CN114774942A - Stainless steel pipe surface treating agent and preparation method and application thereof - Google Patents
Stainless steel pipe surface treating agent and preparation method and application thereof Download PDFInfo
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- CN114774942A CN114774942A CN202111642551.4A CN202111642551A CN114774942A CN 114774942 A CN114774942 A CN 114774942A CN 202111642551 A CN202111642551 A CN 202111642551A CN 114774942 A CN114774942 A CN 114774942A
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- stainless steel
- steel pipe
- treating agent
- acid
- polyoxyethylene ether
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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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents
- C23G5/06—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents using emulsions
-
- 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
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
- C23G1/088—Iron or steel solutions containing organic acids
Abstract
The invention relates to a stainless steel tube surface treating agent, a preparation method and application thereof, and belongs to the technical field of stainless steel surface treatment. The stainless steel pipe surface treating agent comprises the following raw material components in percentage by mass: 15-20% of lactic acid, 10-15% of tartaric acid, 8-15% of coconut oil alcohol polyoxyethylene ether, 5-10% of fatty acid polyoxyethylene ether, 5-10% of polyglutamic acid, 2-4% of methylbenzotriazole, 8-15% of propylene glycol and the balance of water. The environment-friendly acidic rust remover is compounded with the organic passivator and other components, so that the environment-friendly acidic rust remover is environment-friendly and odorless, and the operation process is simple. The stainless steel has the advantages of super-strong cleaning and decontamination effects, rapid rust dissolving and scale removing performance, and uniform silvery white surface.
Description
Technical Field
The invention relates to the technical field of stainless steel surface treatment, in particular to a stainless steel pipe surface treating agent and a preparation method and application thereof.
Background
A seamless stainless steel pipe is a long steel bar having a hollow cross section and no seam at the periphery. The rolling method of cold-drawn (rolled) seamless steel tube is complex, after the round tube blank is hollowed, the round tube blank is headed, annealed, and after the round tube blank is annealed, the round tube blank is undergone the process of pickling and passivating treatment by using special surface treatment agent so as to remove the dirt of greasy dirt, rust stain, oxide layer and free iron from surface of workpiece, and after the round tube blank is undergone the process of pickling and passivating treatment, the surface of the round tube blank is changed into uniform silvery white. The existing common stainless steel acidic passivation treating agent takes nitric acid and hydrofluoric acid as main pickling main agents, and the product has low cost and good stainless steel treating effect and is the most traditional treating agent at present. However, the product easily emits yellow smoke in the using process, generates toxic and harmful nitric oxide gas such as nitric oxide, nitrogen dioxide and the like, and the working solution has strong corrosivity to the skin. Although many of the current formulations mitigate the environmental and human hazards by reducing the amounts of nitric acid and hydrofluoric acid, or by adding acid mist inhibitors, they have not been completely eradicated. Meanwhile, the nitric acid and the hydrofluoric acid have over-passivation corrosion on a precise seamless steel pipe no matter the concentration, so the proposal is not suggested for a more precise stainless steel pipe.
Disclosure of Invention
In order to solve the technical problems, the invention provides a stainless steel pipe surface treating agent and a preparation method and application thereof. The environment-friendly rust remover is compounded with the organic passivator and other components, no toxic or harmful component is added, the operation process is simple, and oil stains, oxide skins, free iron ions and the like generated on the surface of the stainless steel pipe are removed in the using process.
The first purpose of the invention is to provide a surface treating agent for stainless steel pipes, which comprises the following raw material components in percentage by mass: 15-20% of lactic acid, 10-15% of tartaric acid, 8-15% of coconut oil alcohol polyoxyethylene ether, 5-10% of fatty acid polyoxyethylene ether, 5-10% of polyglutamic acid, 2-4% of methylbenzotriazole, 8-15% of propylene glycol and the balance of water.
In one embodiment of the invention, the polyglutamic acid has a molecular weight of 400kDa to 600 kDa.
The second purpose of the invention is to provide a preparation method of the stainless steel pipe surface treating agent, which comprises the following steps,
(1) adding lactic acid, tartaric acid, coconut oil alcohol polyoxyethylene ether, fatty acid polyoxyethylene ether and polyglutamic acid into water, heating and stirring, and reacting completely to obtain a mixed solution;
(2) and (2) adding methylbenzotriazole and propylene glycol into the mixed solution obtained in the step (1), heating and stirring, and obtaining the stainless steel pipe surface treating agent after complete reaction.
