Abstract: An environmentally friendly corrosion inhibiting formulation for the oil-water interface of pipe lines and oil well drilling systems which is prepared pursuant to a process including the steps of reacting a fatty acid anhydride selected from the group consisting of a fatty acid anhydride and a 21 carbon dibasic acid with an amine or imidazoline to form a corrosion inhibitor consisting essentially of a fatty acid derivative; dissolving the inhibitor in a fatty acid oil or ester selected from the group consisting of soybean oil or methyl soya ester; adding water dispersing agents consisting of sulfonates and a long chain ethoxylated alcohol; and adjusting the viscosity with an alcohol comprising isopropanol.

Abstract: Compounds, in particular those based on polyisobutyleneamines, are suitable as emulsifiers for water-in-oil emulsions and are used in particular as additives for fuels and lubricants.

Abstract: The corrosion of metals in contact with aqueous alkanolamine solutions in acid gas removal units is inhibited by adding to the alkanolamine solution a corrosion inhibiting amount of a polythiaether compound.

Abstract: A composition and process for inhibiting the corrosion of metallic substrates is revealed. The process utilizes an aqueous treatment solution comprising chitosan which has been reacted with an additive selected from the group consisting of phosphorus-containing compounds and sulfur-containing compounds and mixtures thereof. More preferably, the phosphorus-containing compound is a phosphonic acid and the sulfur-containing compound is a mercapto, thio, or thienyl containing compound or a mercapto functional silane. The composition and process are particularly useful in providing corrosion protection for aluminum and aluminum alloys.

Abstract: Sulfated dicarboxylic acids, amine salts thereof, or inorganic salts thereof may be used in various applications, including use as corrosion-inhibiting additives (e.g., in oil-field drilling applications and in metalworking applications), as emulsifiers (e.g., in metalworking applications), and as lubricity-enhancing additives (e.g., in metalworking applications).

Abstract: Sulfated dicarboxylic acids, amine salts thereof, or inorganic salts thereof may be used in various applications, including use as corrosion-inhibiting additives (e.g., in oil-field drilling applications and in metalworking applications), as emulsifiers (e.g., in metalworking applications), and as lubricity-enhancing additives (e.g., in metalworking applications).

Abstract: Compositions and methods have been discovered for inhibiting corrosion of metals, particularly iron alloys, in contact with fluids, either hydrocarbons, alcohols, or aqueous fluids, employing mercaptoalcohols. The mercaptoalcohols should have at least one water solubilizing hydroxyl group. In particular, suitable mercaptoalcohols have the formula: (HS)n—R—)(OH)m where R is a straight, branched, cyclic or heterocyclic alkylene, arylene, alkylarylene, arylalkylene, or hydrocarbon moiety having from 1 to 30 carbon atoms; n and m each independently averages from 1 to 3; and the heteroatom in the heterocyclic moiety substituent, if present, may be N, O, S and/or P. Preferred mercaptoalcohols include 2-mercaptoethanol, 2-mercaptopropanol, 1-mercapto-2-propanol, and 2-mercaptobutanol, in part because they are soluble in many fluids. These corrosion inhibitors show improved inhibition of both generalized and localized corrosion, specifically in high shear and high flow environments.

Abstract: Novel corrosion inhibiting compositions comprising a combination of amino thiol or amino disulfide compounds with acidic amino acid polymers inhibit carbon dioxide induced corrosion of ferrous metals in aqueous systems. Particularly effective inhibitor compositions are the natural amino acids cysteine and cystine and their decarboxylated analogues cysteamine and cystamine in combination with polyaspartic acid. The inhibitor compositions are particularly useful for preventing corrosion and scale formation in oil production applications.

Abstract: A novel composition of thiazolidines of the following formula and a method to prepare the same are disclosed. The method involves reacting a dihydrothiazole with a mixture comprising formic acid and an aldehyde. These new thiazolidines are useful as corrosion inhibitors.

Abstract: The invention concerns processes and solutions for the preliminary treatment of copper surfaces which are subsequently to be firmly bonded to organic substrates. The solution is used, in particular, for firmly bonding laminated multilayered printed circuit boards and for firmly bonding resists to the copper surfaces of printed circuit boards.

