CN108559940A - A kind of wear-resistant erosion shield and spraying method of hydraulic and hydroelectric engineering steel-slag sand - Google Patents

Abstract

The present invention discloses a kind of wear-resistant erosion shield of hydraulic and hydroelectric engineering steel-slag sand, it includes the prime coat for being sprayed at steel-slag sand outer surface, the thickness of prime coat is 60~80 μm, and the zinc silk using purity more than or equal to 99.99% is raw material, a diameter of 2.0~3.0mm of silk material；It is sprayed at the wearing layer of prime coat outer surface, the thickness of wearing layer is 60~80 μm, and raw material is stainless steel alloy powder, and powder size is 75~200 μm；It is sprayed at the confining bed of wearing layer outer surface, the thickness of confining bed is 30~50 μm, and raw material is wear-resisting epoxy finish；The invention also discloses the spraying methods of above-mentioned wear-resistant erosion shield.The coating of the present invention has good antiseptic property, suitable hardness and bond strength, and wear-resisting property is good, can be properly arrived at hydraulic and hydroelectric engineering steel-slag sand in the wear-resistant etch-proof requirement in high silt operating mode lower surface.

Description

A kind of wear-resistant erosion shield and spraying method of hydraulic and hydroelectric engineering steel-slag sand

Technical field

The invention belongs to water conservancy and hydropower industry anti-corrosion material technical fields, more particularly, to a kind of hydraulic and hydroelectric engineering steel The wear-resistant erosion shield and spraying method of gate.

Background technology

With the development of modern society, steel-slag sand is the important component for being widely used in hydraulic structure, it is main It can be used to intercept flow, control water level adjusts flow, discharge silt and drift etc..Steel-slag sand is exposed to the sun by sunlight for a long time, And often contacted with various liquid substances, it is often operated under acid-alkali salt and wet environment, residing environment needs relatively good Anticorrosion effect needs to be coated with special-purpose coat in steel-slag sand structural outer surface.

Common Hydraulic Steel-structure metal coating have zinc, aluminium, allumen, zinc magnesium alloy, spray rare earth aluminium, first spray zinc after spray Aluminium and first aluminium-plated rear spray zinc, coating layer thickness control are easily passivated in 120 μm or so, Al-based coating and lose cathodic protection effect, Later stage easily appearance is bubbled and white object precipitation phenomenon, and zinc base coat particle is relatively thin and uniform, and cathodic protection effect stability is reliable, The disadvantage is that the case hardness of zinc layers is poor, wearability and anti-destructive are poor, it is thus impossible to meet special wear-resistant working condition lock The operation of door needs, and influences Hydraulic Metal service life.Currently, Gate for Desilting Tunnel main gate uses " epoxy zinc-rich Anti-corrosive primer+epoxy stainless steel flakes paint " is used as wear-resistant Project for Corrosion Protection, although improving corrosion protection abrasion resistant performance to a certain degree, But still cannot meet the requirements, initial operation stage operation is frequent, the machinery mill between gate panel and coarse sediment and turning hinge sealing Damage is particularly acute, and this abrasion increases the expense of anti-corrosion maintenance, it is crucial that abrasion, corrosion and frequent anti-corrosion, sandblasting Stronger destruction is generated to gate matrix, keeps gate thinning, shortens the service life of gate, jeopardize the safe operation of gate.

The protection period of stainless steel coating is 40 years or so, its advantage is that hardness is high, wearability is good, intensity is big, collapse resistance Performance is good, the disadvantage is that easy-to-rust, without cathode protecting function, rough surface, porosity is big, and impermeable ability is weak, seldom in water conservancy project It is applied in steel construction.

Tungsten-carbide cermet, main component are WC-CoCr (Ni), are to have excellent wear-resistant and cavitation-preventive, anticorrosion The coating of effect, coating is fine and close and bond strength is high, and wear-resisting property is good, but spraying equipment is expensive, and sprays and require and spray Painting cost is all very high, and coating is once not easily repaired by destruction.