In one embodiment of the present invention, in the step (1), the heating temperature is 100-120 ℃.
In one embodiment of the present invention, in the step (2), the temperature of the heating is 50 to 70 ℃.
In one embodiment of the present invention, in steps (1) and (2), the stirring time is 50-70 min.
In one embodiment of the invention, the method further comprises cooling to 20-40 ℃.
The third purpose of the invention is to provide an application of the treating agent in the surface treatment of the stainless steel pipe, which comprises the following steps of soaking a stainless steel pipe workpiece in the treating agent solution, taking out, washing with water and drying.
In one embodiment of the invention, the soaking time is 20-40 min. Soaking the surface treating agent for the steel, treating at normal temperature for about 30min, properly adjusting the treatment proportion and the treatment time according to the treatment effect, and properly supplementing stock solution when the treatment time is prolonged so as to maintain the pickling effect; the two rinsing tanks, which are replaced by running water at least once a day, particularly the cleanliness of the last rinsing, is related to the watermark of the final product and the cleaning effect of the surface of the product.
In one embodiment of the invention, the water washing is washing in flowing water, and the time of the water washing is 5-10 min.
In one embodiment of the present invention, the number of the water washing is 2 to 4.
Compared with the prior art, the technical scheme of the invention has the following advantages:
(1) the stainless steel pipe treating agent disclosed by the invention achieves the effects of removing rust and scale by compounding acid auxiliaries such as lactic acid and tartaric acid, and achieves the effects and efficiency of a nitric acid and hydrofluoric acid system; the coconut oil alcohol polyoxyethylene ether is compounded to improve the penetration and oil removal effect.
(2) The stainless steel pipe treating agent disclosed by the invention is compounded with coconut oil alcohol polyoxyethylene ether to improve the penetrating oil removal effect, and the fatty acid polyoxyethylene ether has an emulsifying effect on oil stains.
(3) The stainless steel pipe treating agent can help to dissolve polyglutamic acid and methylbenzotriazole in a propylene glycol system, complex metal ions are adsorbed on the surface of stainless steel, air and oxygen are isolated, a layer of transparent organic passivation film is formed, the stainless steel cannot turn yellow after acid cleaning, secondary oxygen corrosion cannot be generated, the surface corrosion resistance of a stainless steel product is improved, and the service life is prolonged.
(4) The stainless steel pipe treating agent is compounded by components such as an environment-friendly acidic rust remover, an organic passivator and the like, is environment-friendly and odorless, and is simple in operation process. The stainless steel cleaning agent has super strong cleaning and decontaminating effects, can quickly dissolve rust and remove oxide skin, and can ensure that the surface of the stainless steel is uniform silvery white.
Detailed Description
The present invention is further described below in conjunction with specific examples to enable those skilled in the art to better understand the present invention and to practice it, but the examples are not intended to limit the present invention.
Example 1
A stainless steel pipe surface treating agent and a preparation method and application thereof are disclosed, wherein the surface treating agent comprises the following raw material components in parts by weight:
17g of lactic acid, 12g of tartaric acid, 12g of coconut oil alcohol polyoxyethylene ether, 7g of fatty acid polyoxyethylene ether, 7g of polyglutamic acid (500kDa), 3g of methyl benzotriazole, 12g of 1, 3-propylene glycol and 30g of water.
The method comprises the following specific steps:
(1) adding the calculated and weighed water into a reaction kettle, starting a stirrer, then sequentially and slowly adding the calculated and weighed lactic acid, tartaric acid, coconut oil alcohol polyoxyethylene ether, fatty acid polyoxyethylene ether and polyglutamic acid into the reaction kettle, heating to 110 ℃, and continuously stirring for 1 h;
(2) then sequentially adding methylbenzotriazole and 1, 3-propylene glycol, adjusting the temperature to 60 ℃ after all the raw materials are added, continuing stirring for 1h, cooling to room temperature, sampling, analyzing, discharging and packaging to obtain the stainless steel tube surface treating agent.
Placing a workpiece to be treated of the stainless steel pipe with rust and oil stains in a stainless steel pipe surface treating agent, soaking at normal temperature for 30min, washing with constant-temperature water for 2 times for 8min, and drying. The rust and oil removing rate of the treated stainless steel pipe workpiece can reach 99%.
And (3) carrying out a neutral salt spray test on the treated stainless steel pipe workpiece, spraying 5 wt% of NaCl aqueous solution and saline with the pH value of 7 by using a spraying device, and resisting neutral salt spray for 96 h.
