CN111926351A - Composite plating process for ball valve - Google Patents
Composite plating process for ball valve Download PDFInfo
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- CN111926351A CN111926351A CN202010790857.3A CN202010790857A CN111926351A CN 111926351 A CN111926351 A CN 111926351A CN 202010790857 A CN202010790857 A CN 202010790857A CN 111926351 A CN111926351 A CN 111926351A
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- water
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- 238000007747 plating Methods 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000008569 process Effects 0.000 title claims abstract description 28
- 239000002131 composite material Substances 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 58
- 238000005406 washing Methods 0.000 claims abstract description 40
- OFNHPGDEEMZPFG-UHFFFAOYSA-N phosphanylidynenickel Chemical compound [P].[Ni] OFNHPGDEEMZPFG-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000009713 electroplating Methods 0.000 claims abstract description 21
- 238000001035 drying Methods 0.000 claims abstract description 20
- 238000002791 soaking Methods 0.000 claims abstract description 15
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000000126 substance Substances 0.000 claims abstract description 12
- 239000002253 acid Substances 0.000 claims abstract description 8
- 230000004913 activation Effects 0.000 claims abstract description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 6
- 239000010439 graphite Substances 0.000 claims abstract description 6
- 239000002113 nanodiamond Substances 0.000 claims description 33
- 239000000843 powder Substances 0.000 claims description 29
- 238000010438 heat treatment Methods 0.000 claims description 25
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 claims description 20
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 claims description 15
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 15
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 15
- 239000002904 solvent Substances 0.000 claims description 14
- JGHSBPIZNUXPLA-UHFFFAOYSA-N 2-hydroxyhexadecanoic acid Chemical group CCCCCCCCCCCCCCC(O)C(O)=O JGHSBPIZNUXPLA-UHFFFAOYSA-N 0.000 claims description 12
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 12
- 238000005554 pickling Methods 0.000 claims description 11
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 10
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 10
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 10
- 229910000027 potassium carbonate Inorganic materials 0.000 claims description 10
- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 claims description 9
- 230000004048 modification Effects 0.000 claims description 8
- 238000012986 modification Methods 0.000 claims description 8
- 239000003054 catalyst Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 6
- 229910052697 platinum Inorganic materials 0.000 claims description 6
- 239000003381 stabilizer Substances 0.000 claims description 6
- LTMRRSWNXVJMBA-UHFFFAOYSA-L 2,2-diethylpropanedioate Chemical compound CCC(CC)(C([O-])=O)C([O-])=O LTMRRSWNXVJMBA-UHFFFAOYSA-L 0.000 claims description 5
- SJECZPVISLOESU-UHFFFAOYSA-N 3-trimethoxysilylpropan-1-amine Chemical compound CO[Si](OC)(OC)CCCN SJECZPVISLOESU-UHFFFAOYSA-N 0.000 claims description 5
- KWSLGOVYXMQPPX-UHFFFAOYSA-N 5-[3-(trifluoromethyl)phenyl]-2h-tetrazole Chemical compound FC(F)(F)C1=CC=CC(C2=NNN=N2)=C1 KWSLGOVYXMQPPX-UHFFFAOYSA-N 0.000 claims description 5
- OSDWBNJEKMUWAV-UHFFFAOYSA-N Allyl chloride Chemical compound ClCC=C OSDWBNJEKMUWAV-UHFFFAOYSA-N 0.000 claims description 5
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical group OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 5
- IMQLKJBTEOYOSI-GPIVLXJGSA-N Inositol-hexakisphosphate Chemical compound OP(O)(=O)O[C@H]1[C@H](OP(O)(O)=O)[C@@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@@H]1OP(O)(O)=O IMQLKJBTEOYOSI-GPIVLXJGSA-N 0.000 claims description 5
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 5
- IMQLKJBTEOYOSI-UHFFFAOYSA-N Phytic acid Natural products OP(O)(=O)OC1C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C1OP(O)(O)=O IMQLKJBTEOYOSI-UHFFFAOYSA-N 0.000 claims description 5
- VMHLLURERBWHNL-UHFFFAOYSA-M Sodium acetate Chemical compound [Na+].CC([O-])=O VMHLLURERBWHNL-UHFFFAOYSA-M 0.000 claims description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 5
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 claims description 5
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 5
- 239000004327 boric acid Substances 0.000 claims description 5
- 239000004202 carbamide Substances 0.000 claims description 5
- GRWVQDDAKZFPFI-UHFFFAOYSA-H chromium(III) sulfate Chemical compound [Cr+3].[Cr+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRWVQDDAKZFPFI-UHFFFAOYSA-H 0.000 claims description 5
- 239000008139 complexing agent Substances 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 5
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 claims description 5
- 229910000363 nickel(II) sulfate Inorganic materials 0.000 claims description 5
- 229910017604 nitric acid Inorganic materials 0.000 claims description 5
- 239000012074 organic phase Substances 0.000 claims description 5
- 239000000467 phytic acid Substances 0.000 claims description 5
