692 results about "Polymaleic anhydride" patented technology

The invention belongs to the environmental protection field, concretely relating to a green environmental-protection composite corrosion inhibition antifouling agent for water circulating cooling, compounded of antifouling dispersants and corrosion inhibitors: polyepoxy sodium succinate, polymerized sodium aspartate, hydrolyzed polymaleic anhydride, sodium gluconate, zinc salt, in the mass ratio of 1-6 to 1-4 to 2-6 to 1-2 to 1-2. And it has characters of no phosphorus and biodegradability, an environment-friendly water quality stabilizer, used in a water-circulating cooling system to play the role in corrosion inhibition and antifouling.

The invention discloses a preparing method of effective maleic anhydride system polymeric compound antisludging agent belonging to chemical industry technical and water disposal domain, which comprises the following steps: adding overdraw multi-double bond monomer in the maleic anhydride series antisludging agent synthetic course; proceeding polymerization; increasing molecular weight and combination property of maleic anhydride homopolymer. This invention can be applied to recycle cooling water system, boiler water, oil field water, paper making and seawater desalinization.

The invention discloses a special improved organic fertilizer for saline-alkali soil. The special improved organic fertilizer comprises the following components by weight: 89%-91% of straw organic fertilizer, 7%-9% of saline-alkali soil modified material, and 1%-3% of medium-micro element additive. The invention further discloses a preparation method for the special improved organic fertilizer for saline-alkali soil. The preparation method comprises the following steps: mixing and piling 89%-91% of the straw organic fertilizer, 7%-9% of the saline-alkali soil modified material, and 1%-3% of the medium-micro element additive by weight to be long strips; uniformly stirring the long strips by a turner, adding hydrolytic polymaleic anhydride organic aqueous solution, and regulating the pH of the solution to be 3-4 to obtain the special improved organic fertilizer for saline-alkali soil. The special improved organic fertilizer for saline-alkali soil can effectively improve soil hardening, increase micro elements and organic nutritional ingredients of humic acid in the saline-alkali soil and improve quality of humus, thereby improving soil fertility and achieving survival rate of planted seedling of more than 95%.

The invention provides a corrosion-inhibition scale inhibitor composition, a corrosion-inhibition scale inhibitor and an application thereof, wherein the corrosion-inhibition scale inhibitor composition comprises water-soluble oxidizable inorganic metal salts, water-soluble inorganic zinc salts, phosphine compounds and polymers; the weight ratio of the water-soluble oxidizable inorganic metal salts, the water-soluble inorganic zinc salts, the phosphine compounds and the polymers is 0.005-0.2:0.05-1:0.1-0.75:1; the polymer is selected from one or more than one of hydrolyzed polymaleic anhydride, polyaspartic acid, polyepoxy succinic acid, and polyacrylic acid polymers. The corrosion-inhibition scale inhibitor composition and the corrosion-inhibition scale inhibitor provided by the invention has both good corrosion inhibition and scale inhibition.

The invention discloses a soil melioration matrix prepared from garden waste and a preparation method of the soil melioration matrix. The soil melioration matrix comprises the following components in parts by weight: 0.05-0.08 part of garden waste subjected to fermentation treatment by a microorganism bacterium agent, 0.01-0.03 part of natural mineral and 0.005-0.01 part of polymaleic anhydride. According to the invention, the soil melioration matrix is added to saline soil, so that the physicochemical property of soil can be improved, the porosity is increased, the permeability is strengthened, the soil structure is improved, and the salt-obstruction and fertilizer conservation effects are remarkable.

