CN116770310A - High-temperature acidification corrosion inhibitor for titanium-nickel alloy of thickening hydrochloric acid system, and preparation method and application thereof - Google Patents
High-temperature acidification corrosion inhibitor for titanium-nickel alloy of thickening hydrochloric acid system, and preparation method and application thereof Download PDFInfo
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- CN116770310A CN116770310A CN202310718353.4A CN202310718353A CN116770310A CN 116770310 A CN116770310 A CN 116770310A CN 202310718353 A CN202310718353 A CN 202310718353A CN 116770310 A CN116770310 A CN 116770310A
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- hydrochloric acid
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- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 title claims abstract description 332
- 230000007797 corrosion Effects 0.000 title claims abstract description 100
- 238000005260 corrosion Methods 0.000 title claims abstract description 100
- 239000003112 inhibitor Substances 0.000 title claims abstract description 57
- 230000020477 pH reduction Effects 0.000 title claims abstract description 43
- 229910000990 Ni alloy Inorganic materials 0.000 title claims abstract description 39
- HZEWFHLRYVTOIW-UHFFFAOYSA-N [Ti].[Ni] Chemical compound [Ti].[Ni] HZEWFHLRYVTOIW-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 230000008719 thickening Effects 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 168
- 239000007788 liquid Substances 0.000 claims abstract description 99
- 239000007787 solid Substances 0.000 claims abstract description 70
- 239000004115 Sodium Silicate Substances 0.000 claims abstract description 28
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910052911 sodium silicate Inorganic materials 0.000 claims abstract description 28
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 21
- 239000002904 solvent Substances 0.000 claims abstract description 17
- 239000004094 surface-active agent Substances 0.000 claims abstract description 13
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 claims abstract description 11
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical group [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 claims description 54
- 238000003756 stirring Methods 0.000 claims description 37
- 238000002156 mixing Methods 0.000 claims description 26
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 19
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 17
- ICLYJLBTOGPLMC-KVVVOXFISA-N (z)-octadec-9-enoate;tris(2-hydroxyethyl)azanium Chemical compound OCCN(CCO)CCO.CCCCCCCC\C=C/CCCCCCCC(O)=O ICLYJLBTOGPLMC-KVVVOXFISA-N 0.000 claims description 15
- QYLFHLNFIHBCPR-UHFFFAOYSA-N 1-ethynylcyclohexan-1-ol Chemical compound C#CC1(O)CCCCC1 QYLFHLNFIHBCPR-UHFFFAOYSA-N 0.000 claims description 15
- 229940117013 triethanolamine oleate Drugs 0.000 claims description 15
- UVQZZPLZMQGYNU-UHFFFAOYSA-N 3-anilino-1-phenylpropan-1-one Chemical compound C=1C=CC=CC=1C(=O)CCNC1=CC=CC=C1 UVQZZPLZMQGYNU-UHFFFAOYSA-N 0.000 claims description 13
- 239000002994 raw material Substances 0.000 claims description 12
- YVBOZGOAVJZITM-UHFFFAOYSA-P ammonium phosphomolybdate Chemical compound [NH4+].[NH4+].[NH4+].[NH4+].[O-]P([O-])=O.[O-][Mo]([O-])(=O)=O YVBOZGOAVJZITM-UHFFFAOYSA-P 0.000 claims description 10
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 8
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical group OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 claims description 7
- 229920000053 polysorbate 80 Polymers 0.000 claims description 7
- 229960004418 trolamine Drugs 0.000 claims description 7
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 6
- JICGTNNQQNZRHZ-UHFFFAOYSA-N oct-1-yn-1-ol Chemical compound CCCCCCC#CO JICGTNNQQNZRHZ-UHFFFAOYSA-N 0.000 claims description 6
- FVAUCKIRQBBSSJ-UHFFFAOYSA-M sodium iodide Chemical compound [Na+].[I-] FVAUCKIRQBBSSJ-UHFFFAOYSA-M 0.000 claims description 6
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical group C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 5
- 229910052708 sodium Inorganic materials 0.000 claims description 5
- 239000011734 sodium Substances 0.000 claims description 5
- 229920004890 Triton X-100 Polymers 0.000 claims description 4
- -1 butynediol Chemical compound 0.000 claims description 4
- 238000005303 weighing Methods 0.000 claims description 4
- QXJGVDOFFACGES-UHFFFAOYSA-N 3-(benzylamino)-1-phenylpropan-1-one Chemical compound C=1C=CC=CC=1C(=O)CCNCC1=CC=CC=C1 QXJGVDOFFACGES-UHFFFAOYSA-N 0.000 claims description 3
- YZTCGYARZGKANI-UHFFFAOYSA-N 3-(diethylamino)-1-phenylpropan-1-one Chemical group CCN(CC)CCC(=O)C1=CC=CC=C1 YZTCGYARZGKANI-UHFFFAOYSA-N 0.000 claims description 3
- MLRKYSNODSLPAB-UHFFFAOYSA-N hex-1-yn-1-ol Chemical compound CCCCC#CO MLRKYSNODSLPAB-UHFFFAOYSA-N 0.000 claims description 3
- 239000013504 Triton X-100 Substances 0.000 claims description 2
- 235000009518 sodium iodide Nutrition 0.000 claims description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract description 48
- 229910001069 Ti alloy Inorganic materials 0.000 abstract description 28
- 229910045601 alloy Inorganic materials 0.000 abstract description 28
- 239000000956 alloy Substances 0.000 abstract description 28
- 229910052759 nickel Inorganic materials 0.000 abstract description 24
- 230000000694 effects Effects 0.000 abstract description 7
- 230000005764 inhibitory process Effects 0.000 abstract description 5
- 239000000243 solution Substances 0.000 description 99
- 230000000052 comparative effect Effects 0.000 description 17
- CSCPPACGZOOCGX-UHFFFAOYSA-N acetone Substances CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- APUPEJJSWDHEBO-UHFFFAOYSA-P ammonium molybdate Chemical compound [NH4+].[NH4+].[O-][Mo]([O-])(=O)=O APUPEJJSWDHEBO-UHFFFAOYSA-P 0.000 description 6
