The solid slow-release anti-corrosion and anti-scaling agent (body) is installed at the lower end of the oil well pump. When the produced liquid flows through, it can be dissolved slowly, and at the same time, the effective components of anti-corrosion and anti-scaling are released bit by bit to achieve the purpose of anti-corrosion and anti-scaling. In addition, the scale layer can be prevented from blocking the oil well pump, and the inspection cycle of the pump can be prolonged. In this paper, various reasons for scaling of oil well produced fluid (i.e. oilfield sewage) are analyzed. It is considered that calcium, magnesium ions and silicate ions are easy to form scale by adsorption, crystallization and precipitation at high PH value. Proper temperature and slow flow rate can accelerate scaling. The mechanism of scale and corrosion inhibition of common inorganic compounds and organic compounds is analyzed and studied theoretically. The best formula of solid corrosion and scale inhibitor was determined through experiments. In which soluble solids ..........................................................................................................................................................................

2. Preparation of Green Scale Inhibitor

The preparation of PASP was studied, the influencing factors of various reactions were discussed, and the synthetic products were characterized. The static and dynamic scale inhibition performance of PASP is further studied in detail, and the scale inhibition mechanism and influencing factors of PASP are discussed. The main research work is as follows: 1. Maleic acid (maleic acid) and ammonia water (mass fraction: 25%) were used as raw materials, and polysuccinimide was obtained by condensation at a certain temperature, and then hydrolyzed into the sodium salt of PASP under the action of sodium hydroxide aqueous solution. The use of gaseous ammonia is avoided and the synthesis process is optimized. The synthesis conditions and hydrolysis conditions were studied by single factor. The optimum synthesis conditions were obtained by orthogonal test: the molar ratio of maleic acid to ammonia = 1: 1.3 (mol), drying temperature 180℃, drying time 1.5h, and dehydration cyclization temperature * *.

3. Synthesis of a new water stabilizer AADMP and its scale and corrosion inhibition performance.

According to the theory of molecular structure optimization, a new kind of macromolecular organophosphorus carboxylic acid reagent-2-amino adipic acid -N, N- dimethyl phosphonic acid (AADMP) was designed and synthesized. It combines the characteristics of corrosion and scale inhibitors of macromolecular organic phosphonic acid and phosphonocarboxylic acid, and maintains the molecular structural characteristics of macromolecular organic phosphonic acid and phosphonocarboxylic acid. At the same time, compared with low molecular organic phosphonic acid, the phosphorus content is greatly reduced, the structure of amino acid groups in the molecule is increased, and the biodegradability is improved. It can replace the currently used low molecular organic phosphonic acid agents, solve the environmental problems caused by high phosphorus content and difficult biodegradation of the current organic phosphonic acid water treatment agent, and is more in line with environmental protection requirements. Under certain conditions, a new type of organic phosphonic acid-2- amino adipic acid -n, n- dimethyl phosphonic acid scale and corrosion inhibitor was synthesized from 2-amino adipic acid, formaldehyde and phosphorous acid. The physical and chemical properties of the synthetic reagent were analyzed, and methanol was selected as the synthetic reagent. ...............................................................................................................................................................

4. Efficient scale inhibitor in boiler water treatment

The scale inhibition rates of inorganic scale inhibitor sodium carbonate (na2co 3), organic scale inhibitor disodium ethylenediamine tetraacetate (EDTA-Na2) and amino trimethyl phosphonic acid (ATMP) were determined experimentally when the total hardness was 7mmol/L and the alkalinity was 3,4,5,6 mmol/L respectively. The scale inhibition effects of organic chemicals 1 2- ethylene diphosphonic acid (HEDP), hydrolyzed polymaleic anhydride (HPMA) and sodium polyacrylate (PAAS) were compared. The results showed that the scale inhibition effects of organic scale inhibitors were far better than those of inorganic scale inhibitors. Among the organic scale inhibitors, ATMP has a good scale inhibition effect. On this basis, ATMP was selected as the main organic reagent of the compound formula. Through the compound experiment of multi-component chemicals, an efficient compound scale inhibitor formula suitable for boiler water supply in Tianjin is put forward: ATMP/na2co = 20.3/ 100. At the same time, 69 pages of the film were studied by static experiment.

