41results about How to "Excellent corrosion inhibition performance" patented technology

The present invention relates to no-phosphate corrosion and scale inhibitor and its application. The no-phosphate corrosion and scale inhibitor consists of polyaspartic acid and/or polyepoxy succinic acid 10-20 wt%, polymaleic anhydride 20-30 wt%, copolymer of acrylic acid and 2-acrylamido-2-methyl propenyl sulfonic acid 15-20 wt%, zinc salt 3-5 wt%, natural organic high molecular compound 5-12 wt%, molybdate 5-8 wt%, and other components 5-20 wt%. It has excellent corrosion retarding performance, high scale inhibiting performance and environment friendship.

The present invention relates to a phosphorus-free composite antiincrustation corrosion inhibitor. It includes polyaspartic acid and/or polyepoxysuccinic acid and at least one kind of scale inhibition and dispersion agent, in which the scale inbibition and dispersion agent is polymer containing carboxylic acid group, or it includes polyaspartic acid and/or polyepoxysuccinic acid, zinc salt, molybdate or tungstate and polymer containing carboxylic acid group. Said invention is applicable to treatment of circulating cooling water.

This invention relates to a sort of low-phosphor scale-corrosion inhibitor which includes PBTCA, (and/or HPAA), poly-aspartic acid and/or polyepoxysuccinic acid and carboxyl-containing polymer. This inhibitor can be used to treat recirculated cooling water in ways such as inhibiting the forming of CaCO3 scale, inhibiting corrosion and stabilizing Zn2+ in water. Its phosphor concentration in recirculated water is no more than 1mg/L, reducing the hazard of phosphor discharge to environment.

The present invention relates to a kind of composite antiscale corrosion inhibitor containing polyepoxy succinic acid. The composite antiscale corrosion inhibitor includes two kinds of organic phosphonic acid and polyepoxy succinic acid, and may contain zinc salt and copper corrosion inhibitor, if necessary. The composite antiscale corrosion inhibitor is suitable for processing circular cooling water and can make the calcium hardness reach 1200 mg/L.

The invention provides a molybdate-phosphonate compound corrosion inhibitior and the method for preparing the same. Said corrosion inhibitior comprises of solidum molybdate 1-20 wt%, organic phosphine 1-40 wt%, oxidant 1-10 wt% and excipient 97wt%. The compound corrosion inhibitior is characterized by convenient operation and management and satable corrosion inhibition performance.

The invention discloses a corrosion inhibition foam water discharging agent for an oil-gas well and a preparation method of the corrosion inhibition foam water discharging agent, solving the problem that the traditional single corrosion inhibitor or foaming agent is high in operating cost and can not be effectively synergically used. The corrosion inhibition foam water discharging agent comprises the following components in percentage by weight: 20%-40% of oleic acid based imidazoline quaternary ammonium salt, 1%-10% of dodecyl dimethyl benzyl ammonium chloride, 10%-30% of dodecyl dimethyl betaine, 5%-10% of alkylphenol polyoxyethylene and 10%-30% of water. The corrosion inhibition foam water discharging agent prepared through a formula has the advantages of excellent foam discharge property and excellent corrosion inhibition property.

The invention discloses an imidazoline quaternary ammonium salt corrosion inhibitor which is prepared from the following preparation raw materials including a corrosion inhibitor main component raw material and an additive raw material; the corrosion inhibitor main component raw material is one of oleic acid, benzoic acid, fatty acid, lauric acid and natural eleostearic acid; and the additive rawmaterial includes diethylenetriamine, dimethyl sulfate or benzyl chloride, boric acid and xylene. The invention also discloses a preparation method of the imidazoline quaternary ammonium salt corrosion inhibitor and aims at solving the problem of poor corrosion inhibition performance of the existing corrosion inhibitor in an acid medium. The preparation method is simple, is liable to operate and can perform recovery utilization on a solvent. An imidazoline corrosion inhibitor has the advantages of low toxicity, high slow release efficiency and wide use range. Physical characterization and performance test results of the corrosion inhibitor show that oleic acid imidazoline quaternary ammonium salt has better slow release performance, and the slow release performance of the benzyl chloride is better than the slow release performance of the dimethyl sulfate after being quaternized. A polarization curve test shows that synthesized corrosion inhibitors are all cathodal depression type corrosion inhibitors.

The invention relates to a phosphorus-free composite scale-inhibiting corrosion-retarding agent and an application thereof. The phosphorus-free composite scale-inhibiting corrosion-retarding agent comprises a water-soluble borate and at least one scale-inhibiting dispersant, wherein the scale-inhibiting dispersant is a carboxylic-group-containing phosphorus-free polymer. The comprehensive property of the phosphorus-free composite scale-inhibiting corrosion-retarding agent is good. The agent has good CaCO3 scale inhibiting performance, good stabilizing performance upon Zn<2+> in water, and good corrosion retarding performance. The agent can be used in treating circulating cooling water. With the agent, harm of phosphorus discharging to the environment can be solved.

