CN103046085B - Nuclear power generating sets member chrome-plated process - Google Patents
Nuclear power generating sets member chrome-plated process Download PDFInfo
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- CN103046085B CN103046085B CN201210577948.4A CN201210577948A CN103046085B CN 103046085 B CN103046085 B CN 103046085B CN 201210577948 A CN201210577948 A CN 201210577948A CN 103046085 B CN103046085 B CN 103046085B
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Abstract
The invention discloses nuclear power generating sets member chrome-plated process, it 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; B, frock protection; C, acid activation processing; Described chromium plating treatment step is: the part of handling well is put into the tank preheating 3-10 minute of 50 DEG C-60 DEG C in above-mentioned steps, then electroplate liquid is heated to 50 DEG C-60 DEG C, put into plating piece, current density is 20-46A/dm2, dash current density is 50-70A/dm2, adopting staged power supply, the chromium plating time is 25-30 minute; Described plating rear surface treatment step is: rinse after clean use again >=hot water injection 10-30 second of 80 DEG C with clear water, then be after neutrality by pure water rinsing, remove frock, washing dries up. Advantage of the present invention is: good uniformity, the adhesion of the part coating that this chrome-plated process is made are strong, compactness good.
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 station is the most advanced safest nuclear power station in the world today, its part not only complex-shaped, technical requirement is high, and required thickness of coating differs. But, make that part coating uniformity is good, adhesion is strong, compactness good, have superpower wear-resisting and corrosion resistance, existing domestic electroplating technology cannot reach the required standard of new three generations's nuclear power technology, therefore, for addressing the above problem, spy provides a kind of new technical scheme to satisfy the demands.
Summary of the invention
The object 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 and in the acetone solution of 100% concentration, cleaned 10-20 minute until clean, then rinse and be neutral with clear water, then artificial scrub;
B, frock protection: according to the difference of part shape, and the requirement at coating position, select corresponding tooling device and impressed current anode equipment to install, to protect non-coating especially, and rinse clean with clear water;
C, acid activation processing: the part upper step being obtained is put in the groove of the sulfuric acid liquid that fills 5% concentration and activated after 1-2 minute, rinse and be neutral with clear water;
Described chromium plating treatment step is: the part of handling well is put into the tank preheating 3-10 minute of 50 DEG C-60 DEG C in above-mentioned steps, then electroplate liquid is heated to 50 DEG C-60 DEG C, put into plating piece, current density is 20-46A/dm2, dash current density is 50-70A/dm2, adopting staged power supply, the chromium plating time is 25-30 minute;
Described plating rear surface treatment step is: rinse after clean use again >=hot water injection 10-30 second of 80 DEG C with clear water, then be after neutrality by pure water rinsing, remove frock, washing dries up.
Change the preheating time in described chromium plating treatment step according to the thickness of part wall, and 1 centimetre of the every increase of thickness heating needs to increase by 1 minute.
The composition of described electroplate liquid is chromic acid, sulfuric acid, trivalent chromium and iron tramp, and the mass concentration ratio between described chromic acid, sulfuric acid, trivalent chromium, iron tramp is (200-300): (2.2-3.5): (1-5): (1-7.5).
The heat time of the electroplate liquid in described chromium plating treatment step is determined according to the distance of anode and cathode and thickness of coating.
Advantage of the present invention is: the good uniformity of the part coating that this chrome-plated process is made, adhesion is strong, compactness is good, there is superpower wear-resisting and corrosion resistance, can reach the coating standard of core three generation products, in frock protection process, the tooling device of selecting reaches the smooth smooth effect without sharp trace to the junction between coating and non-coating, impressed current anode equipment can make inner bore of part thickness of coating even, when Du Chrome, adopt staged power supply, can make that coating uniformity is good and adhesion is strong, proportioning in electroplate liquid between each composition, the adhesion that part is reached in the process of chromium plating is strong, fineness is good, corrosion resistance is good, the effect that coating hardness is high.
Detailed description of the invention
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 and in the acetone solution of 100% concentration, cleaned 10 minutes until clean, then rinse and be neutral with clear water, then artificial scrub;
B, frock protection: according to the difference of part shape, and the requirement at coating position, select corresponding tooling device and impressed current anode equipment to install, to protect non-coating especially, and rinse clean with clear water;
C, acid activation processing: the part upper step being obtained rinses and is neutral with clear water after putting into and activating 1 minute in the groove of the sulfuric acid liquid that fills 5% concentration;
Chromium plating treatment step is: the part of handling well is put into the tank preheating 3 minutes of 50 DEG C in above-mentioned steps, then electroplate liquid is heated to 50 DEG C, electroplate liquid is by chromic acid 200g/L, sulfuric acid 2.2g/L, trivalent chromium 1g/L and iron tramp 1g/L composition, put into plating piece, and current density is 20A/dm2, dash current density is 50A/dm2, adopting staged power supply, the chromium plating time is 25 minutes;
Plating rear surface treatment step is: rinse the hot water injection 10 seconds who uses again 80 DEG C after clean with clear water, then be after neutrality by pure water rinsing, remove frock, washing dries up.
