CN105648451A - Pickling solution for removing hot-rolled double-phase stainless steel oxide skin and pickling method of pickling solution - Google Patents
Pickling solution for removing hot-rolled double-phase stainless steel oxide skin and pickling method of pickling solution Download PDFInfo
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- CN105648451A CN105648451A CN201510986368.4A CN201510986368A CN105648451A CN 105648451 A CN105648451 A CN 105648451A CN 201510986368 A CN201510986368 A CN 201510986368A CN 105648451 A CN105648451 A CN 105648451A
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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
- 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
- C23G1/086—Iron or steel solutions containing HF
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- Mechanical Engineering (AREA)
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- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention provides a pickling solution for removing hot-rolled double-phase stainless steel oxide skin and a pickling method of the pickling solution, and the picking solution can be used for quickly removing the iron oxide skin on the surface of a hot-rolled double-phase stainless steel strip better. The picking method comprises the following steps: preparing the pickling solution by sequentially mixing hydrochloric acid, nitric acid and hydrofluoric acid to obtain a mixture, and standing the mixture for about half an hour after lightly mixing the mixture for about 1-2 minutes, wherein the pickling solution consists of the following components in parts by mass: 2-3 parts of hydrochloric acid with concentration being 36%-38%, 1 part of nitric acid with the concentration being 65%-68%, and not less than 1 part of hydrofluoric acid with the concentration being 40%; completely soaking a hot-rolled double-phase stainless steel sample into the prepared pickling solution for pickling for 20-35 minutes, observing the oxide skin removal condition of a plate surface, and taking out the plate surface when the oxide skin almost drops; and under tap water, clearing the residual iron oxide skin attached to the plate surface by use of a banister brush, then, flushing the plate surface for 1-2 minutes by use of hot water, quickly blow-drying the plate surface by use of an air blower, thereby obtaining a pickled solution with better degree of finish.
Description
Technical field
The present invention relates to a kind of pickle removing hot rolling two phase stainless steel oxide skin and acid washing method thereof, belong to stainless steel surfaces processing technology field, be particularly well-suited to duplex stainless steel 2205,2101,2507.
Background technology
Two phase stainless steel is since coming out, and owing to this rustless steel steel has the feature performance benefit of ferrite and austenitic stainless steel concurrently, has the ability that excellent mechanical property, welding performance and anticorrosion stress-resistant break, especially in chloride environment. The combination of these excellent properties so that it is be widely used in the fields such as oil, chemical industry, electric power. But owing to two phase stainless steel hot-working character is poor, there is limit to split during hot-working and be inclined to face crack.
Two phase stainless steel is in hot rolling or solid solution process, and steel strip surface can form iron scale one layer fine and close, and its compactness and stability are stronger. For studying and predicting hot rolling two phase stainless steel surface quality in advance, research hot rolled plate crimping splits, face crack Crack cause and mechanism, and observe the feature of surface defect, quantity, size and distribution, to explore and to obtain best processing and Technology for Heating Processing, premise is exactly the iron scale adopting suitable pickle to remove its surface.
Consulting at present disclosed documents and materials and patent, existing two phase stainless steel pickle comes with some shortcomings part, for instance publication number be CN103820798A only for continuous acid-washing production aspect, be not suitable for its research field; Publication number is that CN104404551A mentions and does acid washing liquid for stainless steel with nitric acid and Fluohydric acid. mixed solution, and this pickle is inconspicuous to hot rolling two phase stainless steel pickling effect, need to pickle be heated, and complicated operation, complex steps.
Summary of the invention
It is an object of the invention to overcome above shortcomings in prior art, and a kind of pickle using pickling effect to remove hot rolling two phase stainless steel oxide skin preferably and acid washing method thereof are provided.