- 229940068041 phytic acid Drugs 0.000 claims description 5
- 235000002949 phytic acid Nutrition 0.000 claims description 5
- 238000010992 reflux Methods 0.000 claims description 5
- 239000001632 sodium acetate Substances 0.000 claims description 5
- 235000017281 sodium acetate Nutrition 0.000 claims description 5
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 5
- 239000001509 sodium citrate Substances 0.000 claims description 5
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical compound O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims description 5
- 229910001379 sodium hypophosphite Inorganic materials 0.000 claims description 5
- 239000001488 sodium phosphate Substances 0.000 claims description 5
- 229910000162 sodium phosphate Inorganic materials 0.000 claims description 5
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 5
- 235000011152 sodium sulphate Nutrition 0.000 claims description 5
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims description 5
- 239000001384 succinic acid Substances 0.000 claims description 4
- RCEAADKTGXTDOA-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCCCCCC[Na] Chemical compound OS(O)(=O)=O.CCCCCCCCCCCC[Na] RCEAADKTGXTDOA-UHFFFAOYSA-N 0.000 claims description 2
- 238000007738 vacuum evaporation Methods 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 abstract description 19
- 238000005260 corrosion Methods 0.000 abstract description 19
- 239000011248 coating agent Substances 0.000 abstract description 18
- 238000000576 coating method Methods 0.000 abstract description 18
- 238000005516 engineering process Methods 0.000 abstract description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 15
- 229910052804 chromium Inorganic materials 0.000 description 15
- 239000011651 chromium Substances 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 14
- 238000007605 air drying Methods 0.000 description 12
- 238000012360 testing method Methods 0.000 description 8
- 229910003460 diamond Inorganic materials 0.000 description 6
- 239000010432 diamond Substances 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 5
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 description 3
- 230000009471 action Effects 0.000 description 3
- 238000005054 agglomeration Methods 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000002715 modification method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 229910001096 P alloy Inorganic materials 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 159000000021 acetate salts Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005282 brightening Methods 0.000 description 1
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- JOPOVCBBYLSVDA-UHFFFAOYSA-N chromium(6+) Chemical compound [Cr+6] JOPOVCBBYLSVDA-UHFFFAOYSA-N 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- YOBAEOGBNPPUQV-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe].[Fe] YOBAEOGBNPPUQV-UHFFFAOYSA-N 0.000 description 1
- OCWMFVJKFWXKNZ-UHFFFAOYSA-L lead(2+);oxygen(2-);sulfate Chemical group [O-2].[O-2].[O-2].[Pb+2].[Pb+2].[Pb+2].[Pb+2].[O-]S([O-])(=O)=O OCWMFVJKFWXKNZ-UHFFFAOYSA-L 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000010959 steel Chemical group 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/04—Electroplating: Baths therefor from solutions of chromium
- C25D3/10—Electroplating: Baths therefor from solutions of chromium characterised by the organic bath constituents used
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/18—Pretreatment of the material to be coated
- C23C18/1803—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces
- C23C18/1824—Pretreatment of the material to be coated of metallic material surfaces or of a non-specific material surfaces by chemical pretreatment
- C23C18/1837—Multistep pretreatment
- C23C18/1844—Multistep pretreatment with use of organic or inorganic compounds other than metals, first
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/31—Coating with metals
- C23C18/32—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron
- C23C18/34—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron using reducing agents
- C23C18/36—Coating with nickel, cobalt or mixtures thereof with phosphorus or boron using reducing agents using hypophosphites
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Electrochemistry (AREA)
- Chemically Coating (AREA)
Abstract
The invention relates to the field of plating technology, and particularly discloses a composite plating process for a ball valve, which comprises the following steps: s1 oil removal: removing oil stains on the surface of the valve ball body; s2 acid washing: removing oxide skin on the surface of the valve ball body; s3 activation: soaking the valve ball in 8-10wt% sulfuric acid solution at 20-30 deg.C for 10-20s, soaking in water at 70-80 deg.C for 15-20min, and taking out; s4 chemical plating: immersing the valve ball body into a nickel-phosphorus plating solution at the temperature of 85-90 ℃ for 30-60min, taking out, washing with water, and drying; s5 electroplating: electroplating the valve ball with graphite as anode at 30-45 deg.C for 15-25min and current density of 20-40A/dm2And taking out, washing with water and drying. The coating has excellent corrosion resistance, wear resistance and high hardness, and is suitable for valve spheres.
