CN115418644B - Corrosion inhibitor, preparation method and application thereof in water-based cleaning agent - Google Patents
Corrosion inhibitor, preparation method and application thereof in water-based cleaning agent Download PDFInfo
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- CN115418644B CN115418644B CN202211235824.8A CN202211235824A CN115418644B CN 115418644 B CN115418644 B CN 115418644B CN 202211235824 A CN202211235824 A CN 202211235824A CN 115418644 B CN115418644 B CN 115418644B
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- bentonite
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- 238000005260 corrosion Methods 0.000 title claims abstract description 71
- 230000007797 corrosion Effects 0.000 title claims abstract description 69
- 239000003112 inhibitor Substances 0.000 title claims abstract description 55
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 42
- 239000012459 cleaning agent Substances 0.000 title claims description 32
- 238000002360 preparation method Methods 0.000 title description 8
- 229910000838 Al alloy Chemical group 0.000 claims abstract description 44
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical group [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 41
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 27
- 239000000440 bentonite Substances 0.000 claims abstract description 24
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 24
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 24
- 235000019832 sodium triphosphate Nutrition 0.000 claims abstract description 21
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 20
- -1 polyoxyethylene Polymers 0.000 claims abstract description 17
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 16
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims abstract description 14
- 150000002148 esters Chemical class 0.000 claims abstract description 14
- AUVXXFWOHPWOIB-UHFFFAOYSA-L n-cyclohexylcyclohexanamine;dihydroxy(dioxo)chromium Chemical compound O[Cr](O)(=O)=O.C1CCCCC1NC1CCCCC1 AUVXXFWOHPWOIB-UHFFFAOYSA-L 0.000 claims abstract description 13
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000176 sodium gluconate Substances 0.000 claims abstract description 12
- 235000012207 sodium gluconate Nutrition 0.000 claims abstract description 12
- 229940005574 sodium gluconate Drugs 0.000 claims abstract description 12
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 claims abstract description 12
- 229910000165 zinc phosphate Inorganic materials 0.000 claims abstract description 12
- WWZKQHOCKIZLMA-UHFFFAOYSA-N octanoic acid Chemical compound CCCCCCCC(O)=O WWZKQHOCKIZLMA-UHFFFAOYSA-N 0.000 claims abstract description 11
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims description 28
- 238000003756 stirring Methods 0.000 claims description 21
- 239000002994 raw material Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 5
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 15
- 238000004140 cleaning Methods 0.000 abstract description 6
- 230000003064 anti-oxidating effect Effects 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 28
- 230000005764 inhibitory process Effects 0.000 description 12
- 229910000737 Duralumin Inorganic materials 0.000 description 10
- 239000011248 coating agent Substances 0.000 description 10
- 238000000576 coating method Methods 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 10
- 239000002202 Polyethylene glycol Substances 0.000 description 9
- 229920001223 polyethylene glycol Polymers 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- YXIWHUQXZSMYRE-UHFFFAOYSA-N 1,3-benzothiazole-2-thiol Chemical compound C1=CC=C2SC(S)=NC2=C1 YXIWHUQXZSMYRE-UHFFFAOYSA-N 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 8
- 230000001070 adhesive effect Effects 0.000 description 8
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 6
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000005238 degreasing Methods 0.000 description 4
- HYBBIBNJHNGZAN-UHFFFAOYSA-N furfural Chemical compound O=CC1=CC=CO1 HYBBIBNJHNGZAN-UHFFFAOYSA-N 0.000 description 4
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910019142 PO4 Inorganic materials 0.000 description 2
- 239000004115 Sodium Silicate Substances 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 2
