Hydrazine corrosion inhibitor

Oxygen O2 Corrosion of water lines, heat exchange equipment, boilers, return lines, etc. Deaeration, sodium sulflte, corrosion inhibitors, hydrazine or suitable substitutes... 

HydroxyethyUiydrazine (11) is a plant growth regulator. It is also used to make a coccidiostat, furazoHdone, and has been proposed, as has (14), as a stabilizer in the polymerization of acrylonitrile (72,73). With excess epoxide, polysubstitution occurs and polyol chains can form to give poly(hydroxyaLkyl) hydrazines which have been patented for the preparation of cellular polyurethanes (74) and as corrosion inhibitors for hydrauHc fluids (qv) (75). DialkyUiydrazines, R2NNH2, and alkylene oxides form the very reactive amineimines (15) which react further with esters to yield aminimides (16) ... 

Hydrazide method, for covalent ligand immobilization, 6 396t Hydrazine, 70 727 73 562-607. See also Anhydrous hydrazine analytical methods for, 73 588-589 aqueous grades of, 73 585 chemical properties of, 73 566-576 as a corrosion inhibitor, 73 595 economic aspects of, 73 584-585 electrode potentials of, 73 566t explosive limits of, 73 566 handling and storage of, 73 586-588 as a hazardous material, 73 585... 

Hydrazine Tobacco plants, polymerization catalysts, pharmaceutical products, corrosion inhibitor in boiler water, propellant fuels Production of NO2... 

Several types of corrosion inhibitors have been investigated in the last 20 years [53-55] these include calcium and sodium nitrites, sodium benzoate, sodium/potassium chromate, sodium salts of silicates and phosphates, stannous chloride, hydrazine hydrate, sodium fluorophosphate, permanganate, aniline and related compounds, alkalis, azides, ferrocyanide, EDTA and many chelating compounds. However, in terms of field practice and research data, nitrite-based compounds occupy a dominant position. 

Hydrazine compounds are widely used as fuels, corrosion inhibitors, catalysts, and dyes. However, such compounds are recognized as toxic agents consequently, their detection and processing are of much concern. Only a few recent papers pertain to the catalytic oxidation of hydrazine [148-150], with special emphasis... 

Hydrazine is a chemical intermediate for explosives. It is used in soldering fluxes, as a laboratory reagent, and as a substance to reduce metals of silver, gold, and copper. Hydrazine is also used in the manufacture of certain drugs, dyes, rocket fuel, photographic supplies, insecticides, plastics, corrosion inhibitors, and textiles. 

Miscellaneous Refrigerant, detergents, corrosion inhibitor (petroleum refineries), stabilization of latex, insecticides, nitroparaffins, hydrazine... 

Amcrziiie . (Drew Ind. Div.] Hydrazine sol a corrosion inhibitor for feed and boiler waters. 

S. Sankarapapavinasam, F. Pushpanaden, M.F. Ahmed, Hydrazine and substimted hydrazines as corrosion inhibitors for lead in acetic acid, Brit. Corros. J. 24 (1989) 39—42. 

Uses Reducing agent corrosion inhibitor wastewater treatment electrolytic plating redox reactions polymerization catalyst organic hydrazine derivs. rocket propellant corrosion inhibitor, oxygen scavenger in boiler... 

Ammonium dimolybdate corrosion inhibitor, vapor-phase Dicyclohexylamine nitrite 2-Dimethylamino-2-methyl-1-propanol corrosion inhibitor, waterfloods Cocodiamine acetate Etidronic acid corrosion inhibitor, water systems Acrylic resin Hydrazine corrosion inhibitor, water treatment Ammonium dimolybdate Calcium oxide Etidronic acid Lauramine 2-Mercaptobenzothiazole Myristamine Myristamine acetate PEG-8 dioleate PEG-3 tallow aminopropylamine PEG-8 tallow aminopropylamine Potassium phosphate Potassium thiocyanate Potassium tripolyphosphate Sodium chromate Sodium molybdate dihydrate... 

Some corrosion inhibitors are hexamine, phenylenediamine, dimethythanolamine, sodium nitrite, drmamaldehyde, condensation products of aldehydes and amines, chromates, nitrites, phosphates, hydrazine, ascorbic add, and others. 

For copper corrosion in hot H2SO4, Ross and Berry found that benzotriazole (BTA) inhibits the rate of copper dissolution flow rate and aeration change the inhibitor concentration profile, and a film composed of the cuprous salt of BTA is formed. Other effective inhibitors for copper in H2SO4 include 2,4-dinitrophenyl-hydrazine, benzimidazole, indazole, and quinoline. Various azoles appear to be effective corrosion inhibitors for brass, as well as copper. Finally, Subra-manyan et al. studied the corrosion inhibition mechanisms of the alkaloids quinine (C21H22N2O2) and strychnine (C21H22N2O2). Both compounds inhibit the corrosion of copper, in 1% H2SO4 at 86°F (30°C), relatively well, and both chemisorb and... 

Volatile corrosion inhibitors (VCIs), also called vapor phase inhibitors (VPIs), are compoimds transported in a closed environment to the site of corrosion by volatilization from a source. In boilers, volatile basic compounds, such as morpholine or hydrazine, are transported with steam to prevent corrosion in condenser tubes by neutralizing acidic carbon dioxide or by shifting surface pH toward less acidic and corrosive values. In closed vapor spaces, such as shipping containers, volatile solids such as salts of dicyclohexylamine, cyclohexylamine, and hexamethylene-amine are used. On contact with the metal surface, the vapor of these salts condenses and is hydrolyzed by any moisture to liberate protective ions. It is desirable, for an efficient VCI, to provide inhibition rapidly and to last for long periods. Both qualities depend on the volatility of these compounds, fast action wanting high volatility, whereas enduring protection requires low volatility. 

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