High-altitude weather-resistant bridge steel member rust layer stabilizing treatment agent and use method

Abstract

The application discloses a kind of high-altitude area weathering bridge steel member rust layer stabilizing treatment agent and use method, mainly solve the rust layer of high-altitude area weathering bridge steel member is difficult to stabilize and surface rust layer color is not uniform, rust liquid flow and other problems.The stabilizing treatment agent is composed of fast rusting agent and rust layer stabilizer, the fast rusting agent is composed of ferric chloride, copper sulfate, hydrogen peroxide, ethylene glycol and deionized water, the rust layer stabilizer is composed of sodium polyphosphate, sodium bisulfite and methanol and deionized water.The treatment agent of the application is suitable for the harsh environment of low temperature, oxygen is rare, inorganic salt system treatment agent is prone to icing in high sea area, the surface of high-altitude area weathering bridge steel member after processing forms brown rust layer with uniform color, no rust liquid flow.The rust layer of weathering bridge steel member can be stabilized within 8 hours by using the application, the thickness of the rust layer after processing is greater than or equal to 50 μm, the surface rust layer color difference value ΔE of different parts of the component is less than or equal to 10, and the amount of surface rust layer of the component is greater than or equal to 15 g / m 2 .

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of corrosion and protection, and relates to the protection technology of weathering bridge steel members, in particular to a rust layer stabilizing treatment agent for weathering bridge steel members in high-altitude areas and a use method thereof. BACKGROUND

[0002] A weathering steel bridge is made of weathering bridge steel plates. A stable and dense rust layer is gradually formed on the weathering bridge steel during use, and the rust layer plays a role of "stopping rust with rust". The weathering steel bridge has the advantages of no painting and less maintenance, and has been widely used abroad. However, the development of the weathering steel bridge is relatively slow in China, mainly due to the limitation of the initial rust color appearance. The surface rust layer of the weathering steel bridge can be gradually stabilized after 3 to 10 years of exposure. During the initial use, there are problems such as yellow rust flowing and uneven color when the surface does not form a protective rust layer. Therefore, in order to form a stable rust layer on the surface in a short time and improve the color uniformity of the rust layer during the initial use of the weathering steel bridge, a rust layer stabilization treatment needs to be performed on the surface.

[0003] At present, the rust layer stabilization of the weathering bridge steel mainly includes water spraying treatment and chemical agent treatment. The water spraying treatment has a long cycle and is difficult to adapt to the tight construction rhythm. Therefore, domestic researchers mainly carry out research on chemical agent treatment. The chemical agent treatment is divided into an organic system and an inorganic salt system. The organic system has the effect of forming a paint-like surface after treatment, but it has VOC emission pollution to the environment. In addition, the organic protective film of the organic system will powder and fall off after a period of use, which will pollute the environment to a certain extent. Therefore, the rust layer stabilization treatment scheme of the inorganic salt system is the main research direction. However, in high-altitude areas such as the Qinghai-Tibet Plateau and the Yunnan-Guizhou Plateau, there are harsh environmental conditions such as low temperature and thin oxygen, the oxidation reaction rate is slow, and the inorganic salt system treatment agent is prone to icing, which leads to a long time for the formation of a stable rust layer of the weathering steel bridge, and affects the treatment effect of the inorganic salt system treatment agent.

