CN113802125A - Liquid tank interior cleaning, derusting and rust preventing treatment process - Google Patents
Liquid tank interior cleaning, derusting and rust preventing treatment process Download PDFInfo
- Publication number
- CN113802125A CN113802125A CN202111107400.9A CN202111107400A CN113802125A CN 113802125 A CN113802125 A CN 113802125A CN 202111107400 A CN202111107400 A CN 202111107400A CN 113802125 A CN113802125 A CN 113802125A
- Authority
- CN
- China
- Prior art keywords
- liquid tank
- rust
- corrosion inhibitor
- interior
- inhibitor solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 161
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 238000004140 cleaning Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000007797 corrosion Effects 0.000 claims abstract description 85
- 238000005260 corrosion Methods 0.000 claims abstract description 85
- 239000003112 inhibitor Substances 0.000 claims abstract description 73
- 239000000243 solution Substances 0.000 claims abstract description 70
- 238000005507 spraying Methods 0.000 claims abstract description 36
- 239000002699 waste material Substances 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 7
- 238000002347 injection Methods 0.000 claims abstract description 5
- 239000007924 injection Substances 0.000 claims abstract description 5
- 238000001179 sorption measurement Methods 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000002161 passivation Methods 0.000 claims description 14
- 239000010935 stainless steel Substances 0.000 claims description 7
- 229910001220 stainless steel Inorganic materials 0.000 claims description 7
- 239000011261 inert gas Substances 0.000 claims description 6
- 238000005201 scrubbing Methods 0.000 claims description 6
- 238000000227 grinding Methods 0.000 claims description 5
- 230000000295 complement effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 12
- 239000003344 environmental pollutant Substances 0.000 abstract description 11
- 231100000719 pollutant Toxicity 0.000 abstract description 11
- 239000007769 metal material Substances 0.000 abstract description 6
- 230000003647 oxidation Effects 0.000 abstract description 6
- 238000007254 oxidation reaction Methods 0.000 abstract description 6
- 239000000428 dust Substances 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 description 16
- 239000010959 steel Substances 0.000 description 16
- 239000000463 material Substances 0.000 description 15
- 239000012530 fluid Substances 0.000 description 9
- 238000005498 polishing Methods 0.000 description 9
- 230000002265 prevention Effects 0.000 description 8
- 238000003466 welding Methods 0.000 description 7
- 239000002585 base Substances 0.000 description 6
- 230000007547 defect Effects 0.000 description 5
- 210000001503 joint Anatomy 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000011010 flushing procedure Methods 0.000 description 4
- 230000002262 irrigation Effects 0.000 description 4
- 238000003973 irrigation Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 description 2
- 150000002894 organic compounds Chemical class 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 238000011179 visual inspection Methods 0.000 description 2
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical group ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000010290 biphenyl Nutrition 0.000 description 1
- 150000004074 biphenyls Chemical class 0.000 description 1
- 239000001273 butane Substances 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- USIUVYZYUHIAEV-UHFFFAOYSA-N diphenyl ether Chemical class C=1C=CC=CC=1OC1=CC=CC=C1 USIUVYZYUHIAEV-UHFFFAOYSA-N 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012458 free base Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 125000001165 hydrophobic group Chemical group 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 1
- 239000002120 nanofilm Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-L phthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC=C1C([O-])=O XNGIFLGASWRNHJ-UHFFFAOYSA-L 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Images
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
-
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
-
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
- C23C22/76—Applying the liquid by spraying
-
- 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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/82—After-treatment
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Preventing Corrosion Or Incrustation Of Metals (AREA)
Abstract
The invention relates to the technical field of liquid tanks, in particular to a process for cleaning, derusting and rust-proof treatment of the interior of a liquid tank. The process for cleaning, derusting and rust preventing treatment of the interior of the liquid tank comprises the following steps: preparing a corrosion inhibitor solution, spraying the corrosion inhibitor solution to the surface pressure of the internal structure of the liquid tank, extracting the waste liquid in the liquid tank after the spraying is finished, and cleaning and drying the interior of the liquid tank. The pressure injection does not generate a large amount of dust, so that the safety risk in the rust removing process is reduced, and the safe operation of constructors is facilitated; the corrosion inhibitor can generate a compact oxidation film on the surface of the metal material in a short time, so that the corrosion speed of the metal material is obviously reduced, and the corrosion inhibitor solution is used for spraying the surface of the internal structure of the liquid tank under pressure, so that the compact oxidation film can be generated on the surface of the internal structure of the liquid tank after removing pollutants such as rust, oxide skin and the like on the surface of the internal structure of the liquid tank, the corrosion speed of the surface of the internal structure of the liquid tank is reduced, and the surface of the internal structure of the liquid tank obtains a better antirust effect.