- 239000011609 ammonium molybdate Substances 0.000 description 6
- 235000018660 ammonium molybdate Nutrition 0.000 description 6
- 229940010552 ammonium molybdate Drugs 0.000 description 6
- 239000000203 mixture Substances 0.000 description 6
- 239000002253 acid Substances 0.000 description 5
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 4
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 4
- 238000002161 passivation Methods 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 3
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical class [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000011684 sodium molybdate Substances 0.000 description 2
- 235000015393 sodium molybdate Nutrition 0.000 description 2
- TVXXNOYZHKPKGW-UHFFFAOYSA-N sodium molybdate (anhydrous) Chemical compound [Na+].[Na+].[O-][Mo]([O-])(=O)=O TVXXNOYZHKPKGW-UHFFFAOYSA-N 0.000 description 2
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 239000004408 titanium dioxide Substances 0.000 description 2
- QLOKJRIVRGCVIM-UHFFFAOYSA-N 1-[(4-methylsulfanylphenyl)methyl]piperazine Chemical compound C1=CC(SC)=CC=C1CN1CCNCC1 QLOKJRIVRGCVIM-UHFFFAOYSA-N 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910021607 Silver chloride Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 239000002671 adjuvant Substances 0.000 description 1
- 125000000304 alkynyl group Chemical group 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 150000003863 ammonium salts Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000002915 carbonyl group Chemical group [*:2]C([*:1])=O 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000005842 heteroatom Chemical group 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 239000012286 potassium permanganate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Abstract
The application relates to the technical field of oilfield corrosion and protection, in particular to a titanium-nickel alloy high-temperature acidification corrosion inhibitor of a thickening hydrochloric acid system, a preparation method and application thereof. The high-temperature acidification corrosion inhibitor consists of two components, namely a solid agent A and a liquid agent B, wherein the solid agent A consists of phosphomolybdate and sodium silicate, and the liquid agent B consists of iodide, a solvent, alkynol, an auxiliary agent and a surfactant. The agent A is mainly used for reducing the corrosion rate of the titanium alloy in the thickened hydrochloric acid liquid, and the agent B is mainly used for reducing the corrosion influence of the agent A on the nickel-based alloy and improving the corrosion resistance of the nickel-based alloy in the thickened hydrochloric acid liquid. The corrosion inhibitor provided by the application has good dispersibility in 20% thickened hydrochloric acid, the use temperature can reach 140 ℃, the corrosion inhibition effect is obvious, and the service safety of titanium alloy and nickel-based alloy pipes in the thickened hydrochloric acid can be ensured.
Description
Technical Field
The application relates to the technical field of oilfield corrosion and protection, in particular to a titanium-nickel alloy high-temperature acidification corrosion inhibitor of a thickening hydrochloric acid system, a preparation method and application thereof.
Background
Along with the oil in ChinaThe gas exploitation enters a deep age, a large number of newly ascertained oil gas resources reach the depth of 6000 meters, 7000 meters and even 8000 meters, and are partially stored in compact shale or hypotonic rock, and the gas exploitation is high in temperature, high in pressure and high in H content 2 S and CO 2 Is a complex and demanding condition for mining equipment and technology. Although the corrosion-resistant nickel-base alloy oil pipe and the downhole tool with high strength and good creep resistance meet the construction requirements, the corrosion-resistant nickel-base alloy oil pipe and the downhole tool are high in price, and the exploitation cost is greatly increased. The titanium alloy has the advantages of low density, high specific strength, good chemical stability, good technological performance and the like, can ensure that the tubular column has the characteristics of high strength, light weight and low cost, and simultaneously the titanium alloy is subjected to high-temperature high-pressure CO 2 +Cl - +H 2 Has good resistance to uniform corrosion, localized corrosion and SCC in S environment, and is shown to be high in H content 2 S and CO 2 The application of the deep well and ultra-deep well pipe has great potential, but the domestic titanium alloy oil pipe is applied to Sichuan dam high H-content for the first time in 2015 2 After the deep S well, there are few reports of the application of titanium alloy oil pipes, which are mainly caused by the following two reasons.
Firstly, the corrosion resistance of the titanium alloy is derived from the fact that a dense titanium dioxide passivation film is formed by oxidizing the surface of the alloy, the titanium dioxide passivation film isolates metal from being contacted with corrosive media, but the continuity of the passivation film is damaged by reducing acid, the oxidation potential of titanium metal in a low-pH environment is obviously increased, and the passivation film is difficult to regenerate. The high-concentration hydrochloric acid used during acidizing and fracturing is extremely easy to cause corrosion of the titanium alloy, corrosion is more serious after the temperature and pressure of the stratum are increased, and the current lack of an environment-friendly and economical method ensures that the titanium alloy oil well pipe column runs safely at high temperature and high pressure.