- 239000012964 benzotriazole Substances 0.000 description 2
- 229910021538 borax Inorganic materials 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000002845 discoloration Methods 0.000 description 2
- 230000003670 easy-to-clean Effects 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 235000010299 hexamethylene tetramine Nutrition 0.000 description 2
- 239000004312 hexamethylene tetramine Substances 0.000 description 2
- MTNDZQHUAFNZQY-UHFFFAOYSA-N imidazoline Chemical compound C1CN=CN1 MTNDZQHUAFNZQY-UHFFFAOYSA-N 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000010452 phosphate Substances 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 2
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 description 2
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 235000010339 sodium tetraborate Nutrition 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- BSVBQGMMJUBVOD-UHFFFAOYSA-N trisodium borate Chemical compound [Na+].[Na+].[Na+].[O-]B([O-])[O-] BSVBQGMMJUBVOD-UHFFFAOYSA-N 0.000 description 2
- ZGIPIEWHOQEVJN-UHFFFAOYSA-N 2-hydroxyethylazanium;octanoate Chemical compound NCCO.CCCCCCCC(O)=O ZGIPIEWHOQEVJN-UHFFFAOYSA-N 0.000 description 1
- 229920001817 Agar Polymers 0.000 description 1
- BTBUEUYNUDRHOZ-UHFFFAOYSA-N Borate Chemical compound [O-]B([O-])[O-] BTBUEUYNUDRHOZ-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229920000388 Polyphosphate Polymers 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 239000008272 agar Substances 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000001164 aluminium sulphate Substances 0.000 description 1
- 235000011128 aluminium sulphate Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000002173 cutting fluid Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005237 degreasing agent Methods 0.000 description 1
- 239000003405 delayed action preparation Substances 0.000 description 1
- BUACSMWVFUNQET-UHFFFAOYSA-H dialuminum;trisulfate;hydrate Chemical compound O.[Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O BUACSMWVFUNQET-UHFFFAOYSA-H 0.000 description 1
- SOCTUWSJJQCPFX-UHFFFAOYSA-N dichromate(2-) Chemical compound [O-][Cr](=O)(=O)O[Cr]([O-])(=O)=O SOCTUWSJJQCPFX-UHFFFAOYSA-N 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- ZAUUZASCMSWKGX-UHFFFAOYSA-N manganese nickel Chemical compound [Mn].[Ni] ZAUUZASCMSWKGX-UHFFFAOYSA-N 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 239000002736 nonionic surfactant Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000001205 polyphosphate Substances 0.000 description 1
- 235000011176 polyphosphates Nutrition 0.000 description 1
- 229920000137 polyphosphoric acid Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 239000010731 rolling oil Substances 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000013268 sustained release Methods 0.000 description 1
- 239000012730 sustained-release form Substances 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
- 238000010792 warming Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
- C23F11/10—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using organic inhibitors
- C23F11/167—Phosphorus-containing compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
- Detergent Compositions (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a corrosion inhibitor which is prepared from the following components in parts by weight: 1.0 to 4.0 parts of sodium gluconate, 0.5 to 2.0 parts of zinc phosphate, 6.0 to 9.0 parts of sodium tripolyphosphate, 0.1 to 0.2 parts of active alumina, 0.5 to 1.0 part of bentonite, 1.0 to 2.0 parts of dicyclohexylamine chromate, 1.0 to 5.0 parts of monoethanolamine n-octoate, 5.0 to 7.0 parts of methoxypolyethylene glycol, 3.0 to 4.0 parts of polyoxyethylene ester and 65.8 to 81.9 parts of water. The corrosion inhibitor not only can be applied to normal temperature, low temperature and high temperature, but also has good anti-corrosion and anti-oxidation effects on aluminum and aluminum alloy parts in an alkaline cleaning process, and has good compatibility and stability.
Description
Technical Field
The invention relates to a corrosion inhibitor in aluminum and aluminum alloy, in particular to an aluminum alloy corrosion inhibitor which is suitable for a weakly alkaline water-based cleaning agent.
