CN101122043A - Nano tungsten carbide-nickel composite coat and its preparation method and application - Google Patents
Nano tungsten carbide-nickel composite coat and its preparation method and application Download PDFInfo
- Publication number
- CN101122043A CN101122043A CNA2007100658603A CN200710065860A CN101122043A CN 101122043 A CN101122043 A CN 101122043A CN A2007100658603 A CNA2007100658603 A CN A2007100658603A CN 200710065860 A CN200710065860 A CN 200710065860A CN 101122043 A CN101122043 A CN 101122043A
- Authority
- CN
- China
- Prior art keywords
- nano
- tungsten carbide
- nickel
- nano tungsten
- coating
- 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
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 37
- 239000002131 composite material Substances 0.000 title claims abstract description 22
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title claims abstract description 14
- 229910052721 tungsten Inorganic materials 0.000 title claims abstract description 14
- 239000010937 tungsten Substances 0.000 title claims abstract description 14
- 238000002360 preparation method Methods 0.000 title abstract description 10
- 238000000576 coating method Methods 0.000 claims abstract description 47
- 239000011248 coating agent Substances 0.000 claims abstract description 44
- 239000002245 particle Substances 0.000 claims abstract description 23
- 238000003756 stirring Methods 0.000 claims abstract description 20
- 239000011159 matrix material Substances 0.000 claims abstract description 12
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims abstract description 12
- CVHZOJJKTDOEJC-UHFFFAOYSA-N saccharin Chemical compound C1=CC=C2C(=O)NS(=O)(=O)C2=C1 CVHZOJJKTDOEJC-UHFFFAOYSA-N 0.000 claims abstract description 3
- 229940081974 saccharin Drugs 0.000 claims abstract description 3
- 235000019204 saccharin Nutrition 0.000 claims abstract description 3
- 239000000901 saccharin and its Na,K and Ca salt Substances 0.000 claims abstract description 3
- 239000003381 stabilizer Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 26
- 238000009713 electroplating Methods 0.000 claims description 22
- 239000000463 material Substances 0.000 claims description 10
- 238000000975 co-precipitation Methods 0.000 claims description 9
- 238000005299 abrasion Methods 0.000 claims description 4
- 238000005260 corrosion Methods 0.000 claims description 4
- 230000007797 corrosion Effects 0.000 claims description 3
- 239000000080 wetting agent Substances 0.000 claims description 3
- 241000080590 Niso Species 0.000 claims description 2
- 239000002671 adjuvant Substances 0.000 claims description 2
- 238000005187 foaming Methods 0.000 claims 1
- 238000007747 plating Methods 0.000 abstract description 69
- 239000011858 nanopowder Substances 0.000 abstract description 13
- 239000000843 powder Substances 0.000 abstract description 9
- 230000002776 aggregation Effects 0.000 abstract description 3
- 239000003795 chemical substances by application Substances 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 3
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 abstract description 2
- 239000006260 foam Substances 0.000 abstract description 2
- 239000002086 nanomaterial Substances 0.000 abstract description 2
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 abstract description 2
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 abstract description 2
- KTVIXTQDYHMGHF-UHFFFAOYSA-L cobalt(2+) sulfate Chemical compound [Co+2].[O-]S([O-])(=O)=O KTVIXTQDYHMGHF-UHFFFAOYSA-L 0.000 abstract 2
- JQGGAELIYHNDQS-UHFFFAOYSA-N Nic 12 Natural products CC(C=CC(=O)C)c1ccc2C3C4OC4C5(O)CC=CC(=O)C5(C)C3CCc2c1 JQGGAELIYHNDQS-UHFFFAOYSA-N 0.000 abstract 1
- 238000004220 aggregation Methods 0.000 abstract 1
- 239000012752 auxiliary agent Substances 0.000 abstract 1
- 239000002114 nanocomposite Substances 0.000 description 24
- 239000000203 mixture Substances 0.000 description 11
- 229910001220 stainless steel Inorganic materials 0.000 description 11
- 239000010935 stainless steel Substances 0.000 description 11