5. Study on new efficient corrosion and scale inhibitor for copper.

At present, most of the cooling water treatment agents containing phosphine in China pollute the environment, copper corrosion inhibitors need special prefilming agent for prefilming treatment, and the corrosion inhibition performance of most copper corrosion inhibitors decreases in the cooling water system with chlorine oxide as biocide. A new efficient copper corrosion and scale inhibitor CH was developed. Through a large number of experiments, the formula composition was optimized. The corrosion behavior of brass in deionized water, tap water and chlorine-containing deionized water, the influence of common ions on its corrosion inhibition performance and the scale inhibition performance of CH were studied by hanging weight loss method, linear polarization method, polarization curve method, AC impedance method, SEM, XPS and static scale inhibition method. The corrosion inhibition performance, corrosion inhibition mechanism, scale inhibition performance and scale inhibition mechanism of CH were discussed. It is found that the corrosion and scale inhibitor for CH is being treated ... * * * Page 72.

6. Development of corrosion and scale inhibitor for circulating cooling water system

After the cooling water passes through the heat exchanger, open cooling tower and pipes with different lengths, it will undergo a series of changes, such as temperature change, evaporation concentration and rich oxidation, which will cause corrosion and scaling of equipment, greatly reduce the heat transfer effect and seriously consume equipment. In order to save water and energy and prolong the service life of equipment, two major problems of corrosion and scaling of circulating cooling water system must be solved. Adding corrosion and scale inhibitors is the most commonly used solution, but the corrosion and scale inhibitors currently used are expensive and difficult to meet the increasingly stringent environmental protection requirements. 2- Hydroxyphenylacetic acid (HPAA) is a kind of low phosphine organic phosphoric acid carboxylic acid water stabilizer, which has good corrosion and scale inhibition performance. On the basis of previous studies, the synthesis method of HPAA was improved, and the molecular structure of HPAA was improved according to the relevant corrosion inhibition theory. The corrosion inhibition performance, scale inhibition performance and stability of HPAA were tested according to the national industry standard method, and the page number was ***50.

7. Development of high temperature resistant solid corrosion and scale inhibitor

In the process of oil field development, adding liquid corrosion and scale inhibitor to oil and gas wells is a common anti-corrosion and scale inhibition measure, but there are the following problems: ① gas lift wells have large liquid production and large flow rate, and the added liquid agent is easy to be taken out quickly, and the effective protection period of the agent is short; (2) It is difficult for the liquid medicine added from the tubing annulus to reach the well section below the working valve, and 30%-50% of the tubing string cannot be protected; (3) The ground equipment and facilities such as high-pressure liquid injection pumps, containers and pump trucks need to add liquid medicine, which is difficult to manage; (4) The liquid medicine is easy to adhere to the tubing wall, causing unnecessary losses. This paper discusses the development process of a solid corrosion and scale inhibitor with environmental protection polyaspartic acid as the main component and imidazolinium amide corrosion inhibitor as the main component. The solubility, dispersibility, high temperature resistance, corrosion inhibition efficiency and scale inhibition efficiency of the solid corrosion and scale inhibitor in water were studied, and its adsorption and desorption behavior on metal surface was studied from the electrochemical point of view. .................. * * 76 pages.