Second, in actual production, titanium alloy tubing is required for use with tubing or connection tools of nickel-based alloys for safety and equipment integrity considerations, which further increases the risk of failure of the downhole equipment during acid fracturing operations. The specific reasons are as follows: metal ion salts and their oxides (e.g., potassium chromate, potassium permanganate, sodium nitrite, sodium molybdate, silver chloride, etc.) with higher oxidation potentials are often required as corrosion inhibitors to reduce the corrosion rate of titanium alloys and to aid in their safe operation. However, the strong oxidants oxidize nickel, iron, molybdenum, cobalt or niobium and other elements in the nickel-based alloy at the same time, and the generated oxides are dissolved in an acidic solution, so that the corrosion resistance of the nickel-based alloy in acid liquor is affected.
Therefore, under the urgent need of upgrading and upgrading the high-temperature high-pressure oil-gas well pipe column, how to reconcile the contradiction, it is particularly important to develop a high-temperature acidification corrosion inhibitor capable of protecting titanium alloy and nickel base alloy simultaneously.
Disclosure of Invention
Aiming at the defects existing in the prior art, the application provides a high-temperature acidification corrosion inhibitor of a thickening hydrochloric acid system titanium-nickel alloy, a preparation method and application thereof. The agent A is mainly used for reducing the corrosion rate of the titanium alloy in the thickened hydrochloric acid liquid, and the agent B is mainly used for reducing the corrosion influence of the agent A on the nickel-based alloy and improving the corrosion resistance of the nickel-based alloy in the thickened hydrochloric acid liquid. The corrosion inhibitor is safe, environment-friendly, good in compatibility and good in corrosion inhibition effect, and is suitable for being used under severe working conditions.
In order to achieve the above purpose, the technical scheme of the application is as follows:
the titanium-nickel alloy high-temperature acidification corrosion inhibitor of the thickening hydrochloric acid system is prepared from a solid agent A and a liquid agent B;
the solid A agent consists of the following raw materials in percentage by weight: 80-90% of phosphomolybdate and 10-20% of sodium silicate, wherein the sum of the mass percentages of the phosphomolybdate and the sodium silicate is 100%;
the liquid B agent consists of the following raw materials in percentage by weight: 0.3 to 0.5 percent of iodide, 10 to 15 percent of solvent, 15 to 30 percent of alkynol, 20 to 30 percent of auxiliary agent, 15 to 25 percent of auxiliary agent and 14 to 20 percent of surfactant, wherein the sum of the mass percentages of the raw materials in the liquid B agent is 100 percent;
wherein the mass ratio of the solid agent A to the liquid agent B is 0.8-1:1-1.5.
Preferably, the phosphomolybdate is selected from sodium phosphomolybdate or ammonium phosphomolybdate.
Preferably, the iodide is selected from potassium iodide or sodium iodide.
Preferably, the solvent is selected from N, N , Dimethylformamide, ethanol, isopropanol or ethylene glycol.
Preferably, the alkynol is selected from 1-ethynyl cyclohexanol, butynediol, hexynol or octynol.
Preferably, the adjuvant is selected from 1-phenyl-3-diethylamino-1-propanone, 1-phenyl-3-phenylamino-1-propanone or 1-phenyl-3-benzylamino-1-propanone.
Preferably, the auxiliary is selected from triethanolamine or triethanolamine oleate.
Preferably, the surfactant is selected from the group consisting of triton X-100, OP-10, and Tween 80.
The application also discloses a preparation method of the titanium-nickel alloy high-temperature acidification corrosion inhibitor of the thickening hydrochloric acid system, which comprises the following steps:
weighing: weighing a solid agent A and a liquid agent B according to the following weight percentages, wherein the solid agent A consists of the following raw materials in percentage by weight: 80-90% of phosphomolybdate and 10-20% of sodium silicate; the liquid B agent consists of the following raw materials in percentage by weight: 0.3 to 0.5 percent of iodide, 10 to 15 percent of solvent, 15 to 30 percent of alkynol, 20 to 30 percent of auxiliary agent, 15 to 25 percent of auxiliary agent and 14 to 20 percent of surfactant for standby;
preparing a solid A agent: uniformly mixing phosphomolybdate and sodium silicate to obtain a solid agent A;
preparing a liquid B agent: firstly, dissolving iodide in a solvent, then adding alkynol into the solvent and uniformly mixing, and then sequentially adding an auxiliary agent, an auxiliary agent and a surfactant into the solvent and uniformly mixing to obtain a liquid agent B;
preparing a titanium-nickel alloy high-temperature acidification corrosion inhibitor of a thickening hydrochloric acid system: and mixing the solid agent A with the liquid agent B to obtain the titanium-nickel alloy high-temperature acidification corrosion inhibitor of the thickening hydrochloric acid system.
The application also protects the application of the titanium-nickel alloy high-temperature acidification corrosion inhibitor of the thickening hydrochloric acid system in preparing thickening hydrochloric acid liquid, and the application method comprises the following steps: preparing hydrochloric acid solution with the mass fraction of 20%, adding solid agent A into the solution, stirring the solution uniformly, adding liquid agent B into the solution, mixing the solution uniformly, adding gel into the solution, and stirring the solution into gel to obtain the thickened hydrochloric acid solution.
Compared with the prior art, the application has the beneficial effects that:
1. the application provides a high-temperature acidification corrosion inhibitor for a titanium alloy and nickel-based alloy of a thickening hydrochloric acid system, wherein a solid A agent can efficiently reduce the corrosion rate of the titanium alloy in a high-temperature thickening hydrochloric acid solution. Compared with strong oxidative chromates used in the traditional process, phosphomolybdates with relatively weak oxidative performance are used for replacing chromates, and after the sodium silicate and the phosphomolybdates are compounded, the film forming performance of the phosphomolybdates is improved, the injury of the phosphomolybdates and the sodium silicate to human bodies and the environment is greatly reduced, the requirements of environmental protection are met, and meanwhile, the risk of gel breaking of thickened acid liquor can be reduced. In addition, the phosphomolybdate and the silicate are compounded for use, the synergistic effect is obvious, and the corrosion inhibition effect is obviously superior to that of single phosphomolybdate and silicate. And the comparison research results show that the mass ratio is 8-9: 1-2, the excessive precipitation of sodium silicate can be avoided, the dosage of sodium phosphomolybdate can be reduced, and the economic cost can be saved.