Example 2
A stainless steel pipe surface treating agent and a preparation method and application thereof are disclosed, wherein the surface treating agent comprises the following raw material components in parts by weight:
15g of lactic acid, 10g of tartaric acid, 8g of coconut oil alcohol polyoxyethylene ether, 10g of fatty acid polyoxyethylene ether, 10g of polyglutamic acid (400kDa), 4g of methyl benzotriazole, 15g of 1, 2-propylene glycol and 28g of water.
The method comprises the following specific steps:
(1) adding the calculated and weighed water into a reaction kettle, starting a stirrer, then sequentially and slowly adding the calculated and weighed lactic acid, tartaric acid, coconut oil alcohol polyoxyethylene ether, fatty acid polyoxyethylene ether and polyglutamic acid into the reaction kettle, heating to 100 ℃, and continuously stirring for 70 min;
(2) then sequentially adding methylbenzotriazole and 1, 2-propylene glycol, adjusting the temperature to 55 ℃ after all the raw materials are added, continuing stirring for 65min, cooling to room temperature, sampling, analyzing, discharging and packaging to obtain the stainless steel tube surface treating agent.
Placing the workpiece to be treated of the stainless steel pipe with the same rust and oil stain in the surface treating agent of the stainless steel pipe, soaking at normal temperature for 30min, washing with constant-temperature water for 2 times for 8min, and drying. The rust and oil removing rate of the treated stainless steel pipe workpiece can reach 97 percent.
And (3) carrying out a neutral salt spray test on the treated stainless steel pipe workpiece, spraying 5 wt% of NaCl aqueous solution and saline with the pH value of 7 through a spraying device, and resisting neutral salt spray for 88 h.
Example 3
A stainless steel pipe surface treating agent and a preparation method and application thereof are disclosed, wherein the surface treating agent comprises the following raw material components in parts by weight:
20g of lactic acid, 15g of tartaric acid, 15g of coconut oil alcohol polyoxyethylene ether, 5g of fatty acid polyoxyethylene ether, 5g of polyglutamic acid (600kDa), 2g of methyl benzotriazole, 8g of 1, 2-propylene glycol and 30g of water.
The method comprises the following specific steps:
(1) adding the calculated and weighed water into a reaction kettle, starting a stirrer, then sequentially and slowly adding the calculated and weighed lactic acid, tartaric acid, coconut oil alcohol polyoxyethylene ether, fatty acid polyoxyethylene ether and polyglutamic acid into the reaction kettle, heating to 120 ℃, and continuously stirring for 50 min;
(2) then sequentially adding methylbenzotriazole and 1, 2-propylene glycol, adjusting the temperature to 55 ℃ after all the raw materials are added, continuing stirring for 55min, cooling to room temperature, sampling, analyzing, discharging and packaging to obtain the stainless steel tube surface treating agent.
Placing the workpiece to be treated of the stainless steel pipe with the same rust and oil stain in the surface treating agent of the stainless steel pipe, soaking at normal temperature for 30min, washing with constant-temperature water for 2 times for 8min, and drying. The rust and oil removing rate of the treated stainless steel pipe workpiece can reach 95%.
And (3) carrying out a neutral salt spray test on the treated stainless steel pipe workpiece, spraying 5 wt% of NaCl aqueous solution and saline with the pH value of 7 through a spraying device, and resisting neutral salt spray for 90 hours.
Comparative example 1
Basically the same as example 1, except that no polyglutamic acid is added, the raw material components and the parts by mass are as follows:
17g of lactic acid, 12g of tartaric acid, 12g of coconut oil alcohol polyoxyethylene ether, 7g of fatty acid polyoxyethylene ether, 3g of methyl benzotriazole, 12g of 1, 3-propylene glycol and 30g of water.
The method comprises the following specific steps:
(1) adding the calculated and weighed water into a reaction kettle, starting a stirrer, then sequentially and slowly adding the calculated and weighed lactic acid, tartaric acid, coconut oil alcohol polyoxyethylene ether and fatty acid polyoxyethylene ether into the reaction kettle, heating to 110 ℃, and continuously stirring for 1 h;
(2) sequentially adding methylbenzotriazole and 1, 3-propylene glycol, adjusting the temperature to 60 ℃ after all the raw materials are added, continuing stirring for 1h, cooling to room temperature, sampling, analyzing to be qualified, discharging and packaging to obtain the stainless steel pipe surface treating agent.