8. Study on new corrosion and scale inhibitors

A method of one-step synthesis of low-phosphorus organic polyphosphoric acid-based polymer corrosion and scale inhibitor was designed with water as solvent, maleic anhydride, acrylic acid and sodium hypophosphite as raw materials and hydrogen peroxide as initiator and catalyst. The optimum technological conditions and suitable raw material ratio were designed. The corrosion and scale inhibition performance of the product was tested. The total phosphorus content (p04 ~(3-)≤5%) was determined. This is a high molecular polymer with phosphonyl and carboxyl groups in its molecular structure. The coexistence of various functional groups makes this kind of substance have the characteristics of scale inhibition, dispersion and corrosion inhibition of organic polyphosphonic acid polymer and carboxylic acid polymer, and at the same time, it has the advantages of stable structure (containing C-P bond), low phosphorus content (P0 _ 4 ~ (3-) ≤ 5%), low toxicity, no pollution to the environment and good compatibility with other drugs, so it is very suitable.

9. Synthesis of new polymer scale inhibitor

As an interdisciplinary comprehensive technology, water treatment technology will play a unique and important role. Using water quality stabilization technology for cooling water is the only way to save water and energy. According to the characteristics of acrylic polymer scale inhibitor, an amphoteric ternary system of acrylic acid (AA)- acrylamide (AM)- dimethyl diallyl ammonium chloride (DMDAAC) was synthesized by using redox initiator composed of ammonium persulfate ((NH4)2s2o 8) and sodium hypophosphite (na2po 3) and water as solvent. The test shows that the product not only has a high scale inhibition effect, but also has a certain bactericidal effect, basically achieving multiple effects with one dose. A series of amphoteric polymer scale inhibitors were produced by free radical aqueous solution polymerization. ..............................................................................................................................

10, Study on Corrosion and Scale Inhibitor of Circulating Water System

In order to clarify the research focus, the operation status of 8 circulating water fields and the replacement of cold exchange equipment in Daqing Oilfield Natural Gas Company were investigated. The water quality of supplementary water source in circulating water field is analyzed. From the electrochemical point of view and the ionic concentration product and complexation theory of insoluble salts in inorganic chemistry, the scaling and corrosion mechanisms, corrosion and scale inhibition mechanisms of circulating water are briefly and systematically discussed. Then, the research will focus on the development of corrosion and scale inhibitors for circulating water exchange. At different temperatures and concentrations, the single chemicals PBT CA(2- phosphonombutane-1, 2,4 tricarboxylic acid), HPAA(2- hydroxyphosphonoacetic acid), HL- 1 (ternary * * * polymer) and HL-2 (ternary * * * polymer) were systematically evaluated.

Synthesis and scale inhibition performance of green scale inhibitor polyepoxysuccinic acid

Polyepoxysuccinic acid (PESA) was synthesized from maleic anhydride by epoxidation and ring-opening polymerization. The whole synthesis process is divided into two steps: the synthesis of epoxy succinic acid (ESA) and the synthesis of polyepoxysuccinic acid. In the first step, the content of unreacted maleic acid and by-product tartaric acid in the product was determined by ultraviolet-visible spectrophotometry, and the yield of epoxysuccinic acid was indirectly obtained. The effects of various process parameters on the yield of epoxysuccinic acid were studied systematically by designing, and the best synthesis process of epoxysuccinic acid was obtained. On this basis, PESA was obtained by adding initiator to polymerize ESA, and systematic experiments were carried out. Taking the final scale inhibition rate of the product as the investigation goal, the relationship between the influencing factors and the scale inhibition performance of the product was studied, and finally a better synthesis process of polyepoxysuccinic acid was obtained. ............. * * * page 70 epoxy succinate was characterized by infrared spectrum.