Description
Technical Field
The invention relates to the technical field of liquid tanks, in particular to a process for cleaning, derusting and rust-proof treatment of the interior of a liquid tank.
Background
In the construction process of the liquid tank, a steel plate used as a manufacturing material is not protected by workshop primer after pretreatment, the manufacturing period of the liquid tank is as long as 9 months, the interior of the liquid tank is seriously rusted by wind, rain and rain for a long period, and the interior of the liquid tank needs to be cleaned, derusted and subjected to rust prevention before being put into operation and use; after the liquid tank is put into operation, the temperature in the liquid tank is as low as-168 ℃, and the common coating cannot meet the low-temperature circulation requirement.
The conventional treatment scheme is that constructors enter the tank and polish and remove rust through a power tool, and dry air or inert gas is continuously injected into the liquid tank after purging and cleaning so as to slow down the corrosion rate inside the liquid tank and keep the inside of the liquid tank in a clean and rust-free state. On one hand, potential safety hazards exist in the construction inside the liquid tank, a large amount of dust is generated during polishing and derusting, and constructors are placed in a closed space with only one inlet and outlet, so that safety accidents are easily caused; on the other hand, constructors which can be accommodated in the tank are limited, and the working period of polishing and derusting is long. Meanwhile, the rust removal difficulty of parts such as the scaffold, the pipeline, the outfitting and the like is high, and the parts which have been subjected to rust removal are easy to rust again due to improper environment in the tank in the construction process.
Disclosure of Invention
The invention aims to solve the technical problem of providing a cleaning, derusting and rust-preventing treatment process for the interior of a liquid tank, which has low safety risk, short working period and good derusting and rust-preventing effects, so as to overcome the defects in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
the invention provides a process for cleaning, derusting and rust-preventing the interior of a liquid tank, which comprises the steps of preparing a corrosion inhibitor solution, spraying the corrosion inhibitor solution to the surface pressure of the internal structure of the liquid tank, extracting waste liquid in the liquid tank after the spraying is finished, and cleaning and drying the interior of the liquid tank.
Preferably, before the corrosion inhibitor solution is sprayed on the surface of the internal structure of the liquid tank under pressure, batch-supplement grinding and/or stainless steel passivation treatment is carried out on outfitting parts inside the liquid tank.
Preferably, the interior of the tank is cleaned prior to pressure spraying the corrosion inhibitor solution onto the surface of the internal structure of the tank.
Preferably, the corrosion inhibitor solution is an adsorption film type organic corrosion inhibitor solution.
Preferably, the corrosion inhibitor solution is sprayed by using the pressure of a water pump, and the working pressure of the water pump is 2000bar-2500 bar.
Preferably, the time for pressure spraying the corrosion inhibitor solution to the same position on the surface of the internal structure of the tank is not less than one minute.
Preferably, the pressure spraying of the corrosion inhibitor solution onto the surface of the internal structure of the tank is carried out in two times: firstly, spraying a corrosion inhibitor solution to the surface pressure of the upper structure in the liquid tank, and extracting waste liquid in the liquid tank after the spraying is finished; and then spraying the corrosion inhibitor solution to the surface pressure of the lower structure in the liquid tank.
Preferably, after the extraction liquid is injected into the waste liquid, the surface local rust returning area and the area which is not flushed in place of the internal structure of the liquid tank are subjected to rust removing treatment.
Preferably, the rust removing treatment includes a sanding treatment and a scrubbing corrosion inhibitor solution.