2. The application provides a high-temperature acidification corrosion inhibitor for a thickening hydrochloric acid system titanium alloy and a nickel-based alloy, wherein a liquid B agent is mainly used for reducing the corrosion resistance influence of an A agent on the nickel-based alloy and reducing the corrosion rate of the A agent in a thickening acid. The liquid B agent consists of iodide, a solvent, alkynol, an auxiliary agent and a surfactant, wherein the solvent and the surfactant are used for increasing the solubility and the dispersibility of the corrosion inhibitor; the alkynol, the auxiliary agent and the auxiliary agent contain a large amount of rigid conjugated structures such as benzene rings, alkynyl groups, double bonds, carbonyl groups, carboxyl groups, hydroxyl groups, ammonium salts and the like and heteroatom groups, can be firmly combined on the surface of the nickel-based alloy through coordination bonds and chemical/physical adsorption, iodide molecules further block small-volume gaps, and together construct a firm and compact adsorption film, so that the aim of protecting the nickel-based alloy is fulfilled. And the chemicals used in the liquid B agent are low in toxicity, environment-friendly, low in price and easy to obtain, and simple to manufacture, and the safety and economical principles are met.
3. The solid agent A and the liquid agent B have good compatibility and excellent matching use effect, the corrosion inhibitor provided by the application has good dispersibility in the thickened hydrochloric acid liquid with the mass fraction of hydrochloric acid of 20%, the use temperature can reach 140 ℃, the corrosion inhibition effect is obvious, and the service safety of titanium alloy and nickel-based alloy pipes in the thickened hydrochloric acid can be ensured at the same time.
Drawings
FIG. 1 is a diagram of a thickened hydrochloric acid solution prepared in example 6 of the present application after corrosion inhibitor addition;
FIG. 2 is a graphical representation of the corrosion performance of a thickened hydrochloric acid solution of comparative example 3 on a titanium alloy and nickel-based alloy, a) titanium alloy, b) nickel-based alloy; comparative graphical representation of corrosion performance of the titanium alloy and nickel-based alloy with the gelled hydrochloric acid solution of example 6, c) titanium alloy, d) nickel-based alloy.
Detailed Description
The following detailed description of specific embodiments of the application is, but it should be understood that the application is not limited to specific embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application. The experimental methods described in the examples of the present application are conventional methods unless otherwise specified.
Example 1
The preparation method of the thickened hydrochloric acid liquid comprises the following steps:
preparing a hydrochloric acid solution with the mass fraction of 20%, then adding a solid A agent with the mass fraction of 1.6% into the hydrochloric acid solution, uniformly stirring, adding a liquid B agent with the mass fraction of 2% into the hydrochloric acid solution, uniformly mixing, and then adding a gel agent with the mass fraction of 1% into the hydrochloric acid solution, and stirring to form gel to obtain a thickened hydrochloric acid solution;
the titanium-nickel alloy high-temperature acidification corrosion inhibitor of the thickening hydrochloric acid system consists of a solid agent A and a liquid agent B, wherein the solid agent A consists of the following raw materials in percentage by mass: 80% sodium phosphomolybdate and 20% sodium silicate; the liquid B agent consists of the following raw materials in percentage by mass: 0.3% of potassium iodide, 10% of N, N-dimethylformamide, 30% of 1-ethynyl cyclohexanol, 20% of 1-phenyl-3-phenylamino-1-acetone, 25% of triethanolamine oleate and 14.7% of OP-10.
Example 2
The preparation method of the thickened hydrochloric acid liquid comprises the following steps:
preparing a hydrochloric acid solution with the mass fraction of 20%, then adding a solid A agent with the mass fraction of 1.8% into the hydrochloric acid solution, uniformly stirring, adding a liquid B agent with the mass fraction of 2% into the hydrochloric acid solution, uniformly mixing, and then adding a gel agent with the mass fraction of 1% into the hydrochloric acid solution, and stirring to form gel to obtain a thickened hydrochloric acid solution;
the titanium-nickel alloy high-temperature acidification corrosion inhibitor of the thickening hydrochloric acid system consists of a solid agent A and a liquid agent B, wherein the solid agent A consists of 90% of sodium molybdate and 10% of sodium silicate; the liquid B agent consists of 0.3% of potassium iodide, 10% of N, N-dimethylformamide, 30% of 1-ethynyl cyclohexanol, 20% of 1-phenyl-3-phenylamino-1-acetone, 25% of triethanolamine oleate and 14.7% of OP-10.
Example 3
The preparation method of the thickened hydrochloric acid liquid comprises the following steps:
preparing a hydrochloric acid solution with the mass fraction of 20%, then adding a solid agent A with the mass fraction of 2% into the hydrochloric acid solution, uniformly stirring, adding a liquid agent B with the mass fraction of 2.8% into the hydrochloric acid solution, uniformly mixing, and then adding a gel agent with the mass fraction of 1% into the hydrochloric acid solution, and stirring to form gel to obtain a thickened hydrochloric acid solution;
the titanium-nickel alloy high-temperature acidification corrosion inhibitor of the thickening hydrochloric acid system consists of a solid agent A and a liquid agent B, wherein the solid agent A consists of 90% of ammonium molybdate and 10% of sodium silicate; the liquid B agent comprises 0.3% potassium iodide and 10% N, N , -dimethylformamide, 30% of 1-ethynyl cyclohexanol, 20% of 1-phenyl-3-phenylamino-1-propanone, 25% of triethanolamine oleate, 14.7% of OP-10.
