WO2023217162A1 - 690MPa级耐候桥梁钢构件的稳定化处理液、处理方法及应用 - Google Patents

690MPa级耐候桥梁钢构件的稳定化处理液、处理方法及应用 Download PDF

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Publication number
WO2023217162A1
WO2023217162A1 PCT/CN2023/093151 CN2023093151W WO2023217162A1 WO 2023217162 A1 WO2023217162 A1 WO 2023217162A1 CN 2023093151 W CN2023093151 W CN 2023093151W WO 2023217162 A1 WO2023217162 A1 WO 2023217162A1
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content
treatment liquid
bridge steel
resistant bridge
weather
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PCT/CN2023/093151
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English (en)
French (fr)
Inventor
郎丰军
李江文
董中波
程鹏
陈勇
庞涛
马颖
周庆军
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Baoshan Iron and Steel Co Ltd
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Baoshan Iron and Steel Co Ltd
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Priority to US18/864,519 priority Critical patent/US20250305151A1/en
Priority to CA3252805A priority patent/CA3252805A1/en
Priority to AU2023266463A priority patent/AU2023266463A1/en
Priority to KR1020247040507A priority patent/KR20250008896A/ko
Priority to JP2024566440A priority patent/JP2025515768A/ja
Publication of WO2023217162A1 publication Critical patent/WO2023217162A1/zh
Anticipated expiration legal-status Critical
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    • 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
    • C23F11/18—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 inorganic inhibitors
    • C23F11/187—Mixtures of inorganic 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
    • C23C22/05—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 using aqueous solutions
    • C23C22/68—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 using aqueous solutions using aqueous solutions with pH between 6 and 8
    • 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
    • C23C22/05—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 using aqueous solutions
    • C23C22/06—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 using aqueous solutions using aqueous acidic solutions with pH less than 6
    • C23C22/48—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 using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
    • C23C22/50—Treatment of iron or alloys based thereon
    • 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
    • C23F11/18—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 inorganic inhibitors
    • C23F11/182—Sulfur, boron or silicon containing compounds
    • 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
    • C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
    • C23C2222/10—Use of solutions containing trivalent chromium but free of hexavalent chromium

Definitions

  • the invention belongs to the technical field of corrosion and protection, and relates to the protection technology of weather-resistant bridge steel components. Specifically, it refers to the stabilization treatment liquid and treatment method used for 690MPa grade weather-resistant bridge steel components.
  • weather-resistant bridge steel without painting can greatly save painting costs, benefit environmental protection, shorten the construction period, and greatly reduce maintenance costs during the operation of the bridge (it has a good cost advantage throughout the life cycle).
  • rust layer stabilization treatment it generally takes 3 to 10 years for the surface rust layer of weather-resistant bridge steel to gradually stabilize.
  • rust water will flow out, affecting the appearance and causing the steel plate to become thinner. This leads to the phenomenon that rust liquid will easily sag and scatter in the early stage of exposed use of weather-resistant bridge steel, polluting the environment, seriously affecting the consistency of the appearance and color of weather-resistant bridge steel.
  • the strength level of high-strength bridge steel plates has been increased to 690MPa.
  • no rust layer stabilization treatment technology for high-strength weather-resistant bridge steel components has been developed so far.
  • weather-resistant bridge steel components are composed of weather-resistant steel plates processed and welded. Common weather-resistant bridge steel components are approximately cubes. Due to the large size of weather-resistant bridge steel components, weather-resistant bridge steel components are difficult to flip. Therefore, the rust layer stabilization treatment of weather-resistant bridge steel components includes the side elevation, top surface, bottom surface and other parts of the component. Due to the flow of the rust layer stabilization treatment liquid on various parts of the component, the color of the rust layer on the surface of the weather-resistant bridge steel components treated by the rust layer stabilization treatment is uneven and the rust liquid flows.
  • the treatment agent consists of silane coupling agent. Agent 1 to 50%, ethanol 1 to 10%, hydrolysis accelerator 0.05 to 0.5%, rust layer stabilizing accelerator 0.5 to 10%, and the rest is deionized water.
  • the treatment agent includes the following raw materials: CuSO 4 0.8 ⁇ 1.2%, Cr 2 (SO 4 ) 3 2.8 ⁇ 3.2%, NaHSO 3 0.5 ⁇ 0.7%, Fe 3 O 4 0.08 ⁇ 0.12%, and the balance is deionized water.
  • the patent applied by Anshan Iron and Steel Co., Ltd. "A treatment agent for rapid formation of rust layer on the surface of weathering steel and its use method (CN201710068872.5)" is composed of two parts: agent A and agent B.
  • agent A in mass percentage is: CuSO 4 0.4 % ⁇ 2%, NaCl 0.1% ⁇ 2.5%, FeCl 3 0.5% ⁇ 3%, HCl 0.1% ⁇ 0.5%, the balance is water;
  • Agent B is a moisturizing agent aqueous solution, and the moisturizing agent mass percentage is 0.2% ⁇ 3.5 %, the balance is water;
  • the moisturizing agent is one or more of NaH 2 PO 4 , Na 5 P 3 O 10 , (NaPO 3 ) 6 , C 6 H 5 Na 3 O 7 ⁇ 2H 2 O .
  • the above technology mainly describes the stabilization treatment of weathering steel rust layer, and no stabilization treatment liquid and treatment method involving 690MPa grade weathering bridge steel components were found.
  • the above patent applications all involve the surface rust layer stabilization treatment liquid and method of weathering steel, but do not involve the rust layer stabilization treatment of weathering steel components, and the above technology does not satisfy the rust layer of the high-strength (690MPa) weathering bridge steel of the present invention. Stabilization treatment.
