CN112210804A - Cold-rolled steel strip corrosion prevention process - Google Patents
Cold-rolled steel strip corrosion prevention process Download PDFInfo
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- CN112210804A CN112210804A CN202010951915.6A CN202010951915A CN112210804A CN 112210804 A CN112210804 A CN 112210804A CN 202010951915 A CN202010951915 A CN 202010951915A CN 112210804 A CN112210804 A CN 112210804A
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D7/00—Electroplating characterised by the article coated
- C25D7/06—Wires; Strips; Foils
- C25D7/0614—Strips or foils
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
- C25D3/562—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of iron or nickel or cobalt
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
- C25D3/565—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of zinc
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/56—Electroplating: Baths therefor from solutions of alloys
- C25D3/58—Electroplating: Baths therefor from solutions of alloys containing more than 50% by weight of copper
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/10—Electroplating with more than one layer of the same or of different metals
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
- C25D5/36—Pretreatment of metallic surfaces to be electroplated of iron or steel
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/48—After-treatment of electroplated surfaces
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating Methods And Accessories (AREA)
Abstract
The invention discloses an anticorrosion process for a cold-rolled steel strip, which relates to the technical field of cold-rolled steel strips and comprises the following steps: step one, washing a cold-rolled steel strip, and adding a degreasing agent in the washing process to remove oil stains on the cold-rolled steel strip; step two, carrying out acid washing on the cold-rolled steel strip in the step one to remove rust products and oxide films on the cold-rolled steel strip, and then carrying out water washing on the cold-rolled steel strip after acid washing; when the corrosion-resistant alloy material is electroplated on the cold-rolled steel strip, the electroplating is completed in two times, so that the pH value of the surface of the cold-rolled steel strip is detected after the first alloy material is electroplated, the surface of the cold-rolled steel strip is neutralized by using corresponding acid-base neutralization solution, and the neutralized cold-rolled steel strip is washed by water again, so that the subsequent alloy coating can be stably combined with the cold-rolled steel strip, and the strength and the corrosion resistance of the corrosion-resistant cold-rolled steel after being formed are greatly improved.
Description
Technical Field
The invention belongs to the technical field of cold-rolled steel strips, and particularly relates to an anti-corrosion process for a cold-rolled steel strip.
Background
The cold-rolled steel has good performance, namely, the cold-rolled strip steel and the steel plate with thinner thickness and higher precision can be obtained by cold rolling, the straightness is high, the surface smoothness is high, the surface of the cold-rolled plate is clean and bright, the coating processing is easy to carry out, the cold-rolled steel is mainly applied to the industries of automobiles, printing iron drums, buildings, building materials, bicycles and the like, and the cold-rolled steel is also the best material for producing organic coating steel plates;
the corrosion prevention process of the cold-rolled steel strip on the market still has defects in implementation, when the corrosion prevention performance of the cold-rolled steel strip is improved, the corrosion prevention coating is plated on the cold-rolled steel strip mostly through corrosion-resistant alloy materials or directly brushed on the cold-rolled steel strip, the corrosion-resistant coating is easy to fall off due to external friction, and in addition, when the corrosion-resistant alloy materials are plated on the cold-rolled steel strip, the alloy materials are difficult to be stably combined with the cold-rolled steel strip, so the corrosion prevention performance of the cold-rolled steel strip is.
Disclosure of Invention
The invention aims to provide an anti-corrosion process for a cold-rolled steel strip, which aims to solve the problems in the background technology.
The technical scheme adopted by the invention is as follows:
a corrosion prevention process for a cold-rolled steel strip comprises the following steps:
step one, washing a cold-rolled steel strip, and adding a degreasing agent in the washing process to remove oil stains on the cold-rolled steel strip;
step two, carrying out acid washing on the cold-rolled steel strip in the step one to remove rust products and oxide films on the cold-rolled steel strip, and then carrying out water washing on the cold-rolled steel strip after acid washing;
step three, putting the cold-rolled steel strip washed by the water in the step two into an electroplating bath for primary electroplating to bottom the cold-rolled steel strip;
step four, washing the cold-rolled steel strip subjected to the primary electroplating in the step four, and then carrying out secondary electroplating on the cold-rolled steel strip to realize surface electroplating of the cold-rolled steel strip;
and step five, washing the cold-rolled steel strip subjected to secondary electroplating, dehydrating and drying to obtain the cold-rolled steel strip with the corrosion resistance.
The washing mode adopts ultrasonic cleaning, and the water used for washing is the pure water after heating.
In the third step, the electroplated coating metal of the cold-rolled steel strip comprises zinc alloy, copper alloy, nickel alloy and chromium alloy.
And step two, before the cold-rolled steel is washed again, neutralizing the pH value of the surface of the cold-rolled steel by using a corresponding acid-base additive, then, when the cold-rolled steel is washed again, putting a surfactant into the water for cleaning, wherein the cleaning time is thirty seconds, and washing again.