The invention relates to a preparation method of a non-phosphorus corrosion and scale inhibitor. The preparation method of the non-phosphorus corrosion and scale inhibitor is characterized by being blended from the following components in percentage by weight: 1) 5-15% of polyepoxysuccinic acid, 2) 5-15% of a dirt dispersion agent, 3) 20-50% of organic carboxylic acid, 4) 5-10% of zinc salt, 5) 0.1-0.5% of imidazole, 6) 0.5-3% of an inorganic corrosion inhibitor, and 7) the balance of water according to mass percent, wherein the polyepoxysuccinic acid is a market-sold liquid preparation, the solid content is 40%, and the degree of polymerization n is an integer of 10-50. The preparation steps are as follows: adding the zinc salt and the inorganic corrosion inhibitor in a fixed amount of water, fully stirring to completely dissolve the zinc salt and the inorganic corrosion inhibitor, then adding the polyepoxysuccinic acid, the dirt dispersion agent and the organic carboxylic acid, fully stirring, finally adding the imidazole until the imidazole is completely dissolved, and filtering.

The invention provides an inverter cooling liquid. The inverter cooling liquid consists of the following raw materials in percentage by weight: 0.5-3 percent of 2-hydroxyphosphonoacetic acid, 0.2-3 percent of amyl phosphate, 0.01-1 percent of 5-carboxy benzotriazole, 0.1-2.0 percent of 2,4,6-tri-(aminocaproic acid)-1,3,5-triazine, 0.5-1.0 percent of inorganic base, 0.001-0.1 percent of antifoaming agent, 30-60 percent of water and the balance of glycol. The inverter cooling liquid has excellent corrosion inhibiting performance of an aluminum magnesium alloy, better heat exchange performance and compatibility among PVC, ethylene propylene diene monomer rubber and butadiene styrene rubber.

The invention discloses a preparation method of substituted pyridine carbonylhydrazone metal corrosion inhibitor. The method comprises the following steps: using methylisonicotinate and hydrazine hydrate in a molar ratio of 1:1-1.2:1 and absolute ethanol or methanol used as solvent of which volume is 3-6 times of hydrazine hydrate to react for 6-8h in a three-neck flask under the condition of refluxing at 70-80 DEG C and magnetic stirring, obtaining a product to perform reduced pressure distillation, recrystallizing with absolute ethanol, drying to obtain pyridine formylhydrazine, then using the obtained pyridine formylhydrazine and o-vanillin in a molar ratio of 1:1-1:1.2 and absolute ethanol or methanol used as solvent of which volume is 2-5 times of pyridine formylhydrazine to react for 7-9h under the condition of refluxing at 70-90 DEG C and magnetic stirring, cooling, performing suction filtration, washing with absolute ethanol, and recrystallizing. The preparation method of the invention designs the corrosion inhibitor molecule with good oil solubility which meets the environmental protection requirements; and the corrosion inhibitor molecule is characterized by good biodegradability, low toxicity and corrosion resistance within the pH value range of 4-9, and has good corrosion resistance to A3 carbon steel and copper.

The invention relates to a preparation method of naphthenic acid imidazoline and the lycine of amide thereof and the application thereof in an HCl-H2S-H2O system. The naphthenic acid imidazoline reacts with chloroactic acid or sodium chloroacetate or the mixture of the chloroactic acid and the sodium chloroacetate at a controlled temperature of 50-95 DEG C and a pH value of 7-10 for three to ten hours to obtain the naphthenic acid imidazoline and the lycine of the amide thereof; the moll ratio of naphthenic base contained in the naphthenic acid imidazoline to the chloroactic acid or the sodium chloroacetate or the mixture of the chloroactic acid and the sodium chloroacetate is 1.0:4.1-13.0. The obtained product is applied in the HCl-H2S-H2O system as a water soluble corrosion inhibitor. The preparation method of the invention is characterized by comparatively low cost, simple and convenient preparation and short reaction time. The naphthenic acid imidazoline and the lycine of the amide thereof as the water soluble corrosion inhibitor have excellent corrosion inhibition performance and good intermiscibility with organic amine, thereby being beneficial for industrial application.

The invention relates to a preparation method for a corrosion inhibition component as well as a product and application thereof. The method comprises the following steps: putting an organic ammonium salt and thiocyanate in a polar solvent for reaction to generate precipitates, and removing insoluble substances and the polar solvent in the reaction system to obtain the corrosion inhibition component. According to the corrosion inhibition component, the pH value is close to a neutral value, the solubility is good, and the corrosion inhibition performance is good.