[0004] In the existing patent applications, the patent application of the Institute of Metal of Chinese Academy of Sciences "Weathering Steel Surface Rust Layer Stabilization Treatment Agent Based on Silane Coupling Agent and Its Preparation Method and Use Method (CN202111080510.0)", the composition of the treatment agent is silane coupling agent 1-50%, ethanol 1-10%, hydrolysis promoter 0.05-0.5%, rust layer stabilization promoter 0.5-10%, and the rest is deionized water. The patent application of Shougang Group "Weathering Steel Surface Rust Layer Stabilization Treatment Agent and Weathering Steel Surface Coating Film Treatment Method (CN202010666089.0)", film forming reagent: 50-80 parts; inducer: 1-10 parts; phosphating agent: 0.2-1 part; promoter: 1-5 parts; modifier: 1-10 parts; corrosion inhibitor: 1-10 parts; surface additive: 0.05-0.3 parts; wetting dispersant: 0.05-0.4 parts; leveling agent: 0.05-0.4 parts. The patent application of Lanzhou University of Technology "Weathering Steel Surface Stabilization Treatment Agent Suitable for Industrial Atmospheric Environment and Treatment Method (CN202110934825.0)", the treatment agent includes the following raw materials: CuSO4 0.8-1.2%, Cr2(SO4)3 2.8-3.2%, NaHSO3 0.5-0.7%, Fe3O4 0.08-0.12%, and the rest is deionized water. The patent application of Ansteel "A Weathering Steel Surface Stabilization Rust Layer Rapid Generation Treatment Agent and Its Use Method (CN201710068872.5)", which is composed of two parts A and B, the composition of A is as follows: CuSO4 0.4%-2%, NaCl 0.1%-2.5%, FeCl3 0.5%-3%, HCl 0.1%-0.5%, and the rest is water; B is a humectant aqueous solution, the mass percentage of humectant is 0.2%-3.5%, and the rest is water; the humectant is one or several of NaH2PO4, Na5P3O 10 , (NaPO3)6, C6H5Na3O7·2H2O.

[0005] The above-mentioned technology mainly describes the rust layer stabilization treatment of weathering steel, but does not involve the rust layer stabilization treatment agent and construction method of weathering bridge steel members in high-altitude areas, and does not overcome the problems of difficult stabilization of rust layer of weathering bridge steel members in high-altitude areas, uneven color of surface rust layer, and rust liquid flowing. SUMMARY

[0006] In order to overcome the shortcomings of the above-mentioned technology, the present application provides a rust layer stabilization treatment agent and use method of weathering bridge steel members in high-altitude areas, which solves the problems of difficult stabilization of rust layer of weathering bridge steel members in high-altitude areas, uneven color of surface rust layer, and rust liquid flowing.

[0007] To achieve the above object, the application provides a rust layer stabilizing treatment agent for weather-resistant bridge steel components in high-altitude areas, which is composed of a fast rusting agent and a rust layer stabilizer; the fast rusting agent is composed of ferric chloride, copper sulfate, hydrogen peroxide, ethylene glycol and deionized water; and the rust layer stabilizer is composed of sodium polyphosphate, sodium bisulfite, methanol and deionized water.

[0008] Further, the fast rusting agent has the following component weight percentages: 5-9% of ferric chloride, 2-5% of copper sulfate, 0.5-2% of hydrogen peroxide, 3-6% of ethylene glycol, and the rest of deionized water; and the rust layer stabilizer has the following component weight percentages: 4-8% of sodium polyphosphate, 1-3% of sodium bisulfite, 3-6% of methanol, and the rest of deionized water.

[0009] Further, the fast rusting agent has the following component weight percentages: 6-9% of ferric chloride, 3-5% of copper sulfate, 0.5-1.8% of hydrogen peroxide, 4-6% of ethylene glycol, and the rest of deionized water; and the rust layer stabilizer has the following component weight percentages: 5-8% of sodium polyphosphate, 1.5-3% of sodium bisulfite, 4-6% of methanol, and the rest of deionized water.

[0010] Further preferably, the fast rusting agent has the following component weight percentages: 9% of ferric chloride, 5% of copper sulfate, 0.5% of hydrogen peroxide, 6% of ethylene glycol, and the rest of deionized water; and the rust layer stabilizer has the following component weight percentages: 8% of sodium polyphosphate, 3% of sodium bisulfite, 6% of methanol, and the rest of deionized water.