In the second step, hydrochloric acid, sulfuric acid and nitric acid are adopted for acid washing, and the hydrochloric acid, the sulfuric acid and the nitric acid can be used independently or in a mixed mode.
And adding additives into the electroplating bath in the electroplating process, wherein the additives comprise a brightening agent, a leveling agent, a wetting agent and a plating layer refiner.
And step four, in the washing process of the cold-rolled steel strip, detecting the pH value of the surface of the cold-rolled steel strip, neutralizing the surface of the cold-rolled steel strip by using corresponding acid-base neutralizing liquid, and washing the neutralized cold-rolled steel strip again.
And step five, the water in the dehydration process is prevented from contacting with workers, and when the surface of the cold-rolled steel strip is dried, the generated gas is led out outdoors through an exhaust fan and a pipeline.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
when the corrosion-resistant alloy coating is used, firstly, oil stains and rust on the surface of the cold-rolled steel strip can be quickly removed by removing oil and pickling on the cold-rolled steel strip, and before the cold-rolled steel strip is electroplated, the strength of the corrosion-resistant alloy coating and the cold-rolled steel strip in combination can be ensured by using the surfactant;
when the corrosion-resistant alloy material is electroplated on the cold-rolled steel strip, the electroplating is completed twice, so that the pH value of the surface of the cold-rolled steel strip is detected after the cold-rolled steel strip is electroplated with the first alloy material, the surface of the cold-rolled steel strip is neutralized by using corresponding acid-base neutralizing liquid, and the neutralized cold-rolled steel strip is washed by water again, so that the subsequent alloy coating can be stably combined with the cold-rolled steel strip, and the strength and the corrosion resistance of the formed corrosion-resistant cold-rolled steel are greatly improved.
Drawings
FIG. 1 is a block flow diagram of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the corrosion prevention process of the cold-rolled steel strip comprises the following steps:
step one, washing a cold-rolled steel strip, and adding a degreasing agent in the washing process to remove oil stains on the cold-rolled steel strip;
step two, carrying out acid washing on the cold-rolled steel strip in the step one to remove rust products and oxide films on the cold-rolled steel strip, and then carrying out water washing on the cold-rolled steel strip after acid washing;
step three, putting the cold-rolled steel strip washed by the water in the step two into an electroplating bath for primary electroplating to bottom the cold-rolled steel strip;
step four, washing the cold-rolled steel strip subjected to the primary electroplating in the step four, and then carrying out secondary electroplating on the cold-rolled steel strip to realize surface electroplating of the cold-rolled steel strip;
and step five, washing the cold-rolled steel strip subjected to secondary electroplating, dehydrating and drying to obtain the cold-rolled steel strip with the corrosion resistance.
The washing mode adopts ultrasonic cleaning, and the water used for washing is the pure water after heating.
In the third step, the electroplated coating metal of the cold-rolled steel strip comprises zinc alloy, copper alloy, nickel alloy and chromium alloy.
And step two, before the cold-rolled steel is washed again, neutralizing the pH value of the surface of the cold-rolled steel by using a corresponding acid-base additive, then, when the cold-rolled steel is washed again, putting a surfactant into the water for cleaning, wherein the cleaning time is thirty seconds, and washing again.
In the second step, hydrochloric acid, sulfuric acid and nitric acid are adopted for acid washing, and the hydrochloric acid, the sulfuric acid and the nitric acid can be used independently or in a mixed mode.
Additives including brighteners, levelers, wetting agents, and plating refiners are added to the plating bath during the plating process to improve the properties of the plating.
And step four, in the washing process of the cold-rolled steel strip, detecting the pH value of the surface of the cold-rolled steel strip, neutralizing the surface of the cold-rolled steel strip by using corresponding acid-base neutralizing liquid, and washing the neutralized cold-rolled steel strip again.
And step five, the water in the dehydration process is prevented from contacting with workers, and when the surface of the cold-rolled steel strip is dried, the generated gas is led out of the room through an exhaust fan and a pipeline, so that the workers can operate healthily.
Through the technical scheme:
when the corrosion-resistant alloy coating is used, firstly, oil stains and rust on the surface of the cold-rolled steel strip can be quickly removed by removing oil and pickling on the cold-rolled steel strip, and before the cold-rolled steel strip is electroplated, the strength of the corrosion-resistant alloy coating and the cold-rolled steel strip in combination can be ensured by using the surfactant;
when the corrosion-resistant alloy material is electroplated on the cold-rolled steel strip, the electroplating is completed twice, so that the pH value of the surface of the cold-rolled steel strip is detected after the cold-rolled steel strip is electroplated with the first alloy material, the surface of the cold-rolled steel strip is neutralized by using corresponding acid-base neutralizing liquid, and the neutralized cold-rolled steel strip is washed by water again, so that the subsequent alloy coating can be stably combined with the cold-rolled steel strip, and the strength and the corrosion resistance of the formed corrosion-resistant cold-rolled steel are greatly improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. The anti-corrosion process of the cold-rolled steel strip is characterized by comprising the following steps: the method comprises the following steps:
step one, washing a cold-rolled steel strip, and adding a degreasing agent in the washing process to remove oil stains on the cold-rolled steel strip;
step two, carrying out acid washing on the cold-rolled steel strip in the step one to remove rust products and oxide films on the cold-rolled steel strip, and then carrying out water washing on the cold-rolled steel strip after acid washing;
step three, putting the cold-rolled steel strip washed by the water in the step two into an electroplating bath for primary electroplating to bottom the cold-rolled steel strip;
step four, washing the cold-rolled steel strip subjected to the primary electroplating in the step four, and then carrying out secondary electroplating on the cold-rolled steel strip to realize surface electroplating of the cold-rolled steel strip;
and step five, washing the cold-rolled steel strip subjected to secondary electroplating, dehydrating and drying to obtain the cold-rolled steel strip with the corrosion resistance.