The invention discloses a pH stimulation response intelligent repair coating and a preparation method thereof. The pH stimulation response intelligent repair coating comprises a corrosion inhibitor, a corrosion inhibitor carrier, a coating layer, a film forming substance, a curing agent and a solvent, wherein the corrosion inhibitor is 2-chloromethyl benzimidazole, the corrosion inhibitor carrier is mesoporous fumed silica, the coating layer is poly (sodium p-styrenesulfonate) and polyethyleneimine, the poly (sodium p-styrenesulfonate) and the polyethyleneimine sequentially coat the surface of the mesoporous fumed silica loaded with the 2-chloromethyl benzimidazole, epoxy resin is used as a film forming substance, and absolute ethyl alcohol is used as a solvent. When the pH value of a corrosive medium is not higher than 4, the prepared pH stimuli-responsive intelligent repair coating has a very prominent protection effect on a metal substrate. The lower the pH value is, the better the protection effect is.

The invention relates to the field of inhibiters, and discloses an acid adding inhibiter and a method for acid pickling through the acid adding inhibiter. The acid adding inhibiter comprises quaternary ammonium compounds, thiourea, aluminum phosphate and/or aluminum dihydrogen phosphate and phytic acid and/or tannic acid. The acid adding inhibiter can be used in special steel such as automobile structural steel, is small in use amount and has excellent corrosion inhibition performance. Automobile structural steel hot-rolled acid pickling plates with good surface quality can be obtained. Besides, operation cost is low, and economic benefits are good.

The invention discloses a compound imidazoline corrosion inhibitor. The compound imidazoline corrosion inhibitor is formed through mixing 20%-30% of imidazoline compound II, 20%-30% of imidazoline compound III, 5% of ethanediol and water. The compound imidazoline corrosion inhibitor disclosed by the invention is applicable to an oil-water mixed liquid system during an oilfield exploitation, production, and storage and transportation process, good in corrosion inhibition performance in an environment of pure carbon dioxide and in an environment of coexistence of hydrogen sulphide and carbon dioxide, and capable of efficiently inhibiting corrosion caused due to H2S, CO2, salts and the like.

The invention provides a plant type composite efficient corrosion inhibitor. The plant type composite efficient corrosion inhibitor is prepared from the following raw materials in percentage by mass: 12 to 66.0 percent of plants, 5.0 to 16.0 percent of sodium molybdate, 1.5 to 12 percent of sodium gluconate, 3.5 to 25 percent of sodium tartrate, 0 to 23 percent of zinc sulfate and 4.0 to 23.0 percent of monopotassium phosphate. The corrosion inhibitor disclosed by the invention is high in corrosion inhibition capability and can achieve a corrosion inhibition effect on a chlorine salt type snow-melting agent. After the corrosion inhibitor is added, the corrosion of the chlorine salt type snow-melting agent to metal and concrete and the harm to vegetation can be reduced. The corrosion inhibitor is mainly prepared from plants, is non-toxic, and is a very efficient and environment-friendly corrosion inhibitor. The invention further provides a preparation method and application of the plant type composite efficient corrosion inhibitor.

The invention discloses an ecological water treatment chemical with both corrosion inhibition and scale inhibition performances. The ecological water treatment chemical comprises beta-dicarbonyl compound modified polyaspartic acid used as a main agent, and sodium molybdate, hydroxyethylidene diphosphonic acid and zinc salts used as auxiliary agents. The ecological water treatment chemical of the invention can be applied to a circulating cooling water treatment system, and has excellent corrosion and scale inhibition performances; the chemical has a calcium carbonate inhibition rate of 100% andan annual A3 carbon steel corrosion rate of less than 0.075 mm; the concentration of Zn<2+> in discharged water is 0-1.5 mg/L, and the content of phosphorus in the discharged water is 0-0.05 mg/L; soharm to the environment due to high contents of phosphorus and zinc is avoided, and increasingly strict environmental protection requirements are met.

The invention belongs to the technical field of metal material processing, particularly relates to a corrosion inhibitor suitable for dynamic strong alkaline cleaning of metal workpieces, and furtherdiscloses a preparation method of the corrosion inhibitor. The corrosion inhibitor suitable for dynamic strong alkaline cleaning of the metal workpieces is synthesized from raw materials of glycerin triglycidyl ether, 4,4-diaminodiphenylmethane tetraglycidyl amine, ethylenediamine, cystine, DMF, 4-imidazolylethylamine, aminethronii hydrobromidum, N,N-diphenylhydrazine and benzotriazole as raw materials. Through the synergistic effect between properties of all components, a corrosion inhibitor product is high in alkali resistance, can be further stirred in an alkaline environment for a long time without decomposition, can be directly used for the dynamic strong alkaline cleaning operation step of the metal workpieces such as brass, and has the more stable corrosion inhibition property and the higher corrosion inhibition effect.