[0011] The application also provides a use method of the rust layer stabilizing treatment agent for weather-resistant bridge steel components in high-altitude areas, which includes the following steps:

[0012] 1) A material preparation step: ferric chloride, copper sulfate, hydrogen peroxide, ethylene glycol and water are weighed according to the weight percentage, added into a stirrer and stirred to obtain a fast rusting agent; sodium polyphosphate, sodium bisulfite, methanol and water are weighed according to the weight percentage, added into a stirrer and stirred to obtain a rust layer stabilizer;

[0013] 2) A surface pretreatment step: removing the surface iron oxide scale of the weather-resistant bridge steel component;

[0014] 3) A first spraying step: using a spraying device to uniformly spray the fast rusting agent to the surface of the weather-resistant bridge steel component, and then using a rolling brush to remove the accumulated liquid on the surface;

[0015] 4) A blowing step: using a blower to blow the surface of the weather-resistant bridge steel component to accelerate the reaction between the fast rusting agent and the surface of the weather-resistant bridge steel component;

[0016] 5) Second spraying step: using spraying equipment to spray rust layer stabilizer to the surface of the weathering bridge steel member uniformly, using a rolling brush to remove the accumulated liquid on the surface;

[0017] 6) Drying step: placing the weathering bridge steel member outdoors for 7-30 days, ventilating and drying, obtaining a brown rust layer with uniform color and no rust liquid flowing on the surface of the member.

[0018] Further, in step 1), the stirring speed of the stirrer is 100-300 revolutions per minute, and the stirring time is 10-30 minutes.

[0019] Further, in step 2), the surface pretreatment step is shot blasting treatment, so that the surface level of the member reaches Sa2 level.

[0020] Further, in step 4), the air volume of the fan is not less than 10,000 cubic meters per hour.

[0021] Further, in step 4), the blowing time is 3-6 hours.

[0022] Further, in step 6), the finally obtained member rust layer has the following technical parameters: (1) the thickness of the rust layer on the surface of the member is ≥50 μm; (2) the color difference value ΔE of the rust layer on the surface of different parts of the member is ≤10; (3) the amount of the rust layer on the surface of the member is ≥15 g / m 2 .

[0023] The treating agent of the present application uses ferric chloride, copper sulfate, hydrogen peroxide and ethylene glycol as a rapid rusting agent, utilizes the oxidizability of iron ions, copper ions and hydrogen peroxide and the corrosivity of chloride ions and sulfate ions to corrode and rust the weathering bridge steel member, so that the elemental iron in the member is converted into iron oxide. The addition of ethylene glycol lowers the freezing point of the rapid rusting agent and improves the applicability of the rapid rusting agent in low-temperature environments; sodium polyphosphate, sodium bisulfite and methanol are used as a rust layer stabilizer, sodium bisulfite and sodium polyphosphate have the effect of plugging the pores of the rust layer and promoting the conversion of greigite and tetragonal greigite to goethite. The addition of methanol lowers the freezing point of the rapid rusting agent and improves the applicability of the rust layer stabilizer in severe cold regions.

[0024] In the method for using the treating agent, the stirring step can promote the components to be fully dissolved and uniformly mixed; the shot blasting treatment can remove the oxide scale on the surface of the member and increase the surface roughness, thereby increasing the adhesion amount and reaction time of the treating agent on the surface of the member and improving the rust layer stabilization treatment effect; the use of a rolling brush to remove the accumulated liquid on the surface of the member in the spraying step can improve the spraying uniformity and ensure that the color of the rust layer after treatment is consistent; ventilation and drying increase the oxygen content in the treating agent and promote the chemical and electrochemical reactions of the stabilization treatment. The member is placed outdoors for 7-30 days, under the action of rainwater, dew and sunlight, a dry-wet alternating environment is formed on the surface of the member, and the formation of the stable rust layer on the surface of the member is accelerated.

[0025] Therefore, compared with the prior art, the beneficial effects of the present application are that the treatment agent for high-altitude weather-resistant bridge steel members in the present application can be applied to the harsh environment of low temperature, thin oxygen, and easy icing of inorganic salt system treatment agent in high-altitude areas. The present application can realize the rust layer stabilization treatment of the weather-resistant bridge steel members in high-altitude areas, and the surface of the treated weather-resistant bridge steel members in high-altitude areas forms a brown rust layer with uniform color and no rust liquid flow. The present application can realize the rust layer stabilization construction of the weather-resistant bridge steel members within 8 hours, the thickness of the treated rust layer is ≥50μm, the surface rust layer color difference value ΔE of different parts of the member is ≤10, and the amount of the surface rust layer of the member is ≥15g / m 2 . DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application and the technical problems solved by the embodiments will be described below in combination with the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all embodiments.