Invention content

To solve the above-mentioned problems, the object of the present invention is to provide a kind of wear-resistant anticorrosions of hydraulic and hydroelectric engineering gate Coating, with good antiseptic property, suitable hardness and bond strength, wear-resisting property is good, can be properly arrived at water Sharp hydroelectric project steel-slag sand is in the wear-resistant etch-proof requirement in high silt operating mode lower surface；Meanwhile above-mentioned wear-resistant anticorrosion being disclosed The spraying method of coating makes gate that there is good wear-corrosion resistance, door surfaces anti-corrosion life to greatly improve.

For achieving the above object, the present invention adopts the following technical scheme that：

A kind of wear-resistant erosion shield of hydraulic and hydroelectric engineering steel-slag sand comprising be sprayed at the bottoming of steel-slag sand outer surface Layer, the thickness of prime coat are 60~80 μm, the zinc silk using purity more than or equal to 99.99% as raw material, silk material a diameter of 2.0~ 3.0mm, prime coat include each component of following mass percent：Sn≤0.0002%、Pb≤0.0022%、Cd≤0.0004%、Cu ≤0.0004%、Fe≤0.0009%、Zn≥99.9959%；It is sprayed at the wearing layer of prime coat outer surface, the thickness of wearing layer is 60~80 μm, raw material is stainless steel alloy powder, and powder size is 75~200 μm, includes each component of following mass percent： C≤0.031%, Si≤0.047%, Mn≤1.35%, P≤0.029%, S≤0.003%, Ni 10.0~14.0%, Cr16.0~ 18.0%, 2.0~3.0% Mo, surplus Fe；It is sprayed at the confining bed of wearing layer outer surface, the thickness of confining bed is 30~50 μ M, raw material are wear-resisting epoxy finish.

The spraying method of the wear-resistant erosion shield of the hydraulic and hydroelectric engineering steel-slag sand comprising following steps：

S1, steel-slag sand surface is cleared up and be roughened using blasting treatment mode, steel-slag sand surface cleanness is made to handle into GB8923 Within the scope of 2.5 grades, roughness Rz to 60~100 μm of defined Sa；

S2, the floating dust that steel-slag sand surface adhesion is blown clean with compressed air；

S3, using electric arc spraying equipment in steel-slag sand surface spraying prime coat, spraying parameter is：28~35V of operating voltage, 120~180A of operating current, compressed air pressure 0.5~0.8 MPa, 2~4m/min of wire feed rate, spray gun movement speed 2~ 4m/min, 150~200mm of spray distance, spraying passage are 1~2,60~90 ° of spray angle, and 1/ is overlapped between adjacent spraying swath 3, coating thickness is 60~80 μm, and spray gun is moved with groined type path and carries out spraying operation；

S4, using flame spray device in prime coat surface spraying wearing layer, spraying parameter is：Oxygen pressure 0.3~ 0.8MPa, 0.08~0.12Mpa of acetylene pressure, oxygen flow are 400~470L/min, and acetylene flow is 40~50L/min, pressure 0.5~0.8 MPa of contracting air pressure, 40~65 g/min of powder sending quantity, spray gun 2~4m/min of movement speed, spray distance 180~ 220mm, spraying passage are 1~2,60~90 ° of spray angle, 1/3 are overlapped between adjacent spraying swath, coating thickness is 60~80 μ M, spray gun are moved with groined type path and carry out spraying operation；

S5, using high pressure airless spraying apparatus in wearing layer surface spraying confining bed, spraying parameter is：Nozzle diameter is 0.17~0.25mm, spray gun 18~24m/min of movement speed, 200~400mm of spray distance, spraying passage are 1~2, spraying 60~90 ° of angle is overlapped 1/4 between adjacent spraying swath, and coating thickness is 30~50 μm.

The wear-resisting epoxy finish of raw material that above-mentioned confining bed uses is commercial product in the prior art.

Due to using technical solution as described above, the present invention that there is following superiority：

The wear-resistant erosion shield of hydraulic and hydroelectric engineering steel-slag sand of the present invention, uses spelter coating as the moon of steel-slag sand matrix Pole is protected, then has the characteristics that high intensity, high abrasion and long-life and sealing paint by stainless steel to make up stainless steel watch The disadvantage that face is coarse, porosity is big, impermeable ability is weak forms the assembled scheme of spray zinc+storage tank+confining bed, wear-resistant anti- Corrosive effect is good, and advantage of lower cost, convenient for promoting；Economic loss caused by due to erosion corrosion can be reduced, is reached Material, energy-efficient effect are saved, energy conservation and environmental protection policy is met；Efficiently solve the two fold problem of abrasion and electrochemical corrosion, Neng Gouxian The anti-corrosion period for extending gate panel is write, gate anti-corrosion maintenance expense is greatly reduced, solves the anti-of gate panel generally existing Grind Anticorrosion Problems.