  • the present invention provides a rust layer for 690MPa grade high-strength weather-resistant bridge steel components. Stabilized treatment fluid. Another technical problem to be solved by the present invention is to provide a treatment method for a treatment liquid for stabilizing the rust layer of 690MPa grade high-strength weather-resistant bridge steel components. Another technical problem to be solved by the present invention is to provide the application of the treatment liquid.
  • the 690MPa grade refers to the yield strength of steel ⁇ 690MPa.
  • the technical solution of the present invention is a stabilizing treatment liquid for 690MPa grade weather-resistant bridge steel components
  • the stabilization treatment liquid for the 690MPa grade weather-resistant bridge steel components includes an corrosive agent, a rust layer stabilizer, a moisturizer and a thickener;
  • the corrosive agent is composed of ferric chloride and sodium bisulfite
  • the rust layer stabilizer is composed of Composed of chromium sulfate and potassium permanganate
  • the moisturizer is polypropylene glycol
  • the thickener is sodium carboxymethyl cellulose
  • the mass percentage content of each component of the stabilization treatment solution is:
  • the content of ferric chloride is 3 to 7%;
  • the content of sodium bisulfite is 1 to 2%;
  • the content of chromium sulfate is 3 to 6%;
  • the content of potassium permanganate is 1 to 4%
  • the content of polypropylene glycol is 1 to 2%;
  • the content of sodium carboxymethyl cellulose is 2 to 5%;
  • the balance is deionized water.
  • each component in the stabilizing treatment liquid for 690MPa grade weather-resistant bridge steel components of the present invention is as follows:
  • Ferric chloride and sodium bisulfite are used as corrosive agents in the treatment liquid of the present invention, and the oxidizing properties of iron ions and the corrosive properties of chloride ions and bisulfite ions are used to corrode and rust the 690MPa grade weather-resistant bridge steel components, making the components
  • the elemental iron in the iron transforms into iron oxides.
  • Chromium sulfate and potassium permanganate are used as rust layer stabilizers. Potassium permanganate has strong oxidizing properties. Together with chromium, it promotes the transformation of lepidocrocite and tetragonal lepidocrocite into goethite in the rust layer.
  • Chromium also It can replace goethite to form a 690MPa grade weather-resistant bridge steel component and finally stabilize the rust layer.
  • Polypropylene glycol is used as a humectant, and its low volatility properties are used to maintain the moisture of the treatment solution and prolong the reaction time of the effective reaction components in the treatment solution.
  • Sodium carboxymethyl cellulose is used as a thickener to fully hydrate the thickener components in the treatment liquid to form macromolecular substances, thereby reducing the fluidity of the treatment liquid and increasing the residence time of the treatment liquid on the side elevations or slopes of the component. Compared with not adding sodium carboxymethyl cellulose in the present invention, the residence time is increased by 3 to 5 times.
  • the corrosive agent and rust layer stabilizer components in the treatment solution of the present invention promote the formation of a stable rust layer on 690MPa weather-resistant bridge steel components, and the addition of moisturizers and thickeners improves the electrochemical and chemical reaction time with the component surface.
  • the four components interact with each other. The synergy ensures that the surface of the 690MPa grade weather-resistant bridge steel components forms a brown rust layer with uniform color and no rust liquid flowing.
  • the mass percentage content of ferric chloride in the stabilization treatment liquid of the 690MPa grade weather-resistant bridge steel components of the present invention is 3 to 7%, such as 3%, 4%, 4.5%, 5 %, 6%, 7%.
  • the mass percentage content of sodium bisulfite in the stabilization treatment liquid of the 690MPa grade weather-resistant bridge steel components of the present invention is 1 to 2%, such as 1%, 1.2%, 1.5%, 1.6 %, 1.9%, 2%.
  • the mass percentage content of chromium sulfate in the stabilization treatment liquid of 690MPa grade weather-resistant bridge steel components of the present invention is 3 to 6%, such as 3%, 4%, 4.5%, 5%, 5.5%, 6%.
  • the mass percentage content of potassium permanganate in the stabilization treatment liquid of 690MPa grade weather-resistant bridge steel components of the present invention is 1 to 4%, such as 1%, 2%, 2.5%, 3 %, 3.5%, 4%.
  • the mass percentage content of polypropylene glycol in the stabilization treatment liquid of the 690MPa grade weather-resistant bridge steel components of the present invention is 1 to 2%, such as 1%, 1.2%, 1.5%, 1.7%, 1.8%, 2%.
  • the mass percentage content of sodium carboxymethyl cellulose in the stabilization treatment liquid of 690MPa grade weather-resistant bridge steel components of the present invention is 2 to 5%, such as 2%, 3%, 3.5% , 3.8%, 4%, 5%.
  • the mass percentage content of each component is: the content of ferric chloride is 4 to 5%; the content of sodium bisulfite is The content is 1 to 2%; the content of chromium sulfate is 4 to 5%; the content of potassium permanganate is 2 to 3%; the content of polypropylene glycol is 1 to 2%; the content of sodium carboxymethyl cellulose is 2 to 4%; the balance is deionized water.
  • the mass percentage content of each component of the stabilization treatment liquid is: the content of ferric chloride is 4 to 5%; the content of sulfurous acid is The content of sodium hydrogen is 1 to 1.5%; the content of chromium sulfate is 4 to 5%; the content of potassium permanganate is 2 to 3%; the content of polypropylene glycol is 1 to 1.5%; the content of sodium carboxymethyl cellulose is 2 to 3% ; The balance is deionized water.
  • the invention also provides a method for treating a stabilizing liquid for 690MPa grade weather-resistant bridge steel components, or a method for stabilizing 690MPa grade weather-resistant bridge steel components.