[0027] Embodiment 1

[0028] The rust layer stabilization treatment agent for high-altitude weather-resistant bridge steel members is composed of the following components in terms of weight percentage: fast rusting agent: 9% of ferric chloride, 5% of copper sulfate, 0.5% of hydrogen peroxide, 6% of ethylene glycol, and the balance of deionized water. Rust layer stabilizer: 8% of sodium polyphosphate, 3% of sodium bisulfite, 6% of methanol, and the balance of deionized water.

[0029] Method for using the rust layer stabilization treatment agent for high-altitude weather-resistant bridge steel members:

[0030] 1) Preparation step: according to the weight percentage, 9% of ferric chloride, 5% of copper sulfate, 0.5% of hydrogen peroxide, 6% of ethylene glycol, and the balance of deionized water are weighed and prepared into a fast rusting agent; according to the weight percentage, 8% of sodium polyphosphate, 3% of sodium bisulfite, 6% of methanol, and the balance of deionized water are weighed and prepared into a rust layer stabilizer, and a stirrer is set to a stirring rate of 300 revolutions per minute to stir the fast rusting agent and the rust layer stabilizer for 30 minutes each;

[0031] 2) Surface pretreatment step: shot blasting is used to remove the surface iron oxide scale of the weather-resistant bridge steel member, so that the surface level of the member reaches Sa2 level;

[0032] 3) First spraying step: using a spraying device, the fast rusting agent is uniformly sprayed to the side vertical surface, top surface, bottom surface, and other parts of the weather-resistant bridge steel member, and a rolling brush is used to remove the accumulated liquid on the top surface, bottom surface, and other parts;

[0033] 4) blowing step: using a fan to blow the surface of the component, accelerating the reaction of the rapid corrosion agent with the surface of the component, the air volume is 20,000 cubic meters / hour, the blowing time is 6 hours;

[0034] 5) second spraying step: using a spraying device to uniformly spray the rust layer stabilizer to the side vertical surface, top surface, bottom surface and other parts of the component, using a rolling brush to remove the accumulated liquid on the top surface, bottom surface and other parts;

[0035] 6) drying step: placing the component outdoors for 30 days, ventilating and drying, forming a brown rust layer with uniform color and no rust liquid flowing on the surface of the weathering bridge steel component.

[0036] The rust layer thickness of the component surface obtained by the method is 150 μm, the surface rust layer color difference value ΔE of different parts of the component is 5, and the rust layer amount of the component surface is 35 g / m 2 .

[0037] Example 2

[0038] The rust layer stabilizing treatment agent for weathering bridge steel components in high-altitude areas consists of the following components by weight percentage: rapid corrosion agent: 5% ferric chloride, 2% copper sulfate, 2% hydrogen peroxide, 3% ethylene glycol, and the balance is deionized water; rust layer stabilizer: 4% sodium polyphosphate, 1% sodium bisulfite, 3% methanol, and the balance is deionized water.

[0039] Method for using the rust layer stabilizing treatment agent for weathering bridge steel components in high-altitude areas:

[0040] 1) preparation step: weighing 5% ferric chloride, 2% copper sulfate, 2% hydrogen peroxide, 3% ethylene glycol and the balance deionized water to prepare a rapid corrosion agent; weighing 4% sodium polyphosphate, 1% sodium bisulfite, 3% methanol and the balance deionized water to prepare a rust layer stabilizer, using a blender to set the stirring speed to 100 revolutions per minute to stir the rapid corrosion agent and the rust layer stabilizer for 10 minutes each;

[0041] 2) surface pretreatment step: shot blasting to remove the surface iron oxide scale of the weathering bridge steel component, so that the surface level of the component reaches Sa2 level;

[0042] 3) first spraying step: using a spraying device to uniformly spray the rapid corrosion agent to the side vertical surface, top surface, bottom surface and other parts of the weathering bridge steel component, using a rolling brush to remove the accumulated liquid on the top surface, bottom surface and other parts;

[0043] 4) blowing step: using a fan to blow the surface of the component, accelerating the reaction of the rapid corrosion agent with the surface of the component, the air volume is 10,000 cubic meters / hour, the blowing time is 3 hours;

[0044] 5) Second spraying step; using spraying equipment to spray the rust layer stabilizer uniformly to the side vertical surface, top surface, bottom surface and other parts of the component, using a rolling brush to remove the accumulated liquid on the top surface, bottom surface and other parts;

[0045] 6) Drying step: placing the component outdoors for 7 days, ventilating and drying, obtaining a brown rust layer with uniform color and no rust liquid flowing on the surface of the component.

