CN109023330A - A kind of process of precision copper piece passivation - Google Patents
A kind of process of precision copper piece passivation Download PDFInfo
- Publication number
- CN109023330A CN109023330A CN201811017099.0A CN201811017099A CN109023330A CN 109023330 A CN109023330 A CN 109023330A CN 201811017099 A CN201811017099 A CN 201811017099A CN 109023330 A CN109023330 A CN 109023330A
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- Prior art keywords
- hot water
- copper piece
- grams per
- per liter
- temperature
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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
- C23C22/06—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
- C23C22/73—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 characterised by the process
-
- 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
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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)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention belongs to technical field of surface, are related to the process problem more particularly to a kind of process of accurate copper piece passivation of a kind of accurate copper piece pickling and accurate copper piece passivation.Weak corrosion tank liquor composition: the hydrochloric acid 10-20 grams per liter that specific gravity is 1.19 is passivated tank liquor composition: the sulfuric acid 10-20 grams per liter that specific gravity is 1.84, sodium dichromate 100-180 grams per liter, villaumite 5-10 grams per liter；Hot water washing groove: deionized water to graticule；40-50 DEG C of the construction temperature of weak etching tank, construction time 10-20 second；40-50 DEG C of the construction temperature of deactivation slot, construction time 5-8 second of deactivation slot；50-60 DEG C of the construction temperature of hot water washing groove, construction time 5-8 second of hot water washing groove.It is dried up after hot water wash, is toasted in 10-20 minutes after drying, 50-60 DEG C of baking temperature, baking time 20-30 minutes.The present invention can solve the problem of accurate copper piece reduces temperature because acidity is low in pickling, it is ensured that not change the precision of part, and pickling effect is good.
Description
Technical field
The invention belongs to technical field of surface, are related to the technique side of a kind of accurate copper piece pickling and accurate copper piece passivation
Method problem more particularly to a kind of process of accurate copper piece passivation.
Background technique
General copper piece passivation at present, can Passivation Treatment after oil removing, pickling removal oxide.In Passivation Treatment
In the process, also repeatedly passivating film can be reprocessed if Chromating Film On Zn Deposits are bad, meeting injuring part base is reprocessed in multiple pickling
There is part size overproof in body.For the precision component more demanding for size, such Passivation Treatment cannot be guaranteed to produce
The precision of product, accurate copper piece passivation not can guarantee its quality using now widely used deactivation method.
Summary of the invention
The purpose of the present invention is to propose to a kind of processes that the close copper piece that can guarantee that precision copper piece size requires is passivated.
The technical solution of the invention is as follows, tank liquor composition:
Weak corrosion tank liquor composition
The hydrochloric acid 10-20 grams per liter that specific gravity is 1.19,
It is passivated tank liquor composition
The sulfuric acid 10-20 grams per liter that specific gravity is 1.84,
Sodium dichromate 100-180 grams per liter,
Villaumite 5-10 grams per liter；
Hot water washing groove
Deionized water is to graticule；
40-50 DEG C of the construction temperature of weak etching tank, construction time 10-20 second；
40-50 DEG C of the construction temperature of deactivation slot, construction time 5-8 second of deactivation slot；
50-60 DEG C of the construction temperature of hot water washing groove, construction time 5-8 second of hot water washing groove.
It is dried up after hot water wash, is toasted in 10-20 minutes after drying, 50-60 DEG C of baking temperature, baking time
20-30 minutes.
It to be dried up immediately after hot water wash.
The present invention has the advantage that and beneficial effect, the present invention can solve accurate copper piece in pickling because acidity is low and
The problem of reducing temperature, it is ensured that do not change the precision of part, and pickling effect is good.By what is generated when special Passivation Treatment
Passivating film is thicker, and for film forming speed than very fast, film layer corrosion stability is high.
The present invention is suitble to the Passivation Treatment of accurate copper product (small part is also suitble to heavy parts and thin-walled parts), operation
Method is simple, and tank liquor is at low cost, and passivation film thickness etch resistant properties are higher than common passivating film, can promote for military project, space flight, boat oceangoing ship etc.
The Passivation Treatment of various Cu alloy material precision components, effect is good not to hurt matrix.
Specific embodiment
Precision copper piece passivation of the invention will pass through following process:
Oil removing --- hot water wash --- salt pickling --- washing --- washing --- passivation --- washing --- washing ---
Hot water wash --- drying, baking.
Slot composition:
Weak corrosion tank liquor composition
Hydrochloric acid (specific gravity 1.19) 10-20 grams per liter
40-50 DEG C of temperature
Time 10-20 second
It is passivated tank liquor composition
Hot water washing groove
Deionized water is to graticule
50-60 DEG C of temperature
Time 5-8 second
Points for attention when passivation:
(1) diligent shake Hanging Basket up and down is wanted when pickling and passivation, is guaranteed the uniform pickling of part and passivation, is avoided at piece surface
It manages inconsistent.
(2) when accurate copper piece passivation, at most it is reworkable three times, then reprocess and have change in size.
