Environment-friendly composite corrosion and scale inhibitor, preparation method and application thereof

Abstract

The present application relates to the technical field of corrosion and scale inhibitors, and particularly relates to an environment-friendly composite corrosion and scale inhibitor, a preparation method and application thereof.The environment-friendly composite corrosion and scale inhibitor provided by the present application comprises the following components in percentage by weight: corrosion inhibitor 12-35%, scale inhibitor 3-10%, antioxidant 0.5-5%, and water in remainder.The corrosion inhibitor comprises organic acid compound, isoquinoline compound and glycoside compound; and the scale inhibitor comprises polyaspartic acid.The environment-friendly composite corrosion and scale inhibitor can be applied to the manufacture of cooling liquid for energy storage equipment.The environment-friendly composite corrosion and scale inhibitor provided by the present application has excellent metal corrosion protection function, scale inhibition performance and environmental protection performance, and can effectively prevent metal corrosion and flow passage blockage, and ensure the normal operation of the temperature control system of the energy storage equipment.

Description

Technical Field

[0001] This invention belongs to the technical field of corrosion and scale inhibitors, specifically relating to an environmentally friendly composite corrosion and scale inhibitor, its preparation method, and its application. Background Technology

[0002] Against the backdrop of dual carbon emissions, the new energy power industry, including wind power and photovoltaics, has flourished globally in recent years. Energy storage devices, as a crucial component of this new power system, can address the fluctuations and grid connection issues of wind and photovoltaic power generation, thus possessing enormous market potential. Currently, the global energy storage market is experiencing rapid growth, and energy storage technology is also rapidly upgrading. With the continuous expansion of energy storage project construction, the capacity of individual battery cells and the energy density of the system need to be continuously improved. This places higher demands on the temperature control level of energy storage devices. Therefore, liquid cooling, with its high thermal conductivity and low energy consumption, is gradually becoming the mainstream temperature control method.

[0003] The cooling system of an indirect liquid-cooled energy storage device consists of water pumps, liquid cooling plates, valves, water tanks, sensors, pipelines, and connectors. The materials used include aluminum alloys, steel, copper, and various non-metallic materials. The diverse range of metallic materials and complex flow channels place high demands on the corrosion protection and scale inhibition capabilities of the coolant. Furthermore, as a component of the power system, energy storage devices are often located in remote and inaccessible areas, operating unattended, making system maintenance difficult. This places even higher demands on the stability of the coolant's corrosion and scale inhibitors. Simultaneously, the lack of wastewater treatment facilities at the equipment locations also necessitates high environmental performance requirements for the coolant's corrosion and scale inhibitors.

[0004] However, there is currently a lack of composite corrosion and scale inhibitors specifically designed for energy storage equipment on the market, and equipment manufacturers mostly use automotive coolant as a substitute. Using automotive coolant in the temperature control system of energy storage equipment poses risks of metal corrosion and poor scale inhibition performance, as well as the inability to meet the maintenance-free requirements in terms of stability. It also lacks environmental performance, resulting in the discharge of liquid causing certain harm to the surrounding environment. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides an environmentally friendly composite corrosion and scale inhibitor, its preparation method, and its application.

[0006] In a first aspect, the environmentally friendly composite corrosion and scale inhibitor provided by the present invention comprises the following components in weight percentage:

[0007]

[0008] The corrosion inhibitor includes organic acid compounds, isoquinoline compounds, and glycoside compounds; the scale inhibitor includes polyaspartic acid.

[0009] In this invention, the environmentally friendly composite corrosion and scale inhibitor uses a certain amount of organic acid compounds, isoquinoline compounds, glycoside compounds, corrosion inhibitors, scale inhibitors, and antioxidants. It is environmentally friendly and has excellent corrosion and scale inhibition effects. It can be mixed with various base liquids such as ethylene glycol, propylene glycol, and water. This environmentally friendly composite corrosion and scale inhibitor has excellent metal corrosion protection performance, scale inhibition performance, and environmental protection performance. It can effectively prevent metal corrosion and flow channel blockage, and ensure the normal operation of the temperature control system of energy storage equipment. In particular, it can be used to manufacture coolant for energy storage equipment, and can better meet the cooling and temperature control requirements of energy storage equipment.