The invention provides a composite phosphorus-free corrosion and scale inhibitor and its application. The composite phosphorus-free corrosion and scale inhibitor is composed of a corrosion and scale inhibitor A and a corrosion and scale inhibitor B, wherein the corrosion and scale inhibitor A is obtained through mixing polyepoxysuccinic acid (PESA), sodium gluconate and water; and the corrosion and scale inhibitor B is obtained through mixing hydrolytic polymaleic anhydride (HPMA), an acrylic acid / 2-acrylamide-2-methylpropanesulfonic acid copolymer (AA / AMPS), a zinc salt, a fluorescent tracer and water. The composite phosphorus-free corrosion and scale inhibitor, which compounds the corrosion and scale inhibitor A and the corrosion and scale inhibitor B according to a weight ratio of the corrosion and scale inhibitor A to the corrosion and scale inhibitor B of 1:2, has the advantages of excellent corrosion and scale inhibition effects, avoiding of a water eutrophication problem caused by phosphorus discharge, environmental pollution mitigation, and good environmental protection property.

The invention provides a composite corrosion inhibition antisludging agent for ultralow rigidity circulation cooling water. The composite corrosion inhibition antisludging agent comprises the following raw materials in parts by weight: 5-15 parts of amino trimethylene phosphonic acid, 5-15 parts of hydroxyethylidene diphosphonic acid, 1-15 parts of diethylenetriamine pentamethylene phosphonic acid, 5-15 parts of hydrolytic polymaleic anhydride, 2-15 parts of terpolymer, 2-20 parts of heptahydrate, 0.1-2 parts of hydroxy benzotriazole and 3-79.9 parts of pure water. The hydroxy benzotriazole is added after the amino trimethylene phosphonic acid, the hydroxyethylidene diphosphonic acid, the diethylenetriamine pentamethylene phosphonic acid, the hydrolytic polymaleic anhydride and the terpolymer are stirred and mixed; and the composite corrosion inhibition antisludging agent is obtained by adding the water and the heptahydrate until the hydroxy benzotriazole is entirely dissolved. The hydrolytic polymaleic anhydride and the terpolymer used by the invention have a good diffusion effect, and can effectively prevent carbonates, phosphates and the like from being deposited and scaled. Meanwhile, the hydrolytic polymaleic anhydride and the terpolymer belong to a non-phosphate monomer, so that the agent phosphate content is reduced. Therefore, the composite corrosion inhibition antisludging agent is beneficial to environmental protection.

The invention discloses a composite scale inhibitor which is applicable to high-hardness high-alkali industrial circulating water, and the scale inhibitor consists of HEDP, polyaspartic acid, polymaleic anhydride, polyacrylic acid dispersant and the like. Wherein, the polyacrylic acid dispersant can be one or more of polyacrylic acid ternary dispersants or quaternary dispersants. The composite scale inhibitor has excellent scale inhibition performance and very low formation rate of calcium carbonate scale during the using process, the discharged waste water under the use of the formula can not cause the nutrition-rich pollution to the environment, thereby belonging to environment-friendly products and being particularly applicable to processing the circulating water with high calcium hardness and high alkaline hardness. The cost of using the formula for processing the industrial circulating water is very low, and the cost of a medicament added for processing each ton of water is less than 0.7 yuan, thereby having very high economic value.

A rubber matrix including a) 10-90 % (v / v) of natural rubber, b) one or more first compatabilisers selected from a group of polymers containing either i) a nitrile group, ii) a halogen, iii) an acetate group, iv) an epoxide, v) a styrene, or vi) an acrylate and c) one or more second compatabilisers which are interfacial copromoters selected from a group comprising either i) polyvinyl acetate, ii) ethylene vinyl acetate, iii) polyacrylonitrile or high nitrile resin, iv) acrylamide or polyacrylamide, v) a phenolic resin, vi) an acrylate polymer, vii) a halogenated polymer, viii) maleic anhydride or polymaleic anhydride, or ix) a bismaleimide. The rubber matrix may be mixed with one or more thermoplastics selected from a group comprising either i) polyurethanes, ii) polyesters, iii) polyamides, iv) acrylates, v) acrylonitrile butadiene styrene, vi) polyolefins, or vii) cellulose esters to form a rubber thermoplastics composite.

