CN107988593A - Metal surface treating method - Google Patents
Metal surface treating method Download PDFInfo
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- CN107988593A CN107988593A CN201610946862.2A CN201610946862A CN107988593A CN 107988593 A CN107988593 A CN 107988593A CN 201610946862 A CN201610946862 A CN 201610946862A CN 107988593 A CN107988593 A CN 107988593A
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- China
- Prior art keywords
- metal surface
- passivation
- treating method
- surface treating
- acid
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Classifications
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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
- C23C22/05—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
- C23C22/60—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 alkaline aqueous solutions with pH greater than 8
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- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
The metal surface treating method of the present invention, including following passivation step：Use containing mass fraction for 0.8%~1.7% hydrogen peroxide, volume fraction be 0.08%~0.13% triethanolamine, and the passivating solution of tertiary sodium phosphate that mass concentration is 1.5g/L~2.5g/L is passivated metal surface.The present invention can form fine and close passivating film in metal surface, so that the corrosion-resistant and resistance to service life got rusty, extend metal.
Description
Technical field
The present invention relates to the etch-proof Passivation Treatment after metal surface treatment process, more particularly to metal cleaning.
Background technology
Bright and clean metal surface usually needs one layer of thin protective film to resist corrosion and get rusty, and this protective film is referred to as
Passivating film.Can be traditionally that the passivating solution that metal forms passivating film generally has sodium nitrite, hydrazine, polyphosphate, hydrogen peroxide
Deng.Wherein hydrogen peroxide belongs to emerging environmentally protective passivator and is just being widely used, but in actual implementation, metal surface
Passivating film easily produces spot corrosion and secondary rust, and therefore, the corrosion resistance of passivating film is unsatisfactory.
It would therefore be highly desirable to a kind of improved metal surface treating method is to overcome the defects of above-mentioned.
The content of the invention
It is an object of the invention to provide a kind of metal surface treating method, it can form fine and close passivation in metal surface
Film, so that the corrosion-resistant and resistance to service life got rusty, extend metal.
To achieve the above object, metal surface treating method of the invention, including following passivation step：Using containing quality point
Count the hydrogen peroxide for 0.8%~1.7%, the triethanolamine that volume fraction is 0.08%~0.13%, and mass concentration is
The passivating solution of the tertiary sodium phosphate of 1.5g/L~2.5g/L is passivated metal surface.
It is preferred that the passivation step further include control the passivating solution pH value be 10~10.2, passivation temperature 40
~50 degree, when passivation time is 3~5 small.
It is preferred that further include caustic scrubbing step before the passivation step：Use containing concentration for 5%~10% NaOH or
Na2CO3Lye metal surface is cleaned.
It is preferred that water rinsing step is further included before the caustic scrubbing step：Metal surface is carried out using deionized water
Rinse.
It is preferred that further include acid pickling step after the caustic scrubbing step：Use containing concentration be 5%~10% hydrochloric acid with
And the acid solution for the hexamethylenetetramine that mass concentration is 4.5g/L~6g/L cleans metal surface.
It is preferred that the acid pickling step further includes：Use mass fraction for 5%~8% citric acid to metal surface into
Row rinsing.
Compared with prior art, passivating solution of the invention is good for the quality of passivating film using hydrogen peroxide as main passivating solution
Bad to play a decisive role, with the consumption of hydrogen peroxide, tertiary sodium phosphate compensate for hydrogen peroxide passivated as auxiliary type passivating solution
In journey because decompose and caused by the deficiency that declines of Chromating Film On Zn Deposits, while save medicine.Triethanolamine is prevented as chelating agent
Fe3+ metal surface deposition, so as to prevent spot corrosion and the generation of secondary rust.Therefore the passivation liquid energy of the present invention is in metal
Surface forms fine and close passivating film, so that the corrosion-resistant and resistance to service life got rusty, extend metal.
Embodiment
The metal surface treating method of the present invention is described further with reference to embodiment, but is not so limited this hair
It is bright.
The passivating solution used in passivation technology in the metal surface treating method of the present invention includes mass fraction for 0.8%
~1.7% hydrogen peroxide, the triethanolamine that volume fraction is 0.08%~0.13%, and mass concentration for 1.5g/L~
The tertiary sodium phosphate of 2.5g/L.
It is preferred that passivation step further include control passivating solution pH value be 10~10.2, passivation temperature be 40~50 degree, it is blunt
When the change time is 3~5 small.
Here is several preferable passivating solution proportionings and passivation procedure control.
For example, use containing mass fraction for 0.8% hydrogen peroxide, volume fraction be 0.1% triethanolamine, and quality
Concentration is that the passivating solution of the tertiary sodium phosphate of 2g/L is passivated metal surface, and control ph is 10.05, passivation temperature 40
Degree, when passivation time is 4 small
For another example, use containing mass fraction for 1% hydrogen peroxide, volume fraction be 0.12% triethanolamine, and quality
Concentration is that the passivating solution of the tertiary sodium phosphate of 2.5g/L is passivated metal surface, and control ph is 10.2, and passivation temperature is
50 degree, when passivation time is 4.5 small.
Use containing mass fraction for 1.7% hydrogen peroxide, volume fraction be 0.09% triethanolamine, and mass concentration
Passivating solution for the tertiary sodium phosphate of 2g/L is passivated metal surface, itself and control ph are 10.05, passivation temperature 42
Degree, when passivation time is 5 small.