Background
Aluminum and aluminum alloys are referred to collectively as alloys based on aluminum, with the primary alloying elements being copper, silicon, magnesium, zinc, manganese, and the secondary alloying elements being nickel, iron, titanium, chromium, lithium, and the like. Aluminum alloy is a nonferrous metal structural material most widely used in industry, and has been widely used in aluminum alloys for aviation, aerospace, automobiles, mechanical manufacturing, ships and the like. The metal surface is easy to be stained with greasy dirt in the process of processing, transporting and storing, and common rolling oil, calendaring oil, lubricating oil, cutting fluid and the like relate to the greasy dirt cleaning of the metal surface according to different processing technological processes. Therefore, in the processing process of aluminum and aluminum alloy products, the degreasing and cleaning process is an important quality control procedure, and the treatment effect directly influences the treatment effect and the product quality of the subsequent process. Regarding degreasing and cleaning of aluminum and aluminum alloys, degreasing processes for steel are used in the early days. The process bath solution has high cost, is not easy to clean and has serious corrosion. Starting from the 80 s of the 20 th century, people degrease at room temperature using acidic degreasers, alkaline and solvent degreasers; however, with the development of the modern aluminum alloy degreasing technology and the limitation of the environmental protection requirement of degreasing agents at home and abroad, water-based cleaning agents are mainly used in the market. The method has the characteristics of high efficiency, low energy consumption, simple process, safety, reliability and environment friendliness. Because aluminum and aluminum alloys are relatively active, even in weak alkaline solutions, the aluminum alloys are easy to be corroded, discolored and light-lost, so that the surface quality of the aluminum alloys is changed. At present, the common inorganic corrosion inhibitors in alkaline aluminum and aluminum alloy cleaning agents mainly comprise dichromate, silicate, phosphate, borate and the like, and the organic corrosion inhibitors mainly comprise silane, glucose, phosphate, agar, surfactant and the like, and the corrosion inhibitors are used independently and have the problems of environmental protection, health and the like.
Chinese patent No. cn2015197877. X discloses an anti-rust corrosion inhibitor and a preparation method thereof, wherein the anti-rust corrosion inhibitor comprises: sodium silicate, sodium polyacrylate, mercaptobenzothiazole, benzotriazole, sodium tripolyphosphate, hexamethylenetetramine, imidazoline, mercaptobenzothiazole, alkylamino alcohol, furfural, polyphosphate, ethanolamine, sodium borate, and ethanol; the preparation method comprises the steps of heating mixed liquid of sodium silicate, sodium polyacrylate, mercaptobenzothiazole, benzotriazole, sodium tripolyphosphate, hexamethylenetetramine, imidazoline, mercaptobenzothiazole, alkylamino alcohol, furfural, ethanolamine and ethanol to 50-60 ℃, adding polyphosphoric acid and sodium borate, continuously heating to 85-90 ℃, preserving heat for 2-3 hours, and cooling to obtain the product. The rust-proof corrosion inhibitor has good compatibility with various materials, long rust-proof time which can reach 4-6 months, and good adaptability to copper and aluminum materials. The corrosion inhibitor has the advantages of complex preparation process, need to be heated to 85-90 ℃, more raw material types and relatively high production cost.
Disclosure of Invention
The invention aims at providing an aluminum part and aluminum alloy corrosion inhibitor applied to a weakly alkaline water-based cleaning agent, a preparation method of the slow release agent and an application of the corrosion inhibitor in the aluminum part and aluminum alloy water-based cleaning agent. The corrosion inhibitor not only can be applied to normal temperature, low temperature and high temperature, but also has good anti-corrosion and anti-oxidation effects on aluminum and aluminum alloy parts in an alkaline cleaning process, and has good compatibility and stability.
The corrosion inhibitor disclosed by the invention is prepared from the following components in parts by weight:
preferably, the corrosion inhibitor is prepared from the following components in parts by weight:
more preferably, the polyoxyethylene slow ester etchant is prepared from the following components in parts by weight:
the molecular weight of the methoxy polyethylene glycol is 1000-1500, and if the molecular weight is too high, the substance is solid and is not dissolved in water under normal conditions; the concentration of polyethylene glycol is proportional to the molecular weight, and too low can lower the self slow release effect, so the molecular weight cannot be too high or too low. The methoxy polyethylene glycol is preferably MPEG1200.
The bentonite is aluminum-based bentonite.
The pH value of the dicyclohexylamine chromate is 6.8-7.2.
The polyoxyethylene ester is a nonionic surfactant.
The preparation method of the corrosion inhibitor comprises the following steps:
(1) Firstly adding water into a reaction kettle, then adding sodium gluconate and zinc phosphate into the reaction kettle at normal temperature, and continuously stirring until the raw materials are completely and uniformly dissolved;
(2) Adding sodium tripolyphosphate, activated alumina and bentonite into the reaction kettle in the step (1), and stirring for 40-60 minutes until the sodium tripolyphosphate, the activated alumina and the bentonite are completely dissolved;
(3) Adding dicyclohexylamine chromate, monoethanolamine n-octoate, methoxypolyethylene glycol and polyoxyethylene ester into the reaction kettle in the step (2), and continuously stirring to completely dissolve the materials until the solution is clear and transparent.
