CN108559985A - A kind of copper and copper alloy bearing retainer surface cleaning activation methods - Google Patents
A kind of copper and copper alloy bearing retainer surface cleaning activation methods Download PDFInfo
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- CN108559985A CN108559985A CN201810416125.0A CN201810416125A CN108559985A CN 108559985 A CN108559985 A CN 108559985A CN 201810416125 A CN201810416125 A CN 201810416125A CN 108559985 A CN108559985 A CN 108559985A
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- Prior art keywords
- retainer
- copper
- copper alloy
- bearing retainer
- alloy bearing
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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
- C23C22/06—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 aqueous acidic solutions with pH less than 6
- C23C22/24—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 aqueous acidic solutions with pH less than 6 containing hexavalent chromium compounds
-
- 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
- C23G1/025—Cleaning or pickling metallic material with solutions or molten salts with acid solutions acidic pickling pastes
-
- 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
- C23G1/103—Other heavy metals copper or alloys of copper
-
- 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
- C23G1/24—Cleaning or pickling metallic material with solutions or molten salts with neutral solutions
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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)
- Rolling Contact Bearings (AREA)
Abstract
A kind of copper and copper alloy bearing retainer surface cleaning activation methods, it is related to a kind of bearing retainer surface treatment method, and the present invention increases the oxide skin that can not be reused original acid wash passivation method after heat treatment and effectively remove its surface to solve the problems, such as to solve some copper and copper alloy bearing retainer in the prior art in machining operation.The present invention includes degreasing, hot water wash, flowing cool water is washed, moisture film continuously checks, corrode cleaning, flowing cool water is washed, is passivated, flowing cool water is washed, strength water rinses and visual inspection.The surface scale when present invention can effectively remove heat treatment improves product appearance quality and surface anticorrosion quality, under the premise of ensureing part not excessive corrosion appearance " point ", do not change tank liquor composition, concentration and temperature, extends etching time as far as possible and achieve the purpose that effectively remove oxide skin.Invention is suitable for the surface treatment of copper and copper alloy bearing retainer.
Description
Technical field
The present invention relates to a kind of bearing retainer surface treatment methods, and in particular to a kind of copper and copper alloy bearing are kept
Frame surface cleaning activation methods.
Background technology
Copper and copper alloy bearing retainer are easy to generate the oxidation of black, yellow on surface in process of manufacture
Skin, rust staining etc. influence the appearance and corrosion resistance of retainer, to reduce the service life of a whole set of bearing.Band in order to prevent
There are black, the oxide skin of yellow, the copper of rust staining and copper alloy retainer to enter assembly and subsequent use, it is blunt frequently with pickling
The method of change handles it, and can effectively remove oxide skin makes retainer appearance is more beautiful, and the surface shape that makes that treated
At one layer using chromium as the passivating film of main matter, secondary oxidation and corrosion will not be generated again, to which the surface for improving retainer is anti-
Detritus amount extends the service life of retainer.Some copper and copper alloy bearing retainer increase in machining operation at present
Heat treatment is added and then the oxide skin on its surface can not be effectively removed using original acid wash passivation method, retainer is not achieved
Appearance requirement, cause to do over again.
Invention content
The present invention increases to solve some copper in the prior art and copper alloy bearing retainer in machining operation
The problem of original acid wash passivation method effectively removes the oxide skin on its surface can not be reused after being heat-treated by having added, and be provided
A kind of copper and copper alloy bearing retainer surface cleaning activation methods.
The present invention adopts the technical scheme that solve above-mentioned technical problem：
It includes the following steps：
One, natrium carbonicum calcinatum, sodium metasilicate and deionized water are mixed to form degreasant solution according to certain proportioning, by degreasing
Solution is heated to certain temperature, and finally the retainer after heat treatment is put into solution and is kept for the regular hour, sloughs retainer
Grease；
Two, retainer is cleaned with the tap water for being heated to 70~80 DEG C, scavenging period is 1~2min；
Three, tap water at room temperature again cleans retainer, and scavenging period is 1~2min；
Four, in the case where complete wet condition is answered on the retainer surface, observe whether at least 30s has moisture film disconnected by visual observation
It splits, if the fracture of no moisture film illustrates that step degreasing is complete, if there is moisture film fracture illustrates incomplete one weight of return to step of degreasing
New degreasing；
Five, the nitric acid of the certain density of a certain concentration, sulfuric acid, hydrochloric acid and deionized water are mixed to form corruption according to a certain ratio
Solution is lost, the retainer is immersed in etchant solution after vibration and is put into flowing cool water vibration up and down, retainer is taken out
Whether uniform observe surface, it is uneven to re-start this step, until surface uniformly carries out postorder processing；
Six, tap water at room temperature again cleans retainer, and scavenging period is 1~2min；
Seven, the chromic anhybride of certain content, the sulfuric acid of certain density and concentration and deionized water are mixed according to a certain percentage
Passivating dip is formed, the retainer is immersed and is kept for certain time；
Eight, tap water at room temperature cleans retainer, and scavenging period is 1~2min；
Nine, retainer is rinsed with the tap water at room temperature that pressure is 0.2~0.5Mpa；
Ten, visually whether observation retainer surface meets visual examination standard, according to check criteria inspection and handles, does not conform to
Lattice are handled by calcellation.
