CN109306494A - A kind of titanium plate alkali-acid washing method - Google Patents
A kind of titanium plate alkali-acid washing method Download PDFInfo
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- CN109306494A CN109306494A CN201811424832.0A CN201811424832A CN109306494A CN 109306494 A CN109306494 A CN 109306494A CN 201811424832 A CN201811424832 A CN 201811424832A CN 109306494 A CN109306494 A CN 109306494A
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- Prior art keywords
- alkali
- titanium plate
- pickling
- temperature
- alkali cleaning
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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
- C23G1/10—Other heavy metals
- C23G1/106—Other heavy metals refractory metals
-
- 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
- C23G1/28—Cleaning or pickling metallic material with solutions or molten salts with molten salts
- C23G1/32—Heavy metals
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- 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 discloses a kind of titanium plate alkali-acid washing method including alkali cleaning, washing, pickling, alkali cleaning, the alkali fusion liquid is mixed with 2~5% sodium nitrate for 95~98% sodium hydroxides by weight percent and is formed, the aqueous solution of nitric acid is that 25~33% nitric acid and the mixing of 67~75% water form by weight percent, iron alloy surface oxide skin after alkali pickling is thoroughly washed to the greatest extent, do not occur peracid phenomenon, surface is in canescence, and surface quality is good, method is simple, easy to operate.
Description
Technical field
The invention belongs to metal material surface chemical treatment method fields, and in particular to a kind of titanium plate alkali-acid washing method.
Background technique
Titanium or titanium alloy is emerging structure and function material, has specific gravity intensity than high, thermal expansion coefficient is small, corrosion-resistant
The good, high-temperature behavior of property, many advantages, such as low-temperature flexibility and low-temperature superconducting performance are excellent, aerospace, war industry and chemical industry,
The civil fields such as petroleum, ocean, sport are used widely, and " third metal " referred to as after steel titanium, aluminium is otherwise known as
" space metal ", " marine metal ".In the prior art, the chemical treatment method of titanium alloy surface is usually used alkali cleaning and adds
H2S04, HC1, tri- acid-mixed of HN03 close solution pickling, and the peracid phenomenon of " wrinkle " easily occur in titanium alloy base or material surface after pickling.
When carrying out the pickling of titanium alloy alkali using the prior art, alkali pickling rear surface part easily residual do not wash most oxide skin,
There is surface peracid phenomenon.Using atmosphere furnace annealing, titanium alloy surface is easily oxidized in annealing process, and titanium or titanium alloy exists
250 DEG C start to inhale hydrogen, 400 DEG C of beginnings oxygen uptakes, 600 DEG C start suction nitrogen, general annealing temperature is above 600 DEG C of air-breathings, and titanium and
It is longer therefore more serious in annealing process surface oxidation that titanium alloy returns the fiery time.When alkali pickling, alkali can be sent out with the oxide on surface
Raw reaction, oxide is thicker, reaction is more violent, reacts more violent, titanium or titanium alloy base or material surface temperature is higher, in addition alkali；
Melting self-temperature is higher, and alkali fusion can acutely boil, or even explode, and therefore, alkali fusion liquid is found in alkaline cleaning procedure
When having " bubbling " phenomenon, it is necessary in time put forward titanium alloy base or material from alkali fusion liquid, at this moment material temperature is very high, in addition fast easy
Burning, therefore, from alkali fusion liquid take after meeting " burning ".For the probability for reducing titanium alloy " burning ", alkali fusion is found in alkaline cleaning procedure
Melting liquid has " bubbling " sign, must immediately take out titanium alloy from alkali fusion liquid, and there is the oxide skin that do not fall in part in this way, in pickling
When titanium alloy surface easily there is peracid phenomenon.
Summary of the invention
The present invention solves the deficiencies in the prior art, provides a kind of titanium plate alkali acid including alkali cleaning, washing, pickling, alkali cleaning
Washing method, surface quality is good, and method is simple, easy to operate.
The technical scheme adopted by the invention is that:
A kind of titanium plate alkali-acid washing method, comprising the following steps:
Step 1: alkali cleaning
Titanium plate is immersed in the alkali fusion liquid between 350~430 DEG C of temperature, Immersion time is 15~60s, the alkali fusion
Melting liquid by weight percent is that 95~98% sodium hydroxides are mixed with 2~5% sodium nitrate and formed；
Step 2: washing
Titanium plate after alkali cleaning described in step 1 is immersed in temperature in the tank water between 20~60 DEG C, is washed with water and walks
The alkali fusion liquid on rapid alkali cleaning titanium plate surface；
Step 3: pickling
Titanium plate after washing described in step 2 is immersed in temperature pickling in the aqueous solution of nitric acid between 20~50 DEG C, institute
State aqueous solution of nitric acid by weight percent be 25~33% nitric acid and 67~75% water mixing form, pickling Immersion time be 3~
8min。
Step 4: alkali cleaning
Titanium plate after pickling described in step 3 is immersed in temperature in the alkali fusion liquid between 350~430 DEG C, when submergence
Between be 15~60s, the alkali fusion liquid by weight percent be 95~98% sodium hydroxides and 2~5% sodium nitrate mixing form；
It preferably, further include that the titanium plate after alkali cleaning described in step 4 is immersed in sink of the temperature between 20~60 DEG C
In water, the alkali fusion liquid on the titanium plate surface of alkali cleaning described in step 4 is washed with water.