Abstract: The present invention provides a composition and method for inhibiting hydrogen permeation in metal refinery equipment comprising incorporating into a product stream handled by said equipment a polyamine amide of 3-hydrocarbyl thiopropionic acid in an amount sufficient to inhibit said hydrogen permeation. In a preferred embodiment, the polyamine amide of 3-hydrocarbyl thiopropionic acid is selected from the group consisting of propanamide, N-[2-[2-[3-(dodecenyl)-2,5-dioxo-1-pyrrolidinyl]ethyl]amino]ethyl]-3-[dodecylthio]-2-methyl and 15-thia-5,8,11-triazaheptacosanoic acid, 2-(dodecenyl)-13-methyl-4,12-dioxo, and combinations thereof.

Abstract: The invention concerns combinations of substances with (1) an aromatic mercaptothiazole or triazole, (2) a multiple substituted phenol insoluble in water, (3) L ascorbic acid or one of its salts and possibly (4) a suitable carboxylic acid/salt pair that after sublimation and condensation on metal surfaces can stabilize the pH value of a condensed water film in the range 4.8≦pH≦6.5 (referred to 25° C.), and use of the combinations of substances as vapor-phase corrosion inhibitors in packaging or for storage in closed spaces for protecting preferably metals that cannot be passivated, like copper, silver, manganese, magnesium and their alloys, against atmospheric corrosion.

Abstract: The corrosion of metal equipment which is cleaned with an inorganic acid is inhibited by treating the equipment with a corrosion inhibitor composition containing at least one quaternary ammonium compound, a sulfur-containing compound and a nonionic surfactant in a solvent.

Abstract: Novel sulfidoamidocarboxylic acids (salts), a method for the production thereof, and uses therefor are provided. Sulfidoamidocarboxylic acids (salt) with a thiazolidine residue such as dimethylthiazolidine or methylthiazolidine or thiazolidine residue (residues), or a polycarboxylic acid (salt) residue such as dicarboboxylic acid (salt) or tricarboxylic acid (salt) or tetracarboxylic acid (salt) residue, a method for the production thereof, and uses therefor are also provided.

Abstract: The present invention is directed to methods for preparing quaternary ammonium salts, particularly pyridinium and quinolinium salts. By preparing these salts in a solvent selected from the group consisting of propylene glycols, propylene glycol ethers and mixtures thereof, the production of undesirable by-products and contamination of the product with undesirable solvents are minimized, if not eliminated. Using the preparation methods of the present invention low hazard corrosion inhibitors and aqueous cleaning solutions using these inhibitors may be prepared. In fact, by preparing dodecyl pyridinium bromide in dipropylene glycol methyl ether as the solvent, a particularly desirable corrosion inhibitor characterized by a low toxicity and a high flash point has been prepared. The present invention thus provides the safer corrosion inhibitors and cleaning solutions long sought by industrial cleaning services.

Abstract: The present invention relates to the application of a coating to a pipeline, FPS (Fire Protection System) or to pipe stock from which a pipeline is fabricated. A composition which when applied to the inside surface of the pipe prevents either chemical corrosion or microbiologically influenced corrosion is disclosed. Also disclosed is a method for utilizing this material to protect both existing pipelines and the raw stock used to construct pipelines and various apparatus for applying a coating of the composition, cleaning, and maintenance of the passive coating. Also disclosed is a method to recycle the composition to be used in other industrial pacification processes.

Abstract: A composition and process for inhibiting the corrosion of metallic substrates is revealed. The process utilizes an aqueous treatment solution comprising chitosan which has been reacted with an acid selected from the group consisting of phosphonic acids, carboxylic acids and mixtures thereof. The composition and process are particularly useful in providing corrosion protection for aluminum and aluminum alloys.

Abstract: A novel composition of thiazolidines of the following formula and a method to prepare the same are disclosed. The method involves reacting a dihydrothiazole with a mixture comprising formic acid and an aldehyde. These new thiazolidines are useful as corrosion inhibitors.