This invention address that the problems referred to above be the technical scheme is that a kind of pickle removing hot rolling two phase stainless steel oxide skin, it is characterized in that: by volume number consists of: mass concentration is the hydrochloric acid 2��3 parts of 36%��38%, mass concentration is 1 part of the nitric acid of 65%��68%, and mass concentration is not less than the Fluohydric acid. 1 part of 40%.
The number of hydrochloric acid of the present invention is the one in 2 parts, 2.1 parts, 2.2 parts, 2.3 parts, 2.4 parts, 2.5 parts, 2.6 parts, 2.7 parts, 2.8 parts, 2.9 parts and 3 parts.
The mass concentration of hydrochloric acid of the present invention is the one in 36.2%, 36.4%, 36.6%, 36.8%, 37%, 37.2%, 37.4%, 37.6%, 37.8% and 38%.
The mass concentration of nitric acid of the present invention is the one in 65%, 65.5%, 66%, 66.5%, 67%, 67.5% and 68%.
The mass concentration of Fluohydric acid. of the present invention is the one in 40%, 42%, 44%, 46%, 48%, 50%, 52%, 54%, 56%, 58% and 60%.
A kind of acid washing method removing hot rolling two phase stainless steel oxide skin, it is characterised in that: comprise the following steps:
Hydrochloric acid, nitric acid, Fluohydric acid. are mixed successively, after being gently mixed 1��2 minute by stirring rod, stands about half an hour, be configured to the pickle described in Claims 1 to 5 any claim;
Being immersed in the pickle prepared by hot rolling two-phase stainless steel sample at normal temperatures, it is desirable to plate face is completely immersed in pickle, and pickling time is 20��35 minutes, access panel surface oxidized skin removes situation, takes out sample after it comes off substantially; After sample takes out, under tap water, the iron scale outwash attachment of plate face remained with banister brush, then use hot water injection's plate face 1��2 minute, hair-dryer quickly dries up.
Pickling time of the present invention is the one in 20 minutes, 25 minutes, 30 minutes and 35 minutes.
The present invention compared with prior art, has the following advantages and effect:
1, pickle component is easily obtained, with low cost, and preparation is simple; 2, easy to operate, pickling speed is fast; 3, without heating, room temperature can carry out; 4, pickled surface quality is good; 5, suitable in hot rolling two phase stainless steel research field.
Detailed description of the invention
The present invention is described in further detail by the examples below, and following example are explanation of the invention and the invention is not limited in following example.
Hydrochloric acid in following example, nitric acid, Fluohydric acid. purity level be analytical pure, the mass concentration of hydrochloric acid is 36%��38%, the mass concentration of nitric acid is 65%��68%, the mass concentration of Fluohydric acid. is for being not less than 40%.
One, embodiment 1:
Preparation: under room temperature, successively 6000ml hydrochloric acid, 2000ml nitric acid and 2000ml Fluohydric acid. are poured in descaling bath, stand about half an hour after being gently mixed 1��2 minute by stirring rod, be configured to pickle. Namely pickle by volume number consists of hydrochloric acid 3 parts, 1 part of nitric acid, Fluohydric acid. 1 part.
Pickling: immersed in the pickle prepared by 2205 hot rolling two-phase stainless steel samples at normal temperatures, it is desirable to plate face is completely immersed in pickle, and pickling time is 20 minutes, access panel surface oxidized skin removes situation, takes out after it comes off substantially. Under tap water, the iron scale outwash attachment of plate face remained with banister brush, then use hot water injection's plate face 1��2 minute, hair-dryer quickly dries up, and can obtain the good pickled surface of fineness.
Two, embodiment 2:
Preparation: under room temperature, successively 5400ml hydrochloric acid, 2000ml nitric acid and 2000ml Fluohydric acid. are poured in descaling bath, stand about half an hour after being gently mixed 1��2 minute by stirring rod, be configured to pickle. Namely pickle by volume number consists of hydrochloric acid 2.7 parts, 1 part of nitric acid, Fluohydric acid. 1 part.