  • the method includes the following steps:
  • the surface of the 690MPa grade weather-resistant bridge steel components obtained by the method of the present invention forms a brown rust layer with uniform color and no rust liquid flowing.
  • the standard of Sa2 level is in accordance with Article 3.2.3 of the national standard of the People's Republic of China GB 8923-88 steel surface corrosion level and rust removal level before painting.
  • the principle of the stabilization treatment method for 690MPa grade weather-resistant bridge steel components of the present invention is as follows:
  • the components are evenly mixed, and on the other hand, the thickener component in the treatment liquid is fully hydrated to form macromolecular substances and increase the viscosity of the treatment liquid.
  • the surface sandblasting treatment of 690MPa grade weather-resistant bridge steel components can remove the iron oxide scale on the surface of the components and increase the surface roughness. Thereby increasing the adhesion amount and reaction time of the treatment liquid on the component surface, and improving the rust layer stabilization treatment effect.
  • the amount of treatment liquid adhering to the surface of the component directly affects the color of the rust layer on the surface after treatment, uniform spraying must be ensured during the treatment process, and liquid accumulation on the top and bottom surfaces of the component must be eliminated. This ensures that the surface color of the component is uniform after treatment. Preferably, ensure that the amount of treatment liquid is 1 to 2 liters/square meter.
  • Ventilation drying increases the oxygen content in the treatment solution and promotes the chemical and electrochemical reactions of the stabilization treatment.
  • the stirring in step (1) is to use Stir with a mixer; the stirring speed is preferably set to 300 to 500 rpm, such as 300 rpm, 350 rpm, 400 rpm, 440 rpm, or 500 rpm.
  • the stirring time of the treatment liquid in step (1) is 1 to 2 hours, such as 1 hour, 1.2 hours, 1.5 hours, 1.6 hours, 1.8 hours, or 2 hours.
  • the dosage of the treatment liquid in step (3) is 1 to 2 liters/square meter, such as 1 liter/square meter, 1.2 liters/square meter, 1.5 liters/square meter, 1.8 liters/square meter, 2 liters/square meter.
  • step (4) uses a roller brush to remove accumulated deposits. liquid.
  • the ventilation and drying time is ⁇ 15 days, For example, 15 days, 2 days, 25 days, 28 days, 29 days, 30 days.
  • the ventilation and drying in step (5) is carried out in Conducted outdoors.
  • the components are placed outdoors. Under the action of rain, dew, and sunlight, the surface of the component forms an alternating dry and wet environment, which accelerates the formation of a stable rust layer on the surface of the component.
  • the ventilation and drying time is 15-30 days. The longer the ventilation and drying time is, the more stable the rust layer of the components will be.
  • the stable rust layer obtained by using the stabilizing treatment liquid and treatment method for 690MPa grade weather-resistant bridge steel components of the present invention has the following technical parameters: (1) The thickness of the rust layer on the surface of the component is ⁇ 80 ⁇ m, such as 85 ⁇ m, 88 ⁇ m, 90 ⁇ m, 92 ⁇ m, 95 ⁇ m ; (2) The color difference value of the surface rust layer on different parts of the component is ⁇ E ⁇ 10, such as 4, 4.5, 5, 6, 7, 9; (3) The amount of rust layer on the surface of the component is ⁇ 25g/m 2 , such as 28g/m 2 , 29g/m 2 , 30g/m 2 , 32g/m 2 , 35g/m 2 .
  • the thickness of the rust layer on the surface of the component is 10 to 40 ⁇ m; (2) The color difference value ⁇ E of the surface rust layer on different parts of the component is 20 to 50; (3) The surface rust of the component The layer weight is 5 ⁇ 10g/m 2 .
  • the invention also provides the application of the above-mentioned stabilizing treatment liquid in the stabilizing treatment of 690MPa grade weather-resistant bridge steel components.
  • the present invention can stabilize the rust layer of 690MPa grade weather-resistant bridge steel components.
  • the treated 690MPa grade weather-resistant bridge steel components will form a brown rust layer on the surface with uniform color and no rust liquid flowing.
  • the treatment liquid used in the present invention for 690MPa grade weather-resistant bridge steel components is composed of corrosive agent, rust layer stabilizer, moisturizer, thickener, and water.
  • the treatment liquid can evenly adhere to the inner side and top surface of the component. , bottom surface and other parts, and can improve the electrochemical and chemical reaction time with the component surface.
  • the thickness of the surface rust layer of the 690MPa grade weather-resistant bridge steel components treated by the present invention is ⁇ 80 ⁇ m
  • the color difference value of the surface rust layer in different parts of the component is ⁇ E ⁇ 10
  • the surface rust layer amount of the component is ⁇ 25 g/m 2 .
  • Rust layer thickness measurement Use a coating thickness gauge to measure the rust layer thickness of weather-resistant bridge steel components. Select the area of the area to be tested ⁇ 0.01 square meters, select 10 points in this area to measure the rust layer thickness, and calculate the average rust layer thickness at the detection points.
  • Measurement of the color difference value ⁇ E of the surface rust layer on different parts of the component Use a colorimeter to detect the color uniformity of the rust layer on weather-resistant bridge steel components. Select a certain point of the rust layer in the part to be detected as the standard sample, measure the color difference value ⁇ E of the rust layer at 10 points on the component, and calculate the average color difference value ⁇ E of the detection points.
  • the dosage of the treatment liquid is 1.8 liters/square meter. Use a roller brush to remove any accumulated fluid on the top and bottom surfaces. Place the components outdoors for 15 days, ventilate and dry.