- 238000012360 testing method Methods 0.000 description 9
- 238000007751 thermal spraying Methods 0.000 description 7
- 239000002105 nanoparticle Substances 0.000 description 6
- 239000007787 solid Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000007423 decrease Effects 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 238000007749 high velocity oxygen fuel spraying Methods 0.000 description 4
- 239000002103 nanocoating Substances 0.000 description 4
- 239000000725 suspension Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 229910017052 cobalt Inorganic materials 0.000 description 3
- 239000010941 cobalt Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000010288 cold spraying Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000001000 micrograph Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 238000005282 brightening Methods 0.000 description 1
- 239000010406 cathode material Substances 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- GGVOVPORYPQPCE-UHFFFAOYSA-M chloronickel Chemical compound [Ni]Cl GGVOVPORYPQPCE-UHFFFAOYSA-M 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 235000009508 confectionery Nutrition 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 210000003734 kidney Anatomy 0.000 description 1
- 238000009533 lab test Methods 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
Images
Landscapes
- Electroplating Methods And Accessories (AREA)
- Electroplating And Plating Baths Therefor (AREA)
Abstract
A nano tungsten carbide-nickel composite coating, and a preparation method and application of the coating belongs to the technical field of an interdisciplinary science of plating and nano materials. The coating consists of the matrix nickel and nano tungsten carbide particles firmly laid in the nickel. The bath solution includes: NiSO4 question mark 7H2O: 130 to 200g/L, NiC12: 30 to 50g/L, nano tungsten carbide: 30 to 80g/L, CoSO4: 2 to 10g/L, H3BO3:30 to 50g/L, saccharin:3 to 5g/L, FK-370 low foam wetter: 2 to 5g/L, FK-287A main light agent: 1 to 3g/L, FK-287B auxiliary agent: 2 to 4g/L, FK-287C stabilizer: 10 to 20g/L; the plating technological conditions are as follows: 2 to 10g/L CoSO4 codeposition accelerant is added in: interval stirring at 60 to 90round/minute; the temperature of the bath solution is 25 to 35DEG C; the current density of the cathode is 15 to 25 ampere/dm2; the pH value of the bath solution is 3 to 5; the area ratio of the cathode to the anode is 2 to 3. The invention has advantages of low cost, high utility rate of the nano powder, no decaying of the nano tungsten carbide powder in preparation, and no need of aggregation and processing of the nano powder in advance, etc.
Description
The technical field is as follows:
the invention relates to a nano tungsten carbide-nickel composite coating and a preparation method and application thereof, belonging to the technical field of interdisciplinary subjects of electroplating and nano materials.
Background art:
compared with the conventional tungsten carbide-metal cobalt composite coating, the nano tungsten carbide-cobalt composite coating has the advantages of small porosity of the coating, strong bonding force between the coating and a base material, higher corrosion resistance and abrasion resistance of the coating and the like, and can become a high-performance abrasion-resistant hydraulic mechanical material in the middle and last stage of the 21 st century, thereby arousing the interest of researchers of nano coating materials at home and abroad. At the end of the 20 th century, developed countries such as the United states began to research the preparation of nano tungsten carbide-cobalt (hereinafter abbreviated as nWC-Co) nano composite coatings by using a supersonic thermal spraying method (abbreviated as HVOF, which is abbreviated as High velocity oxygen fuel) and a plasma thermal spraying method [1、2] . However, the (nWC-Co) coatings prepared by the two thermal spraying methods have a plurality of defects: if the flying loss of the nano powder is large, the effective utilization rate of the nano powder is only 30-40% in a small test, and the utilization rate of the nano powder is only 50-55% in a pilot test and production; in the process, the nano powder is contacted with high temperature and oxygen, and the nano coating can generate mass decay, namely, the mass decay occurs
