CN102676971A - Preparation method for composite coating of outer surface of nodular cast iron pipe - Google Patents
Preparation method for composite coating of outer surface of nodular cast iron pipe Download PDFInfo
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- CN102676971A CN102676971A CN2012101477841A CN201210147784A CN102676971A CN 102676971 A CN102676971 A CN 102676971A CN 2012101477841 A CN2012101477841 A CN 2012101477841A CN 201210147784 A CN201210147784 A CN 201210147784A CN 102676971 A CN102676971 A CN 102676971A
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- ceramic coating
- cast iron
- coating
- raw material
- tube outer
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Links
- 238000000576 coating method Methods 0.000 title claims abstract description 36
- 229910001141 Ductile iron Inorganic materials 0.000 title claims abstract description 35
- 239000011248 coating agent Substances 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000002131 composite material Substances 0.000 title abstract 2
- 238000005524 ceramic coating Methods 0.000 claims abstract description 65
- 239000002994 raw material Substances 0.000 claims abstract description 28
- 239000000843 powder Substances 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 11
- 238000005507 spraying Methods 0.000 claims abstract description 10
- 238000007747 plating Methods 0.000 claims description 14
- 150000001875 compounds Chemical class 0.000 claims description 11
- 239000000919 ceramic Substances 0.000 claims description 9
- 229910010413 TiO 2 Inorganic materials 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 239000000203 mixture Substances 0.000 claims description 7
- 238000002203 pretreatment Methods 0.000 claims description 6
- 239000011247 coating layer Substances 0.000 claims description 2
- 239000003973 paint Substances 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 18
- 230000007797 corrosion Effects 0.000 abstract description 18
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000007769 metal material Substances 0.000 abstract description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract 2
- QDOXWKRWXJOMAK-UHFFFAOYSA-N dichromium trioxide Chemical compound O=[Cr]O[Cr]=O QDOXWKRWXJOMAK-UHFFFAOYSA-N 0.000 abstract 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 238000010285 flame spraying Methods 0.000 abstract 1
- 230000005764 inhibitory process Effects 0.000 abstract 1
- 239000000758 substrate Substances 0.000 abstract 1
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 1
- 239000011701 zinc Substances 0.000 description 9
- 229910000905 alloy phase Inorganic materials 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 229910000635 Spelter Inorganic materials 0.000 description 5
- 229910001018 Cast iron Inorganic materials 0.000 description 4
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 4
- 230000002421 anti-septic effect Effects 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- -1 descaling Substances 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 239000003822 epoxy resin Substances 0.000 description 4
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 229920000647 polyepoxide Polymers 0.000 description 4
- 238000004381 surface treatment Methods 0.000 description 4
- 238000007749 high velocity oxygen fuel spraying Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920003987 resole Polymers 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000000181 anti-adherent effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000010286 high velocity air fuel Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011224 oxide ceramic Substances 0.000 description 1
- 229910052574 oxide ceramic Inorganic materials 0.000 description 1
- UOURRHZRLGCVDA-UHFFFAOYSA-D pentazinc;dicarbonate;hexahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Zn+2].[Zn+2].[Zn+2].[Zn+2].[Zn+2].[O-]C([O-])=O.[O-]C([O-])=O UOURRHZRLGCVDA-UHFFFAOYSA-D 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
- UGZADUVQMDAIAO-UHFFFAOYSA-L zinc hydroxide Chemical compound [OH-].[OH-].[Zn+2] UGZADUVQMDAIAO-UHFFFAOYSA-L 0.000 description 1
- 229940007718 zinc hydroxide Drugs 0.000 description 1
- 229910021511 zinc hydroxide Inorganic materials 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Landscapes
- Coating By Spraying Or Casting (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Abstract
The invention discloses a preparation method for a composite coating of an outer surface of a nodular cast iron pipe, belonging to the technical field of corrosion inhibition of a metal material. The preparation method comprises the following steps of: (1) pretreating the outer surface of the nodular cast iron pipe; (2) the spray coating of a ceramic coating: uniformly mixing a ceramic coating raw material, and spraying the ceramic coating raw material on the outer surface of the nodular cast iron pipe by adopting flame spraying equipment, wherein the weight of the ceramic coating on the outer surface of the nodular cast iron pipe is 80-300g/m<2>, the diameter of the powder of the mixing ceramic coating raw material is 5-60 microns; the mixing ceramic coating raw material comprises Al2O3, TiO2 and Cr2O3; and (3) coating a hole sealing finishing coat. As the ceramic coating prepared by the invention has low porosity, the ceramic coating has better corrosion resistance performance; the ceramic coating has stronger binding capacity with a substrate and good wear resistance performance, can be suitable for severe environments and is low in manufacturing cost; and the hole sealing finishing coat can further increase the corrosion resistance performance of the ceramic coating.