The invention discloses a multifunctional scale and corrosion inhibitor which integrates four effects, namely, scale inhibition, scale removal, corrosion inhibition and perfillmimg, and a preparation method thereof. The scale and corrosion inhibitor is of a nitrogen-free, non-phosphorus and molybdenum formula, and is prepared by compounding a non-phosphorus scale and corrosion inhibition component, methylbenzotriazole, hydrolytic polymaleic anhydride, sodium molybdate and sodium gluconate. According to the multifunctional scale and corrosion inhibitor, usage of phosphorus and nitrite is avoided, usage of molybdate is reduced, the multifunctional scale and corrosion inhibitor has the characteristics of being efficient, practical, non-toxic, environment-friendly, and low in cost, is applicable for scale and corrosion inhibition of water with high salinity and high degree of mineralization, can be widely applied to water treatment fields such as cold and hot circulating water, softened water and reverse osmosis, and the oilfield exploitation field.

The invention discloses an ash water scale inhibitor as well as preparation and screening test methods thereof. the ash water scale inhibitor is prepared from raw materials in percentage by weight as follows: 2%-10% of HEDP, 10%-15% of 2-phosphonobutane-1,2,4-tricarboxylic acid, 20%-30% of a maleic acid-acrylic copolymer, 10%-20% of hydrolytic polymaleic anhydride, 5%-10% of an acrylic acid-hydroxypropyl acrylate copolymer, 5%-15% of a phosphono-carboxylic acid copolymer, 5%-10% of an acrylic acid-2-acrylamide-2-methyl propane sulfonic acid copolymer and the balance of purified water. The prepared ash water scale inhibitor has calcium resistance, pH resistance and high-temperature resistance, has good corrosion and scale inhabitation performance, has good scale inhibition and prevention effects and is applicable to ash water with water quality characteristics of high temperature, high alkali and high pH, particularly to a power plant ash removal system. The ash water scale inhibitor screened with the ash water scale inhibitor screening test method reaches the expected corrosion and scale inhabitation effects, and the hydraulic ash removal efficiency is improved.

The invention discloses a water-based working liquid for electrical discharge wire cutting, which comprises the following components by weight percent: triethanolamine, boric acid, oleic acid, polyethyleneglycol PEG-600, petroleum sodium sulfonate, petroleum barium sulfonate, sodium dodecyl sulfate, nonylphenol ethoxylate OP-10, fatty alcohol-polyoxyethylene ether MOA-15, Span S-80, detergent 6501, sodium alcohol ether sulphate AES, hydrolytic polymaleic anhydride HPMA, 1-hydroxy ethylidene-1,1-diphosphonic acid HEDP, glycerol, ethanol, sodium benzoate and water. The invention further relates to a preparation method of the water-based working liquid for electrical discharge wire cutting. The water-based working liquid with the pH ranging from 7.5 to 8.0 is yellowish and transparent, free from toxicity and irritating odor, and easy for biodegradation, and BOD (Biochemical Oxygen Demand), COD (Chemical Oxygen Demand) and other indexes in discharged sewage are in compliancy with the emission standards for environmental protection. The water-based working liquid disclosed by the invention can ensure the bright processed surface of workpiece even when being used in hard water regions.

The invention discloses preparing methods of carbon quantum dots and a phosphorescence composite material of the carbon quantum dots. The carbon quantum dots are synthesized through aniline monomers such as 3,5-diaminobenzoic acid, 2,4-diaminobenzenesulfonic acid and 2,6-diaminotoluene under the room-temperature condition. The composite material is compounded by the water-soluble carbon quantum dots and a hydrophilic poymer such as polyacrylic acid, sodium polyacrylate, polyacrylamide, polymaleic anhydride, polymaleic acid and sodium polystyrenesulfonate. The preparing technology is simple, the raw materials are easy to obtain, the cost is low, and the preparing method is poisonless and environmentally friendly. The carbon quantum dots are diversified, and have the advantages of being highin fluorescence quantum efficiency, good in water solubility and the like; the phosphorescence composite material is diversified, long in phosphorescence service life at the room temperature, and excellent in phosphorescence performance and has a huge application prospect in the fields of counterfeiting prevention, display, biological and chemical detection and the like.

