CN-117626268-B - Bio-based gas-phase antirust agent and preparation method thereof

Abstract

The invention discloses a biological-based gas-phase antirust agent which comprises triethanolamine, borax, ammonium benzoate, sodium gluconate, sodium citrate, tryptophan, sodium aminotrimethylene phosphonate, an organic polymer containing a glycoside unit and a sodium sulfonate unit and water. The gas phase corrosion inhibitor and the gas phase rust-proof material provided by the invention belong to multi-metal universal rust-proof materials, are suitable for galvanized aluminum magnesium steel, galvanized steel, leng Pu steel and the like, and have excellent rust-proof effects, in particular to rust-proof effects at high temperature. The gas phase corrosion inhibitor and the rust-proof material provided by the invention belong to green environment-friendly rust-proof materials, all raw materials are low in toxicity and environment-friendly, and no hazardous chemical component exists in the raw materials.

Inventors

• ZHAO MINGMING
• BAI BEIBEI
• LI HONGQIN
• BAI YANAN
• WANG YANHONG

Assignees

• 北京首融汇科技发展有限公司

Dates

Publication Date

20260508

Application Date

20231221

Claims (16)

1. 1. The biological-based gas-phase antirust agent is characterized by comprising the following components in percentage by mass: 0.2-1wt% of triethanolamine, 2-5wt% of borax, 2-5wt% of ammonium benzoate, 2-5wt% of sodium gluconate, 1-2wt% of sodium citrate, 0.05-0.2wt% of tryptophan, 0.5-1wt% of sodium aminotrimethylene phosphonate, 1-3wt% of an organic polymer containing a glycoside unit and a sulfonate unit, and the balance of water.
2. 2. The biobased gas phase rust inhibitor according to claim 1, wherein the organic polymer containing a glycoside unit and a sulfonate unit is obtained by copolymerizing an esterification product of an alkyl glycoside and an alkenyl succinic anhydride and a monomer containing a sulfonic acid group.
3. 3. The bio-based gas phase rust inhibitor according to claim 2, wherein the organic polymer containing glycoside units and sulfonate units is prepared by a preparation method comprising the steps of: (1) Dissolving alkyl glycoside in alcohol solvent, adding alkali for activation, adding alkenyl succinic anhydride under protective atmosphere, heating for reaction, distilling under reduced pressure, washing, and drying to obtain esterification product of alkyl glycoside and alkenyl succinic anhydride as first monomer; (2) Copolymerizing the first monomer prepared in the step (1) and the second monomer containing sulfonic acid groups, and regulating the pH value to 8-9 by alkali liquor after copolymerization to obtain the organic polymer containing glycoside units and sulfonate units.
4. 4. The bio-based gas phase rust inhibitor according to claim 2, wherein the alkyl glycoside is C8-C16 alkyl glycoside having a polymerization degree of 1.1-1.7, the alkenyl succinic anhydride is at least one selected from the group consisting of propenyl succinic anhydride, 2-butene-1-yl succinic anhydride and 2-hexene-1-succinic anhydride, and the sulfonic acid group-containing monomer is 2-acrylamido-2-methylpropanesulfonic acid.
5. 5. The bio-based gas phase rust inhibitor according to claim 4, wherein the alkyl glycoside is at least one selected from APG0810, APG1214, APG0812, APG0814, APG0816, APG 1216.
6. 6. The bio-based gas phase rust inhibitor according to claim 2, wherein the molar ratio of the alkyl glycoside to the alkenyl succinic anhydride is 1:1 to 1.5, and the mass ratio of the esterification product of the alkyl glycoside and the alkenyl succinic anhydride to the sulfonic acid group-containing monomer is 10:18 to 25.
