CN103046085A - Chromium plating process of nuclear generator unit members - Google Patents
Chromium plating process of nuclear generator unit members Download PDFInfo
- Publication number
- CN103046085A CN103046085A CN2012105779484A CN201210577948A CN103046085A CN 103046085 A CN103046085 A CN 103046085A CN 2012105779484 A CN2012105779484 A CN 2012105779484A CN 201210577948 A CN201210577948 A CN 201210577948A CN 103046085 A CN103046085 A CN 103046085A
- Authority
- CN
- China
- Prior art keywords
- treatment
- plating
- chromium
- chromium plating
- flushing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000007747 plating Methods 0.000 title claims abstract description 57
- VYZAMTAEIAYCRO-UHFFFAOYSA-N chromium Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 229910052804 chromium Inorganic materials 0.000 title claims abstract description 32
- 239000011651 chromium Substances 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 238000004381 surface treatment Methods 0.000 claims abstract description 24
- 230000001264 neutralization Effects 0.000 claims abstract description 11
- 238000005406 washing Methods 0.000 claims abstract description 8
- 239000002253 acid Substances 0.000 claims abstract description 6
- 230000004913 activation Effects 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 claims abstract description 3
- 238000004140 cleaning Methods 0.000 claims description 40
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound 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OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 24
- 239000011248 coating agent Substances 0.000 claims description 21
- 238000000576 coating method Methods 0.000 claims description 21
- 238000011010 flushing procedure Methods 0.000 claims description 20
- 239000007788 liquid Substances 0.000 claims description 18
- KRVSOGSZCMJSLX-UHFFFAOYSA-L Chromic acid Chemical compound 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O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 claims description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,PD94bWwgdmVyc2lvbj0nMS4wJyBlbmNvZGluZz0naXNvLTg4NTktMSc/Pgo8c3ZnIHZlcnNpb249JzEuMScgYmFzZVByb2ZpbGU9J2Z1bGwnCiAgICAgICAgICAgICAgeG1sbnM9J2h0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnJwogICAgICAgICAgICAgICAgICAgICAgeG1sbnM6cmRraXQ9J2h0dHA6Ly93d3cucmRraXQub3JnL3htbCcKICAgICAgICAgICAgICAgICAgICAgIHhtbG5zOnhsaW5rPSdodHRwOi8vd3d3LnczLm9yZy8xOTk5L3hsaW5rJwogICAgICAgICAgICAgICAgICB4bWw6c3BhY2U9J3ByZXNlcnZlJwp3aWR0aD0nODVweCcgaGVpZ2h0PSc4NXB4JyB2aWV3Qm94PScwIDAgODUgODUnPgo8IS0tIEVORCBPRiBIRUFERVIgLS0+CjxyZWN0IHN0eWxlPSdvcGFjaXR5OjEuMDtmaWxsOiNGRkZGRkY7c3Ryb2tlOm5vbmUnIHdpZHRoPSc4NS4wJyBoZWlnaHQ9Jzg1LjAnIHg9JzAuMCcgeT0nMC4wJz4gPC9yZWN0Pgo8dGV4dCB4PSczNS4wJyB5PSc1My42JyBjbGFzcz0nYXRvbS0wJyBzdHlsZT0nZm9udC1zaXplOjIzcHg7Zm9udC1zdHlsZTpub3JtYWw7Zm9udC13ZWlnaHQ6bm9ybWFsO2ZpbGwtb3BhY2l0eToxO3N0cm9rZTpub25lO2ZvbnQtZmFtaWx5OnNhbnMtc2VyaWY7dGV4dC1hbmNob3I6c3RhcnQ7ZmlsbDojM0I0MTQzJyA+RjwvdGV4dD4KPHRleHQgeD0nNTEuMCcgeT0nNTMuNicgY2xhc3M9J2F0b20tMCcgc3R5bGU9J2ZvbnQtc2l6ZToyM3B4O2ZvbnQtc3R5bGU6bm9ybWFsO2ZvbnQtd2VpZ2h0Om5vcm1hbDtmaWxsLW9wYWNpdHk6MTtzdHJva2U6bm9uZTtmb250LWZhbWlseTpzYW5zLXNlcmlmO3RleHQtYW5jaG9yOnN0YXJ0O2ZpbGw6IzNCNDE0MycgPmU8L3RleHQ+Cjwvc3ZnPgo= [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- CSCPPACGZOOCGX-UHFFFAOYSA-N acetone Chemical compound 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CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 10
- 238000011109 contamination Methods 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 239000000243 solution Substances 0.000 claims description 6
- 230000000576 supplementary Effects 0.000 claims description 6
- 238000001994 activation Methods 0.000 claims description 5
- 230000000875 corresponding Effects 0.000 claims description 5
- 239000012467 final product Substances 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 3
- 238000000861 blow drying Methods 0.000 abstract 1
- 230000003628 erosive Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
Abstract
The invention discloses a chromium plating process of nuclear generator unit members, which is characterized by comprising a step of surface treatment before plating, a step of chromium plating treatment and a step of surface treatment after plating. The step of surface treatment before plating comprises the following steps: (a) oil removal treatment, (b) tool protection and (c) acid activation treatment. The step of chromium plating treatment comprises the following steps: putting the treated parts in a water bath of 50 DEG C to 60 DEG C for preheating for 3-10 min, heating a plating solution up to 50-60 DEG C, putting in plating parts, and chromium-plating for 25-30 min with multi-stage power supply under the conditions that the current density is 20-46 A/dm2 and the impact current density is 50-70 A/dm2. The step of surface treatment after plating comprises the following steps: washing with clear water and then rinsing with hot water (more than or equal to 80 DEG C) for 10-30 seconds, washing with pure water until neutral, dismounting the tools, washing with water and blow-drying. The process has the advantages that: the part coatings made by the chromium plating process are good in uniformity, bonding power and compactness.