The wear-resistant erosion shield of hydraulic and hydroelectric engineering steel-slag sand of the present invention, it is easy for construction, when not only solving long Between run the corrosion problem occurred in wet condition, while also solving the mill unavoidably occurred under high sediment environment Damage significantly improves performance of both the wear-resisting of gate panel, anticorrosion.

Specific implementation mode

Technical scheme of the present invention is described in further detail referring to following embodiment；But following embodiment Only illustration, the invention is not limited in these embodiments.

Embodiment 1

A kind of wear-resistant erosion shield of hydraulic and hydroelectric engineering steel-slag sand comprising be sprayed at the bottoming of steel-slag sand outer surface The thickness of layer, prime coat is 60 μm, and the zinc silk using purity more than or equal to 99.99% is raw material, a diameter of 2.0mm of silk material, prime coat Include each component of following mass percent：Sn 0.0001%、Pb 0.0012%、Cd 0.0002%、Cu 0.0002%、Fe 0.00024%、Zn 99.9959%；It is sprayed at the wearing layer of prime coat outer surface, the thickness of wearing layer is 60 μm, and raw material is stainless Steel alloy powder, powder size are 75 μm, include each component of following mass percent：C 0.015%、Si 0.020%、Mn 0.50%, P 0.016%, S 0.003%, Ni 10.0%, Cr 16.0%, Mo 2.0%, surplus Fe；It is sprayed at wearing layer outer surface Confining bed, the thickness of confining bed is 30 μm, and raw material is wear-resisting epoxy finish.

The spraying method of the wear-resistant erosion shield of above-mentioned hydraulic and hydroelectric engineering steel-slag sand comprising walk in detail below Suddenly：

S1, steel-slag sand surface is cleared up and be roughened using blasting treatment mode, steel-slag sand surface cleanness is made to handle into GB8923 Within the scope of 2.5 grades, roughness Rz to 60 μm of defined Sa；

S2, the floating dust that steel-slag sand surface adhesion is blown clean with compressed air；

S3, using electric arc spraying equipment in steel-slag sand surface spraying prime coat, spraying parameter is：Operating voltage 28V, work Electric current 120A, 0.5 MPa of compressed air pressure, wire feed rate 2m/min, spray gun movement speed 2m/min, nozzle is away from table to be sprayed The spray distance 100mm in face, spraying passage are 1,60~90 ° of spray angle, should be overlapped 1/3 between adjacent spraying swath, spraying is thick Degree is 60 μm, and spray gun between twice trend is answered orthogonal, and spray gun is moved with groined type path and carries out spraying operation；Spraying is applied The interval time of work and surface preparation shortens as far as possible, should spray and finish in 2h, 8h is not to be exceeded in longest；

S4, using flame spray device in prime coat surface spraying wearing layer, spraying parameter is：Oxygen pressure 0.3MPa, Acetylene pressure 0.08Mpa, oxygen flow 400L/min, acetylene flow are 40L/min, 0.5 MPa of compressed air pressure, powder feeding 40 g/min, spray gun movement speed 2m/min, spray distance 180mm are measured, spraying passage is 2,60~90 ° of spray angle, phase 1/3 should be overlapped between adjacent spraying swath, coating thickness is 60 μm, and spray gun is moved with groined type path and carries out spraying operation；

S5, using high pressure airless spraying apparatus in wearing layer surface spraying confining bed, spraying parameter is：Nozzle diameter is 0.17mm, spray gun movement speed 18m/min, spray distance 200mm, spraying passage are 1,60~90 ° of spray angle, adjacent spray 1/4 should be overlapped between width, coating thickness is 30 μm.