Description
Technical Field
The invention relates to the field of plating technology, in particular to a composite plating process for a ball valve.
Background
The ball valve is widely applied to petrochemical industry, natural gas and urban heat supply systems, and due to the particularity of geological conditions, the ball valve forms a corrosion source (H) under the combined action of chemistry and electrochemistry2S、CO、CO2、NO2、NH4Etc.).
In order to improve the corrosion resistance of the sphere, the surface of the sphere needs to be plated with nickel. The chemical nickel-phosphorus plating alloy is used as a common plating process, is suitable for iron parts, steel parts and the like, and has no toxicity, environmental protection and good plating corrosion resistance. Because of the special crystalline structure of the chemical nickel-phosphorus plating alloy, the plated nickel-phosphorus alloy is in an amorphous structure, the crystal lattice gap of the plated layer is compact, and the chemical nickel-phosphorus plating alloy has good protection effect on a substrate and high medium corrosion resistance.
However, the existence of silica particles in the medium causes physical damage to the plating layer on the surface of the valve ball, which affects the corrosion resistance of the plating layer, and further reduces the service life of the valve ball. The hardness of the crystal phase structure of the coating is only 550HV, and the requirement of the coating on the physical wear performance cannot be well met.
Therefore, the most conventional method is to heat treat the plated spheres, and the plated layer is converted from an amorphous structure to a crystalline structure by high-temperature treatment, so as to improve the microhardness of the plated layer. However, the heat treatment will cause the corrosion resistance of the plating layer to decrease, and thus needs to be improved.
Disclosure of Invention
Aiming at the problem that the corrosion resistance and the hardness of a plating layer in the prior art cannot meet the requirements at the same time, the invention aims to provide a composite plating process for a ball valve, which has the advantages of excellent corrosion resistance and high hardness of the plating layer.
In order to achieve the purpose, the invention provides the following technical scheme:
a composite plating process for a ball valve comprises the following steps:
s1 oil removal: removing oil stains on the surface of the valve ball body;
s2 acid washing: removing oxide skin on the surface of the valve ball body;
s3 activation: soaking the valve ball in 8-10wt% sulfuric acid solution at 20-30 deg.C for 10-20s, soaking in water at 70-80 deg.C for 15-20min, and taking out;
s4 chemical plating: immersing the valve ball body into a nickel-phosphorus plating solution at the temperature of 85-90 ℃ for 30-60min, taking out, washing with water, and drying;
s5 electroplating: electroplating the valve ball with graphite as anode at 30-45 deg.C for 15-25min and current density of 20-40A/dm2Taking out, washing with water, and drying, wherein the electroplating solution comprises 30-50g/L chromium sulfate, 80-100g/L aluminum sulfate, 50-100g/L sodium sulfate, 50-60g/L boric acid, 20-30g/L complexing agent, 20-40ml/L stabilizer, and 5-1 g/L complexing agent0ml/L brightener, 10-20g/L nano diamond powder and 10-20mg/L lauryl sodium sulfate.
By adopting the technical scheme, the valve ball is subjected to S1 oil removal, S2 acid washing and S3 activation in sequence, the surface of the matrix is clean and has catalytic activity; after S4 chemical plating, plating a nickel-phosphorus plating layer on the surface of the valve ball; and electroplating at S5 to obtain a hard chromium layer on the surface of the nickel-phosphorus layer.
The nickel-phosphorus plating layer has excellent corrosion resistance, the hard chromium plating layer has high hardness and excellent wear resistance, and the nickel-phosphorus plating layer and the hard chromium plating layer play a complementary role, so that the plating layer meets the requirements of chemical corrosion resistance and mechanical wear without heat treatment. Diamond particles are deposited in the hard chromium coating, so that the hardness and the wear resistance of the coating are further improved. Compared with a hexavalent chromium electroplating mode, the trivalent chromium electroplating mode has the advantages of small harmfulness, less pollution and simple wastewater treatment.