12, Study on Mechanism of Organic Scale and Corrosion Inhibitor

Using quantum chemistry and molecular dynamics methods, the mechanism of scale and corrosion inhibitors commonly used in circulating cooling water was studied, which was divided into two parts. In the first part, based on the experimental results and theoretical model, the scale inhibition mechanism of carboxylic acid homopolymerization and polymer, polyamine polyether methylene phosphonic acid and organic phosphonic acid were systematically studied by quantum chemistry and molecular dynamics methods. In the second part, the corrosion inhibition mechanism of pyridine and its derivatives on aluminum, BTA and its carboxyl alkyl ester derivatives on copper, imidazole and imidazoline derivatives on iron was studied. The interaction between polycarboxylate scale and dispersant and calcite, anhydrite and hydroxyapatite crystals was dynamically simulated by molecular dynamics method. It is found that the inhibition ability of six kinds of polycarboxylic acids on calcite scale is AA-MA > HPMA > AA-HPA > PAA > AA-Mae > PMAA ... * *175 page 13, which is a composite corrosion and scale inhibitor for treating circulating cooling water.

14, composite corrosion inhibitor for high temperature and high density test solution

15, a composite corrosion and scale inhibitor for treating medium and high hardness circulating water.

Composite Corrosion and Scale Inhibitor 16 for Treating Low Hardness Circulating Water

17 oilfield water injection corrosion inhibitor

18 copper corrosion inhibitor and its production method

19, corrosion inhibitor for internal combustion engine coolant

20. Method for preparing corrosion inhibitor from natural polymer

2 1, iron ion corrosion inhibitor

22. A bactericidal corrosion inhibitor

23. A phosphorus-free corrosion inhibitor and its preparation method.

24. A corrosion inhibitor composition for circulating cooling water.

25. A corrosion inhibitor composition for deionized water.

26, composite scale and corrosion inhibitor

27. A composite scale and corrosion inhibitor suitable for recycling ammonia-containing sewage into circulating cooling water.

28. A steel corrosion inhibitor for high-temperature acidic medium and its preparation method.

29, black corrosion and scale inhibitor

30, environmental protection scale inhibitor polyepoxysuccinic acid and its preparation method

3 1, preparation method of environment-friendly scale inhibitor polyaspartic acid

32. A corrosion and scale inhibitor for water treatment and its preparation method

33. Special corrosion and scale inhibitor for surface evaporation and air cooling

34. Used as corrosion inhibitor instead of mercury in zinc-manganese dry battery.

35. A method for preparing acidic corrosion inhibitors by modifying nitrogen heterocyclic compounds with natural plant rubber powder.

36. A new corrosion inhibitor for inhibiting steel corrosion in 10%-25% salt solution.

37. Corrosion inhibitor in hydrochloric acid -H2S-H2O corrosion system.

38. An environment-friendly HSn70- 1 brass corrosion inhibitor.

39. A corrosion inhibitor resistant to the combined action of H2S and CO2.

40. A water-soluble corrosion inhibitor for inhibiting CO2 corrosion of carbon steel and its preparation method.

A new CO2 corrosion inhibitor 4 1 for oil field.

42. A composite scale and corrosion inhibitor and its application in recycling ammonia nitrogen-containing sewage into circulating cooling water.

43. A metal corrosion inhibitor

44. A deoxidizing scale inhibitor and its production method.

45. A corrosion inhibitor for complex iron desulfurization solution.

46, itaconic acid poly * * * efficient scale inhibitor and its preparation method

47, mercaptoheterocyclic compounds and alkali metal iodide composite corrosion inhibitor