  • the surface of the treated 690MPa weather-resistant bridge steel components forms a brown rust layer with uniform color and no rust liquid flowing.
  • the thickness of the rust layer on the surface of the component is 85 ⁇ m.
  • the color difference value ⁇ E of the surface rust layer on different parts of the component is 9.
  • the amount of rust layer on the surface of the component is 28g/m 2 .
  • the dosage of the treatment liquid is 1.5 liters/square meter. Use a roller brush to remove any accumulated fluid on the top and bottom surfaces. Place the components outdoors for 30 days, ventilate and dry.
  • the surface of the treated 690MPa weather-resistant bridge steel components forms a brown rust layer with uniform color and no rust liquid flowing.
  • the thickness of the rust layer on the surface of the component is 90 ⁇ m.
  • the color difference value ⁇ E of the surface rust layer on different parts of the component is 5.
  • the amount of rust layer on the surface of the component is 30g/m 2 .
  • the dosage of the treatment liquid is 1 liter/square meter. Use a roller brush to remove any accumulated fluid on the top and bottom surfaces. Place the components outdoors for 28 days, ventilate and dry.
  • the surface of the treated 690MPa weather-resistant bridge steel components forms a brown rust layer with uniform color and no rust liquid flowing.
  • the thickness of the rust layer on the surface of the component is 88 ⁇ m.
  • the color difference value ⁇ E of the surface rust layer on different parts of the component is 6.
  • the amount of rust layer on the surface of the component is 32g/m 2 .
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • Use spray equipment to evenly spray the treatment liquid to the side elevations, top surfaces, bottom surfaces and other parts of the component.
  • the dosage of the treatment liquid is 1.2 liters/square meter.
  • Use a roller brush to remove any accumulated fluid on the top and bottom surfaces. Place the components outdoors for 25 days, ventilate and dry.
  • the surface of the 690MPa grade weather-resistant bridge steel components forms a brown rust layer with uniform color and no rust liquid flowing.
  • the thickness of the rust layer on the surface of the component is 88 ⁇ m.
  • the color difference value of the surface rust layer on different parts of the component is 7.
  • the amount of rust layer on the surface of the component is 7. is 29g/m 2 .
  • the stabilization treatment liquid for 690MPa grade weather-resistant bridge steel components according to mass percentage, and weigh the contents of each component.