[0046] The rust layer thickness of the component surface obtained by the method is 50 μm, the surface rust layer color difference value ΔE of different parts of the component is 10, and the amount of the rust layer on the surface of the component is 15 g / m 2 .

[0047] Example 3

[0048] The rust layer stabilizing treatment agent for the weather-resistant bridge steel component in high-altitude areas is composed of the following components by weight percentage: fast rusting agent: 6% of ferric chloride, 3% of copper sulfate, 1% of hydrogen peroxide, 4% of ethylene glycol, and the balance of deionized water. The rust layer stabilizer is prepared by weighing the mass percentage content of each component: 5% of sodium polyphosphate, 2% of sodium bisulfite, 4% of methanol, and the balance of deionized water.

[0049] Method for using the rust layer stabilizing treatment agent for the weather-resistant bridge steel component in high-altitude areas:

[0050] 1) Preparation step: weighing 6% of ferric chloride, 3% of copper sulfate, 1% of hydrogen peroxide, 4% of ethylene glycol, and the balance of deionized water to prepare a fast rusting agent; weighing 5% of sodium polyphosphate, 2% of sodium bisulfite, 4% of methanol, and the balance of deionized water to prepare a rust layer stabilizer, and using a stirrer to set the stirring speed at 200 revolutions per minute to stir the fast rusting agent and the rust layer stabilizer for 20 minutes each;

[0051] 2) Surface pretreatment step: shot blasting to remove the surface iron oxide scale of the weather-resistant bridge steel component, so that the surface level of the component reaches Sa2 level;

[0052] 3) First spraying step: using spraying equipment to uniformly spray the fast rusting agent to the side vertical surface, top surface, bottom surface and other parts of the weather-resistant bridge steel component, and using a rolling brush to remove the accumulated liquid on the top surface, bottom surface and other parts;

[0053] 4) Blowing step: using a fan to blow the surface of the component to accelerate the reaction between the fast rusting agent and the surface of the component, with a wind volume of 150,000 cubic meters / hour and a blowing time of 5 hours;

[0054] 5) Second spraying step; using spraying equipment to spray the rust layer stabilizer uniformly to the side vertical surface, top surface, bottom surface and other parts of the component, using a rolling brush to remove the accumulated liquid on the top surface, bottom surface and other parts;

[0055] 6) drying step: placing the component outdoors for 10 days, ventilating and drying, forming a brown rust layer with uniform color and no rust liquid flowing on the surface of the weathering bridge steel component.

[0056] The rust layer thickness of the component surface obtained by the method is 70 μm, the surface rust layer color difference value ΔE of different parts of the component is 9, and the surface rust layer amount of the component is 25 g / m 2 .

[0057] Example 4

[0058] The rust layer stabilizing treatment agent for weathering bridge steel components in high-altitude areas is composed of the following components by weight percentage: fast rusting agent: 8% of ferric chloride, 4% of copper sulfate, 0.8% of hydrogen peroxide, 5% of ethylene glycol, and the balance of deionized water. The rust layer stabilizer is prepared by weighing the mass percentage content of each component: 7% of sodium polyphosphate, 2.5% of sodium bisulfite, 3% of methanol, and the balance of deionized water.