And W 2 C+O 2 →2W+CO 2 The WC content in the coating is reduced, thereby causing the hardness and wear resistance of the coating to be reduced: in addition, when various thermal spraying methods are used for preparing the nano coating, the nano powder needs to be subjected to agglomeration processing in advance, so that the cost of the coating is increased, and the like. To overcome these disadvantages, korean researchers proposed the preparation of (nWC-Co) nanocomposite coatings by a cold spray method [3] That is, instead of generating high temperature by oxygen and fuel combustion, the (nWC-Co) composite powder preheated to 600-650 ℃ is carried by the high-speed gas flow of the inert gas preheated to 650-750 ℃ in the electric heating furnace and is sprayed onto the steel substrate at high speed, and the (nWC-Co) nano composite coating is formed by the action of high speed and preheating temperature. However, although the cold spray method of korean researchers has overcome some of the disadvantages of decay of nano tungsten carbide powder occurring in plasma thermal spraying and HVOF thermal spraying, problems still remain in that the nano powder is seriously scattered and lost, the effective utilization rate of nano powder is low, and the like. Meanwhile, according to the experiments conducted by the present inventors,in the temperature and process of cold spraying, the obtained (nWC-Co) nanocomposite coating cannot form a strong bond with the substrate steel even with HVOF spray swing and at the same spray velocity as HVOF. Furthermore, the powder of the (nWC- -Co) coating is very expensive.
Reference documents:
[1]S.Usmani，S.Sampath and H.Herman：“HVOF Processing of Nanostructure (WC-Co)coating and their properties”[J].“Journal of thermal spray Technology”， V0l 8(4).Sept.1999。
[2]M.shool，M.Becker and D.Atteridge：“Microstructure and properties of plasma sprayed Nanoscale(WC-Co)coatings”[J].“Journal of Thermal spray Technology.”V0l.7(3)，sept.1998。
[3]Hyung-Jun Kim，Chang-Hee Lee and soon-Yong Hwang：“Feabrication of WC-Co coatings by cold spray deposition”[J]，“Surf.Coat Technology”191(2005)。
[4] xu-coast: "Nano surface engineering" (M) chemical industry Press (2003).
[5] Metropolis society for surface treatment: "electroplating technology", sichuan people Press (1982).
[6]Zhao Y P，Huang Y H：“Review of preparing nanocrystalline materials by electrodepositing”[J]，“Journal of Materials science and Engineering”，2003， 21(1)。
[7]Freyland w，Zell C.A，Abedin S，et al：“Nanoscale electrodeposition of Metals and semiconductors from ionic Liquids”[J]“Electrochimica Acta，”2003， 48(21-22)。
The invention content is as follows:
the invention aims to overcome the defects of the prior art and provides a nano tungsten carbide-nickel composite coating which has low cost and high utilization rate of nano powder and can not generate WC nano powder quality decay, and a preparation method and application thereof
The nano tungsten carbide-nickel composite coating consists of matrix nickel and nano tungsten carbide particles firmly embedded in the matrix nickel.
The invention uses the improved composite electroplating method to prepare the (nWC-Ni) nano tungsten carbide-nickel composite coating, and the specific method is as follows:
(1) The electroplating solution comprises the following components: nanocarstenium carbide (nWC) powder was purchased from the company inframat, USA, with a particle size of 30-100 nm. The electroplating solution is composed of conventional rapid nickel plating solution [5] Insoluble nano tungsten carbide powder, a coprecipitation promoter, a brightening agent, a wetting agent and the like are added, and the specific components are shown in table 1.
