoms; wherein X is selected from NH or NNH.sub.2 ; and Y is selected from --NH.sub.2 or --NHNH.sub.2.

Abstract: Poly sulfoxides of the general formula ##STR1## where each R is a monovalent aliphatic radical bound to a sulfoxy group. Each R is defined as being individually selected from the group consisting of ##STR2## wherein R', R" and R"' are individually selected from the group consisting of alkyl moieties containing 1 to 22 carbon atoms, and aralkyl moieties, alkylated aryl moieties, heterocyclic alkyl moieties, cycloalkyl moieties containing 4 to 40 carbon atoms wherein the said moieties are joined to the sulfoxy group through the alkyl chain, the said moieties being unsubstituted and substituted, said substitutions being individually selected from the group consisting of halogen moieties, nitro moieties, alkoxy moieties, alkyl moieties, and dialkylamino moieties.

Abstract: Corrosion inhibitors for aqueous media comprise a triazole, an alkali metal borate, benzoate, and silicate and an alkali metal salt of a C.sub.7 to C.sub.13 dibasic acid. They may be used in antifreeze compositions for motor vehicles. Since neither nitrites and amines are required the danger of forming toxic nitrosamines by the reaction of these materials is overcome.

Abstract: A novel fuel composition contains ethanol or gasohol plus, as a corrosion inhibitor, a reaction product of benzotriazole, formaldehyde, and an N-alkyl propylene diamine.

Abstract: A method is provided for preventing haze formation in a carburetor detergent and corrosion inhibiting fuel additive which is prepared by reacting a mole of maleic anhydride with from about 2 to 4 moles of a mixture of N-alkyl propane diamines of a specific alkyl chain distribution in the presence of from about 0.5 to 5 weight percent based on the N-alkyl propane diamine mixture of a phenolic antioxidant.

Abstract: A highly stable metal oxide oil slurry useful in reducing slag, facilitating removal of deposits from boiler tubes, and reducing corrosion on the heating surfaces of boilers has been developed. Such a slurry consists essentially of about 50% by weight magnesium oxide or the entity of magnesium oxide and alumina oxide, together with an oil-soluble emulsifier such as alkanolamide and preferably ethanolamide, or an alkanol with a carbon chain greater than a C.sub.3 alcohol, an oil-soluble dispersant such as a C.sub.12 -C.sub.22 entity selected from an unsaturated or saturated fatty acid; e.g., oleic acid. Also, as a constituent is an anionic surfactant such as magnesium lauryl sulfate in an oil base such as No. 2 fuel oil. The alkanolamide is fashioned from heating alkanolamines and fatty acids either in a 1:1 ratio or 2:1 ratio. The reactant amino alcohol is in the range C.sub.10 -C.sub.24. The alcohol itself is greater than C.sub.3 and up to C.sub.16, with a preferred range C.sub.12 -C.sub.16.

Abstract: Novel amide acetals of the formula ##STR1## wherein R.sub.1 is hydrogen, methyl or Y and Y is the remnant of a hydroxyl-containing compound are claimed. The compounds are useful as water scavengers in fluid compositions.

Abstract: A stabilized methylchloroform for use in vapor degreasing which is stable in the presence of metals which contains pyrazine, dimethoxypropane, an acetylenic alcohol and a nitroalkane or a methylfuran. Such combination prevents corrosion of aluminum, iron, copper and zinc and the decomposition of the solvent.

Abstract: Anticorrosive agent stable to hard water, which comprises an alkali metal salt, alkaline earth metal salt, or amine salt of a compound of the formula ##STR1## in which R.sub.1 is branched C.sub.6 -C.sub.13 -alkyl or C.sub.5 - or C.sub.6 -cycloalkyl, or polycycloalkyl having from 6 to 13 carbon atoms optionally substituted by 1 or 2 C.sub.1 -C.sub.4 -alkyl groups,R.sub.2 is hydrogen or C.sub.1 -C.sub.6 -alkyl, andR.sub.3 is C.sub.1 -C.sub.11 -alkylene in linear or branched chain.