Preferably, after the inside of the tank is subjected to the cleaning and drying treatment, dry air or inert gas is injected into the inside of the tank, and then the tank is sealed.
Compared with the prior art, the invention has the remarkable progress that:
the pressure injection does not generate a large amount of dust, so that the safety risk in the rust removing process is reduced, and the safe operation of constructors is facilitated; the pressure jet can directly remove pollutants such as rust, oxide skin and the like at the flushing position, the working efficiency of polishing and rust removal of a conventional power tool is obviously improved, the working period is shortened, and the rust removal effect is good; the corrosion inhibitor can generate a compact oxidation film on the surface of the metal material in a short time, so that the corrosion speed of the metal material is obviously reduced, and the corrosion inhibitor solution is used for spraying the surface of the internal structure of the liquid tank under pressure, so that the compact oxidation film can be generated on the surface of the internal structure of the liquid tank after removing pollutants such as rust, oxide skin and the like on the surface of the internal structure of the liquid tank, the corrosion speed of the surface of the internal structure of the liquid tank is reduced, and the surface of the internal structure of the liquid tank obtains a better antirust effect.
Drawings
Fig. 1 is a schematic flow chart of a cleaning, rust removing and rust preventing treatment process for the interior of a liquid tank in the embodiment.
Fig. 2 is a table showing the analysis of the working efficiency of the rust removing cleaning and preventing process performed inside the liquid tank in this embodiment.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and are not intended to limit the present invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 1, an embodiment of the cleaning, rust removing and rust preventing treatment process for the interior of the liquid tank of the present invention is as follows: preparing a corrosion inhibitor solution, spraying the corrosion inhibitor solution to the surface pressure of the internal structure of the liquid tank, wherein the surface of the internal structure of the liquid tank comprises the inner wall surface of the liquid tank and the outer surface of a structural component (such as an outfitting piece, a pipeline and the like) arranged in the liquid tank, extracting waste liquid in the liquid tank after spraying is finished, and cleaning and drying the interior of the liquid tank. The pressure injection does not generate a large amount of dust, so that the safety risk in the rust removing process is reduced, and the safe operation of constructors is facilitated; the pressure jet can directly remove pollutants such as rust, oxide skin and the like at the flushing position, the working efficiency of polishing and rust removal of a conventional power tool is obviously improved, the working period is shortened, and the rust removal effect is good; the corrosion inhibitor can generate a compact oxidation film on the surface of the metal material in a short time, so that the corrosion speed of the metal material is obviously reduced, and the corrosion inhibitor solution is used for spraying the surface of the internal structure of the liquid tank under pressure, so that the compact oxidation film can be generated on the surface of the internal structure of the liquid tank after removing pollutants such as rust, oxide skin and the like on the surface of the internal structure of the liquid tank, the corrosion speed of the surface of the internal structure of the liquid tank is reduced, and the surface of the internal structure of the liquid tank obtains a better antirust effect.
Preferably, before the corrosion inhibitor solution is sprayed on the surface of the internal structure of the liquid tank under pressure, batch-supplement grinding and/or stainless steel passivation treatment is carried out on outfitting parts inside the liquid tank. The batch-supplementing grinding can remove pollutants such as surface oxidation layers, dirt, oil stains and the like, repair outfitting parts and ensure that the outfitting parts can be normally used; the stainless steel passivation treatment can enable the outfitting to be treated by an oxidizing medium, so that a layer of compact passivation film is generated on the surface of the outfitting, and the outfitting can obtain a better corrosion resistance effect.
Preferably, in this embodiment, the outfitting inside the liquid tank is ground in batches, and then the outfitting inside the liquid tank is passivated with stainless steel.
Preferably, the interior of the tank is cleaned prior to pressure spraying the corrosion inhibitor solution onto the surface of the internal structure of the tank. The inside pollutant that easily gets rid of the fluid reservoir of can getting rid of cleaning process to fluid reservoir inside also can make the inside difficult pollutant of getting rid of fluid reservoir not hard up, is favorable to improving efficiency and quality that follow-up corrosion inhibitor solution pressure sprays the rust cleaning, shortens duty cycle, improves the rust cleaning effect on the surface of fluid reservoir inner structure.