Description
Technical field
The invention belongs to metallic material corrosion and suppress technical field.
Background technology
It is spelter coating the most widely that the hot spray coating of metal current pipeline is used, though spelter coating has better dynamic electro-chemical protection performance, spelter coating has the following shortcoming:
One of which, the porosity of Zn coating is higher, weakens its antiseptic property;
They are two years old; In conventional atmospheric environment, Zn coating corrosion product mainly is made up of the zinc oxide that is insoluble in water, alkali formula zinc hydroxide and subcarbonate, and this type of corrosion product has certain self-enclosed ability and intercepts the intrusion of corrosive mediums such as moisture; But in the higher environment of chloride ion content; Loosened, be easy to dissolved villaumite compound rapidly and replace because the intrusion of cl ions, Zn coatingsurface are insoluble in the corrosion products such as carbonate of water, corrosion product also can cause coating foaming simultaneously; Lower adhesive force of coatings, cause coating that spot corrosion, non-uniform corrosion take place easily and shorten its anticorrosion life-span.
Its three, Zn coating and metallic matrix bonding force are relatively poor, damaged peeling phenomenon appears in the back of on the production line track, rolling easily;
Its four, the Zn coating hardness is lower, its hardness is about HRC about 20, wearing and tearing appear in the easy deformation slippage when receiving the bump of various external force, impact and friction, reduce its protective capacities greatly.
Though the Zn coating has above-mentioned shortcoming, in general applied environment, spelter coating satisfies request for utilization and forms and be first-selected coating, and in the environment of some inclement conditions, spelter coating just can not satisfy its request for utilization.Such as the pipeline of in the Desertification environment, installing,, require the pipeline top coating to have good wear resistance and corrosion resistance transporting, depositing and install and use of the impact of process midium or long term through wind-engaging sand.
Summary of the invention
The technical problem that the present invention will solve provides a kind of preparation method of spheroidal graphite cast iron tube outer surface compound coating, and the ceramic coating porosity of the present invention's preparation is low, so antiseptic property is better; Ceramic coating and matrix bond ability are stronger, and wear resistance can be applicable to severe environment well, and cost of manufacture is low; The sealing of hole finish(ing) coat can further improve the Corrosion Protection of ceramic coating.
The technical scheme that the present invention taked is: a kind of preparation method of spheroidal graphite cast iron tube outer surface compound coating may further comprise the steps:
(1) spheroidal graphite cast iron tube outer surface pre-treatment;
(2) spraying ceramic coat: the ceramic coating raw materials mix is even, adopt flame plating equipment that the ceramic coating raw material is sprayed at the spheroidal graphite cast iron tube outer surface, the ceramic coating weight on the spheroidal graphite cast iron tube outer surface is 80～300g/m
2, ceramic coating raw material powder diameter is 5～60 microns; The ceramic coating raw material is made up of following material by mass percentage: Al
2O
330～70%, TiO
21～20%, surplus is Cr
2O
3
(3) apply the sealing of hole finish(ing) coat
Promptly apply organic or inorganic paint at the ceramic coating outside surface, thickness of coating layer is 70～150 microns.
Ceramic coating weight on the preferred spheroidal graphite cast iron tube outer surface is 180g/m
2
Flame plating comprises general flame plating, HVOF and HVAF.