[0010] Preferably, the environmentally friendly composite corrosion and scale inhibitor is composed of the following components in weight percentage:

[0011]

[0012] In this invention, by optimizing the dosage of corrosion inhibitor, scale inhibitor, and antioxidant in the composite corrosion and scale inhibitor, the combination of organic acid compounds, isoquinoline compounds, and glycoside compounds can exert a better metal corrosion inhibition effect.

[0013] Preferably, the corrosion inhibitor is a composition of organic acid compounds, isoquinoline compounds and glycoside compounds in a weight ratio of 1:(1.2-0.5):(0.4-0.05).

[0014] In the composite corrosion and scale inhibitor formulation system of this invention, the organic acid compound, isoquinoline compound, and glycoside compound, in a specific ratio, exhibit a good synergistic effect, especially demonstrating excellent corrosion inhibition performance for various metals in electrochemical systems where multiple metals coexist. Further research in this invention has revealed that optimizing the types and amounts of corrosion inhibitors and scale inhibitors can better leverage the synergistic effect between the components, significantly improving the scale inhibition and corrosion inhibition performance of this composite corrosion and scale inhibitor.

[0015] Preferably, in the above-mentioned composite corrosion and scale inhibitor, the organic acid compound is selected from one or more of chlorogenic acid, quinic acid, sebacic acid and malic acid, with chlorogenic acid being the most preferred.

[0016] Preferably, in the above-mentioned composite corrosion and scale inhibitor, the isoquinoline compound is selected from one or more of 1-aminoisoquinoline, 6-methoxyisoquinoline, 6-hydroxy-1,2,3,4-tetrahydroisoquinoline and isoquinoline, with 1-aminoisoquinoline being the most preferred.

[0017] Preferably, in the above-mentioned composite corrosion and scale inhibitor, the glycoside compound is selected from one or more of salicin, arbutin, mangiferin and tansylation, with salicin being the most preferred.

[0018] Preferably, the antioxidant is ε-polylysine and / or γ-polyglutamic acid, with ε-polylysine being more preferred. The use of ε-polylysine or γ-polyglutamic acid as an antioxidant in this invention can further enhance the effects of each component of the composite corrosion and scale inhibitor, improve the stability of the manufactured coolant, slow down the generation of impurities in the components of the composite corrosion and scale inhibitor and the base liquid due to oxidation, extend the service life of the coolant, and improve the storage stability of the composite corrosion and scale inhibitor of this invention.

[0019] Further preferred, the environmentally friendly composite corrosion and scale inhibitor is composed of the following components in weight percentage: chlorogenic acid 15-17%, 1-aminoisoquinoline 13-15%, salicin 4-6%, polyaspartic acid 7-9%, ε-polylysine 4-6%, and the balance being deionized water. This environmentally friendly composite corrosion and scale inhibitor exhibits the best overall performance.

[0020] Secondly, the present invention provides a method for preparing the environmentally friendly composite corrosion and scale inhibitor, comprising mixing the corrosion inhibitor, the scale inhibitor, the antioxidant and the deionized water according to the dosage.

[0021] Thirdly, this invention provides the application of the aforementioned environmentally friendly composite corrosion and scale inhibitor in the cooling of energy storage equipment. The environmentally friendly composite corrosion and scale inhibitor provided by this invention is used in the manufacture of coolants for energy storage equipment. It possesses excellent metal corrosion protection, scale inhibition performance, and environmental performance, effectively preventing metal corrosion and flow channel blockage, and ensuring the normal operation of the temperature control system of the energy storage equipment.

[0022] The beneficial effects of this invention are at least as follows:

[0023] (1) The corrosion inhibitor compositions of organic acid compounds, isoquinoline compounds, and glycoside compounds of the present invention have excellent corrosion inhibition effects on a variety of metals in electrochemical systems.

[0024] (2) The polyaspartic acid scale inhibitor and corrosion inhibitor composition of the present invention has a significant synergistic effect, which can significantly improve the scale inhibition effect and promote the metal corrosion inhibition effect.

[0025] (3) The present invention uses functional components with low toxicity and less environmental pollution. At the same time, due to the use of a composite corrosion and scale inhibitor, equipment manufacturers can choose the ratio with antifreeze according to the usage environment, reduce the use of antifreeze, and thus minimize the harm to the environment. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0027] Unless otherwise stated, all raw materials and reagents used in the following examples are commercially available products or can be prepared by known methods. Where specific techniques or conditions are not specified in the examples, they are performed using conventional methods or in accordance with techniques or conditions described in the literature in this field, or according to the product instructions. Reagents and instruments whose manufacturers are not specified are all conventional products that can be purchased from legitimate channels.