Pickling: immersed in the pickle prepared by 2205 hot rolling two-phase stainless steel samples at normal temperatures, it is desirable to plate face is completely immersed in pickle, and pickling time is 25 minutes, access panel surface oxidized skin removes situation, takes out after it comes off substantially.Under tap water, the iron scale outwash attachment of plate face remained with banister brush, then use hot water injection's plate face 1��2 minute, hair-dryer quickly dries up, and can obtain the good pickled surface of fineness.
Three, embodiment 3:
Preparation: under room temperature, successively 5000ml hydrochloric acid, 2000ml nitric acid and 2000ml Fluohydric acid. are poured in descaling bath, stand about half an hour after being gently mixed 1��2 minute by stirring rod, be configured to pickle. Namely pickle by volume number consists of hydrochloric acid 2.5 parts, 1 part of nitric acid, Fluohydric acid. 1 part.
Pickling: immersed in the pickle prepared by 2205 hot rolling two-phase stainless steel samples at normal temperatures, it is desirable to plate face is completely immersed in pickle, and pickling time is 30 minutes, access panel surface oxidized skin removes situation, takes out after it comes off substantially. Under tap water, the iron scale outwash attachment of plate face remained with banister brush, then use hot water injection's plate face 1��2 minute, hair-dryer quickly dries up, and can obtain the good pickled surface of fineness.
Four, embodiment 4:
Preparation: under room temperature, successively 4000ml hydrochloric acid, 2000ml nitric acid and 2000ml Fluohydric acid. are poured in descaling bath, stand about half an hour after being gently mixed 1��2 minute by stirring rod, be configured to pickle. Namely pickle by volume number consists of hydrochloric acid 2 parts, 1 part of nitric acid, Fluohydric acid. 1 part.
Pickling: immersed in the pickle prepared by 2205 hot rolling two-phase stainless steel samples at normal temperatures, it is desirable to plate face is completely immersed in pickle, and pickling time is 35 minutes, access panel surface oxidized skin removes situation, takes out after it comes off substantially. Under tap water, the iron scale outwash attachment of plate face remained with banister brush, then use hot water injection's plate face 1��2 minute, hair-dryer quickly dries up, and can obtain the good pickled surface of fineness.
Five, all the other embodiments
Pickle by volume number composition can also be: hydrochloric acid is the one in 2 parts, 2.1 parts, 2.2 parts, 2.3 parts, 2.4 parts, 2.5 parts, 2.6 parts, 2.7 parts, 2.8 parts, 2.9 parts and 3 parts, and nitric acid is 1 part, and Fluohydric acid. is 1 part.
The mass concentration of hydrochloric acid is the one in 36.2%, 36.4%, 36.6%, 36.8%, 37%, 37.2%, 37.4%, 37.6%, 37.8% and 38%.
The mass concentration of nitric acid is the one in 65%, 65.5%, 66%, 66.5%, 67%, 67.5% and 68%.
The mass concentration of Fluohydric acid. is the one in 40%, 42%, 44%, 46%, 48%, 50%, 52%, 54%, 56%, 58% and 60%.
Furthermore, it is necessary to illustrate, the specific embodiment described in this specification, the shape of its parts and components, be named title etc. can be different, and the above content described in this specification is only to present configuration example explanation.
Claims (7)
1. the pickle removing hot rolling two phase stainless steel oxide skin, it is characterized in that: by volume number consists of: mass concentration is the hydrochloric acid 2��3 parts of 36%��38%, mass concentration is 1 part of the nitric acid of 65%��68%, and mass concentration is not less than the Fluohydric acid. 1 part of 40%.
2. the pickle of removal hot rolling two phase stainless steel oxide skin according to claim 1, it is characterised in that: the number of described hydrochloric acid is the one in 2 parts, 2.1 parts, 2.2 parts, 2.3 parts, 2.4 parts, 2.5 parts, 2.6 parts, 2.7 parts, 2.8 parts, 2.9 parts and 3 parts.