The principle of the formula corrosion inhibition of the invention is as follows:
the sodium gluconate is helpful for the corrosion inhibitor to be deposited on the surface of the workpiece, so that the workpiece is not easy to corrode; the sodium tripolyphosphate enables the corrosion inhibitor to rapidly diffuse on the workpiece and promotes the film forming speed of the surface of the workpiece; zinc ions in the zinc phosphate are combined with hydroxide ions in the solution to form precipitates to be deposited on the surface of the workpiece; activated alumina, bentonite and dicyclohexylamine chromate promote the compactness of corrosion inhibition film formation on the surface of a workpiece; the solubility of each component in the solution is enhanced by the n-octanoic acid monoethanolamine, so that each component ion is adsorbed and deposited quickly to form a corrosion inhibition film; methoxy polyethylene glycol, polyoxyethylene ester: enhancing corrosion inhibition effect in the system.
The invention also provides application of the corrosion inhibitor in an aluminum piece and aluminum alloy water-based cleaning agent.
The technical scheme of the invention has the following beneficial effects:
(1) The corrosion inhibitor for the water-based cleaning agent for aluminum and aluminum alloy does not contain heavy metal ions such as nickel, manganese and the like and does not contain phosphorus element basically;
(2) The compatibility stability with the weakly alkaline cleaning agent is good;
(3) The sustained-release preparation has good sustained-release effect at normal temperature, low temperature or high temperature and good stability;
(4) After the aluminum and aluminum alloy parts are treated by adding the corrosion inhibitor water-based cleaning agent, the surface of the aluminum and aluminum alloy parts has no color change and oxidization phenomena, and no white hair and mildew points are generated;
(5) The residual liquid of the workpiece is easy to clean, and the adhesive force of the subsequent coating of the workpiece is not affected.
Detailed Description
In order to more clearly illustrate the present invention, the following examples are set forth, but they do not limit the scope of the invention in any way.
The manufacturers of the components in the examples are as follows:
example 1
The corrosion inhibitor applied to the weakly alkaline water-based cleaning agent for the aluminum and aluminum alloy parts is prepared from the following components in parts by weight:
the corrosion inhibitor in the weakly alkaline water-based cleaning agent for aluminum and aluminum alloy parts in the embodiment 1 is prepared by the following process method:
step 1, adding 75.4 parts of water into a reaction kettle, and then adding 2.0 parts of sodium gluconate and 1.5 parts of zinc phosphate into the reaction kettle at normal temperature, and continuously stirring until all the raw materials are uniformly dissolved;
step 2, adding 6.5 parts of sodium tripolyphosphate, 0.1 part of activated alumina and 0.5 part of bentonite (aluminum sulfate) into the reaction kettle in the step 1, and stirring for 40-60 minutes until the sodium tripolyphosphate, the activated alumina and the bentonite are completely dissolved;
and 3, adding 1.0 part of dicyclohexylamine chromate with the pH value of 6.8-7.2, 5.0 parts of monoethanolamine n-octoate, 5.0 parts of methoxy polyethylene glycol (molecular weight MPEG 1200) and 3.0 parts of polyoxyethylene ester into the reaction kettle in the step 2, and continuously stirring to completely dissolve until the solution is clear and transparent.
Taking out a certain amount of the aluminum and aluminum alloy corrosion inhibitor of the example 1, mixing with the weakly alkaline water-based cleaning agent according to the weight proportion of 5.0%, and marking the liquid (1) to be detected (the PH value is 9.2).
Taking the weakly alkaline water-based cleaning agent with the same weight as the liquid to be tested (1), not adding the aluminum and aluminum alloy corrosion inhibitor of the embodiment 1, and marking the liquid to be tested (2) as a blank control experiment.
The corrosion inhibition effect of the aluminum and aluminum alloy corrosion inhibitor of example 1 of the present invention on LY12 (BCZ) duralumin was measured according to national standard JB/T4323.1-1999 under normal temperature, warming and high temperature conditions.
According to national standard requirements, the weight change of duralumin in the liquid to be measured is measured by a weighing method. Subsequent coating adhesion of LY12 (BCZ) duralumin workpieces was tested.