The invention relates to a scale and corrosion inhibitor for circulating cooling water. The inhibitor comprises components of, by weight: 15% to 30% of 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTCA) and / or 5% to 20% of 2-hydroxyl-phosphino acetic acid (HPAA); and 10% to 30% of amino trimethylene phosphonic acid (ATMP) and / or 5% to 10% of 1-hydroxy ethylidene-1,1-diphosphonic acid (HEDP) and / or 10% to 20% of polyacrylic acid (PAA) and / or 5% to 20% of polymaleic anhydride (PMA); and 1% to 2% of benzotriazole (BTA) or 1% to 2% of methylbenzotriazole (TTA); and / or 10% to 20% of phosphono-carboxylic acid copolymer (MAHS) and rest amount of deionized water. The CaCO3 inhibiting performance and corrosion inhibiting performance of the present inhibitor surpass that of the IDA-II scale and corrosion inhibitor. The Zn<2+> stabilizing capacity of the present inhibitor also surpasses that of IDA-II inhibitor. When the present inhibitor is added with a dosage of 50mg / L to 100mg / L, the phosphorcontent in the cooling water is only 0.210mg / L (calculated according to PO4<3-> content), thus the phosphor content is below the limited phosphor discharging quantity (which is below or equal to 0.5m / L) within the primary standard.

The invention discloses a novel interfacial mortar, comprising the following components by weight percent: 35% of cement, 40% of yellow sand, 8.5% of heavy calcium carbonate, 10% of talcum powder, 0.5% of lignocellulose and 6% of master batch. The master batch comprises the following components by weight percent: 1.67%-8.33% of polymaleic anhydride, 4.17%-7.5% of hydroxypropyl methyl cellulose ether, 5%-8.33% of polyvinyl alcohol and 66.67%-88.33% of limestone. The novel interfacial mortar has advantages of excellent comprehensive adhesive ability, less excitant odor, fewer volatile organic compounds (VOC) and the like, reaches and exceeds a performance index of the interfacial mortar in the standard JG158-2004, thereby promoting the development of producing energy-saving building materials, improving the level of saving energy and protecting environment and achieving good economical benefits and social benefits.

The invention discloses a reverse osmosis membrane used corrosion and scale inhibitor as well as the preparation method thereof, and belongs to the liquid separation technology field. The invention is used for improving the inhibition effectiveness of the scale inhibitor and reducing the cost. The invention has the technical proposal that the corrosion and scale inhibitor is composed of a basic constituent and additives, the basic constituent is prepared from materials by the weight units as follows: hydroxyethylidene diphosphonic acid of 4 to 5, sodium polyacrylate of 5 to 6, hydrolyzed polymaleic anhydride of 5 to 6, and polyepoxysulfosuccinic acid of 3 to 4. The invention is a non-phosphate, non-nitrogenous and green environmental protection upscale multi-element scale and corrosion inhibitor, which has excellent scale inhibition and dispersion performance aiming at calcium carbonate, calcium sulfate, barium sulfate, calcium fluoride and silica scale in water, the scale inhibition effect exceeds the common organic phosphine scale inhibitor, and the scale inhibition rate reaches 85 percent. The components of the invention have very good synergistic effect, the product performance is stable, the cost is low, and the price is one third lower than that of the similar product in the current market.

The invention provides a reverse osmosis compound scale inhibitor and belongs to the field of reverse osmosis water treatment. The scale inhibitor comprises the following components in percentage by weight: 10 to 20 percent of 1-hydroxyethylidene-1,1-diphosphonic acid, 30 to 40 percent of hydrolytic polymaleic anhydride, 30 to 40 percent of polyacrylic acid and 10 to 20 percent of sulfonated styrene-maleic anhydride copolymer, and the scale inhibitor comprises also comprises a bactericide. The reverse osmosis compound scale inhibitor fully utilizes the synergistic effect among organic phosphorous scale inhibitors, polycarboxylic acid scale inhibitors and sulfonic acid scale inhibitors, has good scale inhibition and dispersion performance; and when used in a reverse osmosis water inflow system, the scale inhibitor can effectively lighten pollution of calcium carbonate, calcium sulfate and silicate to reverse osmosis membranes and prolongs the cleaning period and service life of the reverse osmosis system.

