CN101994076A - Ferrous chlorine corrosion resistant electric arc spraying powder core wire - Google Patents
Ferrous chlorine corrosion resistant electric arc spraying powder core wire Download PDFInfo
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Abstract
The invention relates to a ferrous chlorine corrosion resistant electric arc spraying powder core wire and belongs to the technical field of hot air spraying in material processing engineering. The wire is mainly used for protecting the surface of a heated metal pipe wall in a garbage incinerating and circulating fluidized bed boiler. In the powder core wire, a stainless steel skin is used to cover powder core; the powder core accounts for 29 to 35 mass percent of the wire; the powder core comprises the following components in mass percentage: 32 to 44 percent of metallic nickel, 23 to 34 percent of metallic chromium, 6.4 to 12 percent of metallic aluminum, 0 to 9 percent of nickel aluminum alloy, 5.4 to 16 percent of metallic molybdenum, 0 to 8 percent of ferromolybdenum and 2 to 8.3 percent of rare earth. A coating prepared from the developed ferrous chlorine resistant electric arc spraying powder core wire has uniform and compact structure, the high-temperature oxidation resistance, chlorination corrosion resistance and salt spray corrosion resistance are higher than those of 20G of mild steel under the condition of a great amount of iron elements, and the cost for spraying the wire is reduced to a great extent.
Description
Technical field
The present invention relates to a kind of arc spraying coating powder core wire, belong to the technical field of hot in the Materials Processing Engineering, be mainly used in the surfacecti proteon of heated metal tube wall in the waste incineration circular fluid bed.
Background technology
In recent years, because the solid waste domestic refuse has caused ill effect to environment, the handling problem of rubbish has become global environment problem.At present, the method for handling domestic refuse both at home and abroad mainly contains: burning method, composting process, landfill method, harmless comprehensive treatment method.Wherein burning away the refuse generating is to realize domestic garbage resource, minimizing and innoxious effective way, meets the social development requirement of low-carbon (LC), energy-conservation and environmental protection, is the inevitable development trend of refuse treatment, now just widelys popularize in China.
But all contain the chlorine element in many rubbish, because the existence of chlorine element makes the corrosion of the metal heated tube-surface of garbage burning boiler much more serious than traditional fire coal, oil-firing boiler, the accident that the causes rate that takes place frequently also increases greatly, the bottleneck that this has become the technical development of restriction waste incineration and generating electricity has had a strong impact on the safe operation of garbage burning boiler.Therefore, the high temperature corrosion problem of solution refuse-burning boilers heated metal tube wall is extremely urgent.
Adopting arc spraying technology that boiler heat pipe face is protected, is a kind of the most economic, the effective safeguard procedures that adopt at present.But because waste incineration and generating electricity is a firm new developing technology, before this, nearly all arc spraying filament material all designs for coal firing boiler, so the corrosion resistance nature in garbage burning boiler of these spray material is very undesirable.At present unique in garbage burning boiler the reasonable electric arc spraying material of corrosion resistance nature be the solid silk of nimonic, its composition is: chromium 45%, nickel 51%, titanium 4%, since its alloying element content height, and do not contain ferro element, so its high temperature oxidation resisting and corrosion and heat resistant are good.But the solid silk of nimonic cost is very high, costs an arm and a leg, and is difficult to promote the use of on a large scale.Therefore, be badly in need of the arc spraying filament material that antiseptic property is good, cost is cheaper in the garbage burning boiler antiseptic project.
Summary of the invention
The invention reside in provides a kind of iron-based arc spraying powder core wire material that is used for the protection of waste incineration circular fluid bed heated metal tube wall surface, under prerequisite with good corrosion-resistant and antioxidant property, reduce the cost of spraying wire significantly, make it in the protection of waste incineration circular fluid bed, can obtain to use widely.