Preferably, in this embodiment, before the batch polishing and/or the stainless steel passivation treatment are performed on the outfitting inside the tank, the inside of the tank is cleaned. Specifically, the inside cleaning treatment of the fluid reservoir is to firstly pump water and clean the inside of the fluid reservoir and then ventilate and dehumidify the inside of the fluid reservoir.
Preferably, the corrosion inhibitor solution is an adsorption film type organic corrosion inhibitor solution. The synthesized organic compound molecules in the adsorption film type organic corrosion inhibitor solution are quickly adsorbed with active groups, charges, hydroxyl groups and the like on the surface of the internal structure of the liquid tank in the pressure spraying process, finally a monomolecular layer is formed on the surface of the internal structure of the liquid tank, the organic compound molecules also contain hydrophobic groups, a layer of compact hydrophobic molecular film can be formed in the anode and cathode areas of the steel plate substrate of the fluid tank, so that the rust prevention treatment inside the fluid tank is realized, and because the rust prevention of the adsorption film type organic corrosion inhibitor solution is realized by physical adsorption, the material properties of carbon steel, 5NI steel and 9Ni steel which are used as the base materials of the liquid tank are not influenced, the adsorption film type organic corrosion inhibitor solution does not generate chemical reaction with three kinds of steel, does not corrode the three kinds of steel, therefore, the material performance of the surface of the internal structure of the liquid tank is not changed, and the material of the surface of the internal structure of the liquid tank does not generate chemical reaction or generate corrosion phenomenon.
Preferably, in this embodiment, the concentration ratio of the solution of the adsorption film type organic corrosion inhibitor is 0.5% -2%. The content of chloride ions of the adsorption film type organic corrosion inhibitor solution with the concentration ratio is less than 50ppm, the PH value is 6.8-8, the adsorption film type organic corrosion inhibitor solution with the concentration ratio does not have any chemical reaction with methane, ethylene, ethane, propane, propylene, butane, ammonia, chloroethylene, butadiene, butane series and butylene series under normal temperature and normal pressure, and only a physical shielding layer is formed on the surface of the internal structure of the liquid tank to isolate water and oxygen and prevent corrosion; the test results of cadmium, lead, mercury, hexavalent chromium, polybrominated biphenyls (PBBs), polybrominated diphenyl ethers, phthalate (such as DBP) BBP and the like in the adsorption film type organic corrosion inhibitor solution with the concentration ratio meet the limit requirements of a correction instruction (EU)2015/863 of EU R0HS instruction 2011/65/EU appendix II, and the waste liquid generated after the adsorption film type organic corrosion inhibitor solution with the concentration ratio is used for carrying out pressure spraying on the surface of the internal structure of the liquid tank meets the third-level standard of the discharge limit of the second-class pollutants of a comprehensive sewage discharge standard (DB31/199 and 2018), so that the adsorption film type organic corrosion inhibitor solution is beneficial to environmental protection.
Further, in this embodiment, the concentration ratio of the corrosion inhibitor solution is 1% to 2%. The corrosion inhibitor solution with the concentration ratio of 1-2% can effectively prevent the interior of the liquid tank from rusting back, and the surface passivation layer has no obvious influence on the liquid tank, so that the safety and reliability of the liquid tank in subsequent use are ensured.