The invention relates to the field of circulating water treatment and discloses compound corrosion and scale inhibitor and a preparation method and application thereof. The method comprises the steps of mixing water solution containing polyepoxysuccinic acid with inorganic acid solution, evenly stirring, standing, taking liquid supernatant after precipitation forms and complexing the liquid supernatant with one or more of hydrolytic polymaleic anhydride, organic phosphonic acid corrosion and scale inhibitor, sulfonic acid copolymer and zinc-contained compound. The preparation method disclosed by the invention can solve the problem that prepared compound corrosion and scale inhibitor generates turbidness and precipitation and can guarantee that the compound corrosion and scale inhibitor has an excellent corrosion and scale inhibition effect.

The invention discloses a non-phosphorus corrosion and scale inhibitor. The non-phosphorus corrosion and scale inhibitor is prepared from the following components in percentage by weight: 8 to 12 percent of hydrolytic polymaleic anhydride, 10 to 15 percent of polyepoxysuccinic acid, 15 to 20 percent of acrylic acid-2-acrylamido-2-methylpropanesulfonic acid multipolymer, 10 to 15 percent of carboxylic acid-sulfonic acid-acrylate terpolymer, 8 to 12 percent of acrylic acid-hydroxypropyl acrylate copolymer, 4 to 8 percent of zinc sulphate heptahydrate and the balance of deionized water. The invention further discloses a preparation method of the corrosion and scale inhibitor. The preparation method comprises the following steps: weighing the components according to the formula; adding the components into a stirrer in sequence; stirring at normal temperature and under normal pressure to obtain the corrosion and scale inhibitor. The corrosion and scale inhibitor disclosed by the invention has the advantages of freeness from phosphorus, adoption of safe and environment-friendly components, simple production process, high scale-inhibiting efficiency, high corrosion-inhibiting performance, prevention of eutrophication of a water body caused by discharge of phosphorus, and very high compatibility; the adhesion of microorganisms to equipment can be reduced effectively, and the corrosionand and scale inhibiting performance can be enhanced greatly.

Compositions comprising maleinized imide polymer and α,β-ethylenically unsaturated carboxylic, the polymer selected from the group consisting of butadiene homopolymer, butadiene copolymers, isoprene homopolymer, isoprene copolymers. and poly(maleic anhydride-co-alkenyl benzenes), are disclosed. Maleinized imide resin, optionally in solution and optionally comprising metallic salt of α,β-ethylenically unsaturated carboxylic acid, is used to treat fabric and thereby improve fabric to rubber adhesion. The resultant treated fabric and fabric-rubber composite are also disclosed.

The antiscale cleaning agent for boiler is divided into two kinds of dry powder and aqueous solution. Its dry powder components includes sodium carbonate, sodium humate, calgon and sodium phosphate, and its aqueous solution preparation composition includes sodium carbonate, sodium humate, calgon, sodium phosphate and water; polymaleic anhydride, sodium ethylenediamine tetramethylidene phosphate and water, its antiscale pH value is 8-10, and its cleaning pH value is 10-12. Said antiscale cleaning agent is applicable to various boilers.

The invention discloses a phosphorus-free multi-effective antifreeze solution, comprising the following components by mass percent: 35-90% of ethylene glycol, 0.05-1% of sodium molybdate, 0.4-2.5% of sodium nitrate, 0.3-0.9% of benzotriazole, 0.5-3.6% of sebacic acid, 0.25-3% of undecanedioic acid, 0.05-0.5% of hydrolyzed polymaleic anhydride, 0.001-0.005% of antifoaming agent and the balance deionized water. The invention has the advantages that a phosphate radical free formula system is adopted; in the formula, the sodium molybdate and the organic acid cooperate to protect the metal, and the sodium nitrate is used to assist to provide durable metal corrosion for a long-term; and a great amount of sebacic acid is used in the formula so as to take good addition effect on the corrosion of the metal.

