CN111020553A - Surface treatment method of hot-rolled ribbed steel bar - Google Patents
Surface treatment method of hot-rolled ribbed steel bar Download PDFInfo
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- CN111020553A CN111020553A CN201911335962.1A CN201911335962A CN111020553A CN 111020553 A CN111020553 A CN 111020553A CN 201911335962 A CN201911335962 A CN 201911335962A CN 111020553 A CN111020553 A CN 111020553A
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- hot
- ribbed steel
- rolled ribbed
- saponification
- phosphating
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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
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/78—Pretreatment of the material to be coated
-
- 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
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention relates to the technical field of surface treatment of hot-rolled steel bars, in particular to a surface treatment method of a hot-rolled ribbed steel bar, which comprises the following steps: firstly, putting hot-rolled ribbed steel bars into a shot blasting machine for shot blasting treatment; secondly, binding the hot-rolled ribbed steel bars, and then hanging the steel bars into a pickling tank for pickling; thirdly, washing for a plurality of times by high-pressure water after the acid washing is finished; fourthly, hanging the hot-rolled ribbed steel bars into a phosphating pool for phosphating; fifthly, washing for a plurality of times by high-pressure water after phosphorization is finished; sixthly, after the high-pressure water washing is finished, hanging the hot-rolled ribbed steel bar into a saponification tank for saponification treatment; seventhly, after saponification, scalding; and step eight, air-drying the indoor air-drying. The process method provided by the invention can ensure that the surface of the hot-rolled ribbed steel bar is treated cleanly and has no dead angle.
Description
Technical Field
The invention relates to the technical field of surface treatment of hot-rolled steel bars, in particular to a surface treatment method of a hot-rolled ribbed steel bar.
Background
The hot-rolled ribbed steel bar has the advantages of corrosion resistance, high strength and the like, and is widely applied to the fields of buildings, bridges, ocean engineering and the like. However, because the surface of the steel bar is provided with the longitudinal ribs or the transverse ribs, the phenomena of cleaning dead corners and no cleaning are easy to occur during the treatment, thereby affecting the surface quality of the hot-rolled ribbed steel bar, and leading the hot-rolled ribbed steel bar to be subjected to surface corrosion or corrosion and the like frequently due to incomplete surface treatment in the later application process.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a surface treatment method of hot-rolled ribbed steel bars, which has clean surface treatment and no dead angle.
The invention is realized by the following technical scheme:
a surface treatment method of hot-rolled ribbed steel bars comprises the following steps:
the first step, putting the hot-rolled ribbed steel bar into a shot blasting machine for shot blasting treatment, wherein the shot blasting granularity is 0.1-0.5mm, the shot blasting speed is 80-120m/s, and the shot blasting flow is 100-;
secondly, acid pickling, namely hanging the hot-rolled ribbed steel bars into an acid pickling tank after binding, carrying out acid pickling by adopting a hydrochloric acid solution with the mass concentration of 170-230 g/L, the mass concentration of ferrous ions of less than 120g/L and the temperature of 30-60 ℃, and carrying out acid pickling on the hot-rolled ribbed steel bars by using a vortex pump in the acid pickling tank to generate a vortex in a water body in the acid pickling process for 10-20 min;
thirdly, washing for a plurality of times by high-pressure water after the acid washing is finished;
fourthly, after high-pressure water washing, hanging the hot-rolled ribbed steel bars into a phosphating tank for phosphating, wherein medium-temperature phosphating is adopted for phosphating, the total acidity of phosphating solution is 130-150 points, the free acidity is 13-18 points, the total zinc content is 40-60 g/L, the phosphating temperature is 70-80 ℃, and the phosphating time is 8-10 min, and similarly, a vortex pump in the phosphating tank generates vortex in a water body during phosphating to phosphatize the hot-rolled ribbed steel bars;
fifthly, washing for a plurality of times by high-pressure water after phosphorization is finished;
sixthly, after the high-pressure water washing is finished, hanging the hot-rolled ribbed steel bar into a saponification tank for saponification, wherein the saponification adopts medium-temperature saponification, the mass concentration of sodium hydroxide in saponification liquid is 130-260 g/L, the temperature is 80-90 ℃, the saponification time is 20-30 min, and similarly, an eddy pump in the saponification tank generates eddy current in the saponification process to saponify the hot-rolled ribbed steel bar;
seventhly, after saponification, scalding;
eighth step, air drying in the air drying chamber, wherein the rotating speed of a fan in the air drying chamber is 2000-2800r/min, and the air volume is 500-800m3/h。
Furthermore, sodium lignosulfonate and amino trihydric alcohol are added into the hydrochloric acid solution.