[0059] Method for using the rust layer stabilizing treatment agent for weathering bridge steel components in high-altitude areas:

[0060] 1) Preparation step: weighing 8% of ferric chloride, 4% of copper sulfate, 0.8% of hydrogen peroxide, 5% of ethylene glycol, and the balance of deionized water to prepare a fast rusting agent; weighing 7% of sodium polyphosphate, 2.5% of sodium bisulfite, 3% of methanol, and the balance of deionized water to prepare a rust layer stabilizer, and using a stirrer to set the stirring speed to 250 revolutions per minute to stir the fast rusting agent and the rust layer stabilizer for 15 minutes each;

[0061] 2) Surface pretreatment step: shot blasting to remove the surface iron oxide scale of the weathering bridge steel component, so that the component surface level reaches Sa2 level;

[0062] 3) First spraying step: using a spraying device to uniformly spray the fast rusting agent to the side vertical surface, top surface, bottom surface, and other parts of the weathering bridge steel component, and using a rolling brush to remove the accumulated liquid on the top surface, bottom surface, and other parts;

[0063] 4) Blowing step: using a fan to blow the component surface to accelerate the reaction between the fast rusting agent and the component surface, with a wind volume of 120,000 cubic meters / hour and a blowing time of 4 hours;

[0064] 5) Second spraying step: using a spraying device to uniformly spray the rust layer stabilizer to the side vertical surface, top surface, bottom surface, and other parts of the component, and using a rolling brush to remove the accumulated liquid on the top surface, bottom surface, and other parts;

[0065] 6) Drying step: placing the component outdoors for 20 days, ventilating and drying, forming a brown rust layer with uniform color and no rust liquid flowing on the surface of the weathering bridge steel component.

[0066] The rust layer thickness of the component surface obtained by the method is 65 μm, the surface rust layer color difference value ΔE of different parts of the component is 6, and the amount of the rust layer on the surface of the component is 22 g / m 2 .

[0067] Example 5

[0068] The rust layer stabilizing treatment agent for the weather-resistant bridge steel component in a high-altitude area is composed of the following components in percentage by weight: fast rusting agent: 6% of ferric chloride, 3% of copper sulfate, 1.8% of hydrogen peroxide, 4% of ethylene glycol, and the balance of deionized water. The rust layer stabilizer is prepared by weighing the percentage by weight of each component: 5% of sodium polyphosphate, 1.5% of sodium bisulfite, 4.5% of methanol, and the balance of deionized water.

[0069] The use method of the rust layer stabilizing treatment agent for the weather-resistant bridge steel component in a high-altitude area:

[0070] 1) Preparation step: weigh 6% of ferric chloride, 3% of copper sulfate, 1.8% of hydrogen peroxide, 4% of ethylene glycol, and the balance of deionized water according to the percentage by weight to prepare the fast rusting agent; weigh 5% of sodium polyphosphate, 1.5% of sodium bisulfite, 4.5% of methanol, and the balance of deionized water according to the percentage by weight to prepare the rust layer stabilizer, and use a stirrer to set the stirring speed at 180 revolutions per minute to stir the fast rusting agent and the rust layer stabilizer for 26 minutes each;

[0071] 2) Surface pretreatment step: shot blasting is used to remove the surface scale of the weather-resistant bridge steel component to make the surface level of the component reach Sa2 level;

[0072] 3) First spraying step: use a spraying device to uniformly spray the fast rusting agent to the side vertical surface, top surface, bottom surface, and other parts of the weather-resistant bridge steel component, and use a rolling brush to remove the accumulated liquid on the top surface, bottom surface, and other parts;

[0073] 4) Purging step: use a fan to purge the surface of the component to accelerate the reaction between the fast rusting agent and the surface of the component, the air volume is 18,000 cubic meters per hour, and the purging time is 5 hours;

[0074] 5) Second spraying step: use a spraying device to uniformly spray the rust layer stabilizer to the side vertical surface, top surface, bottom surface, and other parts of the component, and use a rolling brush to remove the accumulated liquid on the top surface, bottom surface, and other parts;

[0075] 6) Drying step: place the component outdoors for 25 days for ventilation and drying, and form a brown rust layer with uniform color and no rust liquid flowing on the surface of the weather-resistant bridge steel component.

[0076] The rust layer thickness of the component surface obtained by the method is 70 μm, the surface rust layer color difference value ΔE of different parts of the component is 8, and the amount of the rust layer on the surface of the component is 21 g / m 2 .

[0077] Other parts not described in detail are prior art. Although the above embodiment has made a detailed description of the present application, it is only a part of the embodiment of the present application, not all the embodiments, and people can also obtain other embodiments according to the present embodiment without creativity, which all belong to the protection scope of the present application.