(3) it must be toasted, 50-60 DEG C of temperature, be toasted 20-30 minutes in 10-20 minutes after drying up.
(4) to guarantee 50-60 DEG C of tank liquor temperature when pickling and passivation, be dried up at once after being passivated hot water.
Embodiment
Example 1: copper piece conductive plate processes post-passivation, difference 0.001mm under difference 0.0015mm in the precision at assembly
To pass through following process:
Oil removing --- hot water wash --- salt pickling --- washing --- washing --- passivation --- washing --- washing ---
Hot water wash --- drying, baking.
1, it oil removing, hot water wash: is carried out by technique requirement
2, it salt pickling: is carried out by following requirements
10 grams per liter of hydrochloric acid (specific gravity 1.19)
40 DEG C of temperature
Time 10 seconds
3, it washes: being carried out by technique requirement twice
4, it is passivated: being carried out by following requirements,
5, it is passivated: being carried out by following requirements,
Deionized water is to graticule
56 DEG C of temperature
Time 8 seconds
It is dried up after hot water wash, is toasted in 10 minutes after drying, 50 DEG C of baking temperature, baking time 20 minutes.
6, it examines: being examined after cooling by technique requirement.
Example 2: copper piece conductive shell processes post-passivation, difference 0.0018mm under difference 0.0022mm in the precision at assembly
To pass through following process:
Oil removing --- hot water wash --- salt pickling --- washing --- washing --- passivation --- washing --- washing ---
Hot water wash --- drying, baking.
1, it oil removing, hot water wash: is carried out by technique requirement
2, it salt pickling: is carried out by following requirements
15 grams per liter of hydrochloric acid (specific gravity 1.19)
Temperature 45 C
Time 20 seconds
3, it washes: being carried out by technique requirement twice
4, it is passivated: being carried out by following requirements,
5, it is passivated: being carried out by following requirements,
Deionized water is to graticule
Temperature 60 C
Time 8 seconds
It is dried up after hot water wash, is toasted in 10 minutes after drying, 50 DEG C of baking temperature, baking time 20 minutes.
6, it examines: being examined after cooling by technique requirement.
Claims (3)
1. a kind of process of precision copper piece passivation, characterized in that tank liquor composition:
Weak corrosion tank liquor composition
The hydrochloric acid 10-20 grams per liter that specific gravity is 1.19,
It is passivated tank liquor composition
The sulfuric acid 10-20 grams per liter that specific gravity is 1.84,
Sodium dichromate 100-180 grams per liter,
Villaumite 5-10 grams per liter；
Hot water washing groove
Deionized water is to graticule；
40-50 DEG C of the construction temperature of weak etching tank, construction time 10-20 second；
40-50 DEG C of the construction temperature of deactivation slot, construction time 5-8 second of deactivation slot；
50-60 DEG C of the construction temperature of hot water washing groove, construction time 5-8 second of hot water washing groove.
2. a kind of process of accurate copper piece passivation according to claim 1, characterized in that blown after hot water wash
It is dry, it is toasted in 10-20 minutes after drying, 50-60 DEG C of baking temperature, baking time 20-30 minutes.
3. a kind of process of accurate copper piece passivation according to claim 1, characterized in that be blown immediately after hot water wash
It is dry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811017099.0A CN109023330A (en) | 2018-08-31 | 2018-08-31 | A kind of process of precision copper piece passivation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811017099.0A CN109023330A (en) | 2018-08-31 | 2018-08-31 | A kind of process of precision copper piece passivation |
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| Publication Number | Publication Date |
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| CN109023330A true CN109023330A (en) | 2018-12-18 |
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| CN201811017099.0A Pending CN109023330A (en) | 2018-08-31 | 2018-08-31 | A kind of process of precision copper piece passivation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203403156U (en) * | 2013-06-24 | 2014-01-22 | 浙江万力铜业有限公司 | Tin bronze belt aftertreatment device |
| CN105441918A (en) * | 2015-10-26 | 2016-03-30 | 安徽长安专用汽车制造有限公司 | Automobile copper alloy passivation process |
| CN108179308A (en) * | 2018-02-07 | 2018-06-19 | 合肥安力电力工程有限公司 | A kind of toughness brass alloys electrical fitting of high-strength corrosion-resisting |
-
2018
- 2018-08-31 CN CN201811017099.0A patent/CN109023330A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203403156U (en) * | 2013-06-24 | 2014-01-22 | 浙江万力铜业有限公司 | Tin bronze belt aftertreatment device |
| CN105441918A (en) * | 2015-10-26 | 2016-03-30 | 安徽长安专用汽车制造有限公司 | Automobile copper alloy passivation process |
| CN108179308A (en) * | 2018-02-07 | 2018-06-19 | 合肥安力电力工程有限公司 | A kind of toughness brass alloys electrical fitting of high-strength corrosion-resisting |
Non-Patent Citations (1)
| Title |
|---|
| 姜银方等: "《现代表面工程技术》", 30 November 2005, 化学工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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Application publication date: 20181218 |