48, amphoteric bactericidal corrosion inhibitor

49, water system corrosion inhibitor

50, gas phase corrosion inhibitor and its preparation method

Green scale and corrosion inhibitor 5 1

52. A composite scale and corrosion inhibitor and its application.

53. A composite scale and corrosion inhibitor and its application.

54. A corrosion inhibitor composition, its preparation and application.

55, multifunctional corrosion inhibitor and its preparation method

56, solid corrosion inhibitor and its preparation method

57, barium strontium scale inhibitor

58. Preparation method and use of a corrosion inhibitor.

59. A corrosion inhibitor for high-temperature equipment in an oil refining unit.

60, long-acting phosphorus-free circulating cooling water corrosion inhibitor

6 1, downhole solid paraffin and scale inhibitor

62. A vapor phase corrosion inhibitor for industrial equipment protection and its preparation method.

63. Efficient corrosion inhibitors of organic or inorganic salts and compound salt snow melting agents.

64. Efficient corrosion inhibitors of organic or inorganic salts and compound salt snow melting agents.

65. Nano-modified kaolin boiler scale inhibitor and its preparation method

66. Electro-Fenton oxidation method of scale inhibitor in reverse osmosis concentrated solution

67. A preparation method of battery anode corrosion inhibitor.

68. A composite scale and corrosion inhibitor containing polyepoxysuccinic acid and its application.

69. A composite corrosion and scale inhibitor and its application in circulating cooling water treatment.

70. A phosphorus-free composite scale and corrosion inhibitor for treating circulating cooling water.

7 1, composite phosphorus-free corrosion inhibitor for water treatment and preparation method thereof

72. Scale inhibitor for ash flushing water pipeline

73, industrial boiler steam condensation system corrosion inhibitor and its manufacturing method

74, an evaluation method of scale inhibitor in petrochemical process.

75, polyaniline oil well corrosion inhibitor

76, zinc material special gas phase corrosion inhibitor

77. Preparation method of biodegradable corrosion and scale inhibitor polyaspartic acid

78, biodegradable corrosion and scale inhibitor amino polyepoxysuccinic acid preparation method

79. Preparation method of morpholine derivative gas phase corrosion inhibitor

80, hydrogen sulfide corrosion inhibitor

8 1, preparation method of scale inhibitor

82, continuous casting soft water, steelmaking soft water system with corrosion and scale inhibitor

83. Acid corrosion inhibitors

84, efficient corrosion and scale inhibitor

85, a corrosion and scale inhibitor

86, a stable corrosion and scale inhibitor

87. A corrosion inhibitor and its manufacturing method.

88. A metal corrosion inhibitor containing a biologically converted dibasic acid product.

89. An oil well acidizing corrosion inhibitor and its preparation method.

90. An acidic corrosion inhibitor and its preparation method.

9 1 acid inhibitor and preparation method thereof

92. A natural green pickling inhibitor and its application.

93, efficient pickling inhibitor

94, high temperature and high pressure corrosion inhibitor and production method

95. A scale inhibitor for cracking gas compressor of ethylene plant and its application method.

96. Special gas phase corrosion inhibitor for environmental protection silicon steel.

97, low phosphine composite corrosion and scale inhibitor

98. A corrosion inhibitor for circulating water system of air conditioner and its application method.

99. A corrosion and scale inhibitor for air conditioning system and its application method.

100, corrosion inhibitor for industrial cooling circulating water system

10 1, corrosion and scale inhibitor for industrial cooling water system.

102, an acid boiler corrosion inhibitor

103, corrosion inhibitor for hydrogenation unit

104 low phosphorus scale and corrosion inhibitor and its application

Low phosphorus composite scale and corrosion inhibitor 105 and its application in water treatment

106, diatomite water purifier

107, preparation method of urea amine derivative gas phase corrosion inhibitor

108, copper corrosion inhibitor

109, a composite scale and corrosion inhibitor for circulating cooling water treatment.

Phosphorus-free composite scale and corrosion inhibitor 1 10 and its application in water treatment

1 1 1. Composite scale inhibitor for reverse osmosis system and its application.

1 12. Use of phosphate ester containing alkoxy group as corrosion inhibitor for reinforced concrete

1 13, alkoxy-containing ester containing phosphorus oxyacid and its use as corrosion inhibitor and flame retardant.

1 14, polymer composition-corrosion inhibitor

1 15 Corrosion inhibitor for controlling carbon dioxide corrosion and preparation method thereof

1 16, a corrosion inhibitor for controlling galvanic corrosion.