  • the content in percentages is: ferric chloride content is 4.5%, sodium bisulfite content is 1.9%, chromium sulfate content is 4.5%, potassium permanganate content is 2.5%, polypropylene glycol content is 1.7% , the content of sodium carboxymethyl cellulose is 3.8%, and the balance is deionized water.
  • the surface of weather-resistant bridge steel components is sandblasted, and the surface grade reaches Sa2 level.
  • Use spray equipment to evenly spray the treatment liquid to the side elevations, top surfaces, bottom surfaces and other parts of the component.
  • the dosage of the treatment liquid is 2 liters/square meter.
  • Use a roller brush to remove any accumulated fluid on the top and bottom surfaces. Place the components outdoors for 29 days, ventilate and dry.
  • the surface of the treated 690MPa weather-resistant bridge steel components forms a brown rust layer with uniform color and no rust liquid flowing.
  • the thickness of the rust layer on the surface of the component is 92 ⁇ m.
  • the color difference value ⁇ E of the surface rust layer on different parts of the component is 4.5.
  • the amount of rust layer on the surface of the component is 27g/m 2 .

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  • Engineering & Computer Science (AREA)
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  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Chemical Treatment Of Metals (AREA)
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Abstract

本发明公开了一种用于690MPa级耐候桥梁钢构件的稳定化处理液，所述稳定化处理液各组分质量百分比含量为：三氯化铁的含量为3～7％；亚硫酸氢钠的含量为1～2％；硫酸铬的含量为3～6％；高锰酸钾的含量为1～4％；聚丙二醇的含量为1～2％；羧甲基纤维素钠的含量为2～5％；余量为去离子水。还提供了使用该稳定化处理液进行稳定化处理的方法。本发明可以实现对690MPa级耐候桥梁钢构件的锈层稳定化处理，处理后的690MPa级耐候桥梁钢构件表面形成颜色均一、无锈液流淌的棕色锈层。

Description

690MPa级耐候桥梁钢构件的稳定化处理液、处理方法及应用 技术领域
本发明属于腐蚀与防护技术领域，涉及耐候桥梁钢构件的防护技术，具体地指用于690MPa级耐候桥梁钢构件的稳定化处理液及处理方法。
背景技术
耐候桥梁钢免涂装使用可大大节省涂装费用、有利于环保、缩短施工周期，同时极大地降低了桥梁运营期间的维护成本(全寿命周期具有较好的成本优势)。但是，如果不经过锈层稳定化处理，耐候桥梁钢一般要经过3～10年表面锈层才能逐渐稳定。另外，免涂装耐候钢桥梁，在生成保护锈层过程中，锈水会流出，影响美观且钢板会减薄。这就导致耐候桥梁钢在裸露使用初期容易出现锈液流挂、飞散污染环境的现象，严重影响耐候桥梁钢外观颜色的一致性。这已经成为限制耐候桥梁钢免涂装推广应用的一个瓶颈问题。因此，为了短时间内在其表面形成稳定锈层，需要对其表面进行锈层稳定化处理。
为适应我国桥梁钢结构向大跨径、高强度发展，高强度桥梁钢板强度级别已提升至690MPa。但至今未形成高强度耐候桥梁钢构件的锈层稳定化处理技术。而且耐候桥梁钢构件是由耐候钢板经加工焊接组成，常见的耐候桥梁钢构件近似为立方体。鉴于耐候桥梁钢构件尺寸较大，耐候桥梁钢构件难以进行翻转。因此，耐候桥梁钢构件的锈层稳定化处理包含了构件的侧立面、顶面、底面等部位。由于锈层稳定化处理液在构件各部位上的流淌，导致经锈层稳定化处理的耐候桥梁钢构件表面锈层颜色不均一、锈液流淌。
