CN102436855B - Anticorrosion coating layer on surface of coil chamber of nuclear control bar driving device and preparation method thereof - Google Patents
Anticorrosion coating layer on surface of coil chamber of nuclear control bar driving device and preparation method thereof Download PDFInfo
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- CN102436855B CN102436855B CN201110297283.7A CN201110297283A CN102436855B CN 102436855 B CN102436855 B CN 102436855B CN 201110297283 A CN201110297283 A CN 201110297283A CN 102436855 B CN102436855 B CN 102436855B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention discloses an anticorrosion coating layer on surface of a coil chamber of a nuclear control bar driving device and a preparation method thereof; the surface anticorrosion coating layer is a Zn coating layer and arranged on all surfaces of the coil chamber; the Zn coating layer has a thickness of 0.05-0.13 mm and is prepared by a wire flame spraying method; the preparation method comprises the following steps of: (1) cleaning the to-be-coated surface of coil chamber by cleaning liquid and drying the to-be-coated surface; (2) pre-processing the to-be-coated surface for blasting sand; removing the passivation layer from the surface; purifying the surface to improve the roughness degree of the to-be-coated surface; and (3) conveying Zn wires stably by a wire sending control device in the atmospheric environment; spraying the Zn wires by a flame spraying gun taking propane and oxygen as the gas; and deposing Zn coating layer on the surface of the coil chamber. An anticorrosion coating layer is formed by coating Zn wires on the surface of the coil chamber of nuclear control bar driving device for protecting the coil chamber against corrosion for a long time. Meanwhile, the coil chamber is prevented from being rusted caused by oxidization, the service life of the part is prolonged and the normal operation of the nuclear control bar driving device is effectively ensured by the anticorrosion coating layer.
Description
Technical field
The present invention relates to the manufacture field of nuclear control rod drive unit, specifically a kind of anticorrosion coating layer on surface of coil chamber of nuclear control bar driving device, and the preparation method of this surface anticorrosion coating.
Background technology
Nuclear reactor control aspect is one of important core technology of nuclear power, if reactor has an accident or occurs certain emergency condition when operation, can utilize control system rapidly control rod to be inserted in reactor, in 2 seconds, just can, by reactor shut-down, guarantee the safe and reliable of reactor.Therefore, nuclear control rod drive unit (Control Rod Drive Mechanism is called for short CRDM) plays very important effect in whole system.Once after the coil chamber's installation in control rod drive, by in the larger air of humidity, military service reaches about 30 years, the matrix material of coil chamber is cast iron materials, is easy to oxidation in atmosphere, on its surface, produces one deck oxide, there is corrosion phenomena, this phenomenon can affect the normal work of control rod drive coil, more seriously affects the operation of control rod drive whole system, and this phenomenon is the situation that never allows appearance in nuclear power field.Thereby, need to prepare one deck corrosion-inhibiting coating at coil chamber surface, in case coil chamber produces corrosion phenomena in long-term work, affect effective operation of nuclear control rod drive unit.
At present; abroad control rod drive manufacturer produces corrosion phenomena in order to prevent coil chamber in long-term work; one deck spelter coating is prepared on the Shi control rod drive coil chamber surface of taking; as coil chamber surface, provide fabulous cathodic protection; even under extremely harsh corrosion environment; corrosion-inhibiting coating local damage, spelter coating still can have the effect that itself Er Dui coil chamber of long-term sacrifice matrix forms protection, can effectively prevent coil chamber's generation corrosion phenomena.Yet in order to realize interests maximization and the consideration to national development strategy aspect, foreign-made business classifies this technology as technology its core and nonnegotiable.Domestic nuclear control rod drive unit manufacturer has to spend fancy price from external imported product, this has not only restricted the normal development of the excellent drive unit of domestic nuclear control manufacturer, and the Nuclear Electricity that more seriously concerns national comprehensive development lifeblood is under one's control.
For breaking technical monopoly, form independent intellectual property right, realize the production domesticization of nuclear control rod drive unit hot spray coating, the research and development of carrying out the spraying zinc corrosion-inhibiting coating production domesticization of nuclear control rod drive unit coil chamber are significant.
Summary of the invention
The object of the invention is to: for China in the blank aspect nuclear control rod drive unit coil chamber aseptic technic, break blockade on new techniques and the monopolization of external control rod drive manufacturer, a kind of antioxygenic property of independent research is good, coil chamber be difficult for to produce corrosion, the effectively anticorrosion coating layer on surface of coil chamber of nuclear control bar driving device in extension coil chamber serviceable life, and the preparation method of this surface anticorrosion coating.
Technical purpose of the present invention is achieved through the following technical solutions.