The invention has the advantages of
The surface treatment method of the hot-rolled ribbed steel bar protected by the invention comprises the steps of putting the hot-rolled ribbed steel bar into a shot blasting machine for shot blasting treatment, and then carrying out acid washing, phosphating and saponification treatment, wherein the surface and dead corners of the hot-rolled ribbed steel bar can be pretreated; the surface stain and corrosion are removed completely, then acidification, phosphorization and saponification treatment are carried out, in the treatment process, a vortex is generated by a water body through a vortex pump to treat the surface of the hot-rolled ribbed steel bar, the surface of the hot-rolled ribbed steel bar can be quickly and thoroughly subjected to anticorrosion treatment, the surface of the hot-rolled ribbed steel bar can be conveniently galvanized or subjected to other treatments in the later period and then applied to buildings, bridges and other constructions, and the corrosion resistance of the surface of steel is improved.
After each process, washing for a plurality of times by adopting high-pressure water; can wash the stains on the surface more cleanly and thoroughly. And after acid cleaning, phosphating is carried out, and then saponification treatment is carried out, so that the binding force between a later-stage coating film layer and a coating film and the hot-rolled ribbed steel bar can be enhanced, the corrosion resistance of the surface of the hot-rolled ribbed steel bar is improved, acid liquor which is not cleaned in the acid cleaning process can be further neutralized by saponification, the lubricity of the surface is improved, stains are prevented from being stained, and the later-stage processing treatment is facilitated.
Detailed Description
A surface treatment method of hot-rolled ribbed steel bars comprises the following steps:
the first step, putting the hot-rolled ribbed steel bar into a shot blasting machine for shot blasting treatment, wherein the shot blasting granularity is 0.1-0.5mm, the shot blasting speed is 80-120m/s, and the shot blasting flow is 100-;
secondly, acid pickling, namely hanging the hot-rolled ribbed steel bars into an acid pickling tank after binding, carrying out acid pickling by adopting a hydrochloric acid solution with the mass concentration of 170-230 g/L, the mass concentration of ferrous ions of less than 120g/L and the temperature of 30-60 ℃, and carrying out acid pickling on the hot-rolled ribbed steel bars by using a vortex pump in the acid pickling tank to generate a vortex in a water body in the acid pickling process for 10-20 min;
thirdly, washing for a plurality of times by high-pressure water after the acid washing is finished;
fourthly, after high-pressure water washing, hanging the hot-rolled ribbed steel bars into a phosphating tank for phosphating, wherein medium-temperature phosphating is adopted for phosphating, the total acidity of phosphating solution is 130-150 points, the free acidity is 13-18 points, the total zinc content is 40-60 g/L, the phosphating temperature is 70-80 ℃, and the phosphating time is 8-10 min, and similarly, a vortex pump in the phosphating tank generates vortex in a water body during phosphating to phosphatize the hot-rolled ribbed steel bars;
fifthly, washing for a plurality of times by high-pressure water after phosphorization is finished;
sixthly, after the high-pressure water washing is finished, hanging the hot-rolled ribbed steel bar into a saponification tank for saponification, wherein the saponification adopts medium-temperature saponification, the mass concentration of sodium hydroxide in saponification liquid is 130-260 g/L, the temperature is 80-90 ℃, the saponification time is 20-30 min, and similarly, an eddy pump in the saponification tank generates eddy current in the saponification process to saponify the hot-rolled ribbed steel bar;
seventhly, after saponification, scalding;
eighth, air drying the indoor airThe rotating speed of the fan in the dry chamber is 2000-2800r/min, and the air quantity is 500-800m3/h。
Furthermore, sodium lignosulfonate and amino trihydric alcohol are added into the hydrochloric acid solution, the sodium lignosulfonate can improve the viscosity of the hydrochloric acid solution, the amino trihydric alcohol can improve the wettability of the hydrochloric acid solution, the pickling process is quicker, the cleaning is cleaner and more thorough, and no dead angle exists.
The surface of the hot-rolled ribbed steel bar is treated by adopting the treatment process, the hot-rolled ribbed steel bar is put into a shot blasting machine for shot blasting treatment and then subjected to acid cleaning, phosphating and saponification treatment, and the surface and dead corners of the hot-rolled ribbed steel bar can be pretreated; the surface stain and corrosion are removed completely, then acidification, phosphorization and saponification treatment are carried out, in the treatment process, a vortex is generated by a water body through a vortex pump to treat the surface of the hot-rolled ribbed steel bar, the surface of the hot-rolled ribbed steel bar can be quickly and thoroughly subjected to anticorrosion treatment, the surface of the hot-rolled ribbed steel bar can be conveniently galvanized or subjected to other treatments in the later period and then applied to buildings, bridges and other constructions, and the corrosion resistance of the surface of steel is improved.