TABLE 1 plating bath composition for nanocomposite plating (nWC-Ni)
| Plating bath composition | Content (wt.) /g/L | Plating bath composition | Content (wt.) /g/l |
| Nickel sulfate (NiSO4.6H) 2 O) | 130-200 | CoSO as co-precipitation promoter 4 | 1-10 |
| Nickel chloride (NiCl) 2 ) | 40-50 | FK-370 low foam wetting agents | 2-5 |
| Nano tungsten carbide powder (nWC), (particle size) 30-100nm) | 30-80 | FK-278A major light agent | 1-3 |
| Boric acid (H) 3 BO 3 ) | 30-50 | FK-287B adjuvants | 24 |
| Saccharin | 3-5 | FK-287C stabilizers | 10-20 |
(2) Electroplating equipment and device: in the laboratory test, the plating apparatus was substantially the same as that of conventional nickel plating, except that a glass rod fired stirrer (4) was placed between the anode and cathode as shown in FIG. 1, and the anode was a commercially available electrolytic nickel plate and the cathode was a stainless steel plate. The agitator is driven by a motor whose rotation speed is controlled by a pressure regulator so as to form the movement of the plating solution and the suspension of nano WC particles. In large-scale production, a stirrer is not used, and a plastic acid-proof pump is used for driving the circulating plating solution to form the tumbling motion of the plating solution so as to keep the movement of the plating solution and the suspension of the WC nano particles.
(3) The process method of the nano composite electroplating comprises the following steps:
the test result shows that the coprecipitation accelerant and the addition thereof, the stirring strength, the cathode current density, the plating solution temperature and the like are key influence factors influencing the preparation of the (nWC-Ni) nano composite plating layer by composite electroplating.
The coprecipitation promoter is an additive for promoting coprecipitation of insoluble solid particles (nWC) with a matrix metal nickel on a cathode, and in most cases, the coprecipitation promoter is a cationic surfactant to which the insoluble solid particles WC can adsorb [6、7] . Various co-precipitation promoters have been tested in this study, but with CoSO 4 The effect of (2) is better. The test results show that CoSO is present in the plating solution 4 When the addition amount of the nickel-based plating solution is in the range of 0 to 0.6 g/L, the plating layer is almost all matrix nickel, the microhardness of the plating layer is only Hmv 300-380, and when CoSO is contained in the plating solution 4 The addition amount of the (nWC) nano-particles is in the range of 3-10 g/l, the higher (nWC) nano-particles content can be obtained in the coating, and the microhardness of the coating is also as high as Hmv1020-1100.
The non-stirring or excessive stirring of the plating solution can cause that nano WC particles are not co-precipitated with nickel on the cathode and cannot form a (nWC-Ni) nano composite plating layer. The non-stirring will not form a uniform suspension of nano WC, but the stirring speed is too high, the speed of the solid particles moving with the liquid increases, and the impact force of the liquid on the cathode surface increases, which not only makes it difficult for the nano particles to adhere to the cathode surface, but also makes the particles, which have adhered to the cathode surface but not yet firmly embedded by the matrix metal, leave the cathode surface again and enter the solution. Therefore, a reasonable stirring speed and stirring time are sought. The test result shows that no stirring or high-speed continuous stirring is performed, only a very small amount of (nWC) particles are co-deposited in the coating, the microhardness Hmv of the coating is as low as 450 to 500, the coating is stirred at the speed of 60 to 90 rpm for 15 seconds within 60 seconds, the stirring is stopped for 15 seconds, the stirring is performed for 15 seconds, and then the intermittent stirring mode is performed for 15 seconds, so that more (nWC) particles and matrix nickel are co-precipitated, and the coating can obtain higher hardness.
The cathode current density Dk also has great influence on the (nWC-Ni) nano composite coating, because the conveying speed of WC solid particles in the coating solution to the cathode does not follow D k Is increased, so when D is increased k Too large, it results in depletion of nano-WC particles near the cathode, and ultimately a decrease in the nano-WC content of the resulting cathode deposit. The study was examined by palpating and confirming D k At 5-25A/dm 3 In the range of (1), the content of nano WC in the coating is all along with that of D k Is increased. When D is k Over 25A/dm 2 After the range of (3), the content of WC in the coating and the hardness of the coating follow D k The increase in (c) instead decreases. When D is k At 1825A/dm 2 The electroplating within the range of (1) can obtain higher cathode deposition speed and better plating performance.