现有技术中，中国科学院金属研究所申请的专利“基于硅烷偶联剂的耐候钢表面锈层稳定化处理剂及其制备方法和使用方法(CN202111080510.0)”，处理剂组成为硅烷偶联剂1～50％，乙醇1～10％，水解促进剂0.05～0.5％，锈层稳定促进剂0.5～10％，其余为去离子水。首钢集团申请的专利“耐候钢表面锈层稳定化处理剂和耐候钢表面涂膜处理方法(CN202010666089.0)”，成膜试剂：50～80份；诱导剂：1～10份；磷化剂：0.2～1份；促进剂：1～5份；改性剂：1～10份；缓蚀剂：1～10份；表面助剂：0.05～0.3份；润湿分散剂：0.05～0.4份；流平剂：0.05～0.4份。兰州理工大学申请的专利“适用于工业大气环境的耐候钢表面稳定化处理剂及处理方法(CN202110934825.0)”，处理剂包括如下原料： CuSO40.8～1.2％、Cr2(SO4)32.8～3.2％、NaHSO30.5～0.7％、Fe3O40.08～0.12％，余量为去离子水。鞍钢申请的专利“一种耐候钢表面稳定化锈层快速生成处理剂及其使用方法(CN201710068872.5)”，由A剂和B剂两部分组成，A剂组成按质量百分比为：CuSO40.4％～2％、NaCl 0.1％～2.5％、FeCl30.5％～3％、HCl 0.1％～0.5％，余量为水；B剂为保湿剂水溶液，保湿剂质量百分含量为0.2％～3.5％，余量为水；所述的保湿剂为NaH2PO4、Na5P3O10、(NaPO3)6、C6H5Na3O7·2H2O中的一种或几种。
上述技术主要对耐候钢锈层稳定化处理进行了表述，未查询到涉及690MPa级耐候桥梁钢构件的稳定化处理液和处理方法。上面的专利申请，均涉及耐候钢的表面锈层稳定化处理液及方法，未涉及耐候钢构件的锈层稳定化处理，而且上述技术不满足本发明高强度(690MPa)耐候桥梁钢的锈层稳定化处理。
发明内容
因此，为克服上述技术的不足，解决690MPa级耐候桥梁钢构件锈层稳定化处理以及表面锈层颜色不均一、锈液流淌等问题，本发明提供了针对690MPa级高强耐候桥梁钢构件的锈层稳定化的处理液。本发明要解决的另一个技术问题是提供690MPa级高强耐候桥梁钢构件的锈层稳定化的处理液的处理方法。本发明要解决的另一个技术问题是，提供该处理液的应用。本发明中，690MPa级是指钢的屈服强度≥690MPa。
本发明的技术方案是，一种690MPa级耐候桥梁钢构件的稳定化处理液，
所述690MPa级耐候桥梁钢构件的稳定化处理液包括侵蚀剂、锈层稳定剂、保湿剂和增稠剂；所述侵蚀剂由三氯化铁和亚硫酸氢钠组成，锈层稳定剂由硫酸铬和高锰酸钾组成，保湿剂为聚丙二醇，增稠剂为羧甲基纤维素钠；
稳定化处理液各组分质量百分比含量为：
三氯化铁的含量为3～7％；
亚硫酸氢钠的含量为1～2％；
硫酸铬的含量为3～6％；
高锰酸钾的含量为1～4％
聚丙二醇的含量为1～2％；
羧甲基纤维素钠的含量为2～5％；
余量为去离子水。
本发明的用于690MPa级耐候桥梁钢构件的稳定化处理液中各组分的作用如下：
本发明处理液中采用三氯化铁和亚硫酸氢钠作为侵蚀剂，利用铁离子的氧化性以及氯离子、亚硫酸氢根离子的腐蚀性将690MPa级耐候桥梁钢构件侵蚀起锈，使构件中的单质铁向铁的氧化物转变。采用硫酸铬和高锰酸钾作为锈层稳定剂，高锰酸钾具有强氧化性，其与铬元素一起促进锈层中纤铁矿、四方纤铁矿向针铁矿转变作用，铬元素还能够置换针铁矿形成690MPa级耐候桥梁钢构件最终稳定锈层。采用聚丙二醇作为保湿剂，利用其低挥发特性，保持处理液水分，延长处理液中有效反应组分的反应时间。采用羧甲基纤维素钠作为增稠剂，使处理液中增稠剂组分充分水化形成大分子物质，从而降低处理液的流动性，增加处理液在构件侧立面或斜面停留时间。相比未添加，本发明添加了羧甲基纤维素钠停留时间增加3～5倍。
本发明的处理液中侵蚀剂、锈层稳定剂组分促进690MPa级耐候桥梁钢构件形成稳定锈层，添加保湿剂、增稠剂提高与构件表面电化学和化学反应时间，四种组分相互协同确保了690MPa级耐候桥梁钢构件表面形成颜色均一、无锈液流淌的棕色锈层。
在一个或多个实施方案中，本发明的690MPa级耐候桥梁钢构件的稳定化处理液中，三氯化铁的质量百分比含量为3～7％，例如3％、4％、4.5％、5％、6％、7％。
在一个或多个实施方案中，本发明的690MPa级耐候桥梁钢构件的稳定化处理液中，亚硫酸氢钠的质量百分比含量为1～2％，例如1％、1.2％、1.5％、1.6％、1.9％、2％。
在一个或多个实施方案中，本发明的690MPa级耐候桥梁钢构件的稳定化处理液中，硫酸铬的质量百分比含量为3～6％，例如3％、4％、4.5％、5％、5.5％、6％。
在一个或多个实施方案中，本发明的690MPa级耐候桥梁钢构件的稳定化处理液中，高锰酸钾的质量百分比含量为1～4％，例如1％、2％、2.5％、3％、3.5％、4％。
在一个或多个实施方案中，本发明的690MPa级耐候桥梁钢构件的稳定化处理液中，聚丙二醇的质量百分比含量为1～2％，例如1％、1.2％、1.5％、1.7％、1.8％、2％。
在一个或多个实施方案中，本发明的690MPa级耐候桥梁钢构件的稳定化处理液中，羧甲基纤维素钠的质量百分比含量为2～5％，例如2％、3％、3.5％、3.8％、4％、5％。
在一个或多个实施方案中，本发明的690MPa级耐候桥梁钢构件的稳定化处理液中，各组分质量百分比含量为：三氯化铁的含量为4～5％；亚硫酸氢钠的含量为1～2％；硫酸铬的含量为4～5％；高锰酸钾的含量为2～3％；聚丙二醇的含量为1～2％；羧甲基纤维素钠的含量为2～4％；余量为去离子水。
根据本发明所述的一种690MPa级耐候桥梁钢构件的稳定化处理液，优选的是，稳定化处理液各组分质量百分比含量为：三氯化铁的含量为4～5％；亚硫酸氢钠的含量为 1～1.5％；硫酸铬的含量为4～5％；高锰酸钾的含量为2～3％；聚丙二醇的含量为1～1.5％；羧甲基纤维素钠的含量为2～3％；余量为去离子水。
本发明还提供了一种690MPa级耐候桥梁钢构件的稳定化处理液的处理方法，或一种对690MPa级耐候桥梁钢构件进行稳定化处理的方法，所述方法包括如下步骤：
(1)按上述用于690MPa级耐候桥梁钢构件的稳定化处理液配方，按质量百分比配制处理液，充分搅拌均匀；搅拌速度不超过500转/分钟；
(2)对耐候桥梁钢构件表面进行喷砂处理，表面级别达到Sa2级别；
(3)使用喷淋设备将处理液均匀的喷洒至构件的侧立面、顶面、底面等部位；
(4)清除顶面、底面等部位存在的积液；
(5)将构件充分通风干燥。
采用本发明方法获得的690MPa级耐候桥梁钢构件表面形成颜色均一、无锈液流淌的棕色锈层。