Embodiment 2

A kind of wear-resistant erosion shield of hydraulic and hydroelectric engineering steel-slag sand comprising be sprayed at the bottoming of steel-slag sand outer surface The thickness of layer, prime coat is 66 μm, and the zinc silk using purity more than or equal to 99.99% is raw material, a diameter of 2.3mm of silk material, prime coat Include each component of following mass percent：Sn 0.00011%、Pb 0.0012%、Cd 0.0004%、Cu 0.0003%、Fe 0.0005%、Zn 99.9965%；It is sprayed at the wearing layer of prime coat outer surface, the thickness of wearing layer is 65 μm, and raw material is stainless Steel alloy powder, powder size are 90 μm, include each component of following mass percent：C 0.020%、Si 0.030%、Mn 0.80%, P 0.010%, S 0.002%, Ni 11.5%, Cr 16.8%, Mo 2.3%, surplus Fe；It is sprayed at wearing layer outer surface Confining bed, the thickness of confining bed is 35 μm, and raw material is wear-resisting epoxy finish.

The spraying method of the wear-resistant erosion shield of above-mentioned hydraulic and hydroelectric engineering steel-slag sand comprising walk in detail below Suddenly：

S1, steel-slag sand surface is cleared up and be roughened using blasting treatment mode, steel-slag sand surface cleanness is made to handle into GB8923 Within the scope of 2.5 grades, roughness Rz to 70 μm of defined Sa；

S2, the floating dust that steel-slag sand surface adhesion is blown clean with compressed air；

S3, using electric arc spraying equipment in steel-slag sand surface spraying prime coat, spraying parameter is：Operating voltage 30V, work Electric current 135A, compressed air pressure 0.6MPa, wire feed rate 2.5m/min, spray gun movement speed 2.5m/min, nozzle is away to be painted The spray distance 130mm on surface is applied, spraying passage is 2,60~90 ° of spray angle, should be overlapped 1/3 between adjacent spraying swath, spray It is 65 μm to apply thickness, and spray gun between twice trend is answered orthogonal, and spray gun is moved with groined type path and carries out spraying operation；Spray The interval time for applying construction and surface preparation shortens as far as possible, should spray and finish in 2h, 8h is not to be exceeded in longest；

S4, using flame spray device in prime coat surface spraying wearing layer, spraying parameter is：Oxygen pressure 0.4MPa, Acetylene pressure 0.09Mpa, oxygen flow 420L/min, acetylene flow are 43L/min, 0.6 MPa of compressed air pressure, powder feeding 45 g/min, spray gun movement speed 2.7m/min, spray distance 190mm are measured, spraying passage is 1,60~90 ° of spray angle, 1/3 should be overlapped between adjacent spraying swath, coating thickness is 68 μm, and spray gun is moved with groined type path and carries out spraying operation；

S5, using high pressure airless spraying apparatus in wearing layer surface spraying confining bed, spraying parameter is：Nozzle diameter is 0.19mm, spray gun movement speed 20m/min, spray distance 250mm, spraying passage are 1,60~90 ° of spray angle, adjacent spray 1/4 should be overlapped between width, coating thickness is 38 μm.

Embodiment 3

A kind of wear-resistant erosion shield of hydraulic and hydroelectric engineering steel-slag sand comprising be sprayed at the bottoming of steel-slag sand outer surface The thickness of layer, prime coat is 70 μm, and the zinc silk using purity more than or equal to 99.99% is raw material, a diameter of 2.5mm of silk material, prime coat Include each component of following mass percent：Sn 0.0002%、Pb 0.0016%、Cd 0.0003%、Cu 0.0002%、Fe 0.0004%、Zn 99.9973%；It is sprayed at the wearing layer of prime coat outer surface, the thickness of wearing layer is 70 μm, and raw material is stainless Steel alloy powder, powder size are 130 μm, include each component of following mass percent：C 0.028%、Si 0.019%、Mn 1.00%, P 0.016%, S 0.0019%, Ni 12.4%, Cr 17.5%, Mo 2.7%, surplus Fe；It is sprayed at wearing layer appearance The thickness of the confining bed in face, confining bed is 40 μm, and raw material is wear-resisting epoxy finish.