Description
Technical field
The present invention relates to a kind of nuclear power generating sets member chrome-plated process.
Background technology
New three generations AP1000 Nuclear power plants is the most advanced safest Nuclear power plants in the world today, its part not only complex-shaped, technical requirements is high, and required thickness of coating differs.But, make that the part coating uniformity is good, bonding force is strong, compactness good, superpower wear-resisting and erosion resistance is arranged, existing domestic electroplating technology can't reach the required standard of new three generations's nuclear power technology, therefore, for addressing the above problem, the spy provides a kind of new technical scheme to satisfy the demands.
Summary of the invention
The purpose of this invention is to provide a kind of nuclear power generating sets member chrome-plated process.
The technical solution used in the present invention is:
Nuclear power generating sets member chrome-plated process comprises following treatment step: plating front surface treatment step, chromium plating treatment step and plating rear surface treatment step,
Described plating front surface treatment step is:
A, oil removal treatment: part is put into cleaned 10-20 minute in the acetone solution of 100% concentration until clean, be neutral with flushing with clean water again, then artificial scrub;
B, frock protection: according to the difference of part shape, and the requirement at coating position, select corresponding tooling device and supplementary anode equipment to install, to protect non-coating especially, and clean with flushing with clean water;
C, acid activation process: the part that upper step is obtained puts into that activation was neutral with flushing with clean water after 1-2 minute in the groove of the sulfuric acid liquid that fills 5% concentration;
Described chromium plating treatment step is: the part that will handle well in above-mentioned steps is put into 50 ℃-60 ℃ tank preheating 3-10 minute, electroplate liquid is heated to 50 ℃-60 ℃ again, puts into plating piece, and current density is 20-46A/dm
2, rush current density is 50-70 A/dm
2, adopt the staged power supply, the chromium plating time is 25-30 minute;
Described plating rear surface treatment step is: use again with after the flushing with clean water cleaning 〉=hot water injection 10-30 second of 80 ℃, be neutrality with pure water rinsing again after, remove frock, washing dries up and gets final product.
Warm up time in the described chromium plating treatment step, the thickness according to the part wall changed, and 1 centimetre of the every increase of thickness then heating needs to increase by 1 minute.
The composition of described electroplate liquid is chromic acid, sulfuric acid, trivalent chromium and iron contamination, and the mass concentration ratio between described chromic acid, sulfuric acid, trivalent chromium, the iron contamination is (200-300): (2.2-3.5): (1-5): (1-7.5).
Determine according to distance and the thickness of coating of anode and cathode the heat-up time of the electroplate liquid in the described chromium plating treatment step.
Advantage of the present invention is: the good uniformity of the part coating that this chrome-plated process is made; bonding force is strong; compactness is good; superpower wear-resisting and erosion resistance is arranged; can reach the coating standard of nuclear three generation products; in frock protection process; the tooling device of selecting reaches smooth smooth effect without sharp trace to the junction between coating and the non-coating; when making the even Zai of inner bore of part thickness of coating Du Chrome, adopts supplementary anode equipment the staged power supply; can make coating uniformity good and bonding force is strong; proportioning in the electroplate liquid between each composition is so that the bonding force that part reaches in the process of chromium plating is strong; smooth finish is good; erosion resistance is good; the effect that coating hardness is high.