Further, the nano diamond powder is modified, and the modification process is as follows:
firstly, mixing 10-15 parts by weight of diethyl malonate, 7-10 parts by weight of allyl chloride, 12-15 parts by weight of potassium carbonate and 120 parts by weight of acetonitrile, heating to 75-80 ℃, refluxing and stirring for 12-20h, cooling to room temperature, adding water to remove redundant potassium carbonate, extracting with ethyl acetate, washing an organic phase for 2-3 times, drying with anhydrous sodium sulfate, and removing a solvent by vacuum evaporation to obtain a pre-product;
secondly, mixing 6-8 parts of the pre-product and 0.05-0.08 part of platinum catalyst, stirring and heating to 80-85 ℃, adding 3-4 parts of aminopropyltrimethoxysilane, reacting for 1-2 hours, then adding 0.4-0.6 part of phytic acid, continuing heating to 90-95 ℃, reacting for 2-3 hours, and then adding 20-30 parts of water to obtain a modified solution;
and thirdly, immersing 2-3 parts of nano-diamond powder into 8-12 parts of the modification solution, heating to 60-70 ℃, continuously stirring for 6-8h, and finally filtering, washing and drying to obtain the modified nano-diamond powder.
By adopting the technical scheme, a large number of functional groups containing oxygen, nitrogen and the like are adsorbed on the surfaces of the nano-diamond grains, and the nano-diamond grains are formed into an agglomeration state under the unsaturated bonding action among partial grains, so that the agglomeration phenomenon is easy to occur. After the nano diamond powder is modified, the agglomeration phenomenon is reduced, the nano diamond powder can be uniformly distributed in the coating, and the action effect is better. Meanwhile, a large number of chelating groups are formed on the surface of the diamond, and the bonding performance of the diamond and the chromium coating is enhanced, so that the diamond is not easy to fall off, and the wear resistance of the coating is further improved.
Further, the stabilizer is 2-hydroxyhexadecanoic acid.
By adopting the technical scheme, on one hand, the stabilizing effect is achieved, and on the other hand, the improvement of the bonding performance of the nano diamond and the chromium plating layer is facilitated.
Further, the brightening agent comprises 6-10wt% of OP-10, 3-5wt% of a diffusant NNF and the balance of water.
By adopting the technical scheme, on one hand, the plating layer is clean and has high glossiness, and on the other hand, the bonding performance of the nano diamond and the chromium plating layer is improved.
Further, the complexing agent is EDTA.
By adopting the technical scheme, the complexing agent can prevent the plating solution from precipitating, increase the stability of the plating solution and prolong the service life.
Further, the nickel-phosphorus plating solution comprises 25-35g/L of nickel sulfate, 25-35g/L of sodium hypophosphite, 5-10g/L of sodium citrate, 10-20g/L of sodium acetate and 3-5g/L of succinic acid.
By adopting the technical scheme, the nickel-phosphorus coating has good corrosion resistance.
Further, the specific process of S1 degreasing is as follows: immersing the valve ball in deoiling liquid at 80-90 deg.C for 10-20min, taking out, washing with water, and drying.
Further, the deoiling liquid comprises 25-30g/L of sodium carbonate, 25-35g/L of sodium hydroxide, 6-15g/L of sodium phosphate and 2-5 g/LOP-10.
By adopting the technical scheme, grease or dirt such as lubricant, antirust oil, polishing paste and the like remained on the surface of the valve ball body is removed, so that the surface of the valve ball body reaches a complete wetting state, a uniform water film can be formed, and the phenomenon of bead hanging is avoided.
Further, the specific process of the S2 pickling is as follows: soaking the valve ball in pickling solution at 30-40 deg.C for 15-30min, taking out, washing with water, and drying.
Further, the pickling solution comprises 15-20wt% of nitric acid, 3-5wt% of hydrofluoric acid, 2-4wt% of urea and the balance of water.
By adopting the technical scheme, an oxide film, an oxide skin and a corrosion product on the surface of the valve ball body are removed.
In conclusion, the invention has the following beneficial effects:
1. the invention adopts a composite process of chemical nickel-phosphorus plating and chromium plating, combines the corrosion resistance of a nickel-phosphorus plating layer and the wear resistance of a chromium plating layer to obtain a plating layer with excellent performance, and is suitable for ball valves;
2. the nano diamond powder in the electroplating solution is modified and is not easy to agglomerate, so that the chromium plating layer has high hardness and good wear resistance.