Specifically, in this embodiment, a sample plate can be made to perform a 1% -2% concentration ratio corrosion inhibitor solution immersion corrosion test, and in order to prevent the weld inside the liquid tank from being damaged, the immersed corrosion inhibitor solution must simultaneously satisfy the welding evaluation of two types of weld joints (submerged arc welding butt joint and welding rod welding fillet weld) of three types of steel materials, namely carbon steel, 9NI steel and 5NI steel, which are used as the base materials of the liquid tank, and satisfy the following four requirements:
a. visual inspection requirements: the comparison test of welding before and after passivation of three kinds of steel materials shows that the fillet weld and the submerged arc butt joint have good molding states, and the surfaces of the weld joints of the passivation base material and the comparison base material have no visible defects such as air holes, cracks and the like;
b. nondestructive testing requirements: nondestructive inspection is carried out on three kinds of steel materials before and after passivation, the evaluation standard refers to the quality classification of the defects of a welded joint (except beam welding) of steel, nickel, titanium and alloy thereof welded by ISO 5817-;
c. metallographic structure analysis requirements: the weld joints and the heat affected zones of the three steels before and after passivation have no cracks, fusion or other defects;
d. the mechanical property detection requirement is as follows: the mechanical properties of the three steel materials before and after passivation, including fracture, stretching, impact and bending, are detected, and the overproof defects are not detected, and the mechanical properties of the welding seam meet the standard requirements.
Finally, the corrosion inhibitor solution with the concentration ratio of 1-2% can effectively prevent the steel plate from rusting back, and the surface passivation layer has no obvious influence on the steel plate base material.
Preferably, the corrosion inhibitor solution is sprayed by using the pressure of a water pump, and the working pressure of the water pump is 2000bar-2500 bar. The working pressure of 2000-2500 bar is used for pressure spraying, so that pollutants such as rust, oxide skin and the like on the surface of the internal structure of the liquid tank can be removed well, a good rust removing and cleaning effect in the liquid tank is obtained, and the energy conservation and environmental protection are facilitated without using higher working pressure for pressure washing.
Specifically, a sample plate is manufactured to carry out a corrosion inhibitor solution pressure washing derusting test, and by means of derusting visual inspection, aqueous solution chemical component analysis, sample plate metallographic structure analysis and the like, the method is obtained that pollutants such as rust, oxide skin and the like on the surface of the liquid tank base material can be completely removed by carrying out pressure washing with the working pressure of more than 2000bar, and the clean and pollution-free base material surface is obtained.
Preferably, in this embodiment, for construction convenience, the output end of the water pump may adopt a handheld high-pressure water gun to perform pressure injection, and it should be noted that the output end of the water pump is not specified, and other devices or tools may also be selected according to actual situations.
Preferably, the time for pressure spraying the corrosion inhibitor solution to the same position on the surface of the internal structure of the tank is not less than one minute. The quality of a compact oxide film generated on the surface of the internal structure of the liquid tank can be improved by more than one minute at the same position of the surface of the internal structure of the corrosion inhibitor solution pressure flushing liquid tank, and the rust prevention effect of the surface of the internal structure of the liquid tank after cleaning, rust removal and rust prevention treatment is enhanced.
Preferably, the pressure spraying of the corrosion inhibitor solution onto the surface of the internal structure of the tank is carried out in two times: firstly, spraying a corrosion inhibitor solution to the surface pressure of the upper structure in the liquid tank, and extracting waste liquid in the liquid tank after the spraying is finished; and then spraying the corrosion inhibitor solution to the surface pressure of the lower structure in the liquid tank. It should be noted that in the spray rust removal process, a working platform can be set up according to the actual situation on site, and the spray rust removal operation is completed before the spray rust removal operation is completed.
Preferably, after the extract liquid is injected into the waste liquid, the surface local rust returning area and the non-flushing area of the internal structure of the liquid tank are subjected to rust removal treatment, so that the rust removal effect of the surface of the internal structure of the liquid tank is improved.
Preferably, in the embodiment, after the corrosion inhibitor solution is sprayed to the surface pressure of the upper structure in the liquid tank and the waste liquid in the liquid tank is extracted after the spraying is finished, the rust removing treatment is performed on the local rust returning area and the area which is not washed in place on the surface of the upper structure in the liquid tank; after the corrosion inhibitor solution is sprayed on the surface of the lower structure in the liquid tank under pressure, and waste liquid in the liquid tank is pumped out, the local rust returning area and the area which is not washed in place on the surface of the lower structure in the liquid tank are subjected to rust removal treatment.
Preferably, the rust removing treatment includes a sanding treatment and a scrubbing corrosion inhibitor solution. Because the local back-rusting area of the surface of the internal structure of the liquid tank and the area which is not washed in place are smaller and more dispersed, the mode of polishing and scrubbing the corrosion inhibitor solution is adopted to remove rust more conveniently and quickly, and the working period is favorably shortened.