The plating solution temperature also has a great influence on the effect of the (nWC-Ni) nano-coating. The temperature of the plating solution of the conventional electroplated nickel is 55 to 65 ℃, but in the nano composite electroplating of (nWC-Ni), the high temperature leads Co-precipitation promoter ion Co adsorbed on the solid particles of (nWC) +2 In addition, the desorption and the excessive temperature lower the overpotential of the cathode, which weakens the force of the electric field, and consequently makes it difficult to embed the (nWC) aerosol particles in the nickel coating. The results of this study show that composite plating at a plating solution temperature of 25 to 35 ℃ can obtain a plating layer with a high (nWC) particle content and a corresponding plating layer with a high hardness, while composite plating at a high temperature of 50 to 60 ℃ can only obtain a plating layer with a very low (nWC) particle content and a low hardness. Thus, it was confirmed that 25 to 35 ℃ is a reasonable temperature range for conducting (nWC-Ni) nanocomposite plating.
In conventional nickel electroplating, the PH of the bath has a large effect on the plating results. However, in the (nWC-Ni) nanocomposite plating, the influence of the pH value is not significant. This is becauseIn nanocomposite plating, H is increased when the pH is raised + The reduced concentration of (b) leads to a reduced amount of hydrogen evolution at the cathode, which is beneficial for improving the quality of the cathode coating. On the other hand, however, after the pH value is raised, H + The decrease in concentration also reduces the adsorption of nano-solid particles by the cathode, which in turn leads to a decrease in the content of (nWC) nano-particles in the coating and a decrease in the hardness of the coating. The above two results are complementary, thus the pH value of the plating solution is kept wide, and the experiment shows that the ideal plating layer can be obtained when the pH is changed within the range of 3-5.
The nano tungsten carbide-nickel composite coating is used as an anti-corrosion component material of hydraulic machinery and other component materials requiring corrosion resistance and wear resistance.
Compared with the (nWC-Co) nano composite coating prepared by a thermal spraying or cold spraying method currently developed abroad, the method has the advantages of low cost, high utilization rate of nano powder, no decay of the nano tungsten carbide powder in the preparation process, no need of pre-agglomeration processing of the nano powder and the like.
Description of the drawings:
FIG. 1 is a (nWC-Ni) nanocomposite plating apparatus in a 1000ml beaker plating tank in a laboratory, wherein: the device comprises a motor (1), a nickel anode (2), a 1Cr13 stainless steel cathode (3), a stirrer (4), a beaker electroplating tank (5), a water bath kettle (6), a beaker support (7), a thermometer (8) and an electroplating suspension (9).
FIG. 2 is a graph showing the relationship between the micro-hardness of the plating layer and the pH of the plating solution measured by plating with changing the pH under the conditions of the plating process other than the pH and the composition of the plating solution in example 1.
FIG. 3 is a 600-fold magnified micrograph of the (nWC-Ni) nanocomposite coating obtained under the plating bath composition and plating process conditions of example 1, with the air layer being the black area to the right of the coating.
FIG. 4 is a magnified image of a scanning electron microscope of the surface of the (nWC-Ni) nanocomposite coating obtained under the conditions of the plating solution composition and the plating process of example 1, wherein the particles are superposed images of different levels of nano WC particles embedded in matrix nickel.
Fig. 5 is a result of X-ray diffraction phase analysis of the plating layer of fig. 4 alone after being peeled from the substrate stainless steel, showing that the plating layer consists of only two phases of nickel and WC, and has no decay.
FIG. 6 shows a nozzle tip and an insert ring of an impulse turbine subjected to (nWC-Ni) nanocomposite plating, wherein the cone is the nozzle tip and the ring is the insert ring.