Abstract: Drag reducers having the formula: 1

Abstract: Compositions and methods have been discovered for inhibiting corrosion of metals, particularly iron alloys, in contact with fluids, either hydrocarbons, alcohols, or aqueous fluids, employing mercaptoalcohols. The mercaptoalcohols should have at least one water solubilizing hydroxyl group. In particular, suitable mercaptoalcohols have the formula: (HS)n—R—(OH)m where R is a straight, branched, cyclic or heterocyclic alkylene, arylene, alkylarylene, arylalkylene, or hydrocarbon moiety having from 1 to 30 carbon atoms; n and m each independently averages from 1 to 3; and the heteroatom in the heterocyclic moiety substituent, if present, may be N, O, S and/or P. Preferred mercaptoalcohols include 2-mercaptoethanol, 2-mercaptopropanol, 1-mercapto-2-propanol, and 2-mercaptobutanol, in part because they are soluble in many fluids. These corrosion inhibitors show improved inhibition of both generalized and localized corrosion, specifically in high shear and high flow environments.

Abstract: This invention relates to a cost effective process for preparing a corrosion inhibitor/metal passivator additive for lubricant, grease and fuel applications from waste refinery streams, comprising reacting 2,5-dimercapto-1,3,4-thiadiazole either in powder form or in solution form in polar organic solvent, with disulphide oil obtained from Merox extraction/caustic wash of the refinery streams, in the presence or absence of redox agent.

Abstract: A process useful for protecting metal surfaces against corrosion in is presented involving: (a) forming a corrosion inhibitor having a compound corresponding to formula (I): where R1, R2 and R3 independently of one another represent an alkyl or hydroxyalkyl group containing 1 to 4 carbon atoms, an aryl or alkylaryl group or a group corresponding to formula (II): A− is an anion, n is the number 2 or 3, p is a number of 1 to 3 and R5 is an alkyl or alkenyl group containing 7 to 23 carbon atoms and 0, 1, 2 or 3 double bonds, and R4 is a group corresponding to formula (II) or (III): where R1, R2 and R3 are as defined above and Z is a group —(CH2)m— or a group corresponding to formula (IV):  m is an integer of 1 to 6, X is a group NH or an oxygen atom and D is a dimer fatty acid residue containing on average 36 to 54 carbon atoms; (b) combining the corrosion inhibitor with liquid aqueous, liquid non-aqueous or gaseous me

Abstract: A combination of sulfur-free azoles, preferably benzotriazole and tolyltriazole, with sulfur-containing azoles, preferably 2-mercaptobenzothiazole or mercaptobenzimidazole, prevents discoloration, staining, or corrosion of metal surfaces being coated with an organic protective coating from aqueous dispersion or solution.

Abstract: The corrosion of metals in contact with aqueous alkanolamine solution in acid gas removal units is inhibited by adding to the alkanolamine solution a corrosion inhibiting amount of a thiacrown ether compound. The compounds are monomeric or polymeric and have from 4 to about 10 sulfur atoms on each of the crown rings. The polymeric thiacrown ether ring structures are substituted with polymerized ethylenically unsaturated monomers and have from 4 to about 10 sulfur atoms on each of the crown rings. In some embodiments of the invention, a linkage “M” connects the thiacrown ether ring structures and the polymers and M is O; S; COO; C1 to C5 substituted or unsubstituted linear or branched alkylene wherein the substituent is OH, SH, F, Br, Cl, I, COOH, amine, mono- or di- C1 to C5 alkylamino, C1 to C3 lower alkanoylamino or nitro; or M is NR6 where R6 is H or C1 to C5 alkyl.

Abstract: A metal article is protected from corrosion under prolonged exposure to normal ambient atmospheric conditions which cause such corrosion by coating the metal article, optionally in the presence of an adherent organic resinous coating, which comprises treating the metal with an effective amount of effective amount of one or more hydrocarbyl-substituted sulfonyl amido diphenylamine compounds for the corrosion protection of the metal article. These compound(s) are of the formula p-(R--SO.sub.2 --NH--C.sub.6 H.sub.4 --NH)--C.sub.6 H.sub.5, where R is a substituted or unsubstituted hydrocarbyl group selected from the group consisting of alkyl, aryl, alkaryl, aralkyl, alkenyl, and cycloalkyl. A particularly preferred compound is p-(p-toluene sulfonyl amido)-diphenylamine.