Placing a workpiece to be processed of the stainless steel pipe with the same rust and oil stain in the surface treating agent of the stainless steel pipe, soaking at normal temperature for 30min, washing with constant-temperature water for 2 times for 8min, and drying. The rust and oil removing rate of the treated stainless steel pipe workpiece can reach 87%.
And (3) carrying out a neutral salt spray test on the treated stainless steel pipe workpiece, spraying 5 wt% of NaCl aqueous solution and saline with the pH value of 7 by using a spraying device, and resisting neutral salt spray for 32 hours.
Comparative example 2
Basically the same as example 1, except that no coconut oil alcohol polyoxyethylene ether is added, the raw material components and the parts by mass are as follows:
17g of lactic acid, 12g of tartaric acid, 7g of fatty acid polyoxyethylene ether, 7g of polyglutamic acid (500kDa), 3g of methylbenzotriazole, 12g of 1, 3-propanediol and 30g of water.
The method comprises the following specific steps:
(1) adding the calculated and weighed water into a reaction kettle, starting a stirrer, then sequentially and slowly adding the calculated and weighed lactic acid, tartaric acid, fatty acid polyoxyethylene ether and polyglutamic acid into the reaction kettle, heating to 110 ℃, and continuously stirring for 1 h;
(2) then sequentially adding methylbenzotriazole and 1, 3-propylene glycol, adjusting the temperature to 60 ℃ after all the raw materials are added, continuing stirring for 1h, cooling to room temperature, sampling, analyzing, discharging and packaging to obtain the stainless steel tube surface treating agent.
Placing the workpiece to be treated of the stainless steel pipe with the same rust and oil stain in the surface treating agent of the stainless steel pipe, soaking at normal temperature for 30min, washing with constant-temperature water for 2 times for 8min, and drying. The rust and oil removing rate of the treated stainless steel pipe workpiece can reach 85%.
And (3) carrying out a neutral salt spray test on the treated stainless steel pipe workpiece, spraying 5 wt% of NaCl aqueous solution and saline with the pH value of 7 through a spraying device, and resisting neutral salt spray for 40 h.
Comparative example 3
The method is basically the same as example 1, except that no lactic acid is added, and the raw material components and the parts by mass are as follows:
12g of tartaric acid, 12g of coconut oil alcohol polyoxyethylene ether, 7g of fatty acid polyoxyethylene ether, 7g of polyglutamic acid (500kDa), 3g of methyl benzotriazole, 12g of 1, 3-propylene glycol and 30g of water.
The method comprises the following specific steps:
(1) adding the calculated and weighed water into a reaction kettle, starting a stirrer, then sequentially and slowly adding the calculated and weighed tartaric acid, the coconut oil alcohol polyoxyethylene ether, the fatty acid polyoxyethylene ether and the polyglutamic acid into the reaction kettle, heating to 110 ℃, and continuously stirring for 1 h;
(2) sequentially adding methylbenzotriazole and 1, 3-propylene glycol, adjusting the temperature to 60 ℃ after all the raw materials are added, continuing stirring for 1h, cooling to room temperature, sampling, analyzing to be qualified, discharging and packaging to obtain the stainless steel pipe surface treating agent.
Placing a workpiece to be processed of the stainless steel pipe with the same rust and oil stain in the surface treating agent of the stainless steel pipe, soaking at normal temperature for 30min, washing with constant-temperature water for 2 times for 8min, and drying. The rust and oil removing rate of the treated stainless steel pipe workpiece can reach 82%.
And (3) carrying out a neutral salt spray test on the treated stainless steel pipe workpiece, spraying 5 wt% of NaCl aqueous solution and saline with the pH value of 7 through a spraying device, and resisting neutral salt spray for 34 h.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Various other modifications and alterations will occur to those skilled in the art upon reading the foregoing description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.
Claims (10)
1. The surface treating agent for the stainless steel pipe is characterized by comprising the following raw materials in percentage by mass: 15-20% of lactic acid, 10-15% of tartaric acid, 8-15% of coconut oil alcohol polyoxyethylene ether, 5-10% of fatty acid polyoxyethylene ether, 5-10% of polyglutamic acid, 2-4% of methylbenzotriazole, 8-15% of propylene glycol and the balance of water.
2. The surface treatment agent for stainless steel pipes according to claim 1, wherein the polyglutamic acid has a molecular weight of 400-600 kDa.