Iron-based arc sprayed powder core wire provided by the present invention is characterized in that, described powder core wire adopts stainless steel crust parcel powder core; The mass percent of described powder core the line is busy material is 29-35%; Described each component of powder core and quality percentage composition scope thereof are as follows: metallic nickel: 32-44%; Chromium metal: 23-34%; Metallic aluminium: 6.4-12%; Alumel: 0-9%; Metal molybdenum: 5.4-16%; Molybdenum-iron: 0-8%; Rare earth: 2-8.3%; Rare earth quality percentage composition is: cerium 48.8%, neodymium 34.7%, lanthanum 14.8% also has 1.7% ferric oxide.
Preparation method of the present invention adopts existing powder core wire technology of preparing, may further comprise the steps:
1, be that the Stainless Steel Band of thick 0.3mm * wide 10mm rolls into the U type with specification, add described powder core powder in U type groove, the mass percent of the powder core of inserting the line is busy material is 29-35%;
2, the capable groove of U is healed up, by road drawing, tube reducing, obtain the finished product that diameter is 2.0mm at last by wortle.
Test method
The high temperature oxidation experiment is carried out according to international GB/T 10125-88 standard, and the heating installation of use is the SX2-5-17 chamber type electric resistance furnace that Shanghai Electric Furnace Factory produces, and adopts the not pure coating sample and the low-carbon (LC) 20G steel of ribbon matrix, and test temperature is 650 ℃.At first measure the surface-area of sample, weigh the initial mass of sample, coating sample and control sample are put into resistance furnace together carry out oxidation experiment.Adopt the weightening finish method to come the oxidizing reaction rate of quantificational expression sample.What mass measurement was adopted is the BS2202S electronic balance of Beijing Sai Duolisi instrument company, is accurate to 0.0001g.Total oxidization time 100h, taking out sample every 10h once weighs, measure and record behind the cool to room temperature, gain in weight is long-pending divided by specimen surface, obtain the relation between per surface area oxidation weight gain and the oxidization time, calculate, draw the high temperature oxidation and corrosion weightening finish graphic representation that obtains at last shown in Fig. 3 by data preparation.
High-temp chlorination corrosion test, the heating installation of use are the SX2-5-17 chamber type electric resistance furnaces that Shanghai Electric Furnace Factory produces, and adopt the not pure coating sample and the low-carbon (LC) 20G steel of ribbon matrix, and test temperature is 650 ℃.At first measure the surface-area of sample, will coat analytical pure ZnCl after the sample preheating
2The saturated aqueous solution of-KCl (mol ratio is 55: 45) preparation, drying and dewatering is weighed then, and specimen surface is coated with the salt amount and is controlled at 2-3mg/cm at last
2About.Weigh the initial mass of sample, coating sample and control sample are put into resistance furnace together.The corrosion reaction speed that adopts the weightening finish method to come the quantificational expression sample.What mass measurement was adopted is the BS2202S electronic balance of Beijing Sai Duolisi instrument company, is accurate to 0.0001g.Total etching time 100h, taking out sample every 10h once weighs, measure and record behind the cool to room temperature, gain in weight is long-pending divided by specimen surface, obtain per surface area chlorination surrosion and the relation between the time, obtain the high-temp chlorination surrosion graphic representation shown in Fig. 4 at last by data preparation calculating, drafting.
The salt air corrosion performance test according to GB GB/T10125-88, is carried out the salt spray corrosion test in the artificial atmosphere in the FQY015 salt-spray cabinet that plant and instrument company limited in Shanghai produces.Test conditions: brine concentration NaCl (50 ± 5) gL
-1, salt fog the temperature inside the box is (35 ± 2) ℃, rate of salt spray precipitation, (0.01625～0.0212) mlh
-1Cm
-2, spray pattern is that every 10h is the continuous spraying of one-period, stop-spraying 14h, and 24h takes out cleaning, oven dry, weighing, total etching time 100h.What mass measurement was adopted is the BS2202S electronic balance that Beijing Sai Duolisi instrument company produces, and is accurate to 0.0001g.Taking out sample every 24h once weighs, measure and record behind oven dry, the cool to room temperature, gain in weight is long-pending divided by specimen surface, obtain per surface area chlorination surrosion and the relation between the time, calculate, draw the salt air corrosion weightening finish graphic representation that obtains at last shown in Fig. 5 by data preparation.