本发明中，Sa2级别的标准按照中华人民共和国国家标准GB 8923-88涂装前钢材表面锈蚀等级和除锈等级第3.2.3条。
本发明的用于690MPa级耐候桥梁钢构件的稳定化处理方法原理如下：
在配置处理液过程中使用搅拌机搅拌，一方面使各组分均匀混合，另一方面使处理液中增稠剂组分充分水化形成大分子物质，提高处理液粘度。
690MPa级耐候桥梁钢构件表面喷砂处理可以去除构件表面的氧化铁皮，增加表面粗糙度。从而增加处理液在构件表面的附着量、反应时间，提高锈层稳定化处理效果。
由于处理液在构件表面的附着量直接影响处理后表面锈层颜色，在处理过程必须保证喷淋均匀，并且要消除构件顶面、底面等部位存在的积液。从而保证构件处理后表面颜色均匀一致。优选地，确保处理液用量为1～2升/平米。
通风干燥增加了处理液中的氧含量，促进稳定化处理的化学和电化学反应。
根据本发明的一种690MPa级耐候桥梁钢构件的稳定化处理液的处理方法或一种对690MPa级耐候桥梁钢构件进行稳定化处理的方法，优选的是，步骤(1)所述搅拌为使用搅拌机搅拌；搅拌转速优选设定为300～500转/分钟，例如300转/分钟、350转/分钟、400转/分钟、440转/分钟、500转/分钟。
进一步地，步骤(1)所述处理液搅拌时间为1～2小时，例如1小时、1.2小时、1.5小时、1.6小时、1.8小时、2小时。
优选的是，步骤(3)所述处理液用量为1～2升/平米，例如1升/平米、1.2升/平米、 1.5升/平米、1.8升/平米、2升/平米。
根据本发明的一种690MPa级耐候桥梁钢构件的稳定化处理液的处理方法或一种对690MPa级耐候桥梁钢构件进行稳定化处理的方法，优选的是，步骤(4)采用滚刷清除积液。
根据本发明的一种690MPa级耐候桥梁钢构件的稳定化处理液的处理方法或一种对690MPa级耐候桥梁钢构件进行稳定化处理的方法，优选的是，所述通风干燥时间≥15天，例如15天、2天、25天、28天、29天、30天。
根据本发明的一种690MPa级耐候桥梁钢构件的稳定化处理液的处理方法或一种对690MPa级耐候桥梁钢构件进行稳定化处理的方法，优选的是，步骤(5)所述通风干燥在户外进行。
构件放置于户外，在雨水、露水、太阳光的作用下，构件表面形成干湿交替的环境，加速了构件表面稳定锈层的形成。
更优选的是，所述通风干燥时间为15-30天。通风干燥时间越久，构件锈层越稳定。
使用本发明用于690MPa级耐候桥梁钢构件的稳定化处理液及处理方法获得的稳定锈层具有以下技术参数：(1)构件表面锈层厚度≥80μm，例如85μm、88μm、90μm、92μm、95μm；(2)构件不同部位的表面锈层色差值ΔE≤10，例如4、4.5、5、6、7、9；(3)构件表面锈层量≥25g/m2，例如28g/m2、29g/m2、30g/m2、32g/m2、35g/m2。
690MPa级耐候桥梁钢构件自然成锈技术参数：(1)构件表面锈层厚度为10～40μm；(2)构件不同部位的表面锈层色差值ΔE为20～50；(3)构件表面锈层量5～10g/m2。
本发明还提供了上述稳定化处理液在690MPa级耐候桥梁钢构件稳定化处理方面的应用。
有益效果：
本发明与现有技术相比：
(1)本发明可以实现对690MPa级耐候桥梁钢构件的锈层稳定化处理，处理后的690MPa级耐候桥梁钢构件表面形成颜色均一、无锈液流淌的棕色锈层。
(2)本发明中的用于690MPa级耐候桥梁钢构件的处理液由侵蚀剂、锈层稳定剂、保湿剂、增稠剂、水组成，处理液可以均匀粘附在构件侧里面、顶面、底面等部位，并且能够提高与构件表面电化学和化学反应时间。
(3)利用本发明处理的690MPa级耐候桥梁钢构件表面锈层厚度≥80μm、构件不同部位的表面锈层色差值ΔE≤10，构件表面锈层量≥25g/m2。
具体实施方式
为更好的解释本发明，以下结合具体实施例对用于690MPa级耐候桥梁钢构件的稳定化处理液及处理方法进行详细说明。
实施例中参数测试方法如下：
锈层厚度测量：利用涂层测厚仪对耐候桥梁钢构件锈层厚度进行测量。选取待测部位面积＜0.01平米，在该区域选取10个点进行锈层厚度测量，计算检测点平均锈层厚度。
构件不同部位的表面锈层色差值ΔE测量：采用色差仪对耐候桥梁钢构件锈层颜色均匀性检测。选取待检测部位某一点锈层为标准样，测量构件10个点锈层色差值ΔE，计算检测点平均色差值ΔE。
构件表面锈层量测量：采用失重法对构件表面锈层量进行测量。构件处理时同步处理3～5件试片，测量试片长宽高以及重量W1并计算表面积S。对试片酸洗除锈，称取酸洗后重量W2。构件表面锈层量＝(W1-W2)/S。
实施例一：
按质量百分比配制用于690MPa级耐候桥梁钢构件的稳定化处理液，称取各组分质量百分比含量为：三氯化铁的含量为3％，亚硫酸氢钠的含量为1％，硫酸铬的含量为3％，高锰酸钾的含量为1％，聚丙二醇的含量为1％，羧甲基纤维素钠的含量为2％，余量为去离子水。使用搅拌机设定300转/分钟搅拌速率对处理液搅拌1小时。对耐候桥梁钢构件表面进行喷砂处理，表面级别达到Sa2级别。使用喷淋设备将处理液均匀的喷洒至构件的侧立面、顶面、底面等部位，处理液用量为1.8升/平米。使用滚刷将顶面、底面等部位存在的积液清除。将构件放置于户外15天，通风干燥。处理后的690MPa级耐候桥梁钢构件表面形成颜色均一、无锈液流淌的棕色锈层，构件表面锈层厚度为85μm、构件不同部位的表面锈层色差值ΔE为9，构件表面锈层量为28g/m2。
实施例二：
按质量百分比配制用于690MPa级耐候桥梁钢构件的稳定化处理液，称取各组分质量百分比含量为：三氯化铁的含量为4％，亚硫酸氢钠的含量为1.5％，硫酸铬的含量为4％，高锰酸钾的含量为2％，聚丙二醇的含量为2％，羧甲基纤维素钠的含量为3％，余量为去离子水。使用搅拌机设定400转/分钟搅拌速率对处理液搅拌2小时。对耐候桥梁 钢构件表面进行喷砂处理，表面级别达到Sa2级别。使用喷淋设备将处理液均匀的喷洒至构件的侧立面、顶面、底面等部位，处理液用量为1.5升/平米。使用滚刷将顶面、底面等部位存在的积液清除。将构件放置于户外30天，通风干燥。处理后的690MPa级耐候桥梁钢构件表面形成颜色均一、无锈液流淌的棕色锈层，构件表面锈层厚度为90μm、构件不同部位的表面锈层色差值ΔE为5，构件表面锈层量为30g/m2。