3. The method of producing a surface treating agent for a stainless steel pipe according to claim 1 or 2, comprising the steps of,
(1) adding lactic acid, tartaric acid, coconut oil alcohol polyoxyethylene ether, fatty acid polyoxyethylene ether and polyglutamic acid into water, heating and stirring, and reacting completely to obtain a mixed solution;
(2) and (2) adding methylbenzotriazole and propylene glycol into the mixed solution obtained in the step (1), heating and stirring, and obtaining the stainless steel pipe surface treating agent after complete reaction.
4. The method for preparing the surface treating agent for stainless steel pipe as claimed in claim 3, wherein the heating temperature in step (1) is 100-120 ℃.
5. The method for preparing a surface treatment agent for stainless steel pipes according to claim 3, wherein the heating temperature in step (2) is 50 to 70 ℃.
6. The method for preparing a surface treatment agent for stainless steel pipes according to claim 3, wherein the stirring time in steps (1) and (2) is 50-70 min.
7. The method of claim 3, further comprising cooling to 20-40 ℃.
8. The use of the treating agent according to claim 1 or 2 for the surface treatment of a stainless steel pipe, comprising the steps of immersing a stainless steel pipe workpiece in the treating agent solution, taking out the workpiece, washing the workpiece with water, and drying the workpiece.
9. Use of a treatment agent according to claim 8 in the surface treatment of stainless steel pipes, characterized in that: the soaking time is 20-40 min.
10. Use of a treatment agent according to claim 8 in the surface treatment of stainless steel pipes, characterized in that: the water washing is carried out in flowing water for 5-10 min.
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| CN202111642551.4A CN114774942A (en) | 2021-12-29 | 2021-12-29 | Stainless steel pipe surface treating agent and preparation method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111642551.4A CN114774942A (en) | 2021-12-29 | 2021-12-29 | Stainless steel pipe surface treating agent and preparation method and application thereof |
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Citations (8)
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| CN1123253A (en) * | 1994-09-12 | 1996-05-29 | 罗姆和哈斯公司 | Method of inhibiting corrosion in aqueous systems using poly(amino acids) |
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| CN105177600A (en) * | 2015-08-21 | 2015-12-23 | 无锡乐华自动化科技有限公司 | Rust remover |
| EP2963101A1 (en) * | 2014-07-04 | 2016-01-06 | Kolb Distribution Ltd. | Hard surface cleaners |
| CN107083553A (en) * | 2016-12-12 | 2017-08-22 | 大唐东北电力试验研究所有限公司 | Industrial heat power equipment Fouling Cleaning protective agent and preparation method thereof |
| CN111254447A (en) * | 2020-03-24 | 2020-06-09 | 太仓市宝马环境工程有限公司 | Neutral rust removal passivation cleaning agent and use method thereof |
| CN111892996A (en) * | 2020-08-13 | 2020-11-06 | 华阳-恩赛有限公司 | Phosphorus-free acidic cleaning agent, preparation method and application thereof |
| CN111926338A (en) * | 2020-07-14 | 2020-11-13 | 苏州绿水清洗科技有限公司 | Stainless steel cleaning passivator and application thereof |
-
2021
- 2021-12-29 CN CN202111642551.4A patent/CN114774942A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1123253A (en) * | 1994-09-12 | 1996-05-29 | 罗姆和哈斯公司 | Method of inhibiting corrosion in aqueous systems using poly(amino acids) |
| EP2963101A1 (en) * | 2014-07-04 | 2016-01-06 | Kolb Distribution Ltd. | Hard surface cleaners |
| CN104310600A (en) * | 2014-10-14 | 2015-01-28 | 广州特种承压设备检测研究院 | Environment-friendly composite water treatment agent and application thereof |
| CN105177600A (en) * | 2015-08-21 | 2015-12-23 | 无锡乐华自动化科技有限公司 | Rust remover |
| CN107083553A (en) * | 2016-12-12 | 2017-08-22 | 大唐东北电力试验研究所有限公司 | Industrial heat power equipment Fouling Cleaning protective agent and preparation method thereof |
| CN111254447A (en) * | 2020-03-24 | 2020-06-09 | 太仓市宝马环境工程有限公司 | Neutral rust removal passivation cleaning agent and use method thereof |
| CN111926338A (en) * | 2020-07-14 | 2020-11-13 | 苏州绿水清洗科技有限公司 | Stainless steel cleaning passivator and application thereof |
| CN111892996A (en) * | 2020-08-13 | 2020-11-06 | 华阳-恩赛有限公司 | Phosphorus-free acidic cleaning agent, preparation method and application thereof |
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