Experimental results show that the LY12 (BCZ) duralumin in the liquid (2) to be tested has a large weight change, namely 2.85mg and more than 2.0mg; the weight change of LY12 (BCZ) hard aluminum of the liquid to be detected (1) is not less than 2.0mg; the adhesive force of the coating is more than 1 level, and the coating does not fall off and accords with the national standard. The aluminum and aluminum alloy weakly alkaline water-based cleaning agent added with the corrosion inhibitor has the advantages of no corrosion to the workpiece, bright surface cleaning, no mildew and oxidation discoloration, certain corrosion inhibition effect and certain protection effect on the workpiece.
Example 2
The corrosion inhibitor applied to the weakly alkaline water-based cleaning agent for the aluminum and aluminum alloy parts is prepared from the following components in parts by weight:
the corrosion inhibitor in the weakly alkaline water-based cleaning agent for aluminum and aluminum alloy parts in the embodiment 2 is prepared by the following process method:
step 1, adding 73.9 parts of water into a reaction kettle, and then adding 3.0 parts of sodium gluconate and 1.0 part of zinc phosphate into the reaction kettle at normal temperature, and continuously stirring until all the raw materials are uniformly dissolved;
step 2, adding 7.5 parts of sodium tripolyphosphate, 0.1 part of activated alumina and 0.5 part of bentonite (aluminum sulfate) into the reaction kettle in the step 1, and stirring for 40-60 minutes until the sodium tripolyphosphate, the activated alumina and the bentonite are completely dissolved;
and 3, adding 1.5 parts of dicyclohexylamine chromate with the pH value of 6.8-7.2, 3.0 parts of monoethanolamine n-octoate, 6.0 parts of methoxy polyethylene glycol (molecular weight MPEG 1200) and 3.5 parts of polyoxyethylene ester into the reaction kettle in the step 2, and continuously stirring to completely dissolve until the solution is clear and transparent.
Taking out a certain amount of the aluminum and aluminum alloy corrosion inhibitor of the example 2, mixing with the weakly alkaline water-based cleaning agent according to the weight proportion of 5.0%, and marking the liquid (1) to be detected (the PH value is 9.2).
Taking the weakly alkaline water-based cleaning agent with the same weight as the liquid to be tested (1), not adding the aluminum and aluminum alloy corrosion inhibitor of the embodiment 2, and marking the liquid to be tested (2) as a blank control experiment.
The method for measuring the corrosion inhibition effect is the same as that of the example 1; the weight change of LY12 (BCZ) duralumin in the liquid (2) to be detected is larger and is 2.85mg and more than 2.0mg; the weight change of LY12 (BCZ) hard aluminum of the liquid to be detected (1) is less than 2.0mg; the adhesive force of the coating is more than 1 grade.
Example 3
The corrosion inhibitor applied to the weakly alkaline water-based cleaning agent for the aluminum and aluminum alloy parts is prepared from the following components in parts by weight:
the corrosion inhibitor in the weakly alkaline water-based cleaning agent for aluminum and aluminum alloy parts in the embodiment 3 is prepared by the following process method:
step 1, adding 71.4 parts of water into a reaction kettle, and then adding 4.0 parts of sodium gluconate and 2.0 parts of zinc phosphate into the reaction kettle at normal temperature, and continuously stirring until all the raw materials are uniformly dissolved;
step 2, adding 8.0 parts of sodium tripolyphosphate, 0.1 part of activated alumina and 0.5 part of bentonite (aluminum sulfate) into the reaction kettle in the step 1, and stirring for 40-60 minutes until the sodium tripolyphosphate, the activated alumina and the bentonite are completely dissolved;
and 3, adding 2.0 parts of dicyclohexylamine chromate with the pH value of 6.8-7.2, 1.0 part of monoethanolamine n-octoate, 7.0 parts of methoxy polyethylene glycol (molecular weight MPEG 1200) and 4.0 parts of polyoxyethylene ester into the reaction kettle in the step 2, and continuously stirring to completely dissolve until the solution is clear and transparent.
Taking out a certain amount of the aluminum and aluminum alloy corrosion inhibitor of the example 3, mixing with the weakly alkaline water-based cleaning agent according to the weight proportion of 5.0%, and marking the liquid (1) to be detected (the PH value is 9.2).