1 17, scale inhibitor for phosphorus-free water

1 18, scale and corrosion inhibitor for hydrogenation unit

1 19, antioxidant corrosion and scale inhibitor for boilers

120, multifunctional scale inhibitor for boiler water treatment

12 1, copper-zinc alloy corrosion inhibitor for water treatment

122, copper-nickel alloy corrosion inhibitor for water treatment

123, determination method of corrosion inhibitor concentration

124, boiler scale inhibitor and its application method

125, scale inhibitor for refinery equipment

126, preparation method of copper-nickel alloy composite corrosion inhibitor in seawater

Novel high-temperature acidification corrosion inhibitor 127 and preparation method thereof

128, application of phosphorus-containing organic waste liquid in scale and corrosion inhibitor

129, sulfur-based corrosion inhibitor

130, a ternary synergistic corrosion inhibitor

13 1, a composite green corrosion inhibitor for inhibiting the corrosion of carbon steel in seawater.

132, a green corrosion inhibitor for inhibiting the corrosion of carbon steel in seawater.

133, formula, preparation method and application method of solid corrosion inhibitor

134, a method for evaluating the performance of scale inhibitors.

135, corrosion inhibitor system for semiconductor wafer cleaning

136, high temperature corrosion inhibitor

137, bactericidal corrosion inhibitor for circulating cooling water treatment.

138, molybdenum phosphine composite corrosion and scale inhibitor and its preparation method

139 slow-release scale inhibitor and its production and use method

140—— A composite corrosion inhibitor for inhibiting the corrosion of carbon steel in methanol solution and its application

14 1, scale inhibitor for wet-process phosphoric acid production

142, polyamine corrosion inhibitor

Efficient multifunctional reverse osmosis membrane scale inhibitor 143 and preparation method thereof

144, biodegradable composite corrosion and scale inhibitor and its preparation method

Scale inhibitor for reverse osmosis membrane 145

146, a rapid automatic evaluation device for scale inhibitor performance based on conductivity detection.

147 high-temperature corrosion inhibitor, preparation method and application thereof

148, film-forming corrosion inhibitor and its preparation method

149 ferrous metal vapor phase corrosion inhibitor and its preparation method

150, pickling corrosion inhibitor and its production method

15 1, corrosion inhibitor continuous filling device

152, a corrosion and scale inhibitor suitable for high chlorine and high calcium water.

153, an environment-friendly composite corrosion and scale inhibitor for circulating cooling water treatment.

154 composite scale and corrosion inhibitor and its application

155, a corrosion and scale inhibitor for inhibiting carbon steel corrosion.

156 carbon steel corrosion inhibitor and its application

157, chelating mercury-free nonmetallic corrosion inhibitor with high efficiency.

158, corrosion inhibitor for metal pickling and its preparation method

Green and efficient pickling inhibitor 159 and its application

160, corrosion inhibitor for inhibiting metal corrosion and preparation method thereof

16 1.

162, a low-phosphorus environment-friendly composite corrosion and scale inhibitor for treating circulating cooling water and its application method.

163, preparation method of gas phase corrosion inhibitor

164, long-term environmental protection corrosion inhibitor for closed circulating cooling water

165, an environment-friendly composite corrosion and scale inhibitor.

166, reverse osmosis membrane scale inhibitor and its preparation method

167 lithium bromide absorption refrigerator corrosion inhibitor and preparation method thereof

168, corrosion inhibitor for cooling water system of nuclear power plant

169, barium strontium scale inhibitor

170, allyloxy polyether scale inhibitor and its preparation method

17 1, amino acid-based acid gas absorbent composite corrosion inhibitor.

172 phosphorus-free environment-friendly corrosion and scale inhibitor and preparation method thereof

173 fluorescent polyether scale inhibitor and preparation method thereof

174, dynamic test method of reverse osmosis scale inhibitor performance

175, the flow direction switching method for preventing reverse osmosis membrane from scaling in the presence of scale inhibitor.

176, a scale and corrosion inhibitor for low phosphorus stainless steel tube condenser.