The passivation technology of above-mentioned metal surface can be applied to the field that metal involved in industry cleans, for example, in metal
Passivation Treatment is carried out after being cleaned.Specifically, metal surface treating method of the invention comprises the following steps：
Water rinsing step：Metal surface is rinsed using deionized water.Purpose is dust of metal surface etc.
Impurity is removed.
Caustic scrubbing step：Use and metal surface is cleaned for the lye of 5%~10% NaOH or Na2CO3 containing concentration.
By the caustic scrubbing step, the various greasy dirts in metal surface, oil stain, machine oil antirust oil and can remove organic matter so that in acid in next step
Acid solution significantly more efficient can be contacted with metal when washing, and promote the dissolving of metal oxide, so as to ensure uniform pickling.
Water rinsing step：It is rinsed with deionized water, rinses to pH value and be less than or equal to 9.0.
Acid pickling step：Use containing concentration as 5%~10% hydrochloric acid and mass concentration is 4.5g/L~6g/L six times
The acid solution of tetramine cleans metal surface.Temperature is controlled at 40 degree or so, when pickling time is 6 small.After, adopt
Rinsed with the citric acid of mass fraction 5%~8%, control ph is 3.5~4.0, and temperature is 60~70 degree, rinsing time
For 2~3 it is small when.
Passivation step：Addition include the hydrogen peroxide, volume fraction that mass fraction is 0.8%~1.7% be 0.08%~
0.13% triethanolamine, and the passivating solution for the tertiary sodium phosphate that mass concentration is 1.5g/L~2.5g/L, control passivating solution
PH value is 10~10.2, and passivation temperature is 40~50 degree, when passivation time is 3~5 small, so as to form densification in metal surface
Passivation protection film.
In the Passivation Treatment step of the present invention, using hydrogen peroxide as main passivating solution, risen for the quality of passivating film
Decisive role, with the consumption of hydrogen peroxide, tertiary sodium phosphate compensate for hydrogen peroxide in passivating process as auxiliary type passivating solution
Because decompose and caused by the deficiency that declines of Chromating Film On Zn Deposits, while save medicine.Triethanolamine prevents Fe as chelating agent3+
Deposition in metal surface, so as to prevent spot corrosion and the generation of secondary rust.Moreover, under 40~50 degree of passivation temperature, shape
Into the quality of passivating film reach optimal.To sum up, passivation liquid energy of the invention forms fine and close passivating film in metal surface, so that resistance to
Corrosion and it is resistance to get rusty, extend metal, the service life of equipment.
The above disclosed right for being only presently preferred embodiments of the present invention, the present invention cannot being limited with this certainly
Scope, therefore the equivalent variations made according to scope of the present invention patent, are still within the scope of the present invention.
Claims (6)
1. a kind of metal surface treating method, it is characterised in that including following passivation step：
Use containing mass fraction for 0.8%~1.7% hydrogen peroxide, volume fraction be 0.08%~0.13% triethanolamine,
And the passivating solution for the tertiary sodium phosphate that mass concentration is 1.5g/L~2.5g/L is passivated metal surface.
2. metal surface treating method as claimed in claim 1, it is characterised in that：The passivation step is further included described in control
The pH value of passivating solution is 10~10.2, and passivation temperature is 40~50 degree, when passivation time is 3~5 small.
3. metal surface treating method as claimed in claim 1, it is characterised in that：Alkali is further included before the passivation step
Wash step：Use containing concentration for 5%~10% NaOH or Na2CO3Lye metal surface is cleaned.
4. metal surface treating method as claimed in claim 2, it is characterised in that：Water is further included before the caustic scrubbing step
Rinsing step：Metal surface is rinsed using deionized water.
5. metal surface treating method as claimed in claim 2, it is characterised in that：Acid is further included after the caustic scrubbing step
Wash step：Use the hexamethylenetetramine for being 4.5g/L~6g/L for 5%~10% hydrochloric acid and mass concentration containing concentration
Acid solution cleans metal surface.
6. metal surface treating method as claimed in claim 5, it is characterised in that：The acid pickling step further includes：Using matter
The citric acid that amount fraction is 5%~8% rinses metal surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610946862.2A CN107988593A (en) | 2016-10-26 | 2016-10-26 | Metal surface treating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610946862.2A CN107988593A (en) | 2016-10-26 | 2016-10-26 | Metal surface treating method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107988593A true CN107988593A (en) | 2018-05-04 |
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ID=62029065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610946862.2A Pending CN107988593A (en) | 2016-10-26 | 2016-10-26 | Metal surface treating method |
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| Country | Link |
|---|---|
| CN (1) | CN107988593A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110760834A (en) * | 2019-12-04 | 2020-02-07 | 嘉善永金金属制品有限公司 | Metal part surface treatment process |
| CN111321396A (en) * | 2020-04-01 | 2020-06-23 | 南宁学院 | Metal surface treatment method |
-
2016
- 2016-10-26 CN CN201610946862.2A patent/CN107988593A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110760834A (en) * | 2019-12-04 | 2020-02-07 | 嘉善永金金属制品有限公司 | Metal part surface treatment process |
| CN111321396A (en) * | 2020-04-01 | 2020-06-23 | 南宁学院 | Metal surface treatment method |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180504 |