Taking the weakly alkaline water-based cleaning agent with the same weight as the liquid to be tested (1), not adding the aluminum and aluminum alloy corrosion inhibitor of the embodiment 3, and marking the liquid to be tested (2) as a blank control experiment.
The same method as in example 1-2 is used for measuring the corrosion inhibition effect; the weight change of LY12 (BCZ) duralumin in the liquid (2) to be detected is larger and is 2.85mg and more than 2.0mg; the weight change of LY12 (BCZ) hard aluminum of the liquid to be detected (1) is less than 2.0mg; the adhesive force of the coating is more than 0 grade.
The preparation method of the aluminum and aluminum alloy corrosion inhibitor has the advantages of simple formula, safety and environmental protection, and the product contains no nickel-manganese heavy metal elements and no nitrite and other substances which are harmful to health; the product can not be agglomerated, precipitated or floc floating after long-term storage, has good stability, and can be used under the conditions of normal temperature and heating; the washed workpiece has no defects of mildew, discoloration and the like, and has strong washing capability; the corrosion inhibitor has good corrosion inhibition effect on aluminum and aluminum alloy workpieces in alkaline water-based cleaning agents.
Comparative example 1
Comparative example 1 the amount of activated alumina was changed to 0.6 part, and bentonite (aluminum sulfate) was not contained, and the specific formulation was as follows in example 3:
the corrosion inhibitor in the slightly alkaline water-based cleaning agent for the aluminum and aluminum alloy parts in comparative example 1 is prepared by the following process method:
step 1, adding 71.4 parts of water into a reaction kettle, and then adding 4.0 parts of sodium gluconate and 2.0 parts of zinc phosphate into the reaction kettle at normal temperature, and continuously stirring until all the raw materials are uniformly dissolved;
step 2, adding 8.0 parts of sodium tripolyphosphate and 0.6 part of activated alumina into the reaction kettle in the step 1, and stirring for 40-60 minutes until the sodium tripolyphosphate and the activated alumina are completely dissolved;
and 3, adding 2.0 parts of dicyclohexylamine chromate with the pH value of 6.8-7.2, 1.0 part of monoethanolamine n-octoate, 7.0 parts of methoxy polyethylene glycol (molecular weight MPEG 1200) and 4.0 parts of polyoxyethylene ester into the reaction kettle in the step 2, and continuously stirring to completely dissolve until the solution is clear and transparent.
Taking out a certain amount of the aluminum and aluminum alloy corrosion inhibitor of the comparative example 1, mixing with the weakly alkaline water-based cleaning agent according to the weight proportion of 5.0%, and marking the liquid (1) to be detected (the PH value is 9.2).
Taking the weakly alkaline water-based cleaning agent with the same weight as the liquid to be tested (1), not adding the aluminum and aluminum alloy corrosion inhibitor of the comparative example 1, and marking the liquid to be tested (2) as a blank control experiment.
The same method as in examples 1-3 for measuring the corrosion inhibition effect; the weight change of LY12 (BCZ) duralumin in the liquid (2) to be detected is larger and is 2.85mg and more than 2.0mg; the weight of the liquid to be tested (1) LY12 (BCZ) duralumin is 2.6mg; the coating adhesive force is less than 0 level, and the coating adhesive force is more than one level.
Comparative example 2
Comparative example 2 bentonite (aluminium sulphate) was used in an amount of 0.6 part, without active alumina, with the following specific formulation, as in example 3:
the corrosion inhibitor in the weakly alkaline water-based cleaning agent for the aluminum and aluminum alloy parts in comparative example 2 is prepared by the following process method:
step 1, adding 71.4 parts of water into a reaction kettle, and then adding 4.0 parts of sodium gluconate and 2.0 parts of zinc phosphate into the reaction kettle at normal temperature, and continuously stirring until all the raw materials are uniformly dissolved;
step 2, adding 8.0 parts of sodium tripolyphosphate and 0.6 part of bentonite (aluminum sulfate) into the reaction kettle in the step 1, and stirring for 40-60 minutes until the sodium tripolyphosphate and the bentonite are completely dissolved;
and 3, adding 2.0 parts of dicyclohexylamine chromate with the pH value of 6.8-7.2, 1.0 part of monoethanolamine n-octoate, 7.0 parts of methoxy polyethylene glycol (molecular weight MPEG 1200) and 4.0 parts of polyoxyethylene ester into the reaction kettle in the step 2, and continuously stirring to completely dissolve until the solution is clear and transparent.