Abstract: The present disclosure is concerned with inhibiting corrosion in metal, usually steel, equipment which is exposed to oil field production flow including gases, oil, water, and sand. It is injected into the aqueous stream and carried with it to contact and coat the metal surfaces. It includes a corrosion inhibitor including at least one sulfur amine based on the equation:R--X(C.sub.2 H.sub.4 NZ).sub.n C.sub.2 H.sub.4 NYIn which R is a C12-36 hydrocarbon;X is an amide-CO--NH-- or 5 membered cyclic imidazoline ring;Z is H or Y; Y is SO.sub.2 ;and .sub.n is an integer from 1 to 8.

Abstract: A water soluble corrosion inhibitor containing a compound having at least one five-membered heterocyclic ring having at least one thione group and at least one other pendant group is described. Such a corrosion inhibiting compound can be made by reacting together a thiourea and a polyalkylene polyamine. A specific example includes preparing 1-(2-aminoethyl)-2-imidazolidinethione by reacting thiourea, per se, and diethylenetriamine. These corrosion inhibition compounds have greatly reduced aquatic toxicity, and may be employed as corrosion inhibitors in hydrocarbon streams.

Abstract: Polysulfide corrosion inhibiting compositions used as adhesives and sealants for aircraft and military shelter industries are described as two-part compositions including a curing agent in the second part and a particular corrosion-inhibiting composition milled into the polysulfide in the first part where the corrosion inhibitors include a combination of a phosphosilicate with a mixture of alkali metal molybdate, ammonium benzoate, alkali metal nitrite, and benzotriazole.

Abstract: The present invention provides corrosion inhibited organic acid compositions and methods of using the compositions. The compositions basically comprise water, an organic acid, a corrosion inhibitor comprising at least one quaternary ammonium compound and a corrosion inhibitor activator selected from the group consisting of thioglycolic acid, an alkali metal thiosulfate and mixtures thereof.

Abstract: By the present invention, improved metal corrosion inhibited aqueous organic acid compositions and methods are provided. The compositions are basically comprised of water, an organic acid, a corrosion inhibitor comprising at least one rosin amine derivative and a low toxicity corrosion inhibitor intensifier selected from the group consisting of thioglycolic acid and derivatives thereof.

Abstract: The corrosion of metals in contact with aqueous alkanolamine solution in acid gas removal units is inhibited by maintaining in the alkanolamine solution a corrosion inhibiting amount of a thiodialkanol. The thiodialkanol is useful for inhibiting the corrosion of metals in both the acid gas rich and lean portions of the acid gas removal unit.

Abstract: The corrosion of metals in contact with aqueous alkanolamine solution in acid gas removal units is inhibited by maintaining in the alkanolamine solution a corrosion inhibiting amount of a compound having the formula: ##STR1## where R is S or O, and R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are independently H, C.sub.1 to C.sub.8 alkyl, C.sub.1 to C.sub.8 alkenyl, C.sub.6 to C.sub.10 aryl, C.sub.7 to C.sub.12 alkaryl, C.sub.7 to C.sub.12 aralkyl, C.sub.3 to C.sub.10 cycloalkyl, C.sub.1 to C.sub.8 thiophene, or amino groups. The alkanedithiol is useful for inhibiting the corrosion of metals in both the acid gas rich and lean portions of the acid gas removal unit.

Abstract: A method and compounds for inhibiting and controlling corrosion is disclosed. The method is particularly effective at inhibiting or preventing corrosion of ferrous-based metals in contact with aqueous systems such as cooling water systems. The method comprises introducing into the aqueous system a compound of the general formula: ##STR1## wherein R is hydrogen, alkyl, aryl, substituted alkyl or substituted aryl; R' and R" are each independently hydrogen, C.sub.1-4 alkyl or C.sub.1-4 substituted alkyl; Z is O, S, NH, or NR, where R is as described above; n is a positive integer greater than 1; f is a positive integer; and M is hydrogen, a water soluble cation (e.g., NH.sub.4.sup.+, alkali metal), or a C.sub.1 -C.sub.3 alkyl group.