[0028] The present invention will be further described below with reference to embodiments.

[0029] Example 1

[0030] The environmentally friendly composite corrosion and scale inhibitor provided in this embodiment is composed of the following components in parts by weight: 16 parts chlorogenic acid, 14 parts 1-aminoisoquinoline, 5 parts salicin, 8 parts polyaspartic acid, 5 parts ε-polylysine, and 52 parts deionized water.

[0031] This embodiment also provides a method for preparing an environmentally friendly composite corrosion and scale inhibitor: chlorogenic acid, 1-aminoisoquinoline, salicin, polyaspartic acid, ε-polylysine, and deionized water are mixed evenly at room temperature according to the above dosage, which is the environmentally friendly composite corrosion and scale inhibitor of this embodiment.

[0032] Example 2

[0033] The environmentally friendly composite corrosion and scale inhibitor provided in this embodiment is composed of the following components in parts by weight: sebacic acid 9 parts, malic acid 4 parts, isoquinoline 6.5 parts, arbutin 0.5 parts, taurine 0.2 parts, polyaspartic acid 5 parts, γ-polyglutamic acid 1 part, and deionized water 73.8 parts.

[0034] This embodiment also provides a method for preparing an environmentally friendly composite corrosion and scale inhibitor: Sebacic acid, isoquinoline, arbutin, polyaspartic acid, γ-polyglutamic acid, and deionized water are mixed evenly at room temperature according to the above dosage, which is the environmentally friendly composite corrosion and scale inhibitor of this embodiment.

[0035] Example 3

[0036] The environmentally friendly composite corrosion and scale inhibitor provided in this embodiment is composed of the following components in parts by weight: quinic acid 3 parts, malic acid 12 parts, 6-methoxyisoquinoline 14 parts, salicin 1 part, mangiferin 2 parts, polyaspartic acid 5 parts, γ-polyglutamic acid 5 parts, and deionized water 58 parts.

[0037] This embodiment also provides a method for preparing an environmentally friendly composite corrosion and scale inhibitor: Quinic acid, malic acid, 6-methoxyisoquinoline, salicin, mangiferin, polyaspartic acid, γ-polyglutamic acid, and deionized water are mixed evenly at room temperature according to the above dosage, which is the environmentally friendly composite corrosion and scale inhibitor of this embodiment.

[0038] Example 4

[0039] The environmentally friendly composite corrosion and scale inhibitor provided in this embodiment is composed of the following components in parts by weight: 14 parts chlorogenic acid, 13.2 parts 6-methoxyisoquinoline, 2.8 parts arbutin, 7 parts polyaspartic acid, 3.5 parts ε-polylysine, and 59.5 parts deionized water.

[0040] This embodiment also provides a method for preparing an environmentally friendly composite corrosion and scale inhibitor: chlorogenic acid, 6-methoxyisoquinoline, arbutin, polyaspartic acid, ε-polylysine, and deionized water are mixed evenly at room temperature according to the above dosage, which is the environmentally friendly composite corrosion and scale inhibitor of this embodiment.

[0041] Example 5

[0042] The environmentally friendly composite corrosion and scale inhibitor provided in this embodiment is composed of the following components in parts by weight: 10 parts quinic acid, 12 parts 6-hydroxy-1,2,3,4-tetrahydroisoquinoline, 4 parts mangiferin, 6 parts polyaspartic acid, 3 parts γ-polyglutamic acid, and 65 parts deionized water.

[0043] This embodiment also provides a method for preparing an environmentally friendly composite corrosion and scale inhibitor: Quinic acid, 6-hydroxy-1,2,3,4-tetrahydroisoquinoline, mangiferin, polyaspartic acid, γ-polyglutamic acid, and deionized water are mixed evenly at room temperature according to the above dosage, which is the environmentally friendly composite corrosion and scale inhibitor of this embodiment.

[0044] Example 6

[0045] An environmentally friendly composite corrosion and scale inhibitor was prepared using the method described in Example 1, except that in this example, chlorogenic acid was 5.5 parts, 1-aminoisoquinoline was 4.8 parts, salicin was 1.7 parts, polyaspartic acid was 10 parts, ε-polylysine was 5 parts, and deionized water was 73 parts.