Claims

1. A weathering bridge steel member rust layer stabilizing treatment agent for high altitude regions, characterized by: The quick rusting agent comprises the following components in percentage by weight: ferric trichloride 5-9%, copper sulfate 2-5%, hydrogen peroxide 0.5-2%, ethylene glycol 3-6%, and the rest is deionized water; the rust layer stabilizer comprises the following components in percentage by weight: sodium polyphosphate 4-8%, sodium bisulfite 1-3%, methanol 3-6%, and the rest is deionized water; and the rust layer has a color difference value ΔE of less than or equal to 10.

2. The high-altitude weathering bridge steel member rust layer stabilizing treatment agent according to claim 1, characterized by: The quick rusting agent comprises the following components in percentage by weight: ferric trichloride 6-9%, copper sulfate 3-5%, hydrogen peroxide 0.5-1.8%, ethylene glycol 4-6%, and the rest is deionized water; the rust layer stabilizer comprises the following components in percentage by weight: sodium polyphosphate 5-8%, sodium bisulfite 1.5-3%, methanol 4-6%, and the rest is deionized water.

3. The high-altitude weathering bridge steel member rust layer stabilizing treatment agent according to claim 2, characterized by: The quick rusting agent comprises the following components in percentage by weight: ferric trichloride 9%, copper sulfate 5%, hydrogen peroxide 0.5%, ethylene glycol 6%, and the rest is deionized water; the rust layer stabilizer comprises the following components in percentage by weight: sodium polyphosphate 8%, sodium bisulfite 3%, methanol 6%, and the rest is deionized water.

4. A method for using the rust layer stabilizing treatment agent for a high-altitude weather-resistant bridge steel member according to any one of claims 1 to 3, characterized by: The method comprises the following steps: 1) a material preparation step: ferric trichloride, copper sulfate, hydrogen peroxide, ethylene glycol and deionized water are weighed in percentage by weight, added into a stirrer, and stirred to obtain a quick rusting agent; sodium polyphosphate, sodium bisulfite, methanol and deionized water are weighed in percentage by weight, added into a stirrer, and stirred to obtain a rust layer stabilizer; 2) a surface pretreatment step: removing the surface iron oxide scale of the weathering bridge steel member; 3) a first spraying step: using a spraying device to uniformly spray the quick rusting agent to the surface of the weathering bridge steel member, and then using a rolling brush to remove the accumulated liquid on the surface; 4) a blowing step: using a fan to blow the surface of the weathering bridge steel member to accelerate the reaction of the quick rusting agent with the surface of the weathering bridge steel member; 5) a second spraying step: using a spraying device to uniformly spray the rust layer stabilizer to the surface of the weathering bridge steel member, and using a rolling brush to remove the accumulated liquid on the surface; 6) a drying step: placing the weathering bridge steel member outdoors for 7-30 days, and ventilating and drying to obtain a brown rust layer with uniform color and no rust liquid flowing on the surface of the member.

5. The method of using a high-altitude weathering bridge steel component rust layer stabilizing treatment agent according to claim 4, characterized in that: In the step 1), the stirring rate of the stirrer is 100-300 revolutions per minute, and the stirring time is 10-30 minutes.

6. The method of using a high-altitude weathering bridge steel component rust layer stabilizing treatment agent according to claim 4, characterized in that: In the step 2), the surface pretreatment step is shot blasting treatment, so that the surface level of the member reaches the Sa2 level.

7. The method of using a high-altitude weathering bridge steel component rust layer stabilizing treatment agent according to claim 4, characterized by: In the step 4), the air volume of the fan is not less than 10,000 cubic meters per hour.

8. The method of claim 7, wherein the method further comprises: applying a protective coating to the steel member. In the step 4), the blowing time is 3-6 hours.

9. The method of using a high-altitude weather-resistant bridge steel member rust layer stabilizing treatment agent according to any one of claims 5 to 8, characterized by: The final component rust layer obtained in step 6) has the following technical parameters: (1) the thickness of the component surface rust layer is ≥ 50 μm; (2) the color difference value ΔE of the surface rust layer at different parts of the component is ≤ 10; (3) the amount of the component surface rust layer is ≥ 15 g / m 2 .