Abstract: Aqueous ammoniate solutions made during the manufacture of N-hydrocarbyl thiophosphoric triamides, consisting essentially of aqueous solutions of ammonium chloride and ammonia containing a water-soluble impurity normally tending to engender corrosion of ferrous metal are rendered corrosion-resistant by dissolving therein a small corrosion-inhibiting amount (e.g., up to about 5000 ppm (wt/wt) of a water-soluble salt or oxide of zinc, aluminum, arsenic, antimony or bismuth.

Abstract: Known organic solderability preservatives (OSP) contain an azole compound and are applied on a copper surface from an acidic solution. The OSPs are not visible to the naked eye when applied. A number of dyes compatible with the OSP solution and not interfering with solderability has been identified. The composition containing such a dye can produce a layer which is visible to the naked eye when applied even in a thin layer. The suitable dyes contain a cationic imine group having the general formula ##STR1## where X.sup.- is an anion such as chloride, iodide, sulphate, etc., or an organically bonded anionic group such as sulphonate.

Abstract: A low toxic corrosion inhibitor comprises (A) mercaptocarboxylic acid having from 2 to 6 carbon atoms, and (B) a polyamine/fatty acid/carboxylic acid adduct. The preferred combination of (A) and (B) includes mercaptoacetic acid and ethylenetetramine/tall oil acd/acrylic acid adduct.

Abstract: The corrosion of metals in contact with aqueous alkanolamine solution in acid gas removal units is inhibited by maintaining in the alkanolamine solution a corrosion inhibiting amount of a thiodialkanol. The thiodialkanol is useful for inhibiting the corrosion of metals in both the acid gas rich and lean portions of the acid gas removal unit.

Abstract: The invention is an effective, easy to produce, and economical corrosion inhibitor which can be used in a variety of environments. The corrosion inhibitor of the present invention is the salt of certain tertiary amines. The corrosion inhibitor is the reaction product of one or more tertiary amines and certain carboxylic acids, preferably a mixture of mercaptocarboxylic and carboxylic acids.

Abstract: An aviation turbine oil of reduced deposit forming tendencies and improved anti-oxidancy is disclosed which comprises a major portion of a suitable aviation turbine oil base stock and a minor amount of a non-sulfur containing triazine derivative and a mercapto alkyl alcohol.

Abstract: The invention is a method for removing dissolved oxygen from alkaline water which comprises adding to alkaline water containing dissolved oxygen an effective oxygen-scavenging amount of a water-soluble sulfoxylate. A preferred material is sodium formaldehyde sulfoxylate.

Abstract: A polymer and method of controlling corrosion and the formation and deposition of scale imparting compounds in water systems is disclosed. The polymer has the general structure: ##STR1## wherein E.sup.1 comprises the repeat unit obtained after polymerization of one or more .alpha., .beta. ethylenically unsaturated monomers, selected from the group consisting of a carboxylic 3acid, lower alkyl (C.sub.1 -C.sub.6) ester or a hydroxylated lower alkyl (C.sub.1 -C.sub.6) ester of such carboxylic acid, and amide forms thereof; E.sup.2 comprises the repeat unit obtained after polymerization of one or more .alpha., .beta. ethylenically unsaturated monomer containing a sulfonic acid functionality; R.sup.1 is a hydrogen or a lower (C.sub.1 -C.sub.3) alkyl; R.sup.2 is --CH.sub.2 -- O--or --C(.dbd.O)--O--; R.sup.3 is --(--CH.sub.2 --CH(--CH.sub.2 --OH)--O--)--.sub.n ; n is an integer greater than 1; and R.sup.