In above-mentioned test, select the solid silk of homemade commercially available nimonic (PS45) coating and 20G soft steel for use, compare with the antioxidant property and the corrosion resistance nature of the iron-based arc sprayed powder core of anti-chlorine corrosion method and equipment for coating of coil and stsip of being developed.
Description of drawings
Fig. 1: the cross section microscopic appearance of the iron-based arc spraying coating of anti-chlorine corrosion of embodiment 1 preparation.
Fig. 2: the XRD figure spectrum of the iron-based arc spraying coating of anti-chlorine corrosion of embodiment 2 preparations.
Fig. 3: the iron-based arc spraying coating of anti-chlorine corrosion of embodiment 1,2,3,4 preparations, the high temperature oxidation dynamic curve under 650 ℃ of conditions without 20G soft steel that sprays and solid silk material PS45 coating.
Fig. 4: the iron-based arc spraying coating of anti-chlorine corrosion of embodiment 1,2,3,4 preparations, the high-temp chlorination corrosion dynamic curve under 650 ℃ of conditions without 20G soft steel that sprays and solid silk material PS45 coating.
Fig. 5: the iron-based arc spraying coating of anti-chlorine corrosion of embodiment 1,2,3,4 preparations, the salt air corrosion weightening finish curve under 35 ℃ of conditions without 20G soft steel that sprays and solid silk material PS45 coating.
Embodiment
The sub-middle-weight rare earths of following examples is that alloy company limited of Jinzhou HTC produces rich cerium type rare earth, and composition is: cerium 48.8%, neodymium 34.7%, lanthanum 14.8% also has 1.7% ferric oxide.Alumel (nickel accounts for 48%), molybdenum-iron (molybdenum nickel accounts for 60%) are sold fixedly uniform alloy powder of composition for Yixing City morning twilight powder metallurgy factory; Granularity: 60-100 order.Above per-cent is mass percent.
Take metallic nickel powder 437 grams, chromium powder 230 grams, aluminium powder 120 grams, alumel powder 52 grams, molybdenum powder 54 grams, molybdenum-iron 45 grams, rare earth 62 grams (granularity of the powder of getting is for passing through 60 purpose sieves).The various powder of get are put into mixed powder machine to be mixed 10 minutes.Selecting specification for use is the 304L stainless steel belt of thick 0.3mm * wide 10mm, earlier it is rolled into the U type, then mixed powder is added in the 304L stainless steel belt groove of U type, and filling ratio is 29%.U type groove is healed up, again through wortle gradually tube reducing make its diameter reach 2.0mm.Spraying coating process is: System for Electric Arc Spraying Current 180-200A, spray voltage 30-32V, spraying air pressure 0.6MP, spray distance 150-200mm.The cross section microscopic appearance of coating is seen Fig. 1; Pyro-oxidation resistance correlation curve, high temperature resistant chlorination corrosive nature correlation curve and the salt air corrosion performance comparison curve of embodiment 1 coating, 20G soft steel and commercially available solid silk material PS45 coating are seen Fig. 3, Fig. 4, Fig. 5 respectively.
