CN103046085A - Chromium plating process of nuclear generator unit members - Google Patents

Chromium plating process of nuclear generator unit members Download PDF

Info

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
Application number
CN2012105779484A
Other languages
Chinese (zh)
Other versions
CN103046085B (en
Inventor
仇士学
张建峰
东永华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nantong Shen Hai Industrial Technology Co., Ltd.
Original Assignee
Nantong Shenhai Science And Industrial Technology Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nantong Shenhai Science And Industrial Technology Co ltd filed Critical Nantong Shenhai Science And Industrial Technology Co ltd
Priority to CN201210577948.4A priority Critical patent/CN103046085B/en
Publication of CN103046085A publication Critical patent/CN103046085A/en
Application granted granted Critical
Publication of CN103046085B publication Critical patent/CN103046085B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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

Nuclear power generating sets member chrome-plated process
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.
CN201210577948.4A 2012-12-27 2012-12-27 Nuclear power generating sets member chrome-plated process Active CN103046085B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210577948.4A CN103046085B (en) 2012-12-27 2012-12-27 Nuclear power generating sets member chrome-plated process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210577948.4A CN103046085B (en) 2012-12-27 2012-12-27 Nuclear power generating sets member chrome-plated process

Publications (2)

Publication Number Publication Date
CN103046085A true CN103046085A (en) 2013-04-17
CN103046085B CN103046085B (en) 2016-05-18

Family

ID=48058941

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201210577948.4A Active CN103046085B (en) 2012-12-27 2012-12-27 Nuclear power generating sets member chrome-plated process

Country Status (1)

Country Link
CN (1) CN103046085B (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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
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

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55134189A (en) * 1979-04-06 1980-10-18 Kayaba Ind Co Ltd Surface processing method
US4416738A (en) * 1980-01-28 1983-11-22 The Boeing Company Chromium plating
CN101418458A (en) * 2008-11-12 2009-04-29 娄底市中兴液压件有限公司 Double layer chromium electroplating processing process for conveying cylinder
CN101575719A (en) * 2008-05-06 2009-11-11 南通市申海特种镀饰有限责任公司 Process for performing chromium plating with superconducting material
CN101862940A (en) * 2010-05-17 2010-10-20 隆昌山川精密焊管有限责任公司 Manufacturing process of corrosion-resistant piston rod of shock absorber for vehicle

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU382758A1 (en) * 1971-03-22 1973-05-25 METHOD OF ELECTROLYTIC CHROMINATION

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55134189A (en) * 1979-04-06 1980-10-18 Kayaba Ind Co Ltd Surface processing method
US4416738A (en) * 1980-01-28 1983-11-22 The Boeing Company Chromium plating
CN101575719A (en) * 2008-05-06 2009-11-11 南通市申海特种镀饰有限责任公司 Process for performing chromium plating with superconducting material
CN101418458A (en) * 2008-11-12 2009-04-29 娄底市中兴液压件有限公司 Double layer chromium electroplating processing process for conveying cylinder
CN101862940A (en) * 2010-05-17 2010-10-20 隆昌山川精密焊管有限责任公司 Manufacturing process of corrosion-resistant piston rod of shock absorber for vehicle

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
张允诚 等: "《电镀手册》", 31 January 2007, article "第二章除油、第三章浸蚀", pages: 93 - 108 *
杨占伟 等: "工件内腔镀硬铬", 《电镀与涂饰》, vol. 25, no. 4, 30 April 2006 (2006-04-30) *
杨学安: "浅谈黄铜零件镀硬铬", 《电镀与环保》, vol. 11, no. 5, 30 September 1991 (1991-09-30), pages 36 - 37 *
王文忠: "常见金属材料镀硬铬", 《电镀与环保》, vol. 26, no. 4, 31 July 2006 (2006-07-31), pages 37 - 38 *
詹益腾: "如何提高硬铬镀层的结合力", 《电镀与涂饰》, 1 April 1988 (1988-04-01), pages 4 - 11 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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

Also Published As

Publication number Publication date
CN103046085B (en) 2016-05-18

Similar Documents

Publication Publication Date Title
CN103046085A (en) Chromium plating process of nuclear generator unit members
CN102605400B (en) Steel strip continuous copper plating process
CN102605398B (en) Method for treating surface of faucet
CN104988532A (en) Manufacturing method for stainless steel electrolysis electrode with titanium dioxide coating
CN106757230A (en) A kind of handware electro-plating method
CN101705508A (en) Plating liquid for plating micro-crack nickel and use thereof
CN106086971A (en) A kind of TC4 titanium alloy thread surface copper coating
CN103510130A (en) Trivalent hard chromium electroplating method
CN107119292A (en) A kind of nickel plating solution and the method for nickel plating
CN102839404A (en) Method for electroplating hard chrome on outer circle of molybdenum material-type workpiece
CN103014797A (en) Surface treatment process of metal sheets
CN104404578B (en) A kind of method that workpiece is carried out electrodeposited chromium processing
CN109537010B (en) Process for cyanide-free gold plating after nickel plating and bottoming of electronic component parts
CN103084796B (en) Shaping and the process of surface treatment of a kind of steel grating
CN103966645A (en) Stepping electrophoresis line production technology
CN105525313A (en) Environment-friendly electroplating formula with cobalt-based ternary alloy replacing hard chromium plating and preparation method thereof
CN110670098B (en) Method for improving quality of silicon-aluminum alloy electroplated nickel
CN105088292A (en) Surface electroplating method of metal material
CN107488867A (en) The surface treatments and surface treatment method of stainless steel substrate
CN109267115A (en) A kind of copper components nickel plating process
CN104278305A (en) Electroplated member coating layer treatment process
CN109295485A (en) A kind of electroplating technology of high-strength bolt
CN108179445A (en) A kind of no acid electrolyte and its application process
CN104451792A (en) Imitation gold electroplating method
CN203270074U (en) Electroplating device

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
GR01 Patent grant
C14 Grant of patent or utility model
CP03 Change of name, title or address

Address after: 226100, No. 29, Daqing Road, three factory, Haimen, Jiangsu, Nantong

Patentee after: Nantong Shen Hai Industrial Technology Co., Ltd.

Address before: 226100, 27, Daqing Road, Qinglong harbor, Haimen, Jiangsu, Nantong

Patentee before: Nantong Shenhai Science and Industrial Technology Co.,Ltd.

CP03 Change of name, title or address
CP02 Change in the address of a patent holder

Address after: 226100, 27, Daqing Road, three factory, Haimen, Jiangsu, Nantong

Patentee after: Nantong Shen Hai Industrial Technology Co., Ltd.

Address before: 226100, No. 29, Daqing Road, three factory, Haimen, Jiangsu, Nantong

Patentee before: Nantong Shen Hai Industrial Technology Co., Ltd.

CP02 Change in the address of a patent holder