2. The process for corrosion protection of cold rolled steel strip according to claim 1, wherein: the washing mode adopts ultrasonic cleaning, and the water used for washing is the pure water after heating.
3. The process for corrosion protection of cold rolled steel strip according to claim 1, wherein: in the third step, the electroplated coating metal of the cold-rolled steel strip comprises zinc alloy, copper alloy, nickel alloy and chromium alloy.
4. The process for corrosion protection of cold rolled steel strip according to claim 1, wherein: and step two, before the cold-rolled steel is washed again, neutralizing the pH value of the surface of the cold-rolled steel by using a corresponding acid-base additive, then, when the cold-rolled steel is washed again, putting a surfactant into the water for cleaning, wherein the cleaning time is thirty seconds, and washing again.
5. The corrosion protection process for cold-rolled steel strip according to claim 4, wherein: in the second step, hydrochloric acid, sulfuric acid and nitric acid are adopted for acid washing, and the hydrochloric acid, the sulfuric acid and the nitric acid can be used independently or in a mixed mode.
6. The process for corrosion protection of cold rolled steel strip according to claim 1, wherein: and adding additives into the electroplating bath in the electroplating process, wherein the additives comprise a brightening agent, a leveling agent, a wetting agent and a plating layer refiner.
7. The process for corrosion protection of cold rolled steel strip according to claim 1, wherein: and step four, in the washing process of the cold-rolled steel strip, detecting the pH value of the surface of the cold-rolled steel strip, neutralizing the surface of the cold-rolled steel strip by using corresponding acid-base neutralizing liquid, and washing the neutralized cold-rolled steel strip again.
8. The process for corrosion protection of cold rolled steel strip according to claim 1, wherein: and step five, the water in the dehydration process is prevented from contacting with workers, and when the surface of the cold-rolled steel strip is dried, the generated gas is led out outdoors through an exhaust fan and a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010951915.6A CN112210804A (en) | 2020-09-11 | 2020-09-11 | Cold-rolled steel strip corrosion prevention process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010951915.6A CN112210804A (en) | 2020-09-11 | 2020-09-11 | Cold-rolled steel strip corrosion prevention process |
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| CN112210804A true CN112210804A (en) | 2021-01-12 |
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| CN202010951915.6A Pending CN112210804A (en) | 2020-09-11 | 2020-09-11 | Cold-rolled steel strip corrosion prevention process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112210805A (en) * | 2020-09-17 | 2021-01-12 | 江苏华久辐条制造有限公司 | Cold-rolled strip steel anti-corrosion process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5275716A (en) * | 1992-03-23 | 1994-01-04 | Nkk Corporation | Method for manufacturing tin-electroplated cold-rolled steel strip |
| CN102021623A (en) * | 2011-01-14 | 2011-04-20 | 燕山大学 | Bright electrochromism method for cold-rolled steel strip |
| CN102776460A (en) * | 2012-03-19 | 2012-11-14 | 江苏大力神科技股份有限公司 | Production method of thin steel strip hot galvanizing |
| CN108330520A (en) * | 2017-01-17 | 2018-07-27 | 漯河江山天安新型建材有限公司 | A kind of galvanized steel plain sheet of heat resistance, corrosion resistance, high weldability |
-
2020
- 2020-09-11 CN CN202010951915.6A patent/CN112210804A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5275716A (en) * | 1992-03-23 | 1994-01-04 | Nkk Corporation | Method for manufacturing tin-electroplated cold-rolled steel strip |
| CN102021623A (en) * | 2011-01-14 | 2011-04-20 | 燕山大学 | Bright electrochromism method for cold-rolled steel strip |
| CN102776460A (en) * | 2012-03-19 | 2012-11-14 | 江苏大力神科技股份有限公司 | Production method of thin steel strip hot galvanizing |
| CN108330520A (en) * | 2017-01-17 | 2018-07-27 | 漯河江山天安新型建材有限公司 | A kind of galvanized steel plain sheet of heat resistance, corrosion resistance, high weldability |
Non-Patent Citations (1)
| Title |
|---|
| 王振华 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112210805A (en) * | 2020-09-17 | 2021-01-12 | 江苏华久辐条制造有限公司 | Cold-rolled strip steel anti-corrosion process |
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