The invention discloses an efficient low-phosphorus scale and corrosion inhibitor and a preparation method thereof. The efficient low-phosphorus scale and corrosion inhibitor comprises the following raw materials in parts by weight: 5-15 parts of organic phosphine, 10-20 parts of sulfonate copolymer, 10-15 parts of carboxylic acid polymer, 10-20 parts of borate, 5-15 parts of sodium nitrite, 5-15parts of zinc salt and 10-50 parts of deionized water. The efficient low-phosphorus scale and corrosion inhibitor has the characteristics of small amount and high efficiency. The efficient low-phosphorus scale and corrosion inhibitor is suitable for a circulating cooling water system with low hardness and low alkalinity, and has excellent corrosion inhibition performance on carbon steel and stainless steel equipment.

The invention belongs to the field of fine organic chemical engineering, and in particular relates to a mixed fatty group di(benzimidazoline-ammonium-salt) as well as a preparation method and application thereof. The invention provides a structure of the mixed fatty group di(benzimidazoline-ammonium-salt), and further provides a preparation method and application of the mixed fatty group di(benzimidazoline-ammonium-salt). After a mixed fatty group and a quaternary ammonium group are introduced into benzimidazoline molecules, the hydrophobicity of a protection membrane can be improved, the metal corrosion velocity can be reduced, and the water solubility of a corrosion inhibitor can be improved. Results of experimental determination show that the corrosion inhibition effect of the corrosion inhibitor provided by the technical scheme of the invention is remarkably superior to that of a conventional corrosion inhibitor. The technical defects that in the prior art a corrosion inhibitor is poor in corrosion inhibition effect and poor in water solubility are solved. In addition, swill-cooked dirty oil is used as a raw material of the mixed fatty group di(benzimidazoline-ammonium-salt), so that the production cost is lowered, and furthermore the environment can be protected.

The invention discloses a non-phosphorus corrosion and scale inhibitor suitable for the low-hardness water quality. The non-phosphorus corrosion and scale inhibitor is characterized by comprising, by weight, 15% to 20% of AMPS quadripolymer water solutions with the concentration of 30%, 10% to 15% of polyaspartic acid solutions the concentration of 50%, 5% to 10% of hydroxyl carboxylate, 5% to 15% of long-chain alkyl sulfonates, 5% to 10% of N-long-chain alkyl amino carboxylate, 1% to 5% of tungstate, 1% to 3% of zinc salt, 1% to 2% of pH stabilizers selected from sodium hydroxide or hydrochloric acid, and the balance deionized water.

The invention provides a preparation method and preparation system of a special corrosion inhibitor for metal equipment. The preparation method comprises the following steps that A, abietic acid and K2CO3 are dissolved in dimethylformamide, iodomethane (MeI) is added, stirring is carried out for 3 hours, and a TLC point plate reacts completely; and B, reduced pressure rotary evaporation is carriedout to remove MeI, extracting is carried out with ethyl acetate (EA), concentrating is carried out, and washing with water is carried out to remove dimethylformamide. According to the preparation method and preparation system of the special corrosion inhibitor for the metal equipment, the corrosion inhibitor has good anti-H2S/CO2-corrosion inhibition performance, the thermal stability is good, the toxicity is low, no special pungent smell is generated, the corrosion inhibition rate of the corrosion inhibitor is high and can reach 90%, a second motor drives a filter screen to rotate, so that solid in a mixing solution in a fixing groove is filtered through the filter screen, and the solid falls into a collection box and liquid flows into a sliding shell from a filtering opening. The deviceis simple in structure, solid and liquid can be separated from each other, and the problem of low filtering speed due to the fact that the solid blocks the filtering opening can be solved.

The invention discloses a high-temperature corrosion inhibitor for acidification. The high-temperature corrosion inhibitor comprises the following components in percentage by mass: 30-40% of a corrosion inhibition main agent, 10-17% of an emulsifier, 5.5-9% of a high-temperature synergist, 5-10% of C6-C10 straight-chain alkynediol and the balance of water, wherein the corrosion inhibition main agent is a mixture of a mixed solution containing aldehyde ketone amine polycondensate and polyaspartic acid; the mixed solution containing the aldehyde ketone amine condensation polymer is a mixed solution generated by condensation polymerization of formaldehyde, acetophenone and polyethylene polyamine, or a mixed solution generated by condensation polymerization of formaldehyde, cyclohexanone and polyethylene polyamine; the high-temperature synergist is a mixture of a metal oxide and an alkali metal organic salt; the temperature resistance of the high-temperature corrosion inhibitor for acidification reaches 160-180 DEG C, the corrosion inhibition performance is good, water is adopted as a solvent to replace methanol which is mostly adopted as a solvent in a traditional corrosion inhibitor,and thus the high-temperature corrosion inhibitor for acidification is more environmentally friendly, safe and reliable in product performance and more convenient to transport.