An anticorrosion coating layer on surface of coil chamber of nuclear control bar driving device, described surface anticorrosion coating is Zn coating, adopts silk material flame spraying method to make.
Described surface anticorrosion coating is positioned at coil chamber's all surface, and described all surface comprises orifice surface on outside surface, inside surface and inside surface.
The thickness of described surface anticorrosion coating is 0.05～0.13mm.
Preferably, the thickness of described surface anticorrosion coating is 0.09～0.10mm.
A preparation method for above-mentioned anticorrosion coating layer on surface of coil chamber of nuclear control bar driving device, comprises following order step:
(1). use the clean coil chamber to be sprayed of cleaning fluid surface, and dry up;
(2). treat sprayed surface and do sandblast pretreatment, remove surface passivation layer, and purify surface, increase the roughness on surface to be sprayed;
(3). under atmospheric environment, use the stable Zn of conveying of wire feeding centrol device silk, use and take the silk material flame gun spraying Zn silk that propane and oxygen is combustion gas, in coil chamber surface deposition Zn coating.
Spraying design parameter in step (3) is: oxygen pressure is 40～60PSI, oxygen flow is 60～85NLPM, propane pressure is 30～50PSI, propane flow is 6～20NLPM, compressed air pressure is 60～80PSI, compressed air require is 580～680NLPM, and wire feed rate is 1.5～4.0m/min, and spray distance is 100～180mm.
Spray tip internal diameter in step (3) is Ф 3.175 mm.
Zn silk specification in step (3) is Ф 3.17 mm, and the requirement of Zn silk composition is: nominal Zn is 99.995%, Pb, Cd, Fe, Sn, Cu and Al impurity element sum≤0.005%; And the content requirement of single impurity element is: Pb≤0.003%, Cd≤0.003%, Fe≤0.002%, Sn≤0.001%, Cu≤0.001%, Al≤0.001%.
Cleaning fluid in step (1) adopts acetone and the absolute ethyl alcohol cleaning fluid mixing with 3:1 ratio, uses ultrasound wave to carry out cleaning.
Drying up in step (1) be take through filtrator filter and the temperature of well heater heating is 20～50 ℃ totally, dried compressed air dries up.
Sandblast in step (2) adopts and mixes white fused alumina, and described mixing white fused alumina is that the ratio with 6:3:1 mixes by 24# white fused alumina, 46# white fused alumina and 60# white fused alumina.
Sandblast design parameter in step (2) is: blasting pressure is 0.3～0.6MPa, and sandblast angle is 15～75 °, and sandblast distance is 100～150mm.
The beneficial effect that the present invention produces is:
The present invention forms corrosion-inhibiting coating by the surface spraying Zn of the coil chamber silk material at nuclear control rod drive unit, this corrosion-inhibiting coating can play the protective effect of long-effective corrosion to coil chamber, prevent that coil chamber from producing corrosion phenomena because of oxidation, extend the serviceable life of these parts, effectively guaranteed the stable and normal operation of control rod drive system;
Preparation method of the present invention adopts take the silk material flame spraying technique that propane and oxygen is combustion gas, Zn corrosion-inhibiting coating is successfully applied in the coil chamber of control rod drive, the method in the temperature of spraying process coil chamber lower than 150 ℃, after spraying, without subsequent heat treatment, coil chamber can not be out of shape; And this Zn corrosion-inhibiting coating surface is without naked eyes visual defects, there is no crackle, foaming, caking or without injurous defects such as coatings, coating surface solid colour, coating thickness is even, and coating is fine and close, and porosity is low, the adhesion of coating is good, after testing without disbonding situation.In addition, in coil chamber, prepare the cost that Zn corrosion-inhibiting coating also effectively reduces production control rod drive unit coil chamber, can guarantee coil chamber's military service steady in a long-term, guarantee the stable operation of nuclear control rod drive unit, obvious economic.
The prepared anticorrosion coating layer on surface of coil chamber of nuclear control bar driving device excellent performance of the present invention, coating surface outward appearance, coating thickness, coating adhesion all reach standard-required, refer to table 1.
The performance table of table 1 anticorrosion coating layer on surface of coil chamber of nuclear control bar driving device
Accompanying drawing explanation
Fig. 1 is the step schematic diagram of coating production of the present invention.