The present invention has the advantages that compared with prior art：
One, surface scale and rust staining when etchant solution of the invention can effectively remove heat treatment.
Two, the present invention ensure part not excessive corrosion occur " point " under the premise of, do not change tank liquor composition, concentration and
Temperature extends etching time and achievees the purpose that effectively remove oxide skin as far as possible.
Three, passivating dip of the present invention makes copper and copper alloy system to copper and copper alloy bearing retainer surface passivating treatment
Bearing retainer surface generates passivating film, and passivating film is more stable based on chromium, not will produce secondary oxidation, improves copper and copper
Alloy bearing retainer anti-corrosion ability, and then extend the service life of copper and copper alloy bearing retainer, it improves outside product
Appearance quality.
Specific implementation mode
Specific implementation mode one：Present embodiment it include several steps：
One, natrium carbonicum calcinatum, sodium metasilicate and deionized water are mixed to form degreasant solution according to certain proportioning, by degreasing
Solution is heated to certain temperature, and finally the retainer after heat treatment is put into solution and is kept for the regular hour, sloughs retainer
Grease；
Two, retainer is cleaned with the tap water for being heated to 70~80 DEG C, scavenging period is 1~2min；
The degreasant solution on removal retainer surface is cleaned using hot water；
Three, tap water at room temperature again cleans retainer, and scavenging period is 1~2min；
Four, in the case where complete wet condition is answered on the retainer surface, observe whether at least 30s has moisture film disconnected by visual observation
It splits, if the fracture of no moisture film illustrates that step degreasing is complete, if there is moisture film fracture illustrates incomplete one weight of return to step of degreasing
New degreasing；
Five, the nitric acid of the certain density of a certain concentration, sulfuric acid, hydrochloric acid and deionized water are mixed to form corruption according to a certain ratio
Solution is lost, the retainer is immersed in etchant solution after vibration and is put into flowing cool water vibration up and down, retainer is taken out
Whether uniform observe surface, it is uneven to re-start this step, until surface uniformly carries out postorder processing；
Six, tap water at room temperature again cleans retainer, and scavenging period is 1~2min；
Seven, the chromic anhybride of certain content, the sulfuric acid of certain density and concentration and deionized water are mixed according to a certain percentage
Passivating dip is formed, the retainer is immersed and is kept for certain time；
Eight, tap water at room temperature cleans retainer, and scavenging period is 1~2min；
Nine, retainer is rinsed with the tap water at room temperature that pressure is 0.2~0.5Mpa；
Ten, visually whether observation retainer surface meets visual examination standard, according to check criteria inspection and handles, does not conform to
Lattice are handled by calcellation；Examination criteria provide, accessory appearance color uniformly, surfacing, there is no residual oxygen skin (black or Huang
Color) do not allow excessive corrosion (point occurs in surface), it is qualification that retainer surface, which meets examination criteria, is not inconsistent standardization by work
Useless processing.
Present embodiment step 1 all carries out under shake to nine other than step 4, in order to make copper and
Copper alloy bearing retainer is fully contacted with solution.
Present embodiment makes the light that bearing retainer surface becomes by the effect of chemical solution degreasing, corrosion and passivation,
The invention belongs to a kind of activation methods.
Specific implementation mode two：In degreasant solution described in present embodiment natrium carbonicum calcinatum account for liquid quality fraction 5~
6%, sodium metasilicate accounts for the 1~2% of liquid quality fraction, and solvent deionized water accounts for the 92%-94% of liquid quality fraction, in temperature
Degreasing is carried out at 60~75 DEG C of degree, degreasing time is 5~10min.
Natrium carbonicum calcinatum is met using the natrium carbonicum calcinatum (the pure CP/500g of chemistry or higher level) for meeting GB/T639
The waterglass (sodium metasilicate) (the pure CP/500g of chemistry or higher level) of GB/T4209.