Adopt flame spray powder coating equipment, oxide ceramic powder is heated remelting, be sprayed at pipe surface, form the wear-resistant ceramic protective coating, have Al in the weave construction of its coating
2O
3Alloy phase, Cr
2O
3Alloy phase and a small amount of TiO
2Alloy phase, Al
2O
3Alloy phase and Cr
2O
3Alloy phase alternately exists, the collaborative Al that brought into play
2O
3The anti-adhesive wear performance and the Cr of alloy phase
2O
3The abrasive wear resistance performance of alloy phase, the TiO in the coating
2The alloy phase compact structure can stop up the hole in the ceramic coating, reduces the porosity of ceramic coating, has strengthened the self-enclosed effect of coating, makes coating improve greatly in the corrosion resisting property in corrosion later stage.
Adopt the beneficial effect that technique scheme produced to be:
The ceramic coating porosity of the present invention's preparation is low, so antiseptic property is better; Ceramic coating and matrix bond ability are stronger, and wear resistance can be applicable to severe environment well, and cost of manufacture is low; The sealing of hole finish(ing) coat can further improve the Corrosion Protection of ceramic coating.
1. Al
2O
3And Cr
2O
3The alloy powder wide material sources, price is lower, and producer is easy to prepare the powder that satisfies composition and granularity requirements as requested, is used for the spraying abrasion-proof ceramic coating, so the abrasion-proof ceramic coat economic and practical is good and easy to implement.
2. the ceramic coating wear and corrosion behavior is good, suitable being applied in the erosion corrosion environment such as Desertification, and the abrasion-proof ceramic coat hardness that is sprayed is 3 times of pure Zn coating approximately, its wear resistance and corrosion resistance obviously is superior to pure Zn coating and ZnAl alloy coat, long service life; Ceramic coating porosity of the present invention is lower than pure Zn coating.
3, spheroidal graphite cast iron tube outer surface compound coating of the present invention also comprises the sealing of hole finish(ing) coat, can prevent the influence of ceramic coating internal void to the ceramic coating antiseptic property.
Embodiment
Embodiment 1
A kind of preparation method of spheroidal graphite cast iron tube outer surface compound coating may further comprise the steps:
(1) spheroidal graphite cast iron tube outer surface pre-treatment: to cast-iron pipe and pipe fitting surface treatment, remove impurity such as descaling, oil, water, dust before the thermospray.
(2) spraying ceramic coat: the ceramic coating raw materials mix is even; Adopt supersonic velocity flame plating equipment that the ceramic coating raw material is sprayed at the spheroidal graphite cast iron tube outer surface, supersonic velocity flame plating equipment comprises flame plating rifle, powder feeder, air compressor machine, oxygen and acetylene gas pipeline system etc.;
Ceramic coating weight on the spheroidal graphite cast iron tube outer surface is 180g/m
2, ceramic coating raw material powder diameter is 5 microns; The ceramic coating raw material is made up of following material by mass percentage: Al
2O
330%, TiO
220%, Cr
2O
350%.
Hardness value >=the HRC 67 of ceramic coating.
(3) apply the sealing of hole finish(ing) coat
Apply epoxy resin at the ceramic coating outside surface, the thickness of epoxy resin layer is 70 microns.
Embodiment 2
A kind of preparation method of spheroidal graphite cast iron tube outer surface compound coating may further comprise the steps:
(1) spheroidal graphite cast iron tube outer surface pre-treatment: to cast-iron pipe and pipe fitting surface treatment, remove impurity such as descaling, oil, water, dust before the thermospray.
(2) spraying ceramic coat: the ceramic coating raw materials mix is even; Adopt flame plating equipment that the ceramic coating raw material is sprayed at the spheroidal graphite cast iron tube outer surface, flame plating equipment comprises flame plating rifle, powder feeder, air compressor machine, oxygen and acetylene gas pipeline system etc.;
Ceramic coating weight on the spheroidal graphite cast iron tube outer surface is 80g/m
2, ceramic coating raw material powder diameter is 60 microns; The ceramic coating raw material is made up of following material by mass percentage: Al
2O
370%, TiO
210%, Cr
2O
320%.