Example 4
The preparation method of the thickened hydrochloric acid liquid comprises the following steps:
preparing a hydrochloric acid solution with the mass fraction of 20%, then adding a solid agent A with the mass fraction of 2% into the hydrochloric acid solution, uniformly stirring, adding a liquid agent B with the mass fraction of 3% into the hydrochloric acid solution, uniformly mixing, and then adding a gel agent with the mass fraction of 1% into the hydrochloric acid solution, and stirring to form gel to obtain a thickened hydrochloric acid solution;
the titanium-nickel alloy high-temperature acidification corrosion inhibitor of the thickening hydrochloric acid system consists of a solid agent A and a liquid agent B, wherein the solid agent A consists of 90% of ammonium molybdate and 10% of sodium silicate; the liquid B agent comprises 0.4% potassium iodide and 13% N, N , -dimethylformamide, 25% of 1-ethynyl cyclohexanol, 25% of 1-phenyl-3-phenylamino-1-propanone, 20% of triethanolamine oleate, 16.6% of OP-10.
Example 5
The preparation method of the thickened hydrochloric acid liquid comprises the following steps:
preparing a hydrochloric acid solution with the mass fraction of 20%, then adding a solid agent A with the mass fraction of 2% into the hydrochloric acid solution and stirring the mixture uniformly, then adding a liquid agent B with the mass fraction of 2.4% into the hydrochloric acid solution and mixing the mixture uniformly, and then adding a gel agent with the mass fraction of 1% into the mixture and stirring the mixture to form gel to obtain a thickened hydrochloric acid solution;
the titanium-nickel alloy high-temperature acidification corrosion inhibitor of the thickening hydrochloric acid system consists of a solid agent A and a liquid agent B, wherein the solid agent A consists of 90% of ammonium molybdate and 10% of sodium silicate; the liquid B agent comprises 0.5% potassium iodide, 15% N, N , -dimethylformamide, 20% of 1-ethynyl cyclohexanol, 30% of 1-phenyl-3-phenylamino-1-propanone, 15% of triethanolamine oleate, 19.5% of OP-10.
Example 6
The preparation method of the thickened hydrochloric acid liquid comprises the following steps:
preparing a hydrochloric acid solution with the mass fraction of 20%, then adding a solid agent A with the mass fraction of 2% into the hydrochloric acid solution, uniformly stirring, adding a liquid agent B with the mass fraction of 2% into the hydrochloric acid solution, uniformly mixing, and then adding a gel agent with the mass fraction of 1% into the hydrochloric acid solution, and stirring to form gel to obtain a thickened hydrochloric acid solution;
the titanium-nickel alloy high-temperature acidification corrosion inhibitor of the thickening hydrochloric acid system consists of a solid agent A and a liquid agent B, wherein the solid agent A consists of 90% of ammonium molybdate and 10% of sodium silicate; the liquid B agent comprises 0.4% potassium iodide and 13% N, N , -dimethylformamide, 15% of 1-ethynyl cyclohexanol, 30% of 1-phenyl-3-phenylamino-1-propanone, 25% of triethanolamine oleate, 16.6% of OP-10.
Example 7
The preparation method of the thickened hydrochloric acid liquid comprises the following steps:
preparing a hydrochloric acid solution with the mass fraction of 20%, then adding a solid agent A with the mass fraction of 2% into the hydrochloric acid solution, uniformly stirring, adding a liquid agent B with the mass fraction of 2% into the hydrochloric acid solution, uniformly mixing, and then adding a gel agent with the mass fraction of 1% into the hydrochloric acid solution, and stirring to form gel to obtain a thickened hydrochloric acid solution;
the titanium-nickel alloy high-temperature acidification corrosion inhibitor of the thickening hydrochloric acid system consists of a solid agent A and a liquid agent B, wherein the solid agent A consists of 90% of ammonium molybdate and 10% of sodium silicate; the liquid B agent comprises 0.4% potassium iodide and 13% N, N , -dimethylformamide, 15% of 1-ethynyl cyclohexanol, 30% of 1-phenyl-3-phenylamino-1-propanone, 25% of triethanolamine oleate, 16.6% of OP-10.
Example 8
The preparation method of the thickened hydrochloric acid liquid comprises the following steps:
preparing a hydrochloric acid solution with the mass fraction of 20%, then adding a solid agent A with the mass fraction of 2% into the hydrochloric acid solution, uniformly stirring, adding a liquid agent B with the mass fraction of 2% into the hydrochloric acid solution, uniformly mixing, and then adding a gel agent with the mass fraction of 1% into the hydrochloric acid solution, and stirring to form gel to obtain a thickened hydrochloric acid solution;
the titanium-nickel alloy high-temperature acidification corrosion inhibitor of the thickening hydrochloric acid system consists of a solid agent A and a liquid agent B, wherein the solid agent A consists of 90% of ammonium molybdate and 10% of sodium silicate; the liquid B agent comprises 0.4% potassium iodide and 13% N, N , -dimethylformamide, 15% of 1-ethynyl cyclohexanol, 30% of 1-phenyl-3-phenylamino-1-propanone, 25% of triethanolamine oleate, 16.6% of OP-10.