The spraying method of the wear-resistant erosion shield of above-mentioned hydraulic and hydroelectric engineering steel-slag sand comprising walk in detail below Suddenly：

S1, steel-slag sand surface is cleared up and be roughened using blasting treatment mode, steel-slag sand surface cleanness is made to handle into GB8923 Within the scope of 2.5 grades, roughness Rz to 83 μm of defined Sa；

S2, the floating dust that steel-slag sand surface adhesion is blown clean with compressed air；

S3, using electric arc spraying equipment in steel-slag sand surface spraying prime coat, spraying parameter is：Operating voltage 36V, work Electric current 150A, compressed air pressure 0.67MPa, wire feed rate 3.0m/min, spray gun movement speed 3.0m/min, nozzle is away to be painted The spray distance 150mm on surface is applied, spraying passage is 1,60~90 ° of spray angle, should be overlapped 1/3 between adjacent spraying swath, spray It is 70 μm to apply thickness, and spray gun between twice trend is answered orthogonal, and spray gun is moved with groined type path and carries out spraying operation；Spray The interval time for applying construction and surface preparation shortens as far as possible, should spray and finish in 2h, 8h is not to be exceeded in longest；

S4, using flame spray device in prime coat surface spraying wearing layer, spraying parameter is：Oxygen pressure 0.55MPa, Acetylene pressure 0.11Mpa, oxygen flow 440L/min, acetylene flow are 45L/min, and 0.66 MPa of compressed air pressure is sent 50 g/min of powder amount, spray gun movement speed 3.0m/min, spray distance 200mm, spraying passage are 1, spray angle 60~ 90 °, 1/3 should be overlapped between adjacent spraying swath, coating thickness is 72 μm, and spray gun is moved with groined type path and carries out spraying operation；

S5, using high pressure airless spraying apparatus in wearing layer surface spraying confining bed, spraying parameter is：Nozzle diameter is 0.21mm, spray gun movement speed 20m/min, spray distance 300mm, spraying passage are 1,60~90 ° of spray angle, adjacent spray 1/4 should be overlapped between width, coating thickness is 40 μm.

Embodiment 4

A kind of wear-resistant erosion shield of hydraulic and hydroelectric engineering steel-slag sand comprising be sprayed at the bottoming of steel-slag sand outer surface The thickness of layer, prime coat is 75 μm, and the zinc silk using purity more than or equal to 99.99% is raw material, a diameter of 2.7mm of silk material, prime coat Include each component of following mass percent：Sn 0.0002%、Pb 0.0022%、Cd 0.0004%、Cu 0.0004%、Fe 0.0009%、Zn 99.9959%；It is sprayed at the wearing layer of prime coat outer surface, the thickness of wearing layer is 75 μm, and raw material is stainless Steel alloy powder, powder size are 150 μm, include each component of following mass percent：C 0.031%、Si 0.047%、Mn 1.35%, P 0.029%, S 0.003%, Ni 14.0%, Cr 18.0%, Mo 3.0%, surplus Fe；It is sprayed at wearing layer outer surface Confining bed, the thickness of confining bed is 42 μm, and raw material is wear-resisting epoxy finish.

The spraying method of the wear-resistant erosion shield of above-mentioned hydraulic and hydroelectric engineering steel-slag sand comprising walk in detail below Suddenly：

S1, steel-slag sand surface is cleared up and be roughened using blasting treatment mode, steel-slag sand surface cleanness is made to handle into GB8923 Within the scope of 2.5 grades, roughness Rz to 90 μm of defined Sa；

S2, the floating dust that steel-slag sand surface adhesion is blown clean with compressed air；

S3, using electric arc spraying equipment in steel-slag sand surface spraying prime coat, spraying parameter is：Operating voltage 33V, work Electric current 170A, compressed air pressure 0.75MPa, wire feed rate 3.5m/min, spray gun movement speed 3.5m/min, nozzle is away to be painted The spray distance 180mm on surface is applied, spraying passage is 2,60~90 ° of spray angle, should be overlapped 1/3 between adjacent spraying swath, spray It is 75 μm to apply thickness, and spray gun between twice trend is answered orthogonal, and spray gun is moved with groined type path and carries out spraying operation；Spray The interval time for applying construction and surface preparation shortens as far as possible, should spray and finish in 2h, 8h is not to be exceeded in longest；

S4, using flame spray device in prime coat surface spraying wearing layer, spraying parameter is：Oxygen pressure 0.7MPa, 0.10 Mpa of acetylene pressure, oxygen flow 465L/min, acetylene flow is 47L/min, and 0.75 MPa of compressed air pressure is sent 60 g/min of powder amount, spray gun movement speed 3.5m/min, spray distance 210mm, spraying passage are 1, spray angle 60~ 90 °, 1/3 should be overlapped between adjacent spraying swath, coating thickness is 76 μm, and spray gun is moved with groined type path and carries out spraying operation；

S5, using high pressure airless spraying apparatus in wearing layer surface spraying confining bed, spraying parameter is：Nozzle diameter is 0.23mm, spray gun movement speed 24m/min, spray distance 350mm, spraying passage are 1,60~90 ° of spray angle, adjacent spray 1/4 should be overlapped between width, coating thickness is 45 μm.