Take metallic nickel powder 320 grams, chromium powder 338 grams, aluminium powder 106 grams, molybdenum powder 158 grams, molybdenum-iron 58 grams, rare earth 20 grams (granularity of the powder of getting is for passing through 60 purpose sieves).The various powder of get are put into mixed powder machine to be mixed 10 minutes.Selecting specification for use is the 304L stainless steel belt of thick 0.3mm * wide 10mm, earlier it is rolled into the U type, then mixed powder is added in the 304L stainless steel belt groove of U type, and filling ratio is 32%.U type groove is healed up, again through wortle gradually tube reducing make its diameter reach 2.0mm.Spraying coating process is: spraying current 180-200A, spray voltage 30-32V, spraying air pressure 0.6MP, spray distance 150-200mm.The XRD figure spectrum of embodiment 2 coatings is seen Fig. 2; Pyro-oxidation resistance correlation curve, high temperature resistant chlorination corrosive nature correlation curve and the salt air corrosion performance comparison curve of embodiment 2 coatings, 20G soft steel and commercially available solid silk material PS45 coating are seen Fig. 3, Fig. 4, Fig. 5 respectively.
Take metallic nickel powder 368 grams, chromium powder 280 grams, aluminium powder 97 grams, alumel powder 90 grams, molybdenum powder 82 grams, rare earth 83 grams (granularity of the powder of getting is for passing through 60 purpose sieves).The various powder of get are put into mixed powder machine to be mixed 10 minutes.Selecting specification for use is the 304L stainless steel belt of thick 0.3mm * wide 10mm, earlier it is rolled into the U type, then mixed powder is added in the 304L stainless steel belt groove of U type, and filling ratio is 35%.U type groove is healed up, again through wortle gradually tube reducing make its diameter reach 2.0mm.Spraying coating process is: spraying current 180-200A, spray voltage 30-32V, spraying air pressure 0.6MP, spray distance 150-200mm.Pyro-oxidation resistance correlation curve, high temperature resistant chlorination corrosive nature correlation curve and the salt air corrosion performance comparison curve of embodiment 3 coatings, 20G soft steel and commercially available solid silk material PS45 coating are seen Fig. 3, Fig. 4, Fig. 5 respectively.
Take metallic nickel powder 427 grams, chromium powder 260 grams, aluminium powder 64 grams, alumel powder 72 grams, molybdenum powder 70 grams, molybdenum-iron 40 grams, rare earth 67 grams (granularity of the powder of getting is for passing through 60 purpose sieves).The various powder of get are put into mixed powder machine to be mixed 10 minutes.Selecting specification for use is the 304L stainless steel belt of thick 0.3mm * wide 10mm, earlier it is rolled into the U type, then mixed powder is added in the 304L stainless steel belt groove of U type, and filling ratio is 30%.U type groove is healed up, again through wortle gradually tube reducing make its diameter reach 2.0mm.Spraying coating process is: spraying current 180-200A, spray voltage 30-32V, spraying air pressure 0.6MP, spray distance 150-200mm.Pyro-oxidation resistance correlation curve, high temperature resistant chlorination corrosive nature correlation curve and the salt air corrosion performance comparison curve of embodiment 4 coatings, 20G soft steel and commercially available solid silk material PS45 coating are seen Fig. 3, Fig. 4, Fig. 5 respectively.
The iron-based arc spraying coating of anti-chlorine corrosion of embodiment 1,2,3,4 preparation, see Table 1 without the 20G soft steel of spraying and the performance comparison of solid silk material PS45 coating.
By table 1 and Fig. 3 as seen, the pyro-oxidation resistance of the iron-based arc spraying powder core wire material of being developed of anti-the chlorine corrosion far above 20G soft steel, is 18.6 times of 20G soft steel; A little less than the solid silk of nimonic PS45 coating, be 0.752 times of the solid silk of nimonic PS45 coating.
By table 1 and Fig. 4 as seen, the high temperature resistant chlorination corrosive nature of the iron-based arc spraying powder core wire material of being developed of anti-the chlorine corrosion far above 20G soft steel, is 12.5 times of 20G soft steel; A little less than the solid silk of nimonic PS45 coating, be 0.703 times of the solid silk of nimonic PS45 coating.
