CN1483857A - Method for plating dense chromium - Google Patents
Method for plating dense chromium Download PDFInfo
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- CN1483857A CN1483857A CNA031532349A CN03153234A CN1483857A CN 1483857 A CN1483857 A CN 1483857A CN A031532349 A CNA031532349 A CN A031532349A CN 03153234 A CN03153234 A CN 03153234A CN 1483857 A CN1483857 A CN 1483857A
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Abstract
The method for plating compact chrome on the stainless steel and low-carbon steel component is characterized by that the exterior edge outside of corner of the component to be plated is surrounded with protective wire whose diameter is 1.5-2.0 mm, and said protective with has the distance of 3-4 mm from the component to be plated, its electric current density is 55-62 A/sq.dm, bath liquor temp. is 49-54.4 deg.C, solution concentration is: CrO3:225-262 g/l, CrO3/SO4(2-):100+/-10:1 g/l, Cr(3+):2-4 g/l, and its ripple coefficient is less than 3%, and said electric power supply can be used to make electroplating treatment, so that a compact chrome-plated layer can be obtained on the stainless steel or low-carbon steel component.
Description
Technical field
The present invention relates to a kind of method of the steel part being plated close chromium.
Background technology
Normally fine and closely woven in order to obtain, wear-resisting and anti-reflective etc. the coating of chromium plating on the aircraft product, it is multiple that its processing method has, as: hard chrome plating, spongy chromium plating, milky white chromium, black chromium etc.Hard chrome plating is a processing method comparatively commonly used in making airplane parts, and its chromed processing parameter is: current density: 50～60A/dm
2, tank liquor temperature: 52～58 ℃, CrO
3: 200～250 grams per liters, H
2SO
4: 2.0～2.5 grams per liters, Cr
3+: 3～8 grams per liters, the ripple factor of power supply can be more than 5%.The coating hardness of finishing with this processing method can only reach about 750 Nu Shi, have at present by the method that adds additive and improve coating hardness, but, these additives can cause when electroplating by the suction hydrogen of plating part again, thereby make reductions greatly such as hydrogen embrittlement performance, the thickness evenness of traditional chromed chromium coating of worker's engineering is poor, and especially when machining sheet, the homogeneity of coating is difficult to guarantee especially.
Summary of the invention
The purpose of this invention is to provide a kind of coating hardness height, microstructure is good, the hydrogen embrittlement performance is good Plating dense chromium method.Technical solution of the present invention is that when doing the plating pre-treatment, the dress of part is hung preparation and is, choosing diameter is the protection silk of 1.5～2.0mm, by the corner angle outward flange of plating part with the rang ring of plating piece 3～4mm around on the protection silk, use clamp, anode and part vertically are suspended in the coating bath; The chrome-plated process parameter that adopts is current density: 55～62A/dm
2, tank liquor temperature: 49～54.4 ℃, strength of solution: CrO
3: 225～262 grams per liters, CrO
3/ SO
4 2-: 100 ± 10: 1 grams per liter, Cr
3+: 2～4 grams per liters, constantly stir electroplate liquid, be lower than 3% power supply with ripple factor and carry out electroplating processes.The present invention plates close chromium process and compares with high rigidity chromium plating on microstructure and thickness of coating very high advantage is arranged; plate close chromium process and need not to add any additives; the homogeneity of thickness of coating is greatly improved; the thickness of coating tolerance can be controlled in below 5 microns; the reliability of plating piece strengthens greatly; chromium layer hardness has reached more than 895 Nu Shi; be greatly improved than existing 750 Nu Shi; the smooth surface of part; fine and closely woven; its microstructure is observed under 200 power microscopes at least; coating does not extend through the crackle of matrix, especially to the processing of sheet material, because the place of having taked before the plating part angular edge is easily produced charge concentration is around last protection silk; therefore; make coating even, bonding force is good, and part does not have the unnecessary edge accumulation and the vestige of electric arc.