Preferably, after the inside of the tank is subjected to the cleaning and drying treatment, dry air or inert gas is injected into the inside of the tank, and then the tank is sealed. The dry air or inert gas is injected into the liquid tank, so that the corrosion rate in the liquid tank can be slowed down, the interior of the liquid tank is kept in a clean and rustless state, and the rust removing effect on the surface of the internal structure of the liquid tank is further enhanced.
Referring to fig. 1, in a specific embodiment, the cleaning, derusting and rust-proof treatment process for the interior of the liquid tank of the embodiment may be implemented by sequentially including the following steps.
Step S1: preparing an adsorption film type organic corrosion inhibitor solution, wherein the concentration ratio of the adsorption film type organic corrosion inhibitor solution is 1% -2%, the content of chloride ions is less than 50ppm, and the PH value is 6.8-8.
Step S2: and pumping water to clean the interior of the liquid tank.
Step S3: and ventilating and dehumidifying the interior of the liquid tank.
Step S4: and (5) performing batch-up grinding on the outfitting parts in the liquid tank.
Step S5: and (4) carrying out stainless steel passivation treatment on the outfitting parts in the liquid tank.
Step S6: and (2) spraying the adsorption film type organic corrosion inhibitor solution to the surface of the upper structure in the liquid tank by using a water pump at a working pressure of 2000-2500 bar through a handheld high-pressure water gun, wherein the time for spraying the adsorption film type organic corrosion inhibitor solution to the same position on the surface of the upper structure in the liquid tank under pressure is not less than one minute. According to the inside actual conditions of liquid irrigation, in order to spray and wash the surface of the liquid irrigation top structure conveniently, a scaffold can be set up in the liquid irrigation to allow an operator to climb on the scaffold to perform pressure spraying on the surface of the liquid irrigation top structure to adsorb the film type organic corrosion inhibitor solution.
Step S7: the extract liquid fills the waste liquid in the tank.
Step S8: and carrying out rust removal treatment on a local rust return area and an unwashed area of the surface of the upper structure in the liquid tank, wherein the rust removal treatment comprises polishing treatment and scrubbing of an adsorption film type organic corrosion inhibitor solution. When the scaffold is erected, the scaffold can be dismantled after the derusting treatment is completed on the surface local rust returning area and the area which is not washed in place of the upper structure in the liquid tank.
Step S9: and (2) spraying the adsorption film type organic corrosion inhibitor solution to the surface of the lower part structure in the liquid tank by using a water pump at a working pressure of 2000-2500 bar through a handheld high-pressure water gun, wherein the time for spraying the adsorption film type organic corrosion inhibitor solution to the same position of the surface of the upper part structure in the liquid tank under pressure is not less than one minute.
Step S10: the extract liquid fills the waste liquid in the tank.
Step S11: and carrying out rust removal treatment on a local rust return area and an unwashed area of the surface of the lower structure in the liquid tank, wherein the rust removal treatment comprises polishing treatment and scrubbing of an adsorption film type organic corrosion inhibitor solution.
Step S12: and cleaning and drying the interior of the liquid tank.
Step S13: and injecting dry air or inert gas into the liquid tank, and then sealing the liquid tank.
And thus, completing the cleaning, derusting and rust preventing treatment of the interior of the liquid tank once.
Referring to FIG. 2, the capacity is 4000m3When the inside of the LNG liquid tank is subjected to rust removal and prevention, the working hours can be shortened by 1032h and the working period can be saved by adopting the cleaning, rust removal and prevention treatment process for the inside of the liquid tank of the embodiment compared with the conventional manual polishing, rust removal, cleaning and prevention treatment process.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. A cleaning, rust removing and rust preventing treatment process for the interior of a liquid tank is characterized in that a corrosion inhibitor solution is prepared, the corrosion inhibitor solution is sprayed to the surface pressure of the internal structure of the liquid tank, waste liquid in the liquid tank is extracted after the spraying is finished, and the interior of the liquid tank is cleaned and dried.