Drawings
FIG. 1 is a flow chart of a method provided by the present invention.
Detailed Description
The invention is described in further detail below with reference to the following figures and examples, in which: the following examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer, and the starting materials used in the following examples are available from ordinary commercial sources unless otherwise specified.
The embodiment of the invention adopts the following raw materials:
the nano diamond powder has a particle size of 15nm and is purchased from Reliter science and technology Co., Ltd of Beijing country; diffuser NNF was purchased from jining jiacheng new materials ltd; platinum catalyst grade 218, purchased from sienna keli new materials gmbh.
Example 1:
a composite plating process for a ball valve, as shown in FIG. 1, comprises the following steps:
s1 oil removal: immersing the valve ball body into deoiling liquid at the temperature of 80 ℃ for 20min, taking out, washing with water, and air-drying, wherein the deoiling liquid comprises 25g/L sodium carbonate, 25g/L sodium hydroxide, 6g/L sodium phosphate, 2g/LOP-10 and water as a solvent;
s2 acid washing: immersing the valve ball deoiled by S1 in a pickling solution, soaking at 30 ℃ for 30min, taking out, washing with water, and air-drying, wherein the pickling solution comprises 15wt% of nitric acid, 3wt% of hydrofluoric acid, 2wt% of urea and the balance of water;
s3 activation: soaking the valve ball pickled by S2 in 8wt% sulfuric acid solution at 30 ℃ for 10S, placing the valve ball in water at 70 ℃ for 20min, and taking out;
s4 chemical plating: immersing the valve ball activated by S3 in a nickel-phosphorus plating solution, washing and air-drying after taking out the valve ball at 90 ℃ for 30min, wherein the nickel-phosphorus plating solution comprises 25g/L nickel sulfate, 25g/L sodium hypophosphite, 5g/L sodium citrate, 10g/L sodium acetate, 3g/L succinic acid and water as a solvent;
s5 electroplating: electroplating the valve ball chemically plated by S4, taking out graphite as an anode, washing with water and air-drying at 45 ℃ for 15min and at a current density of 40A/dm2, wherein the electroplating solution comprises 30g/L of chromium sulfate, 80g/L of aluminum sulfate, 50g/L of sodium sulfate, 50g/L of boric acid, 20g/L of EDTA, 20ml/L of 2-hydroxyhexadecanoic acid, 5ml/L of brightener, 10g/L of modified nano diamond powder, 10mg/L of sodium dodecyl sulfate and water as a solvent.
The brightener comprises 6wt% of OP-10, 3wt% of a diffusant NNF and the balance of water.
The preparation process of the modified nano diamond powder comprises the following steps:
firstly, mixing 10 parts by weight of diethyl malonate, 7 parts by weight of allyl chloride, 12 parts by weight of potassium carbonate and 100 parts by weight of acetonitrile uniformly, heating to 75 ℃, refluxing and stirring for 20 hours, cooling to room temperature, adding water to remove redundant potassium carbonate, extracting with ethyl acetate, washing an organic phase with water for 2 times, drying with anhydrous sodium sulfate, and evaporating in vacuum to remove a solvent to obtain a pre-product;
secondly, mixing 6 parts of the pre-product and 0.05 part of platinum catalyst, stirring and heating to 80 ℃, adding 3 parts of aminopropyl trimethoxy silane, reacting for 1 hour, adding 0.4 part of phytic acid, continuing heating to 90 ℃, reacting for 3 hours, and then adding 20 parts of water to obtain a modified solution;
and thirdly, soaking 2 parts of nano-diamond powder into 8 parts of the modification solution, heating to 70 ℃, continuously stirring for 6 hours, and finally filtering, washing and drying to obtain the modified nano-diamond powder.