By table 1 and Fig. 5 as seen, the salt air corrosion performance of the iron-based arc spraying powder core wire material of being developed of anti-the chlorine corrosion far above 20G soft steel, is 14.5 times of 20G soft steel; A little less than the solid silk of nimonic PS45 coating, be 0.754 times of the solid silk of nimonic PS45 coating.
Above-mentioned test-results shows, the even structure of the iron-based arc spraying powder core wire material of anti-chlorine corrosion coatings prepared of being developed, fine and close, containing under the condition of a large amount of ferro elements, still good high temperature oxidation resistance and corrosion resistance nature have been obtained, its high temperature oxidation resistance, anti-chlorination corrosive nature and salt spray corrosion resistance are far above 20G soft steel, though PS45 is slightly poor than the solid silk of nimonic, but it is quite approaching, particularly the material cost of manufacture has only more than 40% of the solid silk of nimonic PS45, cost descends significantly, cost performance obviously improves, and has very strong economic and practical.
Table 1: the iron-based arc spraying coating of anti-chlorine corrosion of embodiment 1,2,3,4 preparation, without the 20G soft steel of spraying and the relative antioxidant property and the corrosion resistance nature contrast of solid silk material PS45 coating.
The performance comparison of the solid silk of table 1 embodiment coating and 20G steel and PS45 coating
Claims (1)
1. the iron-based arc sprayed powder of anti-chlorine corrosion core wire is characterized in that, described powder core wire adopts stainless steel crust parcel powder core; The mass percent of described powder core the line is busy material is 29-35%; Described each component of powder core and quality percentage composition scope thereof are as follows: metallic nickel: 32-44%; Chromium metal: 23-34%; Metallic aluminium: 6.4-12%; Alumel: 0-9%; Metal molybdenum: 5.4-16%; Molybdenum-iron: 0-8%; Rare earth: 2-8.3%; Rare earth quality percentage composition is: cerium 48.8%, neodymium 34.7%, lanthanum 14.8% also has 1.7% ferric oxide.
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| CN201010571010A CN101994076B (en) | 2010-11-26 | 2010-11-26 | Ferrous chlorine corrosion resistant electric arc spraying powder core wire |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104878344A (en) * | 2015-05-22 | 2015-09-02 | 山西华辉恒源防腐工程有限公司 | Novel spraying technology for corrosion prevention and abrasion prevention of boiler |
| CN109457206A (en) * | 2018-11-30 | 2019-03-12 | 沈阳工程学院 | A kind of preparation method of biomass boiler heating surface protective coating |
| JP2019513083A (en) * | 2016-03-22 | 2019-05-23 | スコペルタ・インコーポレイテッドＳｃｏｐｅｒｔａ， Ｉｎｃ． | Fully readable thermal spray coating |
| US11939646B2 (en) | 2018-10-26 | 2024-03-26 | Oerlikon Metco (Us) Inc. | Corrosion and wear resistant nickel based alloys |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104878344A (en) * | 2015-05-22 | 2015-09-02 | 山西华辉恒源防腐工程有限公司 | Novel spraying technology for corrosion prevention and abrasion prevention of boiler |
| JP2019513083A (en) * | 2016-03-22 | 2019-05-23 | スコペルタ・インコーポレイテッドＳｃｏｐｅｒｔａ， Ｉｎｃ． | Fully readable thermal spray coating |
| US11279996B2 (en) | 2016-03-22 | 2022-03-22 | Oerlikon Metco (Us) Inc. | Fully readable thermal spray coating |
| JP7217150B2 (en) | 2016-03-22 | 2023-02-02 | エリコン メテコ（ユーエス）インコーポレイテッド | Fully readable thermal spray coating |
| US11939646B2 (en) | 2018-10-26 | 2024-03-26 | Oerlikon Metco (Us) Inc. | Corrosion and wear resistant nickel based alloys |
| CN109457206A (en) * | 2018-11-30 | 2019-03-12 | 沈阳工程学院 | A kind of preparation method of biomass boiler heating surface protective coating |
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