The specific implementation mode is as follows:
the nano tungsten carbide powder is purchased from Infrant company in the U.S. A, and additives such as FK-370, FK-287A, FK-287B, FK-287C and the like are purchased from domestic electroplating material markets.
Example 1:
on a 3X 2cm 1Cr13 stainless steel cathode test piece, (nWC-Ni) nanocomposite plating was carried out, the composition of the plating solution is shown in Table 2 below, and the plating process conditions are shown in Table 3 below.
TABLE 2 bath composition (g/l) of the examples
| NiSO 4 ·7H 2 O | Nicl 2 | (nWC) | CoSO 4 | H 3 BO 3 | Candy Extract of Chinese medicinal materials | FK- 370 | FK- 287A | FK- 287B | FK- 287C | |
| Practice of Example 1 | 130 | 50 | 30 | 2 | 30 | 3 | 2 | 1 | 2 | 10 |
| Practice of Example 2 | 200 | 30 | 80 | 10 | 50 | 5 | 5 | 3 | 4 | 20 |
| Practice of Example 3 | 165 | 40 | 55 | 6 | 40 | 4 | 3 | 2 | 3 | 15 |
TABLE 3 electroplating Process conditions for the examples
| Cathode current Density of (A/dm 2 ) | Temperature of plating solution (℃) | Stirring within 30 seconds | Plating solution pH value | During electroplating Workshop (h) | Yin and yang Polar surface Product ratio | Cathode and anode material | |||
| Time | Speed of rotation | Yang (Yang) | Yin (kidney) | ||||||
| Practice of Example 1 | 15 | 25 | 15 | 60 | 5 | 8 | 2∶3 | Electric nickel | 1Cr13 |
| Practice of Example 2 | 25 | 35 | 15 | 90 | 3 | 6 | 2∶3 | Electric nickel | 1Cr13 |
| Practice of Example 3 | 20 | 30 | 15 | 70 | 4 | 7 | 2∶3 | Electric nickel | 1Cr13 |
A3X 2cm stainless steel test piece was subjected to plating for 8 hours under the plating bath composition of example 1 in Table 2 and under the process conditions of example 1 in Table 3 to obtain an about 0.2mm thick (nWC-Ni) nanocomposite plated layer having a microhardness of Hmv1020 to 1100 as measured by the process conditions of example 1. FIG. 3 is a photomicrograph of a cross-section of the test piece at 600 times magnification. FIG. 4 is a scanning electron microscope image of the surface of an unetched plating layer, in which approximately spherical superposed deposits are WC nanoparticles embedded in matrix nickel. The test piece was subjected to rapid heating and quenching to peel off the plating layer from the stainless steel base material, and the resultant X-ray diffraction phase analysis of the peeled plating layer revealed that the plating layer consisted of matrix nickel and nano WC second phase particles, as shown in fig. 5.
Example 2:
the nozzle head of the impulse turbine with the capacity of 4 thousands KW is made of 1Cr13 stainless steel, and the weight of the nozzle head reaches 60 kilograms. In 1 meter 3 In the square plating tank, nanocomposite plating was carried out for 6 hours under the composition of the plating solution of example 2 in table 2, and under the operation process of example 2 in table 3. The photograph of the electroplated turbine nozzle tip is the cone in fig. 6.Through nano composite electricityThe plated water turbine nozzle is installed with an average annual silt content of 24 kg/m 3 The silt content in flood period reaches 58.7 kg/m 3 The head height of the power station is 128 meters. The (nWC-Ni) nano-composite electroplated water turbine nozzle head works continuously for 36 months, and is still in use, while the 1Cr13 stainless steel water turbine nozzle head which is not subjected to the composite electroplating is only continuously used for three months in a flood period, and is seriously cavitated and abraded at the tip part and the middle part and needs to be replaced. In dry seasons, the original 1Cr13 stainless steel spray needle which is not electroplated can only work continuously for 6 months at most, and is seriously damaged and needs to be replaced by a new piece.