Embodiment
Along with the development of plasma spray technology, the coating of thermal spray can be used for the protection of steel and iron parts under corrosion environment in recent years.At industrial atmosphere and region, ocean, provide more than 20 years long-effective protections, existing practice is recorded.In anti-atmosphere protection, widespread use be the coating of zinc and aluminium, their corrosion stability is all good than steel, to atmospheric corrosion, is the effective protective barrier of one deck.Concerning steel, zinc and aluminium are anodes, and in electrolytic solution, they shield to iron-based body, and coating is carried out work, own loss as consuming anode.The protective effect of this preservation negative electrode, even if coating covers not exclusively or is subject to mechanical damage, also can play the protective effect to matrix.The present invention is first to spraying with the sample of nuclear control rod drive unit coil chamber identical material, at aspects such as coating structure and performance evaluations, a large amount of tests and research have been carried out, again nuclear control rod drive unit coil chamber surface is sprayed and analyzed, finally obtained the optimum implementation of the surface silk material flame spraying Zn of nuclear control rod drive unit coil chamber coating, according to actual conditions, the present invention selects Zn(zinc) as anticorrosion coating material, the mode of the silk material flame spraying that propane and oxygen is combustion gas is take in employing, on nuclear control rod drive unit coil chamber surface, prepare one deck corrosion-inhibiting coating, surface anticorrosion coating is positioned at coil chamber's all surface, this all surface includes but are not limited to outside surface, orifice surface on inside surface and inside surface, the thickness of surface anticorrosion coating is 0.09mm.Zn coating has excellent antiseptic power, can meet the applying working condition of nuclear control rod drive unit coil chamber completely.
The coating thickness value of corrosion-inhibiting coating of the present invention is except selecting above-mentioned 0.09mm; can also select the numerical value such as 0.07mm, 0.08mm, 0.10mm, 0.11mm or 0.12mm, as long as the coating thickness value of corrosion-inhibiting coating all can reach the protective effect of long-effective corrosion within the scope of 0.05～0.13mm.
The present invention, in the preparation method of nuclear control rod drive unit coil chamber, comprises following order step (referring to Fig. 1):
(1). supplied materials to be sprayed is checked, check the defective last process that returns, passed examination enters lower road matting again; Acetone and absolute ethyl alcohol mixing cleaning fluid that employing mixes with 3:1 ratio, and use ultrasound wave to carry out cleaning to coil chamber surface to be sprayed, remove greasy dirt and the foreign matter on surface to be sprayed; Take through filtrator filter and the temperature of well heater heating is 25 ℃ totally, dried compressed air dries up coil chamber surface to be sprayed dried up, this compressed-air actuated temperature can also be selected 30 ℃, 36 ℃, 41 ℃, 47 ℃ equivalences, as long as compressed-air actuated temperature value, within the scope of 20～50 ℃, just can be realized the object of the invention;
(2). treat sprayed surface and do sandblast pretreatment, sandblast adopts and mixes white fused alumina, this mixing white fused alumina is that the ratio with 6:3:1 mixes by 24# white fused alumina, 46# white fused alumina and 60# white fused alumina, the optimal processing parameter that sandblast is chosen refers to table 4, with this, treat sprayed surface and carry out sandblast activation processing, remove surface passivation layer, and cleaning, purify surface to be sprayed, increase the roughness on surface to be sprayed;
(3). prepare spraying Zn silk, the specification of spraying Zn silk is Ф 3.17 mm, the composition of Zn silk requires to refer to table 2, after spraying Zn silk is qualified, under atmospheric environment, use the stable Zn of conveying of wire feeding centrol device silk, use be take flame gun that propane and oxygen is combustion gas to surface spraying Zn silk to be sprayed, the nozzle inside diameter of spray gun is Ф 3.175 mm, and the Zn silk of spraying is in coil chamber surface deposition Zn coating, and the optimal processing parameter that spraying is chosen refers to table 3; Cleaning coating, and coating is repaired; Check coating, if coating is qualified, sprayed; If coating is defective, return to step (2), use the method for sandblast, by coating removal, preparation again.
Table 2 zinc silk composition requires table
Note: Pb, Cd, Fe, Sn, Cu and Al element sum answer≤0.005%.
The optimal processing parameter table of a table 3 material flame spraying
When using the selected Zn silk material flame spraying method of the present invention to spray the workpiece of other size, only need carry out suitably adjusting to above-mentioned technological parameter.