After each process, washing for a plurality of times by adopting high-pressure water; can wash the stains on the surface more cleanly and thoroughly. And after acid cleaning, phosphating is carried out, and then saponification treatment is carried out, so that the binding force between a later-stage coating film layer and a coating film and the hot-rolled ribbed steel bar can be enhanced, the corrosion resistance of the surface of the hot-rolled ribbed steel bar is improved, acid liquor which is not cleaned in the acid cleaning process can be further neutralized by saponification, the lubricity of the surface is improved, stains are prevented from being stained, and the later-stage processing treatment is facilitated.
In conclusion, the surface treatment method for the hot-rolled ribbed steel bar, which is protected by the invention, can ensure that the surface treatment of the hot-rolled ribbed steel bar is clean and has no dead angle.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (2)
1. A surface treatment method of hot-rolled ribbed steel bars is characterized by comprising the following steps:
the first step, putting the hot-rolled ribbed steel bar into a shot blasting machine for shot blasting treatment, wherein the shot blasting granularity is 0.1-0.5mm, the shot blasting speed is 80-120m/s, and the shot blasting flow is 100-;
secondly, acid pickling, namely hanging the hot-rolled ribbed steel bars into an acid pickling tank after binding, carrying out acid pickling by adopting a hydrochloric acid solution with the mass concentration of 170-230 g/L, the mass concentration of ferrous ions of less than 120g/L and the temperature of 30-60 ℃, and carrying out acid pickling on the hot-rolled ribbed steel bars by using a vortex pump in the acid pickling tank to generate a vortex in a water body in the acid pickling process for 10-20 min;
thirdly, washing for a plurality of times by high-pressure water after the acid washing is finished;
fourthly, after high-pressure water washing, hanging the hot-rolled ribbed steel bars into a phosphating tank for phosphating, wherein medium-temperature phosphating is adopted for phosphating, the total acidity of phosphating solution is 130-150 points, the free acidity is 13-18 points, the total zinc content is 40-60 g/L, the phosphating temperature is 70-80 ℃, and the phosphating time is 8-10 min, and similarly, a vortex pump in the phosphating tank generates vortex in a water body during phosphating to phosphatize the hot-rolled ribbed steel bars;
fifthly, washing for a plurality of times by high-pressure water after phosphorization is finished;
sixthly, after the high-pressure water washing is finished, hanging the hot-rolled ribbed steel bar into a saponification tank for saponification, wherein the saponification adopts medium-temperature saponification, the mass concentration of sodium hydroxide in saponification liquid is 130-260 g/L, the temperature is 80-90 ℃, the saponification time is 20-30 min, and similarly, an eddy pump in the saponification tank generates eddy current in the saponification process to saponify the hot-rolled ribbed steel bar;
seventhly, after saponification, scalding;
eighth step, air drying in the air drying chamber, wherein the rotating speed of a fan in the air drying chamber is 2000-2800r/min, and the air volume is 500-800m3/h。
2. The surface treatment method of a hot-rolled ribbed steel bar according to claim 1, wherein sodium lignosulfonate and amino trihydric alcohol are added to the hydrochloric acid solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911335962.1A CN111020553A (en) | 2019-12-23 | 2019-12-23 | Surface treatment method of hot-rolled ribbed steel bar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911335962.1A CN111020553A (en) | 2019-12-23 | 2019-12-23 | Surface treatment method of hot-rolled ribbed steel bar |
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| CN111020553A true CN111020553A (en) | 2020-04-17 |
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| CN201911335962.1A Pending CN111020553A (en) | 2019-12-23 | 2019-12-23 | Surface treatment method of hot-rolled ribbed steel bar |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114161320A (en) * | 2021-11-12 | 2022-03-11 | 广州广钢新材料股份有限公司 | Surface treatment method and system for hot-rolled ribbed steel bar |
| CN115404475A (en) * | 2021-05-28 | 2022-11-29 | 宝山钢铁股份有限公司 | Steel plate pickling process with excellent phosphating performance |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115404475A (en) * | 2021-05-28 | 2022-11-29 | 宝山钢铁股份有限公司 | Steel plate pickling process with excellent phosphating performance |
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Application publication date: 20200417 |
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