Embodiment
Embodiment 1
Nuclear power generating sets member chrome-plated process of the present invention comprises following treatment step: plating front surface treatment step, chromium plating treatment step and plating rear surface treatment step,
Plating front surface treatment step is:
A, oil removal treatment: part is put into cleaned 10 minutes in the acetone solution of 100% concentration until clean, be neutral with flushing with clean water again, then artificial scrub;
B, frock protection: according to the difference of part shape, and the requirement at coating position, select corresponding tooling device and supplementary anode equipment to install, to protect non-coating especially, and clean with flushing with clean water;
C, acid activation process: the part that upper step is obtained puts into that activation was neutral with flushing with clean water after 1 minute in the groove of the sulfuric acid liquid that fills 5% concentration;
The chromium plating treatment step is: the part that will handle well in above-mentioned steps is put into 50 ℃ tank preheating 3 minutes, electroplate liquid is heated to 50 ℃ again, and electroplate liquid is by chromic acid 200g/L, sulfuric acid 2.2g/L, trivalent chromium 1g/L and iron contamination 1g/L form, and put into plating piece, and current density is 20A/dm
2, rush current density is 50A/dm
2, adopt the staged power supply, the chromium plating time is 25 minutes;
Plating rear surface treatment step is: with the hot water injection 10 seconds who uses again 80 ℃ after the flushing with clean water cleaning, be neutrality with pure water rinsing again after, remove frock, washing dries up and gets final product.
Embodiment 2
Nuclear power generating sets member chrome-plated process of the present invention comprises following treatment step: plating front surface treatment step, chromium plating treatment step and plating rear surface treatment step,
Plating front surface treatment step is:
A, oil removal treatment: part is put into cleaned 15 minutes in the acetone solution of 100% concentration until clean, be neutral with flushing with clean water again, then artificial scrub;
B, frock protection: according to the difference of part shape, and the requirement at coating position, select corresponding tooling device and supplementary anode equipment to install, to protect non-coating especially, and clean with flushing with clean water;
C, acid activation process: the part that upper step is obtained puts into that activation was neutral with flushing with clean water after 2 minutes in the groove of the sulfuric acid liquid that fills 5% concentration;
The chromium plating treatment step is: the part that will handle well in above-mentioned steps is put into 55 ℃ tank preheating 7 minutes, electroplate liquid is heated to 55 ℃ again, electroplate liquid is comprised of chromic acid 250g/L, sulfuric acid 2.8g/L, trivalent chromium 2.5g/L and iron contamination 3.5g/L, puts into plating piece, and current density is 30A/dm
2, rush current density is 60A/dm
2, adopt the staged power supply, the chromium plating time is 28 minutes;
Plating rear surface treatment step is: with the hot water injection 20 seconds who uses again 90 ℃ after the flushing with clean water cleaning, be neutrality with pure water rinsing again after, remove frock, washing dries up and gets final product.
Embodiment 3
Nuclear power generating sets member chrome-plated process of the present invention comprises following treatment step: plating front surface treatment step, chromium plating treatment step and plating rear surface treatment step,
Plating front surface treatment step is:
A, oil removal treatment: part is put into cleaned 20 minutes in the acetone solution of 100% concentration until clean, be neutral with flushing with clean water again, then artificial scrub;
B, frock protection: according to the difference of part shape, and the requirement at coating position, select corresponding tooling device and supplementary anode equipment to install, to protect non-coating especially, and clean with flushing with clean water;
C, acid activation process: the part that upper step is obtained puts into that activation was neutral with flushing with clean water after 2 minutes in the groove of the sulfuric acid liquid that fills 5% concentration;
The chromium plating treatment step is: the part that will handle well in above-mentioned steps is put into 60 ℃ tank preheating 10 minutes, electroplate liquid is heated to 60 ℃ again, electroplate liquid is by chromic acid 300g/L, sulfuric acid 3.5g/L, trivalent chromium 5g/L), iron contamination 7.5g/L forms, and puts into plating piece, current density is 46A/dm
2, rush current density is 70 A/dm
2, adopt the staged power supply, the chromium plating time is 30 minutes;
Plating rear surface treatment step is: with using again 95 ℃ hot water injection 10-30 second after the flushing with clean water cleaning, be neutrality with pure water rinsing again after, remove frock, washing dries up and gets final product.