Embodiment
Embodiment one
One, the method according to common, eliminate stress → solvent cleaning → polishing → electrolytic cleaning or blast → anodic corrosion carries out early stage to processing parts and handles;
Two, twine the protection silk, choose the copper wire that diameter is 2mm, the rang ring along the outward flange of part apart from part 3～4mm around, and use clamp, vertically be suspended in the coating bath;
Three, adjust strength of solution, CrO
3: 250 grams per liters, CrO
3/ SO
4: 100 ± 10: 1 grams per liter, Cr
3+: 4 grams per liters, current density: 55A/dm
2, tank liquor temperature: 51 ℃, the ripple factor of power supply is 3%, according to different plating pieces, chooses the different chromium plating times, electroplates the back dehydrogenation, polishes as required, checks.
Embodiment two
One, carry out early stage and handle, handle early stage with embodiment one;
Two, twine the protection silk, choose the copper wire that diameter is 2mm, the rang ring along the outward flange of part apart from part 3～4mm around, and use clamp, vertically be suspended in the coating bath;
Three, adjust strength of solution, CrO
3: 225 grams per liters, CrO
3/ SO
4: 100 ± 10: 1 grams per liter, Cr
3+: 2 grams per liters, current density: 60A/dm
2, tank liquor temperature: 49 ℃, the ripple factor of power supply is 3%, according to different plating pieces, chooses the different chromium plating times, electroplates the back dehydrogenation, polishes as required, checks.
Embodiment three
One, according to the method for embodiment one processing parts is carried out early stage and handle;
Two, twine the protection silk, choose the copper wire that diameter is 2mm, the rang ring along the outward flange of part apart from part 3～4mm around, and use clamp, vertically be suspended in the coating bath;
Three, adjust strength of solution, CrO
3: 260 grams per liters, CrO
3/ SO
4: 100 ± 10: 1 grams per liter, Cr
3+: 3 grams per liters, current density: 62A/dm
2, tank liquor temperature: 53 ℃, the ripple factor of power supply is 3%, according to different plating pieces, chooses the different chromium plating times, electroplates the back dehydrogenation, polishes as required, checks.
Embodiment four
One, according to the method for embodiment one processing parts is carried out early stage and handle;
Two, twine the protection silk, choose the copper wire that diameter is 1.5mm, the rang ring along the outward flange of part apart from part 3～4mm around, and use clamp, vertically be suspended in the coating bath;
Three, adjust strength of solution, CrO
3: 262 grams per liters, CrO
3/ SO
4: 100 ± 10: 1 grams per liter, Cr
3+: 4 grams per liters, current density: 62A/dm
2, tank liquor temperature: 54.4 ℃, the ripple factor of power supply is 3%, according to different plating pieces, chooses the different chromium plating times, electroplates the back dehydrogenation, polishes as required, checks.
Claims (2)
1, a kind of through eliminate stress → solvent cleaning → polishing → electrolytic cleaning or blast → anodic corrosion processing parts is carried out handle early stage and plating after the Plating dense chromium method of dehydrogenation, it is characterized in that, when doing the plating pre-treatment, the dress of part is hung preparation, choosing diameter is the protection silk of 1.5～2.0mm, by the corner angle outward flange of plating part with the rang ring of plating piece 3～4mm around on the protection silk, use clamp, anode and part vertically are suspended in the coating bath; The chrome-plated process parameter that adopts is current density: 55～62A/dm
2, tank liquor temperature: 49～54.4 ℃, strength of solution: CrO
3: 225～262 grams per liters, CrO
3/ SO
4 2-: 100 ± 10: 1 grams per liter, Cr
3+: 2～4 grams per liters, constantly stir electroplate liquid, be lower than 3% power supply with ripple factor and carry out electroplating processes.