Example 3:
an insert ring of impulse turbine with 4 KW capacity is made of 2Cr13 stainless steel and is used as cathode and placed in the position of 1 m capacity 3 In the plating bath of (2), (nWC-Ni) nanocomposite plating was carried out for 7.0 hours under the composition of the plating solution of example 3 in Table 2 and under the plating process conditions of example 3 in Table 3. The electroplated insert ring is a ring in the figure 6, is installed on a water turbine under the same conditions as the embodiment 2, obviously has cavitation erosion and abrasion gaps at a knife edge after the insert ring works for 32 months continuously, cannot completely seal water, and needs to be replaced by a new part, and the original 1Cr13 stainless steel insert ring can only work for three months continuously in a flood period and can also work for 6 months continuously in a dry period.
Claims (3)
1. The nano tungsten carbide-nickel composite coating is characterized by consisting of matrix nickel and nano tungsten carbide particles firmly embedded in the matrix nickel.
2. The method for preparing the nano tungsten carbide-nickel composite coating according to claim 1, which is prepared by a composite electroplating method, and is characterized in that:
a. the electroplating solution of the nickel-based nano tungsten carbide composite coating comprises the following components: niSO 4 ·7H 2 O:130-200 g/l, niCl 2 ： 30～50 g/l, nano tungsten carbide: 30-80 g/l, coSO 4 : 2-10 g/l, H 3 BO 3 :30-50 g/l, saccharin: 3-5 g/l, FK-370 low foaming wetting agent: 2-5 g/l, FK-287A brightener: 1-3 g/l, FK-287B adjuvant: 2-4 g/l, FK-287C stabilizer: 10-20 g/l;
b. the process conditions of the composite electroplating are as follows:
CoSO added to electroplating solution 4 The coprecipitation accelerator is 2-10 g/L; the stirring mode is as follows: stirring at 60-90 rpm for 15 s, stopping stirring for 15 s, and stopping stirring for 15 s, wherein the stirring is stopped for 15 s, and the stirring is interrupted at 8230one; the temperature of the electroplating solution is 25-35 ℃; the cathode current density is 15-25A/dm 2 (ii) a The PH value of the electroplating solution is 3-5; the area ratio of the cathode to the anode is 2: 3.
3. The use of a nano tungsten carbide-nickel composite coating as claimed in claims 1 and 2, characterized in that the coating is used as an anti-abrasion component material of hydraulic machinery and other component materials requiring corrosion resistance and wear resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710065860A CN100587123C (en) | 2007-05-11 | 2007-05-11 | Preparation method of nano tungsten carbide-nickel composite coat and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710065860A CN100587123C (en) | 2007-05-11 | 2007-05-11 | Preparation method of nano tungsten carbide-nickel composite coat and application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101122043A true CN101122043A (en) | 2008-02-13 |
| CN100587123C CN100587123C (en) | 2010-02-03 |
Family
ID=39084538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710065860A Expired - Fee Related CN100587123C (en) | 2007-05-11 | 2007-05-11 | Preparation method of nano tungsten carbide-nickel composite coat and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100587123C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102719862A (en) * | 2012-07-07 | 2012-10-10 | 西安科技大学 | Method for preparing Co-WC composite plating on surface of W18Cr4V steel |
| CN107034496A (en) * | 2017-06-26 | 2017-08-11 | 河海大学 | A kind of method for preparing Ni Co nano composite multiple layer alloys |
| CN107326406A (en) * | 2017-07-04 | 2017-11-07 | 苏州热工研究院有限公司 | A kind of protection of flow passage components narrow gap position erosion resistance layer, restorative procedure |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2575321Y (en) * | 2002-09-30 | 2003-09-24 | 王飚 | Isolated chemical material grouting pump |
| CN100336940C (en) * | 2005-02-24 | 2007-09-12 | 上海交通大学 | Composite electroforming preparing process for nano silicon carbide particle reinforced nickel base composite material |
-
2007