It makes a return journey copper removal and copper alloy bearing retainer surface using to the method that degreasant solution heats in present embodiment
Grease, in order to the grease on retainer surface is removed to carry out the corrosion treatment in postorder, if retainer table
Grease is contained in face, and grease can play the corrosion process in buffer action influence postorder；
Other compositions and connection relation are same as the specific embodiment one.
Specific implementation mode three：Nitric acid described in present embodiment accounts for the 20%~25% of etchant solution total volume, and sulfuric acid accounts for
The 20%~25% of etchant solution total volume, hydrochloric acid account for the 0.2%~0.4% of etchant solution total volume, and deionized water accounts for corrosion
The 49.6%-59.8% of overall solution volume, operates at room temperature.
The nitric acid meets GB/T626 (d=1.4, content 65%~68%, top pure grade GR/2500ml), the sulfuric acid symbol
Close GB/T625 (d=1.84, content 98%, top pure grade GR/2500ml), hydrochloric acid GB/T622 (d=1.19, the content 36%
~38%, top pure grade GR/2500ml).
Present embodiment is by certain density nitric acid, certain density sulfuric acid, certain density hydrochloric acid and deionized water
Mixing is to remove copper removal and copper alloy bearing retainer Surface Oxygen to copper and copper alloy bearing retainer surface corrosion
Change skin.
Other compositions and connection relation are identical with embodiment two.
Specific implementation mode four：The total time that retainer described in present embodiment immerses in the etchant solution is no more than
9S。
It is that excessive corrosion occurs in retainer in order to prevent that present embodiment control time, which is no more than 9S, on the one hand can be removed
The oxide skin on retainer surface.
Other compositions and connection relation are the same as the specific implementation mode 3.
Specific implementation mode five：Present embodiment step 5 at most repeats three times.
Present embodiment is that excessive corrosion occurs in retainer surface in order to prevent.
Other compositions and connection relation are identical as specific implementation mode four.
Specific implementation mode six：In passivating dip described in present embodiment chromic anhybride account for passivating dip volume 15%~
18%, sulfuric acid accounts for the 0.5%~1.5% of passivating dip volume, and deionized water accounts for the 80.5%-84.5% of passivating dip volume,
It operates at room temperature, the immersion time is 15~45s.
Meet the chromic anhybride (high-class product, content >=99.8%) of GB1610 or meet HG/T3444 chromic anhydride (chemistry it is pure
CP/500g or higher level), meet the sulfuric acid (d=1.84, content 98%, top pure grade GR/2500ml) of GB/T625.
Present embodiment be by after pickling copper and copper alloy bearing retainer surface be passivated processing, in copper and copper
Alloy bearing retainer surface is formed using chromium as the passivation mask of main matter, first, secondary oxidation and corrosion are not will produce, into
And the anticorrosive quality on retainer surface is improved, extend the service life of copper and copper alloy bearing retainer；Second is that making copper and copper
Alloy bearing retainer surface-brightening is beautiful.
Other compositions and connection relation are identical as specific implementation mode five.
Specific implementation mode seven：Deionized water conductivity described in present embodiment is less than 20 μ s/cm.
Present embodiment is to prevent the surface that impurity is attached to bearing retainer from influencing to remove some impurity in water removal
Passivation, to prevent making passivation layer fall off containing impurity in retainer surface passivation layer.
Other compositions and connection relation are identical as specific implementation mode six.
Claims (7)
1. a kind of copper and copper alloy bearing retainer surface cleaning activation methods, it is characterised in that：It includes the following steps：
One, natrium carbonicum calcinatum, sodium metasilicate and deionized water are mixed to form degreasant solution according to certain proportioning, by degreasant solution
It is heated to certain temperature, finally the retainer after heat treatment is put into solution and is kept for the regular hour, sloughs the oil of retainer
Fat；
Two, retainer is cleaned with the tap water for being heated to 70~80 DEG C, scavenging period is 1~2min；
Three, tap water at room temperature again cleans retainer, and scavenging period is 1~2min；
Four, in the case where complete wet condition is answered on the retainer surface, observe whether at least 30s has moisture film fracture by visual observation, such as
Fruit does not have moisture film fracture to illustrate that step degreasing is complete, if there is moisture film fracture illustrates that the incomplete return to step of degreasing one takes off again
Fat；
Five, the nitric acid of the certain density of a certain concentration, sulfuric acid, hydrochloric acid and deionized water are mixed to form to corrosion according to a certain ratio molten
The retainer is immersed in etchant solution after vibration and is put into flowing cool water vibration up and down, retainer is taken out and is observed by liquid
Whether surface is uniform, uneven to re-start this step, until surface uniformly carries out postorder processing；
Six, tap water at room temperature again cleans retainer, and scavenging period is 1~2min；
Seven, the chromic anhybride of certain content, the sulfuric acid of certain density and concentration and deionized water are mixed to form according to a certain percentage
The retainer is immersed and is kept for certain time by passivating dip；
Eight, tap water at room temperature cleans retainer, and scavenging period is 1~2min；
Nine, retainer is rinsed with the tap water at room temperature that pressure is 0.2~0.5Mpa；
Ten, visually whether observation retainer surface meets visual examination standard, according to check criteria inspection and handles, unqualified to press
Calcellation is handled.