Comparative example 1
The preparation method of the thickened hydrochloric acid liquid comprises the following steps:
preparing a hydrochloric acid solution with the mass fraction of 20%, then adding a solid agent A with the mass fraction of 2% into the hydrochloric acid solution, uniformly stirring, adding a liquid agent B with the mass fraction of 2% into the hydrochloric acid solution, uniformly mixing, and then adding a gel agent with the mass fraction of 1% into the hydrochloric acid solution, and stirring to form gel to obtain a thickened hydrochloric acid solution;
the titanium-nickel alloy high-temperature acidification corrosion inhibitor of the thickening hydrochloric acid system consists of a solid agent A and a liquid agent B, wherein the solid agent A consists of ammonium phosphomolybdate; the liquid B agent comprises 0.4% potassium iodide and 13% N, N , -dimethylformamide, 15% of 1-ethynyl cyclohexanol, 30% of 1-phenyl-3-phenylamino-1-propanone, 25% of triethanolamine oleate, 16.6% of OP-10.
Comparative example 2
The preparation method of the thickened hydrochloric acid liquid comprises the following steps:
preparing a hydrochloric acid solution with the mass fraction of 20%, then adding a solid agent A with the mass fraction of 2% into the hydrochloric acid solution, uniformly stirring, adding a liquid agent B with the mass fraction of 2% into the hydrochloric acid solution, uniformly mixing, and then adding a gel agent with the mass fraction of 1% into the hydrochloric acid solution, and stirring to form gel to obtain a thickened hydrochloric acid solution;
the titanium-nickel alloy high-temperature acidification corrosion inhibitor of the thickening hydrochloric acid system consists of a solid agent A and a liquid agent B, wherein the solid agent A consists of sodium silicate; the liquid B agent comprises 0.4% potassium iodide and 13% N, N , -dimethylformamide, 15% of 1-ethynyl cyclohexanol, 30% of 1-phenyl-3-phenylamino-1-propanone, 25% of triethanolamine oleate, 16.6% of OP-10.
The corrosion rate is evaluated by a high-temperature high-pressure dynamic hanging piece corrosion experiment method in the oil and gas industry standard SY/T5405-2019, corrosion inhibitor performance test method for acidification and evaluation index. The test temperature is 140 ℃, the test pressure is 16MPa, the test duration is 4 hours, and the rotating speed is 60r/min. The titanium alloy test piece is made of TC4, and the nickel-based alloy test piece is made of 4C-125. The corrosion inhibitor compositions and the addition data of examples 1 to 8 and comparative examples 1 to 2 are shown in Table 1, and the corrosion rates of the thickened hydrochloric acid solutions of examples 1 to 8 and comparative examples 1 to 2 are shown in Table 2:
TABLE 1 Corrosion inhibitor composition and addition data for examples 1-8 and comparative examples 1-2
TABLE 2 corrosion rates of the thickened hydrochloric acid solutions measured in examples 1-8 and comparative examples 1-2
The test results of examples 1-8 show that the phosphomolybdate in combination with silicate is effective in reducing the corrosion rate of titanium alloys and that ammonium phosphomolybdate is better than sodium phosphomolybdate. Examples 3-8 comparison shows that 1-ethynyl cyclohexanol, 1-phenyl-3-phenylamino-1-propanone play an important role in protecting nickel-base alloy, corrosion inhibitors prepared by adjusting the proportion of 1-ethynyl cyclohexanol, 1-phenyl-3-phenylamino-1-propanone can all exert excellent performance, and corrosion rates of titanium alloy and nickel-base alloy are lower than 45g/cm 2 H. The test results of comparative examples 1-2 show that the single use of phosphomolybdate or silicate has higher corrosion rate in the thickened hydrochloric acid liquid with the mass fraction of hydrochloric acid of 20 percent and has poor protective effect on titanium alloy and nickel-based alloy.
Based on the above examples, the effect of the corrosion inhibitor is determined by adjusting different solvents, alkynols, auxiliary agents, surfactant types and proportions, and the results are as follows:
example 9
The preparation method of the thickened hydrochloric acid liquid comprises the following steps:
preparing a hydrochloric acid solution with the mass fraction of 20%, then adding a solid agent A with the mass fraction of 2% into the hydrochloric acid solution, uniformly stirring, adding a liquid agent B with the mass fraction of 2% into the hydrochloric acid solution, uniformly mixing, and then adding a gel agent with the mass fraction of 1% into the hydrochloric acid solution, and stirring to form gel to obtain a thickened hydrochloric acid solution;
the titanium-nickel alloy high-temperature acidification corrosion inhibitor of the thickening hydrochloric acid system consists of a solid agent A and a liquid agent B, wherein the solid agent A consists of 82% of ammonium phosphomolybdate and 18% of sodium silicate; the liquid B agent consists of 0.4% of potassium iodide, 13.2% of isopropanol, 15.3% of butynediol, 29.8% of 1-phenyl-3-diethylamino-1-acetone, 24.5% of triethanolamine oleate and 16.8% of TX-100.
Example 10
The preparation method of the thickened hydrochloric acid liquid comprises the following steps:
preparing a hydrochloric acid solution with the mass fraction of 20%, then adding a solid agent A with the mass fraction of 2% into the hydrochloric acid solution, uniformly stirring, adding a liquid agent B with the mass fraction of 2% into the hydrochloric acid solution, uniformly mixing, and then adding a gel agent with the mass fraction of 1% into the hydrochloric acid solution, and stirring to form gel to obtain a thickened hydrochloric acid solution;
the titanium-nickel alloy high-temperature acidification corrosion inhibitor of the thickening hydrochloric acid system consists of a solid agent A and a liquid agent B, wherein the solid agent A consists of 84% of ammonium phosphomolybdate and 16% of sodium silicate; the liquid B agent consists of 0.4% of potassium iodide, 13.2% of ethanol, 15.3% of hexynol, 29.5% of 1-phenyl-3-phenylamino-1-acetone, 24.9% of triethanolamine oleate and 16.7% of OP-10.