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 and in the acetone solution of 100% concentration, cleaned 15 minutes until clean, then rinse and be neutral with clear water, then artificial scrub;
B, frock protection: according to the difference of part shape, and the requirement at coating position, select corresponding tooling device and impressed current anode equipment to install, to protect non-coating especially, and rinse clean with clear water;
C, acid activation processing: the part upper step being obtained rinses and is neutral with clear water after putting into and activating 2 minutes in the groove of the sulfuric acid liquid that fills 5% concentration;
Chromium plating treatment step is: the tank preheating 7 minutes of the part of handling well being put into 55 DEG C in above-mentioned steps, electroplate liquid is heated to 55 DEG C again, electroplate liquid is made up of chromic acid 250g/L, sulfuric acid 2.8g/L, trivalent chromium 2.5g/L and iron tramp 3.5g/L, puts into plating piece, and current density is 30A/dm2, dash current density is 60A/dm2, adopting staged power supply, the chromium plating time is 28 minutes;
Plating rear surface treatment step is: rinse the hot water injection 20 seconds who uses again 90 DEG C after clean with clear water, then be after neutrality by pure water rinsing, remove frock, washing dries up.
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 and in the acetone solution of 100% concentration, cleaned 20 minutes until clean, then rinse and be neutral with clear water, then artificial scrub;
B, frock protection: according to the difference of part shape, and the requirement at coating position, select corresponding tooling device and impressed current anode equipment to install, to protect non-coating especially, and rinse clean with clear water;
C, acid activation processing: the part upper step being obtained rinses and is neutral with clear water after putting into and activating 2 minutes in the groove of the sulfuric acid liquid that fills 5% concentration;
Chromium plating treatment step is: the tank preheating 10 minutes of the part of handling well being put into 60 DEG C in above-mentioned steps, electroplate liquid is heated to 60 DEG C again, electroplate liquid is by chromic acid 300g/L, sulfuric acid 3.5g/L, trivalent chromium 5g/L), iron tramp 7.5g/L forms, and puts into plating piece, current density is 46A/dm2, dash current density is 70A/dm2, adopting staged power supply, the chromium plating time is 30 minutes;
Plating rear surface treatment step is: rinse after clean and use the hot water injection 10-30 second of 95 DEG C again with clear water, then be after neutrality by pure water rinsing, remove frock, washing dries up.
Claims (2)
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 and in the acetone solution of 100% concentration, cleaned 10-20 minute until clean, then rinse and be neutral with clear water, then artificial scrub;
B, frock protection: according to the difference of part shape, and the requirement at coating position, select corresponding tooling device and impressed current anode equipment to install, to protect non-coating especially, and rinse clean with clear water;
C, acid activation processing: the part upper step being obtained is put in the groove of the sulfuric acid liquid that fills 5% concentration and activated after 1-2 minute, rinse and be neutral with clear water;
Described chromium plating treatment step is: the part of handling well in above-mentioned steps is put into the tank preheating 3-10 minute of 50 DEG C-60 DEG C, change preheating time according to the thickness of part wall, 1 centimetre of the every increase of thickness heating needs to increase by 1 minute, again electroplate liquid is heated to 50 DEG C-60 DEG C, put into plating piece, current density is 20-46A/dm2, dash current density is 50-70A/dm2, adopting staged power supply, the chromium plating time is 25-30 minute; Wherein, the heat time of electroplate liquid determines according to the distance of anode and cathode and thickness of coating,
Described plating rear surface treatment step is: rinse after clean use again >=hot water injection 10-30 second of 80 DEG C with clear water, then be after neutrality by pure water rinsing, remove frock, washing dries up.
2. 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 tramp, the mass concentration ratio between described chromic acid, sulfuric acid, trivalent chromium, iron tramp is (200-300): (2.2-3.5): (1-5): (1-7.5).
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| CN201210577948.4A CN103046085B (en) | 2012-12-27 | 2012-12-27 | Nuclear power generating sets member chrome-plated process |
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| CN201210577948.4A CN103046085B (en) | 2012-12-27 | 2012-12-27 | Nuclear power generating sets member chrome-plated process |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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 |
| 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 |
| 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 |
| CN114108045A (en) * | 2021-12-17 | 2022-03-01 | 南通申海工业科技有限公司 | Cross-shaped guide groove chromium plating process |
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