The optimal processing parameter table of table 4 blasting treatment
Claims (2)
1. a preparation method for anticorrosion coating layer on surface of coil chamber of nuclear control bar driving device, this surface anticorrosion coating is Zn coating, and the thickness of surface anticorrosion coating is 0.09～0.10mm, and its preparation method comprises following order step:
The clean coil chamber to be sprayed of the acetone that employing mixes with 3:1 ratio and absolute ethyl alcohol cleaning fluid surface, is used ultrasound wave to carry out cleaning to coil chamber surface to be sprayed; Take and filter and that the temperature of well heater heating is 20～50 ℃ is clean, dried compressed air dries up coil chamber to be sprayed is surperficial through filtrator;
Treat sprayed surface and do sandblast pretreatment, sandblast adopts and mixes white fused alumina, this mixing white fused alumina is that the ratio with 6:3:1 mixes by 24# white fused alumina, 46# white fused alumina and 60# white fused alumina, sandblast design parameter is: blasting pressure is 0.3～0.6MPa, sandblast angle is 15～75 °, and sandblast distance is 100～150mm; With this, sandblast activation processing is carried out in coil chamber surface to be sprayed, remove surface passivation layer, and purify surface, increase the roughness on surface to be sprayed;
Prepare spraying Zn silk, the specification of spraying Zn silk is Ф 3.17 mm, the composition of Zn silk requires: nominal Zn is 99.995%, Pb, Cd, Fe, Sn, Cu and Al impurity element sum≤0.005%, and the content requirement of single impurity element is: Pb≤0.003%, Cd≤0.003%, Fe≤0.002%, Sn≤0.001%, Cu≤0.001%, Al≤0.001%; After spraying Zn silk is qualified, under atmospheric environment, use the stable Zn of conveying of wire feeding centrol device silk, wire feed rate is 1.5～4.0m/min, the silk material flame gun spraying Zn silk that propane and oxygen are combustion gas is take in use, the nozzle inside diameter of spray gun is Ф 3.175 mm, spraying design parameter is: oxygen pressure is 40～60PSI, oxygen flow is 60～85NLPM, propane pressure is 30～50PSI, and propane flow is 6～20NLPM, and compressed air pressure is 60～80PSI, compressed air require is 580～680NLPM, and spray distance is 100～180mm; The Zn silk of spraying is in coil chamber surface deposition Zn coating.
2. the preparation method of anticorrosion coating layer on surface of coil chamber of nuclear control bar driving device according to claim 1, it is characterized in that, described surface anticorrosion coating is positioned at coil chamber's all surface, and described all surface comprises orifice surface on outside surface, inside surface and inside surface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110297283.7A CN102436855B (en) | 2011-09-29 | 2011-09-29 | Anticorrosion coating layer on surface of coil chamber of nuclear control bar driving device and preparation method thereof |
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| CN201110297283.7A CN102436855B (en) | 2011-09-29 | 2011-09-29 | Anticorrosion coating layer on surface of coil chamber of nuclear control bar driving device and preparation method thereof |
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| CN102436855B true CN102436855B (en) | 2014-04-02 |
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| CN110294953B (en) * | 2019-06-25 | 2022-01-04 | 东方电气集团东方汽轮机有限公司 | Nuclear control rod coil chamber and corrosion prevention method thereof, surface coating preparation method and application of aluminum powder coating in nuclear control rod coil chamber |
Citations (4)
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| JP2002243883A (en) * | 2001-02-09 | 2002-08-28 | Ishikawajima Harima Heavy Ind Co Ltd | Corrosion resistive construction method for suppression chamber |
| CN1807326A (en) * | 2006-01-10 | 2006-07-26 | 西安理工大学 | Rust-proof cast iron glass craft production method |
| JP2010164508A (en) * | 2009-01-19 | 2010-07-29 | Hitachi-Ge Nuclear Energy Ltd | Control rod |
| CN102166687A (en) * | 2011-01-24 | 2011-08-31 | 河南理工大学 | Preparation method of heat-resisting steel tube instant liquid phase diffusion connection interlayer alloy |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20020080906A1 (en) * | 2000-12-21 | 2002-06-27 | Andresen Peter L. | Noble metal catalysis for mitigation of corrosion, erosion and stress corrosion cracking in pressurized water reactor and related high temperature water environments |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002243883A (en) * | 2001-02-09 | 2002-08-28 | Ishikawajima Harima Heavy Ind Co Ltd | Corrosion resistive construction method for suppression chamber |
| CN1807326A (en) * | 2006-01-10 | 2006-07-26 | 西安理工大学 | Rust-proof cast iron glass craft production method |
| JP2010164508A (en) * | 2009-01-19 | 2010-07-29 | Hitachi-Ge Nuclear Energy Ltd | Control rod |
| CN102166687A (en) * | 2011-01-24 | 2011-08-31 | 河南理工大学 | Preparation method of heat-resisting steel tube instant liquid phase diffusion connection interlayer alloy |
Non-Patent Citations (4)
| Title |
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| 日本热喷涂防腐应用现状;馬込正勝;《热喷涂技术》;20090930;第1卷(第1期);8-13 * |
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| 锌铝涂层制备工艺的研究进展及其应用;董彩常等;《材料保护》;20110430;第44卷(第4期);24-28 * |
| 馬込正勝.日本热喷涂防腐应用现状.《热喷涂技术》.2009,第1卷(第1期),8-13. |
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