2. a kind of copper according to claim 1 and copper alloy bearing retainer surface cleaning activation methods, feature exist
In：Natrium carbonicum calcinatum accounts for the 5~6% of liquid quality fraction in the degreasant solution, sodium metasilicate account for liquid quality fraction 1~
2%, solvent deionized water accounts for the 92%-94% of liquid quality fraction, carries out degreasing at 60~75 DEG C of temperature, degreasing time is
5~10min.
3. a kind of copper according to claim 2 and copper alloy bearing retainer surface cleaning activation methods, feature exist
In：The nitric acid accounts for the 20%~25% of etchant solution total volume, and sulfuric acid accounts for the 20%~25% of etchant solution total volume, hydrochloric acid
The 0.2%~0.4% of etchant solution total volume is accounted for, deionized water accounts for the 49.6%-59.8% of etchant solution total volume, in room temperature
Lower operation.
4. a kind of copper according to claim 3 and copper alloy bearing retainer surface cleaning activation methods, feature exist
In：The total time that the retainer immerses in the etchant solution is no more than 9s.
5. a kind of copper according to claim 4 and copper alloy bearing retainer surface cleaning activation methods, feature exist
In：Step 5 at most repeats three times.
6. a kind of copper according to claim 1,2,3,4 or 5 and copper alloy bearing retainer surface cleaning activation methods,
It is characterized in that：Chromic anhybride accounts for the 15%~18% of passivating dip volume in the passivating dip, and sulfuric acid accounts for passivating dip volume
0.5%~1.5%, deionized water accounts for the 80.5%-84.5% of passivating dip volume, operates at room temperature, immerse the time be
15~45s.
7. a kind of copper according to claim 6 and copper alloy bearing retainer surface cleaning activation methods, feature exist
In：The deionized water conductivity is less than 20 μ s/cm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810416125.0A CN108559985A (en) | 2018-05-03 | 2018-05-03 | A kind of copper and copper alloy bearing retainer surface cleaning activation methods |
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| CN201810416125.0A CN108559985A (en) | 2018-05-03 | 2018-05-03 | A kind of copper and copper alloy bearing retainer surface cleaning activation methods |
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Cited By (4)
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| CN109830577A (en) * | 2019-01-18 | 2019-05-31 | 重庆市妙格科技有限公司 | A kind of manufacturing method of high quality light-emitting diode |
| CN110592573A (en) * | 2019-10-23 | 2019-12-20 | 中国航发贵州红林航空动力控制科技有限公司 | Chemical passivation process method for copper and copper alloy thin-wall parts |
| CN111155124A (en) * | 2020-01-06 | 2020-05-15 | 中航力源液压股份有限公司 | Copper alloy surface cleaning method |
| CN115283309B (en) * | 2022-07-06 | 2024-04-02 | 中船重工龙江广瀚燃气轮机有限公司 | Method for removing residual scale and paint layer on surface of gas turbine casing by chemical method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109830577A (en) * | 2019-01-18 | 2019-05-31 | 重庆市妙格科技有限公司 | A kind of manufacturing method of high quality light-emitting diode |
| CN109830577B (en) * | 2019-01-18 | 2021-06-15 | 深圳市广盛浩科技有限公司 | Manufacturing method of high-quality light-emitting diode |
| CN110592573A (en) * | 2019-10-23 | 2019-12-20 | 中国航发贵州红林航空动力控制科技有限公司 | Chemical passivation process method for copper and copper alloy thin-wall parts |
| CN111155124A (en) * | 2020-01-06 | 2020-05-15 | 中航力源液压股份有限公司 | Copper alloy surface cleaning method |
| CN111155124B (en) * | 2020-01-06 | 2022-04-22 | 中航力源液压股份有限公司 | Copper alloy surface cleaning method |
| CN115283309B (en) * | 2022-07-06 | 2024-04-02 | 中船重工龙江广瀚燃气轮机有限公司 | Method for removing residual scale and paint layer on surface of gas turbine casing by chemical method |
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Application publication date: 20180921 |