7. 7. The gas-phase rust inhibitor according to claim 3, wherein in the step (1), the alcohol solvent is at least one selected from ethanol and isopropanol, the amount of the alcohol solvent is 5-20 times the mass of the alkyl glycoside, the alkali is added for activation, the alkali is NaOH and/or KOH, the amount of the alkali added is 1.1-1.3 times the mole number of the alkyl glycoside, the activation is carried out for 1-2h at 30-40 ℃, the alkenyl succinic anhydride is at least one selected from propenyl succinic anhydride, 2-butene-1-yl succinic anhydride and 2-hexene-1-succinic anhydride, and the mole ratio of the alkyl glycoside to the alkenyl succinic anhydride is 1:1-1.5.
8. 8. The bio-based gas phase rust inhibitor according to claim 3, wherein in the step (1), the protective atmosphere is nitrogen and/or argon, the temperature-raising reaction is to raise the temperature to 35-45 ℃, and the temperature-keeping reaction is carried out for 2-5 hours; In the step (2), the copolymerization reaction condition is that a first monomer and a second monomer are added into an alcohol aqueous solution, an initiator is added, the temperature is raised to initiate the copolymerization reaction, the initiator is at least one selected from sodium persulfate, potassium persulfate and ammonium persulfate, the use amount of the initiator is 0.3-0.5wt% of the mass of the first monomer, the temperature is raised to 80-90 ℃ to initiate the copolymerization reaction, and the polymerization time is 3-5h.
9. 9. The bio-based vapor phase rust inhibitor according to claim 8, wherein in step (2), the aqueous alcohol solution is an aqueous alcohol solution having a concentration of 20 to 30% by volume of ethanol.
10. 10. The biobased gas phase rust inhibitor according to claim 8, wherein in step (2), the alkali solution is 5-20wt% aqueous solution of NaOH and/or KOH, and after pH adjustment, the powder product is obtained by freeze-drying, which is an organic polymer containing glycoside units and sulfonate units.
11. 11. The preparation method of the bio-based gas phase rust inhibitor according to any one of claims 1 to 10, which is characterized by comprising the steps of adding triethanolamine, borax, ammonium benzoate, sodium gluconate, sodium citrate, tryptophan, sodium aminotrimethylene phosphonate and an organic polymer containing a glycoside unit and a sodium sulfonate unit into water, and stirring until the organic polymer is dissolved to obtain an aqueous solution which is the gas phase rust inhibitor.
12. 12. The method for preparing the bio-based gas phase rust inhibitor according to claim 11, wherein the dissolution is carried out under the condition of 15-40 ℃ in order to ensure that each component of the rust inhibitor is fully dissolved in the stirring process.
13. 13. A gas phase rust preventive material characterized in that the raw materials thereof comprise a rust preventive base paper, the bio-based gas phase rust preventive agent according to any one of claims 1 to 12, a polymer film and a net-like or bar-like braid.
14. 14. The gas-phase rust preventive material according to claim 13, wherein the gas-phase rust preventive material is prepared by a preparation method comprising the steps of compounding a high polymer film on one side of a rust preventive base paper, compounding a layer of net-shaped or strip-shaped braided fabric on the polymer film, dip-coating or spraying the bio-based gas-phase rust preventive agent on the other side of the rust preventive base paper, and drying to obtain the gas-phase rust preventive material.
15. 15. The vapor phase rust inhibitive material of claim 13, wherein when a layer of the bio-based vapor phase rust inhibitive agent is dip-coated or spray-coated, the dip-coated or spray-coated amount of the bio-based vapor phase rust inhibitive agent is 10 to 20 g/m 2 .
16. 16. The vapor phase rust inhibitive material of claim 15, wherein the dip coating or spray coating amount of the bio-based vapor phase rust inhibitive agent is 12 to 15 g/m 2 .