The invention provides a composite water treatment agent which is used for industrial recycling cooling water treatment, has an excellent CaCO3 scale inhibiting function and good corrosion inhibiting ability, and is particularly applicable to high temperature conditions as well as a preparation method of the composite water treatment agent. The composite water treatment agent provided by the invention is mainly prepared from raw materials such as organic polybasic phosphonic acid, hydrolytic polymaleic anhydride or acrylic acid-maleic anhydride, an inorganic salt corrosion inhibitor and an organic salt corrosion inhibitor. Compared with the prior art, the composite water treatment agent provided by the invention is very high in chemical stability and heat stability, and the scale inhibiting effect under the high temperature condition is guaranteed. The product, namely the composite water treatment agent provided by the invention, aiming at an industrial water system which is high in content of scale-forming ions and higher in medium temperature, can effectively prevent generation of calcium carbonate scales, permit higher operating temperature and bear considerably high total salt content and content of scale-forming ions, and is safe in production and implementation processes, and raw materials are easily obtained.

The invention relates to a high-efficiency grey water dispersing agent which is a composition consisting of 40-60 percent of acrylic acid-2-polyscrylide-2-methyl acrylsulfonate, 15-35 percent of 2-phosphate-1,2,4-tricarboxylic acid butane, 5-25 percent of amino trimethylene phosphonic acid, 5-15 percent of hydroxyethylidene-1,1-diphosphonic acid and 5-15 percent of hydrolytic polymaleic anhydride. The dispersing agent is stable in property under the conditions of 40MPa and 250 DEG C, has a high dispersing capacity at the high temperature of 300 DEG C, has a good dispersing function on high-basicity, high-hardness, high-PH value and high ash content and high concentration multiple under the required high-concentration times in a water-coal-slurry pressurization and gasification device, can effectively delay the scale forming tendency and is applicable to a circulating cooling water system in industries such as power, metallurgy and papermaking. The addition in a water system is determined according to the water quality and working conditions, and the amount is 50-80mg / l according to the flow sum of a low-pressure grey water pump and a high-pressure grey water pump.

The invention discloses a vehicle engine fluid, relating to an engine fluid for a vehicle engine cooling system. The vehicle engine fluid is composed of glycol, sodium stannate, sebacic acid, adipic acid, benzotriazole, sodium benzoate, sodium salicylate, 1-carboxyl-2-hexyl-5-(7-carboxyl)-hexamethylene-3-alkene, hydrolyzed polymaleic anhydride, silane coupling agent KH-550, bis-imidazoline, dye, sodium hydroxide, deionzied water and the like. The vehicle engine fluid has the advantages of good corrosion effect, stable property, excellent corrosion inhibition property, no precipitate and no toxicity, and is not easy to volatilize, can be well absorbed on the surface of metal so as to form an absorption film, and can effectively inhibit corrosion of an antifreeze solution on soldering tin; and the selected additive is cheap and available and has good economic benefits and social benefits, and the like. The vehicle engine fluid can be widely applied to a cooling system of a vehicle engine, especially is used as a vehicle antifreeze solution in a low-temperature region.

The invention belongs to the technical field of industrial water treatment, and particularly relates to an environmental protection type composite dirt dispersion agent used for oil field water flooding treatment. The dirt dispersion agent takes polyasparagic acid, polyepoxy sodium succinate and hydrolyzed polymaleic anhydride as effective components; and the total content of the effective components is no less than 35 percent. The weight ratio of the effective components of polyasparagic acid: polyepoxy sodium succinate: hydrolyzed polymaleic anhydride is 4-12.5:1-5: 5-9. The environmental protection type composite dirt dispersion agent is phosphorus free, innocuous and biologically degradable, and has low use cost. The environmental protection type composite dirt dispersion agent can effectively prevent the sedimentation of calcium carbonate, calcium sulphate and barium sulphate, and is suitable for the dirt dispersion treatment in an oil field water flooding system.