Example 2:
a composite plating process for a ball valve, as shown in FIG. 1, comprises the following steps:
s1 oil removal: immersing the valve ball body into deoiling liquid at 90 ℃ for 10min, taking out, washing with water, and air-drying, wherein the deoiling liquid comprises 30g/L sodium carbonate, 35g/L sodium hydroxide, 15g/L sodium phosphate, 5g/LOP-10 and water as a solvent;
s2 acid washing: immersing the valve ball deoiled by S1 in a pickling solution, soaking at 40 ℃ for 15min, taking out, washing with water, and air-drying, wherein the pickling solution comprises 20wt% of nitric acid, 5wt% of hydrofluoric acid, 4wt% of urea and the balance of water;
s3 activation: soaking the valve ball pickled by S2 in 10wt% sulfuric acid solution at 20 ℃ for 20S, placing the valve ball in water at 80 ℃ for 15min, and taking out;
s4 chemical plating: immersing the valve ball activated by S3 in a nickel-phosphorus plating solution, at 85 ℃ for 60min, taking out, washing with water, and air-drying, wherein the nickel-phosphorus plating solution comprises 35g/L nickel sulfate, 35g/L sodium hypophosphite, 10g/L sodium citrate, 20g/L sodium acetate, 5g/L succinic acid, and a solvent which is water;
s5 electroplating: electroplating the valve ball chemically plated by S4, taking out graphite as an anode, washing with water and air-drying at 30 ℃ for 25min and at a current density of 20A/dm2, wherein the electroplating solution comprises 50g/L of chromium sulfate, 100g/L of aluminum sulfate, 100g/L of sodium sulfate, 60g/L of boric acid, 30g/L of EDTA, 40ml/L of 2-hydroxyhexadecanoic acid, 10ml/L of brightener, 20g/L of modified nano diamond powder, 20mg/L of sodium dodecyl sulfate and water as a solvent.
The brightener comprises 10wt% of OP-10, 5wt% of a diffusant NNF and the balance of water.
The preparation process of the modified nano diamond powder comprises the following steps:
firstly, mixing 15 parts of diethyl malonate, 10 parts of allyl chloride, 15 parts of potassium carbonate and 120 parts of acetonitrile uniformly by weight, heating to 80 ℃, refluxing and stirring for 12 hours, cooling to room temperature, adding water to remove redundant potassium carbonate, extracting with ethyl acetate, washing an organic phase for 3 times, drying with anhydrous sodium sulfate, and evaporating in vacuum to remove a solvent to obtain a pre-product;
step two, mixing 8 parts of the pre-product and 0.08 part of platinum catalyst, stirring and heating to 85 ℃, adding 4 parts of aminopropyl trimethoxy silane, reacting for 2 hours, adding 0.6 part of phytic acid, continuing heating to 95 ℃, reacting for 2 hours, and then adding 30 parts of water to obtain a modified solution;
and thirdly, immersing 3 parts of nano-diamond powder into 12 parts of the modification solution, heating to 60 ℃, continuously stirring for 8 hours, and finally filtering, washing and drying to obtain the modified nano-diamond powder.
Example 3:
a composite plating process for a ball valve, as shown in FIG. 1, comprises the following steps:
s1 oil removal: immersing the valve ball body into deoiling liquid at the temperature of 85 ℃ for 15min, taking out, washing with water, and air-drying, wherein the deoiling liquid comprises 28g/L sodium carbonate, 30g/L sodium hydroxide, 10g/L sodium phosphate, 3g/LOP-10 and water as a solvent;
s2 acid washing: immersing the valve ball deoiled by S1 in a pickling solution, soaking at 35 ℃ for 18min, taking out, washing with water, and air-drying, wherein the pickling solution comprises 18wt% of nitric acid, 4wt% of hydrofluoric acid, 3wt% of urea and the balance of water;
s3 activation: soaking the valve ball pickled by S2 in 9wt% sulfuric acid solution at 25 ℃ for 15S, placing the valve ball in water at 75 ℃ for 18min, and taking out;
s4 chemical plating: immersing the valve ball activated by S3 in a nickel-phosphorus plating solution, washing and air-drying after taking out the valve ball at 88 ℃ for 45min, wherein the nickel-phosphorus plating solution comprises 30g/L nickel sulfate, 30g/L sodium hypophosphite, 8g/L sodium citrate, 15g/L sodium acetate, 4g/L succinic acid and water as a solvent;
s5 electroplating: electroplating the valve ball chemically plated by S4, taking out graphite as an anode, washing with water and air-drying at 40 ℃ for 20min and at a current density of 30A/dm2, wherein the electroplating solution comprises 40g/L of chromium sulfate, 90g/L of aluminum sulfate, 80g/L of sodium sulfate, 55g/L of boric acid, 25g/L of EDTA, 30ml/L of 2-hydroxyhexadecanoic acid, 8ml/L of brightener, 15g/L of modified nano diamond powder, 15mg/L of sodium dodecyl sulfate and water as a solvent.