Claims (4)
1. nuclear power generating sets member chrome-plated process is characterized in that: comprise following treatment step: plating front surface treatment step, chromium plating treatment step and plating rear surface treatment step,
Described plating front surface treatment step is:
A, oil removal treatment: part is put into cleaned 10-20 minute in the acetone solution of 100% concentration until clean, be neutral with flushing with clean water again, then artificial scrub;
B, frock protection: according to the difference of part shape, and the requirement at coating position, select corresponding tooling device and supplementary anode equipment to install, to protect non-coating especially, and clean with flushing with clean water;
C, acid activation process: the part that upper step is obtained puts into that activation was neutral with flushing with clean water after 1-2 minute in the groove of the sulfuric acid liquid that fills 5% concentration;
Described chromium plating treatment step is: the part that will handle well in above-mentioned steps is put into 50 ℃-60 ℃ tank preheating 3-10 minute, electroplate liquid is heated to 50 ℃-60 ℃ again, puts into plating piece, and current density is 20-46A/dm
2, rush current density is 50-70 A/dm
2, adopt the staged power supply, the chromium plating time is 25-30 minute;
Described plating rear surface treatment step is: use again with after the flushing with clean water cleaning 〉=hot water injection 10-30 second of 80 ℃, be neutrality with pure water rinsing again after, remove frock, washing dries up and gets final product.
2. nuclear power generating sets member chrome-plated process according to claim 1, it is characterized in that: the warm up time in the described chromium plating treatment step, the thickness according to the part wall changed, and 1 centimetre of the every increase of thickness then heating needs to increase by 1 minute.
3. nuclear power generating sets member chrome-plated process according to claim 1, it is characterized in that: the composition of described electroplate liquid is chromic acid, sulfuric acid, trivalent chromium and iron contamination, and the mass concentration ratio between described chromic acid, sulfuric acid, trivalent chromium, the iron contamination is (200-300): (2.2-3.5): (1-5): (1-7.5).
4. nuclear power generating sets member chrome-plated process according to claim 1 is characterized in that: determine according to distance and the thickness of coating of anode and cathode the heat-up time of the electroplate liquid in the described chromium plating treatment step.
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| CN103334149A (en) * | 2013-06-13 | 2013-10-02 | 中国科学院过程工程研究所 | Periodic intermittent-type hard chrome barrel-plating device and use method thereof |
| CN104746110A (en) * | 2013-12-27 | 2015-07-01 | 沈阳鼓风机集团核电泵业有限公司 | Stainless steel fastener screw thread surface chrome plating technology used for nuclear main pump |
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| CN110724980A (en) * | 2019-11-12 | 2020-01-24 | 贵州航天精工制造有限公司 | Local chromium plating method for stainless steel bolt |
| CN111304702A (en) * | 2020-04-21 | 2020-06-19 | 重庆中会表面处理有限公司 | Process for chrome plating of parts |
| CN111850634A (en) * | 2020-07-29 | 2020-10-30 | 成立航空股份有限公司 | Local chromium plating method for complex molded line part |
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| CN103334149A (en) * | 2013-06-13 | 2013-10-02 | 中国科学院过程工程研究所 | Periodic intermittent-type hard chrome barrel-plating device and use method thereof |
| CN103334149B (en) * | 2013-06-13 | 2016-04-27 | 中国科学院过程工程研究所 | A kind of cycle intermittent type rolls hard chromium plating device and using method |
| CN104746110A (en) * | 2013-12-27 | 2015-07-01 | 沈阳鼓风机集团核电泵业有限公司 | Stainless steel fastener screw thread surface chrome plating technology used for nuclear main pump |
| CN104746110B (en) * | 2013-12-27 | 2018-02-06 | 沈阳鼓风机集团核电泵业有限公司 | A kind of stainless steel support thread surface chrome-plated process applied to core main pump |
| CN108118376A (en) * | 2017-11-15 | 2018-06-05 | 重庆铁马工业集团有限公司 | A kind of method of deep hole inner surface hard chrome plating |
| CN110724980A (en) * | 2019-11-12 | 2020-01-24 | 贵州航天精工制造有限公司 | Local chromium plating method for stainless steel bolt |
| CN110724980B (en) * | 2019-11-12 | 2021-01-26 | 贵州航天精工制造有限公司 | Local chromium plating method for stainless steel bolt |
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| CN111850634A (en) * | 2020-07-29 | 2020-10-30 | 成立航空股份有限公司 | Local chromium plating method for complex molded line part |
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