Abstract: The prevention of corrosion on the surfaces of metallic pipes, heat exchangers, and the like which are in contact with industrial cooling waters, and particularly industrial cooling waters containing low levels of hardness is controlled utilizing a corrosion inhibiting amount of a composition including an alkali metal silicate, a hydroxycarboxylic acid or its water soluble salts, an organophosphonate, and a water soluble polymer which acts as a dispersant. Superior corrosion inhibition is achieved using the compositions of this invention as corrosion inhibitors, particularly in cooling water systems employing mild steel metallurgy.

Abstract: This invention relates to a metal corrosion inhibiting composition comprising in admixture: (a) an anodic silicate salt; (b) a silicate salt stabilizer; (c) a cathodic corrosion inhibitor; and water. Preferably, the corrosion inhibiting composition also contains a polymeric scale inhibitor. The invention also relates to a process for treating an open aqueous system with the corrosion inhibiting composition.

Abstract: A non-corrosive photoresist composition containing:(a) 20-70% by weight of an organic polar solvent having a dipole moment of more than 3.5;(b) 70-20% by weight of selected amine compounds;(c) 0.1-10% by weight of (2-benzothiozolylthio)succinic acid.

Abstract: The invention relates to crystalline complex compounds of formula I ##STR1## wherein the general symbols are as defined in claim 1, as corrosion inhibitors in coating compositions for protecting metallic surfaces.

Abstract: A method of controlling scale formation and deposition and corrosion in aqueous systems is described wherein a treatment solution of a substoichiometric amount of a scale/corrosion inhibitor in combination with a substituted alkylpolycarboxylate is employed. The scale/corrosion inhibitor can be a phosphonate such as hydroxyethylidene diphosphonic acid, 2-phosphonobutane-1,2,4-tricarboxylic acid, hydroxyphosphonoacetic acids, amino phosphonates; terpolymers, copolymers and homopolymers of acrylic acid, maleic acid, epoxysuccinic acids such as polyepoxysuccinic acid or mixtures thereof. The substituted alkylpolycarboxylates are compounds of the general structure: R--X--Y.sub.n wherein R is a hydrocarbon functionality having 4 to 18 carbons; X, when present, is --NH--, --NY.sup.1 --, --N-->O, --N--OC--Y.sup.1, --O-- or --S--; n is greater than or equal to 1; and Y and Y.sup.

Abstract: A general-purpose organic rust initiator which can effectively prevent corrosion of metals comprising a compound of formula (1): ##STR1## wherein R.sub.1 is a perfluoroalkyl group having 1 to 6 carbon atoms; R.sub.2 is a hydrogen atom or a group defined for R.sub.1 ; R.sub.4 is an acid group selected from --OH, --COOH, --SH, --SO.sub.2 OH, --PO(OH).sub.2, --SCH.sub.2 COOH, --SO.sub.2 NHCH.sub.2 COOH or a salt thereof; R.sub.3 is a hydrogen atom or a group defined for R.sub.4 ; or R.sub.3 and R.sub.4 together form an acid group selected from --N.dbd.N--NH--, --CH.dbd.N--N--, --SO.sub.2 --NH--CO--, --S--C(SH).dbd.N-- or a salt thereof.

Abstract: Methods are provided for inhibiting the corrosion of metals in contact with aqueous systems. Sulfono benzotriazole compounds or their salts are added to these aqueous systems to inhibit the corrosion of metal, such as iron surfaces present in cooling water systems.

Abstract: A corrosion inhibitor is disclosed which is produced by reacting an aqueous alkanolamine solution with an acid gas to form an amide and an alkanolamine salt, mixing aqueous alkanolamine with said amide and said alkanolamine salt in the absence of added inorganic base, and reacting the mixture at elevated temperature.

Abstract: The tendency of aqueous solutions of urea and other NH-containing compositions to force instability of hardness factors has been found to be detrimental to processes and apparatus employing them. The reliability of these processes and apparatus is improved by the inclusion of hardness-suppressing compositions, which preferably include both a water-soluble polymer and a phosphonate. In particular, agricultural and NO.sub.x -reducing applications are improved, especially for solutions containing urea hydrolysis products and the salts of them.