Taking out a certain amount of the aluminum and aluminum alloy corrosion inhibitor of the comparative example 1, mixing with the weakly alkaline water-based cleaning agent according to the weight proportion of 5.0%, and marking the liquid (1) to be detected (the PH value is 9.2).
And taking the weakly alkaline water-based cleaning agent with the same weight as the liquid to be tested (1), not adding the aluminum and aluminum alloy corrosion inhibitor of the comparison 2, and marking the liquid to be tested (2) as a blank control experiment.
The same method as in examples 1-3 for measuring the corrosion inhibition effect; the weight change of LY12 (BCZ) duralumin in the liquid (2) to be detected is larger and is 2.85mg and more than 2.0mg; the weight of the liquid to be tested (1) LY12 (BCZ) duralumin is 2.5mg; the coating adhesive force is less than 0 level, and the coating adhesive force is more than one level.
It can be seen from comparative examples 1-2 that bentonite (aluminum sulfate) and activated alumina have a synergistic effect in corrosion inhibition performance in the formulation system of the present application.
Claims (8)
1. The corrosion inhibitor is characterized by being prepared from the following components in parts by weight: 1.0 to 4.0 parts of sodium gluconate, 0.5 to 2.0 parts of zinc phosphate, 6.0 to 9.0 parts of sodium tripolyphosphate, 0.1 to 0.2 parts of active alumina, 0.5 to 1.0 part of bentonite, 1.0 to 2.0 parts of dicyclohexylamine chromate, 1.0 to 5.0 parts of monoethanolamine n-octoate, 5.0 to 7.0 parts of methoxypolyethylene glycol, 3.0 to 4.0 parts of polyoxyethylene ester and 65.8 to 81.9 parts of water.
2. The corrosion inhibitor according to claim 1, wherein the methoxypolyethylene glycol has a molecular weight of 1000 to 1500.
3. The corrosion inhibitor according to claim 1, wherein the bentonite is an aluminum-based bentonite.
4. The corrosion inhibitor according to claim 1, wherein said methoxypolyethylene glycol is preferably MPEG1200.
5. The corrosion inhibitor according to claim 1, which is prepared from the following components in parts by weight: the corrosion inhibitor is prepared from the following components in parts by weight: 2.0 to 4.0 parts of sodium gluconate, 0.5 to 2.0 parts of zinc phosphate, 6.0 to 9.0 parts of sodium tripolyphosphate, 0.1 to 0.2 parts of active alumina, 0.5 to 1.0 part of bentonite, 1.0 to 2.0 parts of dicyclohexylamine chromate, 1.0 to 5.0 parts of monoethanolamine n-octoate, 5.0 to 7.0 parts of methoxypolyethylene glycol, 3.0 to 4.0 parts of polyoxyethylene ester and 70 to 80 parts of water.
6. The corrosion inhibitor according to claim 1, which is prepared from the following components in parts by weight: 4.0 parts of sodium gluconate, 2.0 parts of zinc phosphate, 8.0 parts of sodium tripolyphosphate, 0.1 part of activated alumina, 0.5 part of bentonite, 2.0 parts of dicyclohexylamine chromate, 1.0 part of monoethanolamine n-octoate, 7.0 parts of methoxypolyethylene glycol, 4.0 parts of polyoxyethylene ester and 71.4 parts of water.
7. The method for preparing the corrosion inhibitor according to claim 1, comprising the following steps in order:
(1) Firstly adding water into a reaction kettle, then adding sodium gluconate and zinc phosphate into the reaction kettle at normal temperature, and continuously stirring until the raw materials are completely and uniformly dissolved;
(2) Adding sodium tripolyphosphate, activated alumina and bentonite into the reaction kettle in the step (1), and stirring for 40-60 minutes until the sodium tripolyphosphate, the activated alumina and the bentonite are completely dissolved;
(3) Adding dicyclohexylamine chromate, monoethanolamine n-octoate, methoxypolyethylene glycol and polyoxyethylene ester into the reaction kettle in the step (2), and continuously stirring to completely dissolve the materials until the solution is clear and transparent.
8. The use of the corrosion inhibitor according to claim 1 in water-based cleaning agents for aluminum parts and aluminum alloys.
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