Example 11
The preparation method of the thickened hydrochloric acid liquid comprises the following steps:
preparing a hydrochloric acid solution with the mass fraction of 20%, then adding a solid agent A with the mass fraction of 2% into the hydrochloric acid solution, uniformly stirring, adding a liquid agent B with the mass fraction of 2% into the hydrochloric acid solution, uniformly mixing, and then adding a gel agent with the mass fraction of 1% into the hydrochloric acid solution, and stirring to form gel to obtain a thickened hydrochloric acid solution;
the titanium-nickel alloy high-temperature acidification corrosion inhibitor of the thickening hydrochloric acid system consists of a solid agent A and a liquid agent B, wherein the solid agent A consists of 86% of ammonium phosphomolybdate and 14% of sodium silicate; the liquid B agent consists of 0.4% of potassium iodide, 13.1% of methanol, 15.6% of octynol, 29.2% of 1-phenyl-3-benzylamino-1-acetone, 25.3% of triethanolamine and 16.4% of Tween 80.
Example 12
The preparation method of the thickened hydrochloric acid liquid comprises the following steps:
preparing a hydrochloric acid solution with the mass fraction of 20%, then adding a solid agent A with the mass fraction of 2% into the hydrochloric acid solution, uniformly stirring, adding a liquid agent B with the mass fraction of 2% into the hydrochloric acid solution, uniformly mixing, and then adding a gel agent with the mass fraction of 1% into the hydrochloric acid solution, and stirring to form gel to obtain a thickened hydrochloric acid solution;
the titanium-nickel alloy high-temperature acidification corrosion inhibitor of the thickening hydrochloric acid system consists of a solid agent A and a liquid agent B, wherein the solid agent A consists of 88% of ammonium phosphomolybdate and 12% of sodium silicate; the liquid B agent consists of 0.4% of potassium iodide, 7% of ethylmethanol, 7% of ethanol, 15.0% of octynol, 29.2% of 1-phenyl-3-benzylamino-1-acetone, 25.3% of triethanolamine and 16.1% of tween 80.
TABLE 3 Corrosion efficiency measured in examples 9-12
Examples 9-12 show that the combination of the solvents (N, N-dimethylformamide, ethanol, isopropanol and methanol), alkynols (1-ethynyl cyclohexanol, butynediol, hexynylol and octynylol), auxiliary agents (1-phenyl-3-diethylamino-1-propanone, 1-phenyl-3-phenylamino-1-propanone and 1-phenyl-3-benzylamino-1-propanone), auxiliary agents (triethanolamine and triethanolamine oleate) and surfactants (TX-100, OP-10 and Tween 80) selected in the application can all exert excellent corrosion inhibition effect.
FIG. 1 is a graphical representation of the thickened hydrochloric acid solution prepared in example 8 of the present application, and the results show that the thickened hydrochloric acid solution prepared is clear and transparent, indicating that the corrosion inhibitor has good compatibility with the thickened hydrochloric acid solution.
Comparative example 3
The preparation method of the thickened hydrochloric acid liquid comprises the following steps of:
preparing a hydrochloric acid solution with the mass fraction of 20%, then adding a gel with the mass fraction of 1%, and stirring to form gel to obtain a thickened hydrochloric acid solution.
FIG. 2 is a comparative study of corrosion performance of titanium alloy and nickel-based alloy by using thickened hydrochloric acid solution of comparative example 3 and example 8, and the comparative study is measured by referring to SY/T5405-2019 corrosion test method for corrosion inhibitor for acidification and evaluation index of dynamic hanging piece corrosion test method at high temperature and high pressure, and the results show that the surfaces of the titanium alloy and nickel-based alloy test pieces are smooth and even after the corrosion inhibitor is added, which indicates that the corrosion resistance of the corrosion inhibitor is excellent.
Comparative example 4
The preparation method of the thickened hydrochloric acid liquid comprises the following steps:
preparing a hydrochloric acid solution with the mass fraction of 20%, then adding a solid A agent with the mass fraction of 2% into the hydrochloric acid solution, stirring uniformly, then adding a liquid B agent with the mass fraction of 2% into the hydrochloric acid solution, mixing uniformly, and then adding a gel agent with the mass fraction of 1% into the hydrochloric acid solution, stirring to form gel, thus obtaining a thickened hydrochloric acid solution;
the titanium-nickel alloy high-temperature acidification corrosion inhibitor of the thickening hydrochloric acid system consists of a solid agent A and a liquid agent B, wherein the solid agent A consists of 60% of ammonium phosphomolybdate and 40% of sodium silicate; the liquid B agent consists of 0.4% of potassium iodide, 7% of ethylmethanol, 7% of ethanol, 15.0% of octynol, 29.2% of 1-phenyl-3-benzylamino-1-acetone, 25.3% of triethanolamine and 16.1% of tween 80.