The brightener comprises 8wt% of OP-10, 4wt% of a diffusant NNF and the balance of water.
The preparation process of the modified nano diamond powder comprises the following steps:
firstly, uniformly mixing 12 parts of diethyl malonate, 9 parts of allyl chloride, 14 parts of potassium carbonate and 110 parts of acetonitrile by weight, heating to 78 ℃, refluxing and stirring for 16 hours, cooling to room temperature, adding water to remove redundant potassium carbonate, extracting with ethyl acetate, washing an organic phase with water for 2 times, drying with anhydrous sodium sulfate, and evaporating in vacuum to remove a solvent to obtain a pre-product;
secondly, mixing 7 parts of the pre-product and 0.06 part of platinum catalyst, stirring and heating to 82 ℃, adding 3.5 parts of aminopropyl trimethoxy silane, reacting for 1.5h, then adding 0.5 part of phytic acid, continuously heating to 92 ℃, reacting for 2.5h, and then adding 25 parts of water to obtain a modified solution;
and thirdly, immersing 2.5 parts of nano-diamond powder into 10 parts of the modification solution, heating to 65 ℃, continuously stirring for 7 hours, and finally filtering, washing and drying to obtain the modified nano-diamond powder.
Example 4:
the difference from example 3 is that the diffusing agent NNF in the brightener was replaced by the diffusing agent NNO.
Example 5:
the difference from example 3 is that 2-hydroxyhexadecanoic acid was replaced with tribasic lead sulfate.
Example 6:
the difference from example 3 is that the nanodiamond powder was not modified.
Example 7:
the difference from example 3 is that the modifying solution is 10wt% KH 570.
Comparative example 1:
the difference from example 3 is that the plating of S5 was not performed.
Comparative example 2:
the difference from example 3 is that the plating at S5 was changed to the heat treatment at S5. The specific process of the S5 heat treatment is as follows: and (3) placing the valve ball in a box type electric heating furnace, heating to 300 ℃, treating for 2h, and cooling to room temperature.
Comparative example 3:
the difference from example 3 is that the plating solution does not include a brightener.
Comparative example 4:
the difference from example 3 is that the plating solution does not include a stabilizer.
Comparative example 5:
the difference from example 3 is that the plating solution does not include modified nanodiamond powder.
And (3) performance testing:
the nickel-phosphorus plating layers of examples 1 to 3 had a thickness of 60 μm and the chromium plating layer had a thickness of 20 μm.
The plating layers of examples 1 to 7 and comparative examples 1 to 5 were subjected to hardness test, corrosion resistance test and wear resistance test. The corrosion resistance test refers to a copper accelerated acetate salt spray test recorded in GB/T10125-. The abrasion resistance test is carried out according to a Taber abrasion test method, a CS-10 abrasion machine is adopted, 1000 g/wheel is loaded, the time is 10000 r, and the abrasion loss is recorded. The results of the above tests are shown in Table 1.
TABLE 1 coating performance test results recording table
| Hardness (HV) | Corrosion resistance (h) | Abrasion resistance (mg) | |
| Example 1 | 1100 | 168 | 3.2 |
| Example 2 | 1100 | 168 | 3.1 |
| Example 3 | 1100 | 168 | 2.9 |
| Example 4 | 1100 | 168 | 3.8 |
| Example 5 | 1100 | 168 | 3.7 |
| Example 6 | 1050 | 168 | 7.5 |
| Example 7 | 1100 | 168 | 7.1 |
| Comparative example 1 | 550 | 96 | 158.3 |
| Comparative example 2 | 900 | 72 | 88.9 |
| Comparative example 3 | 1100 | 168 | 3.8 |
| Comparative example 4 | 1100 | 168 | 3.8 |
| Comparative example 5 | 1000 | 168 | 8.6 |
As can be seen from table 1:
comparing the wear resistance results of the embodiments 3, 4 and 5 and the comparative examples 3 and 4, the brightener and the stabilizer specially selected by the invention are helpful for the combination of diamond and a chromium coating, and are further helpful for improving the wear resistance of the coating;
the wear resistance results of the embodiments 3 and 6 and the comparative example 5 are compared, so that the nano diamond powder modified by the nano diamond powder has good bonding performance with the chromium coating, the performance of diamond can be fully exerted, and the wear resistance and hardness of the coating are improved;
thirdly, the wear resistance results of the examples 3 and 7 are compared, and the nano diamond powder modification method is superior to the common silane coupling agent modification method;