It is furthermore preferred that in step 1 and in step 4, added every time in the case where alkali cleaning jaundice sodium nitrate 0.1~
0.2 kilogram.
Compared to the prior art, the invention has the benefit that a kind of titanium plate including alkali cleaning, washing, pickling, alkali cleaning
Alkali-acid washing method, the alkali fusion liquid are mixed with 2~5% sodium nitrate for 95~98% sodium hydroxides by weight percent and are formed,
The aqueous solution of nitric acid is that 25~33% nitric acid and the mixing of 67~75% water form by weight percent, the ferroalloy after alkali pickling
Surface scale is thoroughly washed to the greatest extent, does not occur peracid phenomenon, and surface is in canescence, and surface quality is good, and method is simple, operation side
Just.
Specific embodiment
With regard to specific embodiment, the present invention is described in detail below.
A kind of titanium plate alkali-acid washing method, comprising the following steps:
Step 1: alkali cleaning
Titanium plate is immersed in the alkali fusion liquid between 410 DEG C of temperature, Immersion time 60s, the alkali fusion liquid is by weight
Amount percentage mixes composition with 4% sodium nitrate for 96% sodium hydroxide；
Step 2: washing
Titanium plate after alkali cleaning described in step 1 is immersed in temperature in the tank water between 50 DEG C, step 1 is washed with water
The alkali fusion liquid on alkali cleaning titanium plate surface；
Step 3: pickling
Titanium plate after washing described in step 2 is immersed in temperature pickling in the aqueous solution of nitric acid between 50 DEG C, the nitre
Aqueous acid is that 30% nitric acid and the mixing of 70% water form by weight percent, and pickling Immersion time is 5min.
Step 4: alkali cleaning
Titanium plate after pickling described in step 3 is immersed in temperature in the alkali fusion liquid between 410 DEG C, Immersion time is
60s, the alkali fusion liquid are that 96% sodium hydroxide and the mixing of 4% sodium nitrate form by weight percent；
Further include that the titanium plate after alkali cleaning described in step 4 is immersed in temperature in the tank water between 50 DEG C, is washed with water
Remove the alkali fusion liquid on the titanium plate surface of alkali cleaning described in step 4.
In step 1 and in step 4,0.2 kilogram of sodium nitrate is added every time in the case where alkali cleaning jaundice.
Using the titanium plate alkali-acid washing method including alkali cleaning, washing, pickling, alkali cleaning of the invention, the alkali fusion liquid is by weight
Amount percentage is that 95~98% sodium hydroxides mix composition with 2~5% sodium nitrate, and the aqueous solution of nitric acid is by weight percent
25~33% nitric acid and 67~75% water mixing composition, the iron alloy surface oxide skin after alkali pickling are thoroughly washed to the greatest extent, were not occurred
Sour phenomenon, surface are in canescence, and surface quality is good, and method is simple, easy to operate.
Above-described embodiment, only presently preferred embodiments of the present invention, the practical range being not intended to limit the invention, thus it is all with
The equivalent variations that content described in the claims in the present invention is done should all be included within scope of the invention as claimed.
Claims (3)
1. a kind of titanium plate alkali-acid washing method, which comprises the following steps:
Step 1: alkali cleaning
Titanium plate is immersed in the alkali fusion liquid between 350~430 DEG C of temperature, Immersion time is 15~60s, the alkali fusion liquid
It is mixed and is formed with 2~5% sodium nitrate for 95~98% sodium hydroxides by weight percent；
Step 2: washing
Titanium plate after alkali cleaning described in step 1 is immersed in temperature in the tank water between 20~60 DEG C, step 1 is washed with water
The alkali fusion liquid on alkali cleaning titanium plate surface；
Step 3: pickling
Titanium plate after washing described in step 2 is immersed in temperature pickling in the aqueous solution of nitric acid between 20~50 DEG C, the nitre
Aqueous acid is that 25~33% nitric acid and the mixing of 67~75% water form by weight percent, and pickling Immersion time is 3~8min.
Step 4: alkali cleaning
Titanium plate after pickling described in step 3 is immersed in temperature in the alkali fusion liquid between 350~430 DEG C, Immersion time is
15~60s, the alkali fusion liquid are that 95~98% sodium hydroxides and the mixing of 2~5% sodium nitrate form by weight percent.
2. a kind of titanium plate alkali-acid washing method as described in claim 1, which is characterized in that further include by alkali cleaning described in step 4
Titanium plate afterwards is immersed in temperature in the tank water between 20~60 DEG C, and the titanium plate surface of alkali cleaning described in step 4 is washed with water
Alkali fusion liquid.
3. a kind of titanium plate alkali-acid washing method as claimed in claim 2, which is characterized in that in step 1 and in step 4,
Alkali cleaning adds 0.1~0.2 kilogram of sodium nitrate in the case where turning to be yellow every time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811424832.0A CN109306494A (en) | 2018-11-27 | 2018-11-27 | A kind of titanium plate alkali-acid washing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811424832.0A CN109306494A (en) | 2018-11-27 | 2018-11-27 | A kind of titanium plate alkali-acid washing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109306494A true CN109306494A (en) | 2019-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811424832.0A Pending CN109306494A (en) | 2018-11-27 | 2018-11-27 | A kind of titanium plate alkali-acid washing method |
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| Country | Link |
|---|---|
| CN (1) | CN109306494A (en) |
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2018
- 2018-11-27 CN CN201811424832.0A patent/CN109306494A/en active Pending
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| PB01 | Publication | ||
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Application publication date: 20190205 |