3. the pickle removing hot rolling two phase stainless steel oxide skin according to right 1 or 2, it is characterised in that: the mass concentration of described hydrochloric acid is the one in 36.2%, 36.4%, 36.6%, 36.8%, 37%, 37.2%, 37.4%, 37.6%, 37.8% and 38%.
4. the pickle removing hot rolling two phase stainless steel oxide skin according to right 1 or 2, it is characterised in that: the mass concentration of described nitric acid is the one in 65%, 65.5%, 66%, 66.5%, 67%, 67.5% and 68%.
5. the pickle removing hot rolling two phase stainless steel oxide skin according to right 1 or 2 or 3, it is characterised in that: the mass concentration of described Fluohydric acid. is the one in 40%, 42%, 44%, 46%, 48%, 50%, 52%, 54%, 56%, 58% and 60%.
6. the acid washing method removing hot rolling two phase stainless steel oxide skin, it is characterised in that: comprise the following steps:
Hydrochloric acid, nitric acid, Fluohydric acid. are mixed successively, after being gently mixed 1��2 minute by stirring rod, stands about half an hour, be configured to the pickle described in Claims 1 to 5 any claim;
Being immersed in the pickle prepared by hot rolling two-phase stainless steel sample at normal temperatures, it is desirable to plate face is completely immersed in pickle, and pickling time is 20��35 minutes, access panel surface oxidized skin removes situation, takes out sample after it comes off substantially; After sample takes out, under tap water, the iron scale outwash attachment of plate face remained with banister brush, then use hot water injection's plate face 1��2 minute, hair-dryer quickly dries up.
7. the acid washing method of removal hot rolling two phase stainless steel oxide skin according to claim 6, it is characterised in that: described pickling time is the one in 20 minutes, 25 minutes, 30 minutes and 35 minutes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510986368.4A CN105648451A (en) | 2015-12-25 | 2015-12-25 | Pickling solution for removing hot-rolled double-phase stainless steel oxide skin and pickling method of pickling solution |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510986368.4A CN105648451A (en) | 2015-12-25 | 2015-12-25 | Pickling solution for removing hot-rolled double-phase stainless steel oxide skin and pickling method of pickling solution |
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| CN105648451A true CN105648451A (en) | 2016-06-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109055946A (en) * | 2018-09-27 | 2018-12-21 | 山西太钢不锈钢股份有限公司 | Carbon steel and low-alloy steel cut surface oxide layer pickling solution and acid washing method |
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|---|---|---|---|---|
| CN1220321A (en) * | 1997-10-28 | 1999-06-23 | 川崎制铁株式会社 | Method for making Durimet with good surface properties |
| CN102181874A (en) * | 2011-03-31 | 2011-09-14 | 山西太钢不锈钢股份有限公司 | Acid-washing method of stainless steel wire for welding |
| CN102337547A (en) * | 2010-07-15 | 2012-02-01 | 宝山钢铁股份有限公司 | Pickling method for hot rolled double-phase stainless steel plates |
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2015
- 2015-12-25 CN CN201510986368.4A patent/CN105648451A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1220321A (en) * | 1997-10-28 | 1999-06-23 | 川崎制铁株式会社 | Method for making Durimet with good surface properties |
| CN102337547A (en) * | 2010-07-15 | 2012-02-01 | 宝山钢铁股份有限公司 | Pickling method for hot rolled double-phase stainless steel plates |
| CN102181874A (en) * | 2011-03-31 | 2011-09-14 | 山西太钢不锈钢股份有限公司 | Acid-washing method of stainless steel wire for welding |
Non-Patent Citations (1)
| Title |
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| H.R.索科尔: "《双相不锈钢》", 31 January 1979, 原子能出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109055946A (en) * | 2018-09-27 | 2018-12-21 | 山西太钢不锈钢股份有限公司 | Carbon steel and low-alloy steel cut surface oxide layer pickling solution and acid washing method |
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Application publication date: 20160608 |