EXAMPLE 3 the results of corrosion resistance and hardness of comparative examples 1 and 2 are compared, and the coating structure is compounded by adopting a nickel-phosphorus coating and a chromium coating, so that the hardness and corrosion resistance of the coating can be effectively improved, and the application requirements of the goal valve body can be met.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (10)
1. A composite plating process for a ball valve is characterized by comprising the following steps:
s1 oil removal: removing oil stains on the surface of the valve ball body;
s2 acid washing: removing oxide skin on the surface of the valve ball body;
s3 activation: soaking the valve ball in 8-10wt% sulfuric acid solution at 20-30 deg.C for 10-20s, soaking in water at 70-80 deg.C for 15-20min, and taking out;
s4 chemical plating: immersing the valve ball body into a nickel-phosphorus plating solution at the temperature of 85-90 ℃ for 30-60min, taking out, washing with water, and drying;
s5 electroplating: electroplating the valve ball with graphite as anode at 30-45 deg.C for 15-25min and current density of 20-40A/dm2Taking out, washing with water, and drying, wherein the electroplating solution comprises 30-50g/L chromium sulfate, 80-100g/L aluminum sulfate, 50-100g/L sodium sulfate, 50-60g/L boric acid, 20-30g/L complexing agent, 20-40ml/L stabilizer, 5-10ml/L brightener, 10-20g/L nano diamond powder and 10-20mg/L lauryl sodium sulfate.
2. The composite plating process for a ball valve according to claim 1, wherein: the nano diamond powder is modified, and the modification process is as follows:
firstly, mixing 10-15 parts by weight of diethyl malonate, 7-10 parts by weight of allyl chloride, 12-15 parts by weight of potassium carbonate and 120 parts by weight of acetonitrile, heating to 75-80 ℃, refluxing and stirring for 12-20h, cooling to room temperature, adding water to remove redundant potassium carbonate, extracting with ethyl acetate, washing an organic phase for 2-3 times, drying with anhydrous sodium sulfate, and removing a solvent by vacuum evaporation to obtain a pre-product;
secondly, mixing 6-8 parts of the pre-product and 0.05-0.08 part of platinum catalyst, stirring and heating to 80-85 ℃, adding 3-4 parts of aminopropyltrimethoxysilane, reacting for 1-2 hours, then adding 0.4-0.6 part of phytic acid, continuing heating to 90-95 ℃, reacting for 2-3 hours, and then adding 20-30 parts of water to obtain a modified solution;
and thirdly, immersing 2-3 parts of nano-diamond powder into 8-12 parts of the modification solution, heating to 60-70 ℃, continuously stirring for 6-8h, and finally filtering, washing and drying to obtain the modified nano-diamond powder.
3. The composite plating process for a ball valve according to claim 2, wherein: the stabilizer is 2-hydroxyhexadecanoic acid.
4. The composite plating process for a ball valve according to claim 2, wherein: the brightener comprises 6-10wt% of OP-10, 3-5wt% of a diffusant NNF and the balance of water.
5. The composite plating process for a ball valve according to claim 1, wherein: the complexing agent is EDTA.
6. The composite plating process for a ball valve according to claim 1, wherein: the nickel-phosphorus plating solution comprises 25-35g/L nickel sulfate, 25-35g/L sodium hypophosphite, 5-10g/L sodium citrate, 10-20g/L sodium acetate and 3-5g/L succinic acid.
7. The composite plating process for a ball valve according to claim 1, wherein: the specific process of S1 deoiling is as follows: immersing the valve ball in deoiling liquid at 80-90 deg.C for 10-20min, taking out, washing with water, and drying.
8. The composite plating process for a ball valve according to claim 7, wherein: the deoiling liquid comprises 25-30g/L of sodium carbonate, 25-35g/L of sodium hydroxide, 6-15g/L of sodium phosphate and 2-5 g/LOP-10.
9. The composite plating process for a ball valve according to claim 1, wherein: the specific process of S2 acid washing is as follows: soaking the valve ball in pickling solution at 30-40 deg.C for 15-30min, taking out, washing with water, and drying.
10. A composite plating process for a ball valve according to claim 9, wherein: the pickling solution comprises 15-20wt% of nitric acid, 3-5wt% of hydrofluoric acid, 2-4wt% of urea and the balance of water.
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