Embodiment 5

A kind of wear-resistant erosion shield of hydraulic and hydroelectric engineering steel-slag sand comprising be sprayed at the bottoming of steel-slag sand outer surface The thickness of layer, prime coat is 80 μm, and the zinc silk using purity more than or equal to 99.99% is raw material, a diameter of 3.0mm of silk material, prime coat Include each component of following mass percent：Sn 0.0001%、Pb 0.001%、Cd 0.0004%、Cu 0.0001%、Fe 0.0007%、Zn 99.9986%；It is sprayed at the wearing layer of prime coat outer surface, the thickness of wearing layer is 80 μm, and raw material is stainless Steel alloy powder, powder size are 200 μm, include each component of following mass percent：C 0.029%、Si 0.042%、Mn 1.28%, P 0.029%, S 0.003%, Ni 13.0%, Cr 17.5%, Mo 2.9%, surplus Fe；It is sprayed at wearing layer outer surface Confining bed, the thickness of confining bed is 50 μm, and raw material is wear-resisting epoxy finish.

The spraying method of the wear-resistant erosion shield of above-mentioned hydraulic and hydroelectric engineering steel-slag sand comprising walk in detail below Suddenly：

S1, steel-slag sand surface is cleared up and be roughened using blasting treatment mode, steel-slag sand surface cleanness is made to handle into GB8923 Within the scope of 2.5 grades, roughness Rz to 100 μm of defined Sa；

S2, the floating dust that steel-slag sand surface adhesion is blown clean with compressed air；

S3, using electric arc spraying equipment in steel-slag sand surface spraying prime coat, spraying parameter is：Operating voltage 35V, work Electric current 180A, compressed air pressure 0.8MPa, wire feed rate 4m/min, spray gun movement speed 4m/min, nozzle is away from table to be sprayed The spray distance 200mm in face, spraying passage are 1,60~90 ° of spray angle, should be overlapped 1/3 between adjacent spraying swath, spraying is thick Degree is 80 μm, and spray gun between twice trend is answered orthogonal, and spray gun is moved with groined type path and carries out spraying operation；Spraying is applied The interval time of work and surface preparation shortens as far as possible, should spray and finish in 2h, 8h is not to be exceeded in longest；

S4, using flame spray device in prime coat surface spraying wearing layer, spraying parameter is：Oxygen pressure 0.8MPa, 0.12 Mpa of acetylene pressure, oxygen flow 470L/min, acetylene flow is 50L/min, and 0.8 MPa of compressed air pressure is sent 65 g/min of powder amount, spray gun movement speed 4m/min, spray distance 220mm, spraying passage are 2,60~90 ° of spray angle, 1/3 should be overlapped between adjacent spraying swath, coating thickness is 80 μm, and spray gun is moved with groined type path and carries out spraying operation；

S5, using high pressure airless spraying apparatus in wearing layer surface spraying confining bed, spraying parameter is：Nozzle diameter is 0.25mm, spray gun movement speed 24m/min, spray distance 400mm, spraying passage are 1,60~90 ° of spray angle, adjacent spray 1/4 should be overlapped between width, coating thickness is 50 μm.

The hydraulic and hydroelectric engineering steel-slag sand of wear-resistant erosion shield with the present invention, in 27 DEG C of atmospheric temperature, steel lock It is detected under the conditions of 28 DEG C of surface temperature of door, relative humidity 75%, 22 DEG C of dew point, surface roughness Rz is in 60~100 μm of models In enclosing, surface cleanness reaches Sa2.5 specified in GB8923 grades, and metal coating binding performance is qualified, and paint film adhesion is qualified.