实施例三：
按质量百分比配制用于690MPa级耐候桥梁钢构件的稳定化处理液，称取各组分质量百分比含量为：三氯化铁的含量为7％，亚硫酸氢钠的含量为2％，硫酸铬的含量为6％，高锰酸钾的含量为4％，聚丙二醇的含量为2％，羧甲基纤维素钠的含量为5％，余量为去离子水。使用搅拌机设定500转/分钟搅拌速率对处理液搅拌2小时。对耐候桥梁钢构件表面进行喷砂处理，表面级别达到Sa2级别。使用喷淋设备将处理液均匀的喷洒至构件的侧立面、顶面、底面等部位，处理液用量为1升/平米。使用滚刷将顶面、底面等部位存在的积液清除。将构件放置于户外28天，通风干燥。处理后的690MPa级耐候桥梁钢构件表面形成颜色均一、无锈液流淌的棕色锈层，构件表面锈层厚度为88μm、构件不同部位的表面锈层色差值ΔE为6，构件表面锈层量为32g/m2。
实施例四：
按质量百分比配制用于690MPa级耐候桥梁钢构件的稳定化处理液，称取各组分质量百分比含量为：三氯化铁的含量为6％，亚硫酸氢钠的含量为1.6％，硫酸铬的含量为5.5％，高锰酸钾的含量为3.5％，聚丙二醇的含量为1.5％，羧甲基纤维素钠的含量为3.5％，余量为去离子水。使用搅拌机设定350转/分钟搅拌速率对处理液搅拌1.5小时。对耐候桥梁钢构件表面进行喷砂处理，表面级别达到Sa2级别。使用喷淋设备将处理液均匀的喷洒至构件的侧立面、顶面、底面等部位，处理液用量为1.2升/平米。使用滚刷将顶面、底面等部位存在的积液清除。将构件放置于户外25天，通风干燥。处理后的690MPa级耐候桥梁钢构件表面形成颜色均一、无锈液流淌的棕色锈层，构件表面锈层厚度为88μm、构件不同部位的表面锈层色差值ΔE为7，构件表面锈层量为29g/m2。
实施例五：
按质量百分比配制用于690MPa级耐候桥梁钢构件的稳定化处理液，称取各组分质 量百分比含量为：三氯化铁的含量为4.5％，亚硫酸氢钠的含量为1.9％，硫酸铬的含量为4.5％，高锰酸钾的含量为2.5％，聚丙二醇的含量为1.7％，羧甲基纤维素钠的含量为3.8％，余量为去离子水。使用搅拌机设定440转/分钟搅拌速率对处理液搅拌1.6小时。对耐候桥梁钢构件表面进行喷砂处理，表面级别达到Sa2级别。使用喷淋设备将处理液均匀的喷洒至构件的侧立面、顶面、底面等部位，处理液用量为2升/平米。使用滚刷将顶面、底面等部位存在的积液清除。将构件放置于户外29天，通风干燥。处理后的690MPa级耐候桥梁钢构件表面形成颜色均一、无锈液流淌的棕色锈层，构件表面锈层厚度为92μm、构件不同部位的表面锈层色差值ΔE为4.5，构件表面锈层量为27g/m2。
以上实施例仅为部分优选举例，而并非是对本发明的实施方式的限定。

Claims (12)

  1. 一种690MPa级耐候桥梁钢构件的稳定化处理液，其特征在于，
    所述690MPa级耐候桥梁钢构件的稳定化处理液包括侵蚀剂、锈层稳定剂、保湿剂和增稠剂；所述侵蚀剂由三氯化铁和亚硫酸氢钠组成，锈层稳定剂由硫酸铬和高锰酸钾组成，保湿剂为聚丙二醇，增稠剂为羧甲基纤维素钠；
    稳定化处理液各组分质量百分比含量为：
    三氯化铁的含量为3～7％；
    亚硫酸氢钠的含量为1～2％；
    硫酸铬的含量为3～6％；
    高锰酸钾的含量为1～4％
    聚丙二醇的含量为1～2％；
    羧甲基纤维素钠的含量为2～5％；
    余量为去离子水。
  2. 根据权利要求1所述的一种690MPa级耐候桥梁钢构件的稳定化处理液，其特征在于，稳定化处理液各组分质量百分比含量为：三氯化铁的含量为4～5％；亚硫酸氢钠的含量为1～2％；硫酸铬的含量为4～5％；高锰酸钾的含量为2～3％；聚丙二醇的含量为1～2％；羧甲基纤维素钠的含量为2～4％；余量为去离子水。
  3. 根据权利要求1所述的一种690MPa级耐候桥梁钢构件的稳定化处理液，其特征在于，稳定化处理液各组分质量百分比含量为：三氯化铁的含量为4～5％；亚硫酸氢钠的含量为1～1.5％；硫酸铬的含量为4～5％；高锰酸钾的含量为2～3％；聚丙二醇的含量为1～1.5％；羧甲基纤维素钠的含量为2～3％；余量为去离子水。
  4. 一种对690MPa级耐候桥梁钢构件进行稳定化处理的方法，其特征在于，包括如下步骤：
    (1)按权利要求1-3中任一项所述的690MPa级耐候桥梁钢构件的稳定化处理液的配方，按质量百分比配制处理液，充分搅拌均匀；搅拌速度不超过500转/分钟；
    (2)对耐候桥梁钢构件表面进行喷砂处理，表面级别达到SA2级别；
    (3)使用喷淋设备将处理液均匀的喷洒至构件的侧立面、顶面、底面部位；
    (4)清除顶面、底面部位存在的积液；
    (5)将构件充分通风干燥，从而在690MPa级耐候桥梁钢构件表面形成颜色均一、无锈液流淌的棕色锈层。
  5. 根据权利要求4所述的方法，其特征在于，步骤(1)所述搅拌为使用搅拌机搅拌，搅拌转速设定为300～500转/分钟。
  6. 根据权利要求4所述的方法，其特征在于，步骤(1)所述处理液搅拌时间为1～2小时。
  7. 根据权利要求4所述的方法，其特征在于，步骤(3)所述处理液用量为1～2升/平米。
  8. 根据权利要求4所述的方法，其特征在于，步骤(4)采用滚刷清除积液。
  9. 根据权利要求4所述的一种690MPa级耐候桥梁钢构件的稳定化处理液的处理方法，其特征在于，步骤(5)所述通风干燥时间≥15天。
  10. 根据权利要求4所述的方法，其特征在于，步骤(5)所述通风干燥时间为15-30天。
  11. 根据权利要求4所述的方法，其特征在于，步骤(5)所述通风干燥在户外进行。
  12. 权利要求1-3中任一项所述的稳定化处理液在690MPa级耐候桥梁钢构件稳定化处理方面的应用。
PCT/CN2023/093151 2022-05-10 2023-05-10 690MPa级耐候桥梁钢构件的稳定化处理液、处理方法及应用 Ceased WO2023217162A1 (zh)

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