2. Plating dense chromium method according to claim 1 is characterized in that chromed processing parameter is: current density: 60A/dm
2, tank liquor temperature: 51 ℃, CrO
3: 225～262 grams per liters, CrO
3/ SO
4 2-: 100 ± 10: 1 grams per liter, Cr
3+: 4 grams per liters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03153234 CN1226464C (en) | 2003-08-11 | 2003-08-11 | Method for plating dense chromium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03153234 CN1226464C (en) | 2003-08-11 | 2003-08-11 | Method for plating dense chromium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1483857A true CN1483857A (en) | 2004-03-24 |
| CN1226464C CN1226464C (en) | 2005-11-09 |
Family
ID=34156652
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03153234 Expired - Fee Related CN1226464C (en) | 2003-08-11 | 2003-08-11 | Method for plating dense chromium |
Country Status (1)
| Country | Link |
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| CN (1) | CN1226464C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102677111A (en) * | 2012-04-20 | 2012-09-19 | 立兆股份有限公司 | Preparation method of workpiece with bright surface coating layer |
| CN104005059A (en) * | 2014-06-11 | 2014-08-27 | 沈阳飞机工业（集团）有限公司 | Method for electroplating chromium on TC1 titanium alloy and TC2 titanium alloy |
| CN110760901A (en) * | 2019-12-17 | 2020-02-07 | 常熟市恒丰机械制造有限公司 | Surface treatment process for marine rudder stock |
| CN111041540A (en) * | 2019-12-24 | 2020-04-21 | 托伦斯半导体设备启东有限公司 | Wear-resistant treatment process for semiconductor silicon wafer |
| CN112853410A (en) * | 2021-01-06 | 2021-05-28 | 成立航空股份有限公司 | Chromium plating method for slender pull rod |
-
2003
- 2003-08-11 CN CN 03153234 patent/CN1226464C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102677111A (en) * | 2012-04-20 | 2012-09-19 | 立兆股份有限公司 | Preparation method of workpiece with bright surface coating layer |
| CN102677111B (en) * | 2012-04-20 | 2015-03-11 | 立兆股份有限公司 | Preparation method of workpiece with bright surface coating layer |
| CN104005059A (en) * | 2014-06-11 | 2014-08-27 | 沈阳飞机工业（集团）有限公司 | Method for electroplating chromium on TC1 titanium alloy and TC2 titanium alloy |
| CN110760901A (en) * | 2019-12-17 | 2020-02-07 | 常熟市恒丰机械制造有限公司 | Surface treatment process for marine rudder stock |
| CN111041540A (en) * | 2019-12-24 | 2020-04-21 | 托伦斯半导体设备启东有限公司 | Wear-resistant treatment process for semiconductor silicon wafer |
| CN112853410A (en) * | 2021-01-06 | 2021-05-28 | 成立航空股份有限公司 | Chromium plating method for slender pull rod |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1226464C (en) | 2005-11-09 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: AVIC 1 Shenfei Civil Aircraft Co., Ltd. Assignor: Shenyang aircraft industry (Group) Co., Ltd. Contract fulfillment period: 2008.1.1 to 2017.12.31 contract change Contract record no.: 2009210000077 Denomination of invention: Method for plating dense chromium Granted publication date: 20051109 License type: Fen Xuke Record date: 2009.4.3 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: SEPARATELY LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.1.1 TO 2017.12.31; CHANGE OF CONTRACT Name of requester: YI HANGSHENFEI CIVIL PLANE CO., LTD. Effective date: 20090403 |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: AVIC 1 Shenfei Civil Aircraft Co., Ltd. Assignor: Shenyang Airplane Industry (Group) Co., Ltd. Contract fulfillment period: 2008.1.1 to 2014.10.31 contract change Contract record no.: 2009210000077 Denomination of invention: Method for plating dense chromium Granted publication date: 20051109 License type: Exclusive license Record date: 20081225 |
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| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.1.1 TO 2014.10.31; CHANGE OF CONTRACT Name of requester: YI HANGSHENFEI CIVIL PLANE CO., LTD. Effective date: 20081225 |
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| EC01 | Cancellation of recordation of patent licensing contract |
Assignee: AVIC 1 Shenfei Civil Aircraft Co., Ltd. Assignor: Shenyang aircraft industry (Group) Co., Ltd. Contract record no.: 2009210000077 Date of cancellation: 20140819 |
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| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20051109 Termination date: 20140811 |
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| EXPY | Termination of patent right or utility model |