Comparative example 5
The preparation method of the thickened hydrochloric acid liquid comprises the following steps:
preparing a hydrochloric acid solution with the mass fraction of 20%, then adding a solid A agent with the mass fraction of 2% into the hydrochloric acid solution, stirring uniformly, then adding a liquid B agent with the mass fraction of 2% into the hydrochloric acid solution, mixing uniformly, and then adding a gel agent with the mass fraction of 1% into the hydrochloric acid solution, stirring to form gel, thus obtaining a thickened hydrochloric acid solution;
the titanium-nickel alloy high-temperature acidification corrosion inhibitor of the thickening hydrochloric acid system consists of a solid agent A and a liquid agent B, wherein the solid agent A consists of 70% of ammonium phosphomolybdate and 30% of sodium silicate; the liquid B agent consists of 0.4% of potassium iodide, 7% of ethylmethanol, 7% of ethanol, 15.0% of octynol, 29.2% of 1-phenyl-3-benzylamino-1-acetone, 25.3% of triethanolamine and 16.1% of tween 80.
TABLE 4 Corrosion efficiency measured in comparative examples 4-5
| Comparative example | 4 | 5 |
| Titanium alloy corrosion Rate (g/cm) 2 ·h) | 55.21 | 51.03 |
| Corrosion rate (g/cm) of titanium nickel alloy 2 ·h) | 42.05 | 38.42 |
The result shows that the mass ratio is 8-9: 1-2 phosphomolybdates and sodium silicate have remarkable corrosion resistance.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (10)
1. The titanium-nickel alloy high-temperature acidification corrosion inhibitor of the thickening hydrochloric acid system is characterized by being prepared from a solid agent A and a liquid agent B;
the solid A agent consists of the following raw materials in percentage by weight: 80-90% of phosphomolybdate and 10-20% of sodium silicate, wherein the sum of the mass percentages of the phosphomolybdate and the sodium silicate is 100%;
the liquid B agent consists of the following raw materials in percentage by weight: 0.3 to 0.5 percent of iodide, 10 to 15 percent of solvent, 15 to 30 percent of alkynol, 20 to 30 percent of auxiliary agent, 15 to 25 percent of auxiliary agent and 14 to 20 percent of surfactant, wherein the sum of the mass percentages of the raw materials in the liquid B agent is 100 percent;
the mass ratio of the solid agent A to the liquid agent B is 0.8-1:1-1.5.
2. The thickened hydrochloric acid system titanium-nickel alloy high temperature acidizing corrosion inhibitor of claim 1, wherein the phosphomolybdate is selected from sodium phosphomolybdate or ammonium phosphomolybdate.
3. The titanium nickel alloy high temperature acidification corrosion inhibitor of a thickened hydrochloric acid system according to claim 1 wherein said iodide is selected from potassium iodide or sodium iodide.
4. The thickened hydrochloric acid system titanium-nickel alloy high-temperature acidification corrosion inhibitor according to claim 1, wherein said solvent is selected from the group consisting of N, N , Dimethylformamide, ethanol, isopropanol or ethylene glycol.
5. The thickened hydrochloric acid system titanium-nickel alloy high temperature acidification corrosion inhibitor according to claim 1, wherein the alkynol is selected from the group consisting of 1-ethynyl cyclohexanol, butynediol, hexynol or octynol.
6. The titanium-nickel alloy high-temperature acidification corrosion inhibitor of a thickened hydrochloric acid system according to claim 1, wherein the auxiliary agent is selected from 1-phenyl-3-diethylamino-1-propanone, 1-phenyl-3-phenylamino-1-propanone or 1-phenyl-3-benzylamino-1-propanone.
7. The titanium-nickel alloy high-temperature acidification corrosion inhibitor of a thickened hydrochloric acid system according to claim 1, wherein the auxiliary agent is selected from triethanolamine or triethanolamine oleate.
8. The thickened hydrochloric acid system titanium-nickel alloy high-temperature acidification corrosion inhibitor according to claim 1, wherein the surfactant is selected from triton X-100, OP-10 or tween 80.
9. A method for preparing the titanium-nickel alloy high-temperature acidification corrosion inhibitor of a thickening hydrochloric acid system according to any one of claims 1 to 8, which is characterized by comprising the following steps:
weighing: weighing a solid agent A and a liquid agent B according to the following weight percentages, wherein the solid agent A consists of the following raw materials in percentage by weight: 80-90% of phosphomolybdate and 10-20% of sodium silicate; the liquid B agent consists of the following raw materials in percentage by weight: 0.3 to 0.5 percent of iodide, 10 to 15 percent of solvent, 15 to 30 percent of alkynol, 20 to 30 percent of auxiliary agent, 15 to 25 percent of auxiliary agent and 14 to 20 percent of surfactant for standby;
preparing a solid A agent: uniformly mixing phosphomolybdate and sodium silicate to obtain a solid agent A;
preparing a liquid B agent: firstly, dissolving iodide in a solvent, then adding alkynol into the solvent and uniformly mixing, and then sequentially adding an auxiliary agent, an auxiliary agent and a surfactant into the solvent and uniformly mixing to obtain a liquid agent B;
preparing a titanium-nickel alloy high-temperature acidification corrosion inhibitor of a thickening hydrochloric acid system: and mixing the solid agent A with the liquid agent B to obtain the titanium-nickel alloy high-temperature acidification corrosion inhibitor of the thickening hydrochloric acid system.
10. The application of the titanium-nickel alloy high-temperature acidification corrosion inhibitor of a thickening hydrochloric acid system in the preparation of thickening hydrochloric acid liquid, which is characterized in that the application method is as follows: preparing hydrochloric acid solution with the mass fraction of 20%, adding solid agent A into the solution, stirring the solution uniformly, adding liquid agent B into the solution, mixing the solution uniformly, adding gel into the solution, and stirring the solution into gel to obtain the thickened hydrochloric acid solution.
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