The invention discloses a thermal test solution for an engine, which consists of the following components in weight percent: 70-80 percent of ethylene glycol, 0.1-5.0 percent of aliphatic monocarbocylic, 1.0-5.0 percent of straight-chain aliphatic dicarboxylic acid, 0.1-1.0 percent of triazine skeleton tricarboxylic acid, 0.1-4.5 percent of aromatic acid, 0.1-1.0 percent of composite inhibitor, 0.1-0.5 percent of hydrolytic polymaleic anhydride, 0.2-4.0 percent of alkenyl amines, 0.2-2.0 percent of cyclohexylamine carbonate, 0.001-0.2 percent of antifoaming agent and the balance of deionized water. The invention can inhibit and prevent the corrosion during the thermal test process of the engine, has a unique gaseous phase corrosion inhibition technology, can be used for preventing the corrosion generated by potential corrosion which is formed by the contacting of the residual liquid and the air during the placing process after the thermal test of the engine, and has both a fully organic acid type engine coolant corrosion inhibition technology and a gaseous phase corrosion inhibition technology as well as good stability.

The invention discloses a low surface energy liquid control release type marine anti-fouling paint, comprising the following components in parts by weight: 30.0-55.0 parts of film-forming resin, 7.0-18.0 parts of lamella cross-linking silicone oil microcapsule, 1.0-10.0 parts of plasticizer, 1.0-3.0 parts of defoaming agent, 15.0-35.0 parts of added pigment and 5.3-22.7 parts of solvent. The lamella cross-linking silicone oil microcapsule is obtained by polymerizing an oil-in-water system in situ; the core material of the lamella cross-linking silicone oil microcapsule is one or several of methyl silicone oil, hydroxy silicone oil, amino silicon oil and alkoxy silicone oil; and the wall material of the lamella cross-linking silicone oil microcapsule can be one of polyacrylamide, polyacrylic acid, polymaleic anhydride and the like which can be swelled in the water. The anti-fouling paint has the advantages of remarkable anti-fouling effects, no pollution to a marine environment, low cost and applicability for industrial application production. The film-forming resin is acrylic resin, the structural general formula of which is shown in the specification of the invention.

A method for inhibiting chloride ion corrosion in recirculated cooling water comprises, charging sulphate 0.5-1.8 times of chlorine ion concentration into the circulating water containing chlorine ions so as to inactivate the stainless steel surface, controlling scaling through the charge of anti-scaling dispersing agent, said sulphate being one of or mixture of two or more of sodium sulfate, potassium sulfate and magnesium sulfate, and said dispersing agent being binary copolymer of polycyclic acid or salt with polymaleic anhydride, or binary copolymer of acrylic acid and acrylic ester, acrylic acid and AMPS, or terpolymer of acroleic acid with AMPS and maleic anhydride.

At present, most scale inhibitor of fresh water contains phosphorus so as to be not environment-friendly, and when the existing non-phosphorus scale inhibitor of the fresh water is applied to seawater, the scale inhibition efficiency is low since the water quality of the seawater is more different from that of the fresh water. The invention discloses a scale inhibitor specially used for a seawater circulating cooling water system, which is characterized by comprising the components by weight percent: 20-40% of polyacrylic acid (PAA), 20-35% of acrylate copolymer, 10-30% of hydrolytic polymaleic anhydride, 10-20% of polyaspartic acid and 5-15% of surface active agent. The invention uses monomers to form non-phosphorus component which is the non-phosphorus scale inhibitor and is in accordance with the environmental protection requirements; and the invention has the characteristic of high efficiency in scale inhibition, and leads the fresh water to be replaced by the seawater which is taken as industrial circulating cooling water and is popularized and applied.