[0046] Example 7

[0047] An environmentally friendly composite corrosion and scale inhibitor was prepared using the method of Example 1, except that in this example, chlorogenic acid 16 parts, 14 parts 1-aminoisoquinoline, 5 parts salicin, 3 parts polyaspartic acid, 5 parts ε-polylysine, and deionized water 57 parts were used.

[0048] Comparative Example 1

[0049] An environmentally friendly composite corrosion and scale inhibitor was prepared using the method of Example 2, with the only difference being that an equal amount of sodium dodecylbenzenesulfonate was used to replace the corrosion inhibitor in Example 2.

[0050] Comparative Example 2

[0051] An environmentally friendly composite corrosion and scale inhibitor was prepared using the method of Example 2, with the only difference being that in this example, an equal amount of sodium dodecylbenzenesulfonate was used to replace isoquinoline in Example 2.

[0052] Comparative Example 3

[0053] An environmentally friendly composite corrosion and scale inhibitor was prepared using the method of Example 4, the only difference being that in this example, an equal amount of chlorogenic acid was used to replace the corrosion inhibitor in Example 4.

[0054] Comparative Example 4

[0055] An environmentally friendly composite corrosion and scale inhibitor was prepared using the method of Example 4, the only difference being that an equal amount of 6-methoxyisoquinoline was used to replace the corrosion inhibitor in Example 4.

[0056] Comparative Example 5

[0057] An environmentally friendly composite corrosion and scale inhibitor was prepared using the method of Example 4, the only difference being that in this example, an equal amount of arbutin was used to replace the corrosion inhibitor in Example 4.

[0058] Comparative Example 6

[0059] An environmentally friendly composite corrosion and scale inhibitor was prepared using the method of Example 4, the only difference being that an equal amount of ethylenediaminetetramethylenephosphonic acid was used to replace the scale inhibitor in Example 4.

[0060] Experimental Example 1

[0061] The environmentally friendly composite corrosion and scale inhibitors prepared in Examples 1-7 and Comparative Examples 1-6 were mixed with ethylene glycol aqueous solution at a ratio of 5% to prepare a special coolant for energy storage equipment. The performance indicators of the special coolant for energy storage equipment were tested according to the glass corrosion test method in NB / SH / T 6000-2019, the pH change method after glass corrosion test in GB 29743.1-2022, and the static scale inhibition test method. The test results are shown in Table 1.

[0062] Table 1. Test results of coolant for energy storage equipment made with environmentally friendly composite corrosion and scale inhibitors.

[0063]

[0064]

[0065] As shown in Table 1, the environmentally friendly composite corrosion and scale inhibitor provided by this invention exhibits excellent metal corrosion inhibition, scale inhibition, and pH stability. Example 1 demonstrates the best metal corrosion inhibition, scale inhibition, and pH stability. Compared to Example 2, Comparative Examples 1 and 2, and compared to Example 4, Comparative Examples 3, 4, and 5, show a significant increase in corrosion test data for glassware made of various metals, indicating a strong synergistic effect among the components of the corrosion inhibitor composition of this invention.

[0066] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An environmentally friendly composite corrosion and scale inhibitor, characterized in that, The composition comprises the following ingredients by weight percentage: corrosion inhibitor 20-35%; scale inhibitor 5-8%; antioxidant 2-5%; water balance; the corrosion inhibitor is a combination of organic acid compound, isoquinoline compound and glycoside compound with weight ratio of 1:(1.2-0.5):(0.4-0.05); the scale inhibitor is polyaspartic acid; the organic acid compound is selected from one or more of chlorogenic acid, quinic acid, sebacic acid and malic acid; the isoquinoline compound is selected from one or more of 1-aminoisoquinoline, 6-hydroxy-1,2,3,4-tetrahydroisoquinoline and isoquinoline; the glycoside compound is selected from one or more of salicin, mangiferin and tanacetin; and the antioxidant is epsilon-polylysine.

2. The environment-friendly composite corrosion and scale inhibitor according to claim 1, characterized in that, The composition comprises the following ingredients by weight percentage: chlorogenic acid 15-17%, 1-aminoisoquinoline 13-15%, salicin 4-6%, polyaspartic acid 7-9%, epsilon-polylysine 4-6%, and deionized water in balance.

3. The preparation method of the environmentally friendly composite corrosion and scale inhibitor according to claim 2, characterized in that, The method comprises mixing the corrosion inhibitor, scale inhibitor, antioxidant and deionized water by weight.

4. The application of the environment-friendly composite corrosion and scale inhibitor in claim 1 or 2 in the cooling of energy storage devices.

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