Hardness value >=the HRC 65 of ceramic coating.
(3) apply the sealing of hole finish(ing) coat
Apply resol at the ceramic coating outside surface, the thickness of resol layer is 150 microns.
Embodiment 3
A kind of preparation method of spheroidal graphite cast iron tube outer surface compound coating may further comprise the steps:
(1) spheroidal graphite cast iron tube outer surface pre-treatment: to cast-iron pipe and pipe fitting surface treatment, remove impurity such as descaling, oil, water, dust before the thermospray.
(2) spraying ceramic coat: the ceramic coating raw materials mix is even; Adopt HVOF equipment that the ceramic coating raw material is sprayed at the spheroidal graphite cast iron tube outer surface, HVOF equipment comprises flame plating rifle, powder feeder, air compressor machine, oxygen and acetylene gas pipeline system etc.;
Ceramic coating weight on the spheroidal graphite cast iron tube outer surface is 240g/m
2, ceramic coating raw material powder diameter is 30 microns; The ceramic coating raw material is made up of following material by mass percentage: Al
2O
347%, TiO
23%, Cr
2O
350%.
Hardness value >=the HRC 69 of ceramic coating.
(3) apply the sealing of hole finish(ing) coat
Apply epoxy resin at the ceramic coating outside surface, the thickness of epoxy resin layer is 120 microns.
Embodiment 4
A kind of preparation method of spheroidal graphite cast iron tube outer surface compound coating may further comprise the steps:
(1) spheroidal graphite cast iron tube outer surface pre-treatment: to cast-iron pipe and pipe fitting surface treatment, remove impurity such as descaling, oil, water, dust before the thermospray.
(2) spraying ceramic coat: the ceramic coating raw materials mix is even; Adopt flame plating equipment that the ceramic coating raw material is sprayed at the spheroidal graphite cast iron tube outer surface, flame plating equipment comprises flame plating rifle, powder feeder, air compressor machine, oxygen and acetylene gas pipeline system etc.;
Ceramic coating weight on the spheroidal graphite cast iron tube outer surface is 300g/m
2, ceramic coating raw material powder diameter is 15 microns; The ceramic coating raw material is made up of following material by mass percentage: Al
2O
345%, TiO
21%, Cr
2O
354%.
Hardness value >=the HRC 68 of ceramic coating.
(3) apply the sealing of hole finish(ing) coat
Apply phosphagel phosphaljel at the ceramic coating outside surface, the thickness of phosphoric acid aluminium lamination is 70 microns.
Claims (2)
1. the preparation method of a spheroidal graphite cast iron tube outer surface compound coating is characterized in that: may further comprise the steps:
(1) spheroidal graphite cast iron tube outer surface pre-treatment;
(2) spraying ceramic coat: the ceramic coating raw materials mix is even, adopt flame plating equipment that the ceramic coating raw material is sprayed at the spheroidal graphite cast iron tube outer surface, the ceramic coating weight on the spheroidal graphite cast iron tube outer surface is 80～300g/m
2, said ceramic coating raw material powder diameter is 5～60 microns; Said ceramic coating raw material is made up of following material by mass percentage: Al
2O
330～70%, TiO
21～20%, surplus is Cr
2O
3
(3) apply the sealing of hole finish(ing) coat
Promptly apply organic or inorganic paint at the ceramic coating outside surface, thickness of coating layer is 70～150 microns.