Description

Bio-based gas-phase antirust agent and preparation method thereof Technical Field The invention relates to the field of gas-phase rust-preventing materials, in particular to a bio-based gas-phase rust-preventing agent and a preparation method thereof. Background With the development of metal coating technology in China, a plurality of novel coated steel plates, such as galvanized steel plates, galvanized aluminum magnesium steel plates and the like, are appeared. The galvanized aluminum magnesium steel plate is a novel high corrosion resistance coating steel plate, belongs to high-end steel plates, has application in the fields of construction, automobiles and the like, and has relatively high packaging requirements. Currently, no gas-phase rust-preventing material specially aiming at galvanized aluminum-magnesium steel plates exists on the market, so that development of a multi-metal general-purpose gas-phase corrosion inhibitor and a gas-phase rust-preventing material aiming at galvanized aluminum-magnesium steel plates and other plated steel plates is very important. The gas-phase rust-proof packaging technology combines the rust-proof paper with the gas-phase rust inhibitor, achieves the rust-proof effect by utilizing the Volatile Corrosion Inhibitor (VCI), and has the characteristics of wide application range and convenient use. In the closed space, the gas-phase rust-proof paper coated with the gas-phase corrosion inhibitor volatilizes the corrosion inhibitor component, and forms a layer of protective film on the surface of the metal or is adsorbed on the surface of the metal to reduce the metal corrosion effect. However, conventional vapor phase corrosion inhibitors often add some hazardous chemical components, such as urotropine, benzotriazole, and the like, which have serious environmental pollution. Therefore, development of the environment-friendly general-purpose vapor corrosion inhibitor and vapor rust-preventing material is very important. At present, many components of the vapor phase rust-inhibiting corrosion inhibitor contain molybdate (sodium molybdate in common) and are used for film formation to relieve corrosion, and the rust-inhibiting effect is good. For example, CN108373287A, CN106630722A, but molybdenum is heavy metal, has certain toxicity, does not accord with the development of the current green environment-friendly gas-phase rust-proof material, and sodium molybdate is high in price, so that the manufacturing cost of the multi-gas-phase rust-proof corrosion inhibitor is increased. The bio-based material is a strategic and emerging industry in China, sodium gluconate and sodium citrate have polyhydroxy structures, can generate corresponding complex with metal ions, are low in price, are biologically friendly and nontoxic, have antirust protection effects on protected metals, and have been used in the field of antirust agents. However, the rust-proof effect of sodium gluconate and sodium citrate is still to be enhanced, and the zinc-plated steel plate, zinc-plated aluminum-magnesium steel plate, in particular zinc-plated aluminum-magnesium steel plate, contains metal element aluminum box magnesium with more enhanced activity than zinc and is more easy to be corroded. At present, many rust inhibitors synergistically match inorganic rust inhibitors with organic rust inhibitors, but the effect is still unsatisfactory. The organic glycoside prepared by CN1038803116A, CN105399783A is used as an antirust component, and has better effect compared with alcohol amine gas-phase antirust. However, the inventors found that the organic glycoside was not strong in adsorption ability to metals at high temperature, resulting in limited rust inhibitive effect at 60 ℃. Therefore, the biological-based gas-phase rust inhibitor which does not use sodium molybdate and other heavy metal ions, is biologically friendly, has excellent rust resistance, and particularly has satisfactory rust resistance at high temperature, and has very important practical significance and commercial value. Disclosure of Invention Aiming at the defects of poor comprehensive antirust effect and insufficient environmental protection of steel products such as galvanized steel plates and galvanized aluminum magnesium steel plates in the prior art, the invention designs the bio-based environment-friendly high-efficiency general gas-phase antirust agent and the preparation method thereof, which can be used for effectively protecting various plating metals such as cold-general plating, galvanized steel plates and galvanized aluminum magnesium steel plates. The invention solves the technical problems by the following technical proposal: a gas-phase rust inhibitor based on biology comprises triethanolamine, borax, ammonium benzoate, sodium gluconate, sodium citrate, tryptophan, sodium aminotrimethylene phosphonate, organic polymer containing glycoside unit and sodium sulfonate unit, and water. Further, the bio-based environment-friendl