177, preparation method of efficient maleic anhydride polymer scale inhibitor

Phosphorus-free corrosion and scale inhibitor 178 and its application

179. Measuring device for evaluating scale inhibitor performance based on light transmittance method.

180, high temperature corrosion inhibitor for acidizing and fracturing

18 1, an oil well paraffin removal corrosion and scale inhibitor.

182, preparation method of carboxymethyl larch tannin biodegradable scale inhibitor

183 pickling corrosion inhibitor and preparation method thereof

184, a film-forming corrosion inhibitor for hydrofining unit.

185, a composite corrosion and scale inhibitor for treating high concentration circulating water.

186, evaluation method of scale inhibition performance of reverse osmosis scale inhibitor

187, corrosion and scale inhibitor for reverse osmosis membrane and its preparation method

188, special corrosion and scale inhibitor for ethylene compression system

189 phosphorus-free corrosion and scale inhibitor and its synthesis method

190, a method for purifying sewage by combining ozone and diatomite.

19 1, corrosion and scale inhibitor epoxysuccinic acid p-epoxyethyl benzene sulfonic acid polymer and its preparation method

192, a composite silica scale inhibitor, is used to prevent the deposition of silica scale in industrial water treatment system.

193, an environment-friendly composite scale inhibitor for preparing silicon scale deposits in water.

194 scale inhibitor for hydrogenation unit, preparation method and application thereof

195, corrosion and scale inhibitor for industrial circulating cooling water

196, quaternary polymeric corrosion and scale inhibitor and its preparation method

197, fluorescently labeled polyether carboxylic acid scale inhibitor and its preparation method

Special corrosion and scale inhibitor for TRT 198

199, reverse osmosis membrane scale inhibitor and its preparation method

200, wet dust removal of blast furnace gas energy recovery turbine device special scale inhibitor.

20 1. Complexes of morpholine derivatives and ketoacids as corrosion inhibitors

202. A corrosion inhibitor for frozen liquid.

203, copper corrosion inhibitor and its use method

204, phosphorus ternary * * * polymer scale inhibitor.

205. A corrosion inhibitor to replace mercury in alkaline zinc series batteries.

206, grey water scale inhibitor

207, hot water boiler corrosion and scale inhibitor and its usage.

208, used in soft water closed-loop cooling system of silicon corrosion inhibitor.

209, an oil well acidification corrosion inhibitor and its preparation method.

2 10, a composite corrosion and scale inhibitor for treating circulating cooling water.

2 1 1, instant composite corrosion inhibitor and composite production process

2 12, organic scale and corrosion inhibitor for low-pressure boiler and its preparation method

2 13, rapid decomposition method and device of phosphine scale inhibitor

2 14, high-pressure boiler gas phase corrosion inhibitor and preparation method

2 15, aminosilane salt of carboxylic acid and silanamide corrosion inhibitor

2 16, chromium-free corrosion inhibitor for aluminum alloy

2 17, silicate coating corrosion and scale inhibitor

2 18, corrosion inhibitor for copper pickling at room temperature

2 19, a composite corrosion and scale inhibitor for highly corrosive water.

220, a scale inhibitor for automobile cooling system.

22 1, a new corrosion inhibitor for inhibiting steel corrosion in brine.

222, a new corrosion inhibitor for inhibiting steel corrosion in seawater.

223, a new corrosion inhibitor for inhibiting steel corrosion in tap water.

224, boiler corrosion and scale inhibitor

225, sugar special corrosion inhibitor and use method

226, multicomponent composite scale and corrosion inhibitor

227, a low phosphorus polymer dispersion scale and corrosion inhibitor and its preparation method.

228, hydrochloric acid pickling fog inhibitor and production method

229. A composite corrosion and scale inhibitor for softening the quality of circulating water.

230. A combination of corrosion inhibitors and synergistic inhibitors is used to protect light metals in heat transfer fluids and engine coolants.