2. the preparation method of a kind of spheroidal graphite cast iron tube outer surface compound coating as claimed in claim 1 is characterized in that: the ceramic coating weight on the spheroidal graphite cast iron tube outer surface is 180g/m
2
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210147784.1A CN102676971B (en) | 2012-05-14 | 2012-05-14 | Preparation method for composite coating of outer surface of nodular cast iron pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210147784.1A CN102676971B (en) | 2012-05-14 | 2012-05-14 | Preparation method for composite coating of outer surface of nodular cast iron pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102676971A true CN102676971A (en) | 2012-09-19 |
| CN102676971B CN102676971B (en) | 2014-11-26 |
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|---|---|---|---|
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Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102676971B (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103146907A (en) * | 2013-03-25 | 2013-06-12 | 南京梅山冶金发展有限公司 | Cold-rolled high-temperature furnace roller covered with oxide ceramic coating |
| CN103373033A (en) * | 2012-04-17 | 2013-10-30 | 新兴铸管股份有限公司 | Zn-Al-Mg-RE pseudo-alloy coating and preparation method thereof |
| CN103465549A (en) * | 2013-07-26 | 2013-12-25 | 天津大学 | Thermal barrier coating including anti-thermal corrosion transition bottom layer and preparation method thereof |
| CN103938145A (en) * | 2013-01-20 | 2014-07-23 | 江苏兆龙电气有限公司 | Preparation method for metal ceramic material with copper liquor corrosion resistance |
| CN106439260A (en) * | 2016-12-07 | 2017-02-22 | 大连圣洁热处理科技发展有限公司 | Nodular cast iron pipe with compound layer structure and preparation method thereof |
| CN106425332A (en) * | 2016-12-09 | 2017-02-22 | 大连圣洁真空技术开发有限公司开发区分公司 | Tubular productsurface treatment process |
| CN106498329A (en) * | 2016-12-07 | 2017-03-15 | 大连圣洁热处理科技发展有限公司 | A kind of composite bed ductile iron pipe and preparation method thereof |
| CN106521479A (en) * | 2016-12-13 | 2017-03-22 | 大连圣洁热处理科技发展有限公司 | Manufacturing method of titanium plate comprising composite layer |
| CN106702368A (en) * | 2016-12-13 | 2017-05-24 | 大连圣洁热处理科技发展有限公司 | Composite-layer metal plate |
| CN106764121A (en) * | 2016-12-08 | 2017-05-31 | 大连圣洁热处理科技发展有限公司 | A kind of water transferring line process of surface treatment |
| CN107051839A (en) * | 2017-02-14 | 2017-08-18 | 广东欧珀移动通信有限公司 | Method for preparing a metal fitting, metal fitting and mobile terminal |
| CN108796357A (en) * | 2018-07-12 | 2018-11-13 | 佛山市高明康得球铁有限公司 | A kind of preparation method of the composite material comprising spheroidal graphite cast-iron |
| CN114101007A (en) * | 2021-11-30 | 2022-03-01 | 国铭铸管股份有限公司 | Method for reducing lining cracks of nodular cast iron pipe |
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| CN103373033A (en) * | 2012-04-17 | 2013-10-30 | 新兴铸管股份有限公司 | Zn-Al-Mg-RE pseudo-alloy coating and preparation method thereof |
| CN103373033B (en) * | 2012-04-17 | 2016-03-30 | 新兴铸管股份有限公司 | Zn-Al-Mg-RE pseudo alloy coating and preparation method thereof |
| CN103938145A (en) * | 2013-01-20 | 2014-07-23 | 江苏兆龙电气有限公司 | Preparation method for metal ceramic material with copper liquor corrosion resistance |
| CN103938145B (en) * | 2013-01-20 | 2016-02-17 | 江苏兆龙电气有限公司 | The preparation method of the corrosion of resistance to copper cermet material |
| CN103146907A (en) * | 2013-03-25 | 2013-06-12 | 南京梅山冶金发展有限公司 | Cold-rolled high-temperature furnace roller covered with oxide ceramic coating |
| CN103465549A (en) * | 2013-07-26 | 2013-12-25 | 天津大学 | Thermal barrier coating including anti-thermal corrosion transition bottom layer and preparation method thereof |
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| CN106439260A (en) * | 2016-12-07 | 2017-02-22 | 大连圣洁热处理科技发展有限公司 | Nodular cast iron pipe with compound layer structure and preparation method thereof |
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| CN106764121B (en) * | 2016-12-08 | 2019-03-26 | 大连圣洁热处理科技发展有限公司 | A kind of water transferring line process of surface treatment |
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