2. The process for cleaning, derusting and rust preventing inside a liquid tank as claimed in claim 1, wherein before the corrosion inhibitor solution is injected to the surface of the structure inside the liquid tank under pressure, the fitting-out parts inside the liquid tank are subjected to batch complement grinding and/or stainless steel passivation.
3. The process for cleaning, rust removing and rust preventing the interior of a liquid tank as claimed in claim 1, wherein the interior of the liquid tank is cleaned before the corrosion inhibitor solution is sprayed to the surface of the internal structure of the liquid tank under pressure.
4. The process for cleaning, derusting and rust-preventing the interior of a liquid tank as claimed in claim 1, wherein the corrosion inhibitor solution is an adsorption film type organic corrosion inhibitor solution.
5. The process for cleaning, derusting and rust preventing treatment of the interior of a liquid tank as claimed in claim 1, wherein the corrosion inhibitor solution is sprayed by a water pump under pressure, and the working pressure of the water pump is 2000bar-2500 bar.
6. The process for cleaning, derusting and rust-preventing the interior of a liquid tank as claimed in claim 1, wherein the time for pressure spraying the corrosion inhibitor solution to the same position on the surface of the internal structure of the liquid tank is not less than one minute.
7. The process for cleaning, derusting and rust-preventing the interior of a liquid tank as claimed in claim 1, wherein the spraying of the corrosion inhibitor solution to the surface pressure of the internal structure of the liquid tank is carried out in two times: firstly, spraying the corrosion inhibitor solution to the surface pressure of the upper structure in the liquid tank, and extracting the waste liquid in the liquid tank after the spraying is finished; and then spraying the corrosion inhibitor solution to the surface pressure of the lower structure in the liquid tank.
8. The process for cleaning, derusting and rust preventing the interior of a liquid tank as claimed in claim 1, wherein after the injection of the waste liquid in the interior of the liquid tank, the surface of the internal structure of the liquid tank is subjected to a rust removing treatment in a local rust return area and an area which is not flushed in place.
9. The process for cleaning and rust-removing and rust-preventing the interior of a liquid tank as claimed in claim 8, wherein the rust-removing treatment comprises a rubbing treatment and scrubbing of the corrosion inhibitor solution.
10. The process for cleaning and rust-removing and rust-preventing the interior of a liquid tank according to claim 1, wherein after the interior of the liquid tank is subjected to cleaning and drying treatment, dry air or inert gas is injected into the interior of the liquid tank, and then the liquid tank is sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111107400.9A CN113802125A (en) | 2021-09-22 | 2021-09-22 | Liquid tank interior cleaning, derusting and rust preventing treatment process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111107400.9A CN113802125A (en) | 2021-09-22 | 2021-09-22 | Liquid tank interior cleaning, derusting and rust preventing treatment process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113802125A true CN113802125A (en) | 2021-12-17 |
Family
ID=78939906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111107400.9A Pending CN113802125A (en) | 2021-09-22 | 2021-09-22 | Liquid tank interior cleaning, derusting and rust preventing treatment process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113802125A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1433487A (en) * | 1972-12-18 | 1976-04-28 | K B Antipollution Ltd | Cleaning of storage tanks |
| DE2720246A1 (en) * | 1977-05-05 | 1978-11-16 | Kue Engineering Ltd | Metal surface cleaning process - using pressurised fluid jet contg. water, abradant and corrosion inhibitor |
| CN106311577A (en) * | 2016-10-30 | 2017-01-11 | 秦皇岛首秦金属材料有限公司 | Online rust removal and corrosion resisting method for inner wall of high pressure water scale removal power storing tank |