- 2007-05-11 CN CN200710065860A patent/CN100587123C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102719862A (en) * | 2012-07-07 | 2012-10-10 | 西安科技大学 | Method for preparing Co-WC composite plating on surface of W18Cr4V steel |
| CN102719862B (en) * | 2012-07-07 | 2015-04-01 | 西安科技大学 | Method for preparing Co-WC composite plating on surface of W18Cr4V steel |
| CN107034496A (en) * | 2017-06-26 | 2017-08-11 | 河海大学 | A kind of method for preparing Ni Co nano composite multiple layer alloys |
| CN107034496B (en) * | 2017-06-26 | 2019-04-26 | 河海大学 | A method of preparing Ni-Co nano composite multiple layer alloy |
| CN107326406A (en) * | 2017-07-04 | 2017-11-07 | 苏州热工研究院有限公司 | A kind of protection of flow passage components narrow gap position erosion resistance layer, restorative procedure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100587123C (en) | 2010-02-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Hovestad et al. | Electroplating of metal matrix composites by codeposition of suspended particles | |
| CN102534732B (en) | Pulse-electrodeposited Ni-Co-P/HBN composite plating and preparation method thereof | |
| CN109097812A (en) | The preparation method of deposit N i-Co/SiC nano-composite plate under a kind of three-electrode system | |
| CN105714360B (en) | Alkaline graphene nickel plating solution, its preparation method and application | |
| CN106929887A (en) | A kind of nickel graphene oxide composite plating solution and its preparation method and application | |
| CN102773434A (en) | Nanocomposite electroplating layer copper plate of continuous casting crystallizer and preparation process of nanocomposite electroplating layer copper plate | |
| CN108286064A (en) | A kind of pulse electrodeposition Ni-W/B4C nano composite deposite preparation method | |
| Yin et al. | Preparation and tribological properties of graphene oxide doped alumina composite coatings | |
| CN109735891A (en) | A method of for improving microparticle jetting electrodeposited composite coatings mechanical property | |
| CN110424043A (en) | A kind of modified graphene oxide/cobalt-based composite deposite and its preparation method and application | |
| Sheu et al. | Effects of alumina addition and heat treatment on the behavior of Cr coatings electroplated from a trivalent chromium bath | |
| CN100567587C (en) | Zn-Ni-Al 2O 3Nano-composite plate and preparation method thereof | |
| CN111607817A (en) | Alloy of iron group element and tungsten and silicon carbide composite coating as well as preparation method and application thereof | |
| CN113201780A (en) | Nickel-base super-hydrophobic nano CeO2Composite material of composite coating and preparation method thereof | |
| CN1769540A (en) | Nickel base nanometer polytetrafluoroethylene composite plate preparation method | |
| Zhou et al. | Tribological behavior of Ni–SiC composite coatings produced by circulating-solution electrodeposition technique | |
| CN105543912A (en) | Method for preparing compound surfactant/La-Ni-Mo-W codeposited coating on copper matrix | |
| Ma et al. | Performance of Ni–SiC composites deposited using magnetic-field-assisted electrodeposition under different magnetic-field directions | |
| CN108130570A (en) | A kind of compound trivalent plating chromium process | |
| CN101122043A (en) | Nano tungsten carbide-nickel composite coat and its preparation method and application | |
| CN101654803A (en) | Compound plating solution for obtaining nano compound plating layer with resistance to abrasion and high temperature oxidation, and plating method thereof | |
| CN105420775A (en) | Method for preparing La-Ni-Mo-W/GO composite deposit layer on carbon steel substrate | |
| CN115787012A (en) | Preparation method of low-stress self-lubricating high-tungsten Ni-W alloy coating | |
| CN109518238A (en) | The method that metal surface prepares super-hydrophobic nickel carbon SiClx composite deposite | |
| CN113755916B (en) | In-situ synthesis method of Ni-W-WC composite coating |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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 | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100203 Termination date: 20120511 |