The test agent of the steel-slag sand of the test agent of steel-slag sand in Examples 1 to 5, existing common protective coating is carried out Dry grinding plus the experiment of clear water mill, gaza's grain three kinds of operating modes of mill, each operating mode respectively grinds same number, until there is striking contrast Until effect, it is existing that testing result shows that the steel-slag sand abrasion resistant effect of the wear-resistant erosion shield with the present invention is substantially better than Common protective coating steel-slag sand abrasion resistant effect.

The steel-slag sand of steel-slag sand, existing common protective coating in Examples 1 to 5 is immersed under the conditions of 25 DEG C of temperature Concentration 50g/L ± 5g/L, density 1.025~1.040 brine in impregnate carry out preservative challenge testing, after 30 days, 60 days take out see Inspection is examined, significant change does not occur for the coating surface of the steel-slag sand in Examples 1 to 5, and the steel-slag sand of common protective coating is Through apparent corrosion phenomenon occurs.

The foregoing is merely the better embodiments of the present invention, are not intended to limit the invention, all spirit in the present invention Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.

Claims (2)

1. a kind of wear-resistant erosion shield of hydraulic and hydroelectric engineering steel-slag sand, it is characterized in that：It includes being sprayed at outside steel-slag sand The thickness of the prime coat on surface, prime coat is 60~80 μm, and the zinc silk using purity more than or equal to 99.99% is raw material, silk material diameter For 2.0~3.0mm, prime coat includes each component of following mass percent：Sn≤0.0002%、Pb≤0.0022%、Cd≤ 0.0004%、Cu≤0.0004%、Fe≤0.0009%、Zn≥99.9959%；It is sprayed at the wearing layer of prime coat outer surface, it is wear-resisting The thickness of layer is 60~80 μm, and raw material is stainless steel alloy powder, and powder size is 75~200 μm, including following quality percentage The each component of ratio：C≤0.031%, Si≤0.047%, Mn≤1.35%, P≤0.029%, S≤0.003%, Ni 10.0~14.0%, Cr16.0~18.0%, Mo 2.0~3.0%, surplus Fe；It is sprayed at the confining bed of wearing layer outer surface, the thickness of confining bed is 30~50 μm, raw material is wear-resisting epoxy finish.

2. a kind of spraying method of the wear-resistant erosion shield of hydraulic and hydroelectric engineering steel-slag sand described in claim 1, special Sign is：It includes the following steps：

S1, steel-slag sand surface is cleared up and be roughened using blasting treatment mode, steel-slag sand surface cleanness is made to handle into GB8923 Within the scope of 2.5 grades, roughness Rz to 60~100 μm of defined Sa；

S2, the floating dust that steel-slag sand surface adhesion is blown clean with compressed air；

S3, using electric arc spraying equipment in steel-slag sand surface spraying prime coat, spraying parameter is：28~35V of operating voltage, 120~180A of operating current, compressed air pressure 0.5~0.8 MPa, 2~4m/min of wire feed rate, spray gun movement speed 2~ 4m/min, 150~200mm of spray distance, spraying passage are 1~2,60~90 ° of spray angle, and 1/ is overlapped between adjacent spraying swath 3, coating thickness is 60~80 μm, and spray gun is moved with groined type path and carries out spraying operation；

S4, using flame spray device in prime coat surface spraying wearing layer, spraying parameter is：Oxygen pressure 0.3~ 0.8MPa, 0.08~0.12Mpa of acetylene pressure, oxygen flow are 400~470L/min, and acetylene flow is 40~50L/min, pressure 0.5~0.8 MPa of contracting air pressure, 40~65 g/min of powder sending quantity, spray gun 2~4m/min of movement speed, spray distance 180~ 220mm, spraying passage are 1~2,60~90 ° of spray angle, 1/3 are overlapped between adjacent spraying swath, coating thickness is 60~80 μ M, spray gun are moved with groined type path and carry out spraying operation；

S5, using high pressure airless spraying apparatus in wearing layer surface spraying confining bed, spraying parameter is：Nozzle diameter is 0.17~0.25mm, spray gun 18~24m/min of movement speed, 200~400mm of spray distance, spraying passage are 1~2, spraying 60~90 ° of angle is overlapped 1/4 between adjacent spraying swath, and coating thickness is 30~50 μm.