| CN106392892A (en) * | 2016-10-25 | 2017-02-15 | 华油天然气广安有限公司 | Rust removal device of high-pressure spray gun and rotproof and rust removal method with same |
| CN108993846A (en) * | 2018-09-12 | 2018-12-14 | 石家庄金丰专用车有限公司 | A kind of spraying method of semitrailer vehicle body |
| CN111304665A (en) * | 2019-10-18 | 2020-06-19 | 广东莱雅新化工科技有限公司 | Rust removing and preventing agent |
| US20200262030A1 (en) * | 2013-03-07 | 2020-08-20 | MMLJ, Inc. | Rust Inhibiting System and Method of Use |
-
2021
- 2021-09-22 CN CN202111107400.9A patent/CN113802125A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1433487A (en) * | 1972-12-18 | 1976-04-28 | K B Antipollution Ltd | Cleaning of storage tanks |
| DE2720246A1 (en) * | 1977-05-05 | 1978-11-16 | Kue Engineering Ltd | Metal surface cleaning process - using pressurised fluid jet contg. water, abradant and corrosion inhibitor |
| US20200262030A1 (en) * | 2013-03-07 | 2020-08-20 | MMLJ, Inc. | Rust Inhibiting System and Method of Use |
| CN106392892A (en) * | 2016-10-25 | 2017-02-15 | 华油天然气广安有限公司 | Rust removal device of high-pressure spray gun and rotproof and rust removal method with same |
| CN106311577A (en) * | 2016-10-30 | 2017-01-11 | 秦皇岛首秦金属材料有限公司 | Online rust removal and corrosion resisting method for inner wall of high pressure water scale removal power storing tank |
| CN108993846A (en) * | 2018-09-12 | 2018-12-14 | 石家庄金丰专用车有限公司 | A kind of spraying method of semitrailer vehicle body |
| CN111304665A (en) * | 2019-10-18 | 2020-06-19 | 广东莱雅新化工科技有限公司 | Rust removing and preventing agent |
Non-Patent Citations (1)
| Title |
|---|
| 陈开勋等: "《精细化工产品化学及应用》", 中国石油大学出版社, pages: 147 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101949018B (en) | Multi-functional metal surface pretreatment solution and preparation method thereof | |
| KR101330478B1 (en) | Surface treatment apparatus | |
| CN111661504B (en) | Anti-corrosion oil tank and production method thereof | |
| JP4804209B2 (en) | High durability repair painting method | |
| CN104213112A (en) | Method for manufacturing metal surface self-cleaning high-protection film | |
| CN101932794A (en) | Method of regenerating gas turbine blade and gas turbine blade regenerating apparatus | |
| CN104609088B (en) | A kind of manufacture method of the well for storage device storing special gas | |
| CN104743083A (en) | Cleaning device for wall-climbing robot | |
| CN105478330A (en) | Ship coating technology | |
| CN106994436A (en) | A kind of coating process that aqueous anticorrosion coat is prepared based on single track thick film technology | |
| CN113802125A (en) | Liquid tank interior cleaning, derusting and rust preventing treatment process | |
| Chico et al. | The effects of soluble salts at the metal/paint interface: advances in knowledge | |
| CN105944945A (en) | Polyurea elastomer spraying type anticorrosion construction method for steel structure | |
| CN103361664A (en) | Cleaning method of carbon steel pipeline and cleaning agents | |
| Du et al. | Corrosion behavior and characteristics of the product film of API X100 steel in acidic simulated soil solution | |
| CN204717162U (en) | A kind of helix gas drainage pipe being provided with epoxy resin layer | |
| CN110314833A (en) | A kind of inner wall of oil tank anti-corrosion spray method | |
| CN104487183B (en) | It is provided to the metal material material cleaning device of drawing machine | |
| CN104930269A (en) | Spiral gas drainage pipe provided with epoxy resin layer and machining method thereof | |
| JP4320023B2 (en) | Metal surface treatment aqueous solution and metal surface treatment method using the aqueous solution | |
| CN105413984B (en) | A kind of means of defence for improving ammonia water tank service life | |
| RU2241742C1 (en) | Industrial detergent composition and a method for cleansing tanks to remove petroleum products, sediments, and deposits | |
| Sharma et al. | Electrochemical and Computational study of the Ocimum Americanum Extract for steel in Acidic medium: A Green Pathway to reduce the corrosion of steel | |
| CN104947808A (en) | Building exterior wall steel structure derusting method | |
| CN213596419U (en) | Pickling bath for pickling stainless steel pipes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |