CN109233553A - A kind of the abrasion repair coating and restorative procedure of desulfurization slurry pump - Google Patents
A kind of the abrasion repair coating and restorative procedure of desulfurization slurry pump Download PDFInfo
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- CN109233553A CN109233553A CN201710434107.0A CN201710434107A CN109233553A CN 109233553 A CN109233553 A CN 109233553A CN 201710434107 A CN201710434107 A CN 201710434107A CN 109233553 A CN109233553 A CN 109233553A
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- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/12—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by mechanical means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/005—Repairing damaged coatings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
- B05D7/58—No clear coat specified
- B05D7/586—No clear coat specified each layer being cured, at least partially, separately
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
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- B05D2301/00—Inorganic additives or organic salts thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
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- B05D2320/00—Organic additives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2504/00—Epoxy polymers
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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Abstract
The invention discloses a kind of abrasion repair coatings of desulfurization slurry pump, the abrasion repair coating includes 4 layers, it is followed successively by priming coat, wearing layer, repair layer and finishing coat from the inside to the outside, the priming coat with a thickness of 0.1~0.3mm, the wearing layer with a thickness of 1~20mm, the repair layer with a thickness of 0.1~1mm, the finishing coat with a thickness of 0.1~0.3mm.Compared with prior art, the abrasion repair coating of desulfurization slurry of the invention pump has both excellent wear-resisting and adhesive property, and coating solidifies at room temperature, and renovation technique is simple, extends the continuous operation period of desulfurization slurry pump；Meanwhile any surface finish of abrasion repair coating is smooth, reduces hydraulic resistance, is conducive to the efficiency for improving desulfurization slurry pump.
Description
Technical field
The present invention relates to coating recovery technique fields, and in particular to a kind of coating repair materials of desulfurization slurry pump and reparation
Method.
Background technique
Desulfurization slurry pump is component part important in thermal power generation desulphurization system, including lime slurry circulating pump, lime
Slurry discharge pump, stone fluid infusion pump and flood pump etc., pumped medium is lime slurry, weakly acidic, temperature between 45~80 DEG C,
In lime slurry containing 15~20% solid particle, in 300 mesh or so, main component is calcium sulfate, carbon for the mesh number of solid particle
Sour calcium particle further includes the high hardness particles such as a small amount of silica and aluminium oxide.Silica and aluminium oxide grind for lime stone
By-product after mill is not involved in the chemical reaction for absorbing acidic flue gas, but can accumulate in cyclic process, directly to desulfurization slurry
The flow passage of pump causes to wear, during long-term operation, the destructions such as impeller surface is worn, burn into cavitates, impeller
Blade pit is formed by wear down, or even there is notch, the serious working efficiency for reducing desulfurization slurry pump.
The patent of invention of Publication No. CN1576574A discloses a kind of wear-resistant damage method for the hydraulic turbine constructed under room temperature,
This method is using epoxy glue as priming paint, and for polyurethane adhesive as finishing coat, wear-resisting principle is absorbed admittedly using the elasticity of polyurethane
The abrasive forces of body particle, to achieve the purpose that wear-resistant.But according to the product of the patent working and other similar poly- ammonia
Ester coating largely facts have proved and be not suitable for, the reason is that, polyurethane cover is at 80 DEG C when applying on desulfurization slurry pump
Lime slurry under, resistance to temperature stability is poor, in addition the acidic catalyst of lime slurry, hydrolysis of ester group reaction occurs, causes polyurethane
Coating fails fall off ahead of time.
It uses epoxy resin as adhesive, adds the abrasion resistant particles such as silicon carbide, aluminium oxide as filler, with amine curing agent
After reaction hardening, it can be formed by curing wear-resisting direct-flow powdered coating at room temperature, being proved can be with bonding repairing and protection metal
Equipment, such material construction technology is simple, is repaired by industrial equipment and field is protected to be widely applied, acid and alkali-resistance, temperature tolerance
Polyurethane material can be better than.But such healant is mainly used for repairing sewage pump, papermaking pump and irrigation pump, and desulfurization is starched
For the reparation of liquid pump, effect is undesirable always, and the service life after reparation is no more than 6 months, is unable to satisfy thermal power plant 12-18
A month row access cycle demand.
Inventor analyzes the failure case that the agent of conventional epoxy composite repair is used on desulfurization slurry pump, and discovery tradition is repaired
The content of abrasion resistant particles is less than 60% in tonic, and gluing agent content is excessive between abrasion resistant particles.Solid in lime stone slurry
Grain obtains high impact energy in the case where desulfurization slurry pumps high speed rotation power, can quickly grind off the glue between abrasion resistant particles
Glutinous agent, and then it is washed into internal adhesive layer, cause abrasion resistant particles to lose bonding basis and whole be detached from occurs.So being directed to desulfurization
The formula of the healant of slurries pump, it is necessary to the content of abrasion resistant particles in healant is improved, to increase the consistency of wear-resistant coating, from
And the speed that is washed of adhesive layer is reduced, on the other hand, the impeller high speed rotation of desulfurization slurry pump generates strong centrifugal force, it is desirable that repairs
Tonic increases adhesive to improve cohesive force, and the content of this and above-mentioned increase abrasion resistant particles forms lance to increase wear-resisting property
Shield, so overcoming above-mentioned contradiction is the main technical problem to be solved in the present invention.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of coating reparations of desulfurization slurry pump, it can solve
The problem of prior art floating coat repair materials wear-resisting property and adhesive property can not have both simultaneously, for this purpose, the present invention will also mention
For a kind of restorative procedure of desulfurization slurry pump, suitable for 4 impeller of pump, pump case, apron plate, rear backplate components.
To solve the above-mentioned problems, the invention adopts the following technical scheme:
The first aspect of the present invention, provides a kind of abrasion repair coating of desulfurization slurry pump, and the abrasion repair coating includes 4
Layer, is followed successively by priming coat, wearing layer, repair layer and finishing coat from the inside to the outside, the priming coat with a thickness of 0.1~0.3mm, institute
State wearing layer with a thickness of 1~20mm, the repair layer with a thickness of 0.1~1mm, the finishing coat with a thickness of 0.1~
0.3mm。
Preferred technical solution, the priming coat are made of primary coat host agent and primary coat curing agent, the primary coat host agent and bottom
The weight ratio for applying curing agent is (8~12): 1；The primary coat host agent includes each component of following parts by weight: bisphenol type epoxy tree
50~100 parts of rouge, 20~40 parts of alumina powder, 0~5 part of silane coupling agent, the primary coat curing agent include following parts by weight
Each component: 5~15 parts of polyamine, 2~8 parts of curing accelerator.
Preferred technical solution, the wearing layer are made of wear-resisting host agent and wear-resisting curing agent, the wear-resisting host agent with it is resistance to
The weight ratio for grinding curing agent is (8~12): 1；The wear-resisting host agent includes each component of following parts by weight: bisphenol type epoxy tree
20~70 parts of rouge, 10~40 parts of bisphenol f type epoxy resin, 300~400 parts of silicon carbide little particle, carbonization silicon fine particle 50~100
Part, 1~5 part of silicon carbide micro-powder, 0~5 part of silane coupling agent, 5~10 parts of fiber pulp, the wear-resisting curing agent includes following heavy
The each component of amount: 5~15 parts of polyamine, 2~8 parts of curing accelerator, 2 parts of fumed silica.
Preferred technical solution, the repair layer by repairing host agent and repairing curing agent form, the repairing host agent with repair
The weight ratio for mending curing agent is (4~6): 1；The repairing host agent includes each component of following parts by weight: bisphenol A type epoxy resin
50~100 parts, 100~200 parts of silicon carbide micro-powder, 0~5 part of silane coupling agent, 5 parts of fumed silica, the repairing solidification
Agent includes each component of following parts by weight: 5~15 parts of polyamine, 2~8 parts of curing accelerator, 2 parts of fumed silica.
Preferred technical solution, the finishing coat apply host agent by face and form with face painting curing agent, and the face applies host agent and face
The weight ratio for applying curing agent is (8~12): 1；The face applies each component that host agent includes following parts by weight: bisphenol type epoxy tree
50~100 parts of rouge, 60~80 parts of silicon carbide micro-powder, 2~5 parts of levelling agent, 1 part of defoaming agent, it includes following that the face, which applies curing agent,
The each component of parts by weight: 5~15 parts of polyamine, 2~8 parts of curing accelerator.
Preferred technical solution, the bisphenol A type epoxy resin and bisphenol f type epoxy resin are liquid-state epoxy resin,
Epoxide equivalent is 150~250.
Preferred technical solution, the short grained partial size of silicon carbide are 1~3mm, the fine grain partial size of silicon carbide
For 0.1~1mm, the partial size of the silicon carbide micro-powder is 0.01~0.1mm.
Preferred technical solution, the polyamine be one of diethylenetriamine, tetraethylenepentamine, m-xylene diamine or
One of several mixtures, the curing accelerator are 2-ethyl-4-methylimidazole, 2-(dimethylamino methyl) phenol.
The second aspect of the present invention provides a kind of restorative procedure that the desulfurization slurry using above-mentioned abrasion repair coating pumps,
The following steps are included:
Step 1: the complex surface to be repaired to water pump carries out blasting treatment, the surface roughness after sandblasting is 60 μm~100 μm；
Step 2: cleaning the greasy dirt and impurity of complex surface to be repaired with acetone or dimethylbenzene, after cleaning, carried out with dry air
Purging, until the acetone of complex surface to be repaired or dimethylbenzene volatilization are clean；
Step 3: forming abrasion repair coating in complex surface to be repaired successively coating base coat, wearing layer, repair layer, finishing coat.
Step 4: the abrasion repair coating that step 3 obtains is stood 16 hours at room temperature, until abrasion repair coating is solid
Change complete.
Preferred technical solution, it is wear-resisting in applying coating rubbing-layer in 2 hours in the step 2 after the completion of primer-layer-coated
After the completion of layer coating, 3~4 hours are stood at room temperature, until wearing layer primary solidification, coats repair layer, after the completion of repair layer coating,
2~3 hours are stood at room temperature, until repair layer primary solidification, coats finishing coat.
Preferred technical solution, further comprising the steps of before the step 1 when remanufactured component is impeller: for
Impeller blade defect width is greater than the region 20mm, welds rod iron as boundary support column, welding manner is spot welding, and solder joint is in rod iron
Both ends and blade contact point, the rod iron diameter is in 3 ~ 5mm.It welds expanded steel diamond mesh and fills blade defect area, welding side
Formula is spot welding, solder joint the expanded metal lath periphery and blade breakage and with the conplane contact point of the rod iron.The steel
Diamond hole the diagonal distance 30mm ~ 40mm, 2 ~ 3mm of thickness of expanded metals.
Preferred technical solution, when remanufactured component is apron plate, rear backplate, priming coat in the step 4 and resistance to
It after grinding layer, needs to do mating surface accurate machining, be processed using PCD man made diamond tool, processing cutting speed is 20m/
Min ~ 30m/min, cutting depth are 0.2mm ~ 5mm, and the amount of feeding is 0.5mm/r ~ 1mm/r.Surface after processing is very smooth,
Repair layer and finishing coat omission in the step 4 are not done.
In the present invention, in priming coat for bonding bisphenol A type epoxy resin content it is higher, improve priming coat with to
The bond strength on surface is repaired, alumina powder is conducive to be promoted the temperature tolerance and mechanical strength of priming coat；Silicon carbide in wearing layer
Content be greater than 80%, the partial size of silicon carbide is in gradation distribution so that the compactness of wearing layer further increases, abrasion resistance properties
Enhancing, it is demonstrated experimentally that the composite mill layer within primer-layer-coated 2 hours, the layer after being fully cured, between wearing layer and priming coat
Between adhesive strength be 12~18MPa, be more than the adhesive strength between priming coat and complex surface to be repaired, solve adhesive property with
Between wear-resisting property can not simultaneously both with contradiction；Silicon carbide in repair layer exists in the form of silicon carbide micro-powder, criticizes and is overlying on
The surface of repair layer and scrape smooth out it is whole, be conducive in conjunction with finishing coat more closely；Silicon carbide in finishing coat is with silicon carbide
The form of micro mist exists, and in finishing coat silicon carbide micro-powder partial size more compared to partial size for silicon carbide micro-powder in repair layer
It is small.The levelling agent of finishing coat has self-leveling energy, so that the finishing coat any surface finish after solidifying is smooth, having reduces waterpower resistance
Power is conducive to the function of improving the desulfurization slurry efficiency of pump.
Compared with prior art, the abrasion repair coating of desulfurization slurry of the invention pump has both excellent wear-resisting and caking property
Can, coating solidifies at room temperature, and renovation technique is simple, the continuous operation period of desulfurization slurry pump is extended, meanwhile, abrasion repair
Any surface finish of coating is smooth, reduces hydraulic resistance, improves the desulfurization slurry efficiency of pump.
Detailed description of the invention
Invention is further described in detail with specific embodiment with reference to the accompanying drawing.
Fig. 1 is the structural schematic diagram of abrasion repair coating of the present invention；
Fig. 2 is the structural schematic diagram of impeller repair process in the embodiment of the present invention 1.
Wherein, appended drawing reference is described as follows: priming coat 1, wearing layer 2, repair layer 3, finishing coat 4, blade breakage 5,
Rod iron 6, repairs rear blade 8 at expanded steel diamond mesh 7.
Specific embodiment
Embodiment 1
The impeller reparation of desulfurization slurry pump
Impeller pre-treatment: the region 20mm is greater than for 5 defect width of blade breakage, welding rod iron 6 is used as boundary support column, welding
Mode is spot welding, and both ends and blade contact point of the solder joint in rod iron 6,6 diameter of rod iron is in 3mm.
It welds expanded steel diamond mesh 7 and fills blade defect area, welding manner is spot welding, and solder joint is on 7 periphery of expanded metal lath
With blade breakage 5 and with the conplane contact point of the rod iron 6.The diamond hole diagonal distance 40mm of the expanded metal lath 7,
Thickness 2mm.
The effect of above-mentioned rod iron 6 and expanded steel diamond mesh 7 is to construct to depend on for reparation material in blade defect area
Skeleton.
The reparation of impeller:
Step 1: carrying out blasting treatment to surface to be repaired, surface roughness to be repaired is 60 ~ 100 μm after sandblasting, the spray of use
Sand material material is corundum sand, and mesh number is 12 mesh, sandblasting be oil removing, be dry with compressed air after pure air, compressed air
Pressure is 6Bar.
Step 2: cleaning blade breakage 5 to be repaired, rod iron 6, expanded steel diamond mesh 7 with acetone, wiped after cleaning with calico
It wipes, is cleaned repeatedly to spot is visible by naked eyes on calico, purge complex surface to be repaired with dry air after the completion of cleaning, until acetone
Volatilization completely.
Step 3: it is even to weigh 800g bisphenol A type epoxy resin, 300g alumina powder (average grain diameter is 5 μm), 30g silane
Join agent, obtains priming coat host agent after mixing；Weigh 100g polyamine (diethylenetriamine), 50g curing accelerator (2- second
Base -4-methylimidazole), priming coat curing agent is obtained after mixing；It weighs 1000g priming coat host agent and 100g priming coat solidifies
Agent, after mixing, above blade breakage 5 to be repaired, rod iron 6, expanded steel diamond mesh 7 coated on impeller, normal temperature cure 1 is small
When, form priming coat 1, average thickness 0.2mm；
Weighing 400g bisphenol A type epoxy resin, 200g bisphenol f type epoxy resin, 3000g silicon carbide little particle, (average grain diameter is
2mm), 800g carbonization silicon fine particle (average grain diameter 0.5mm), 20g silicon carbide micro-powder (average grain diameter 0.03mm), 20g silicon
Alkane coupling agent, 80g fiber pulp (Kevlar), obtain wearing layer host agent after mixing；Weigh 100g polyamine (four ethylene five
Amine), 50g curing accelerator (2-(dimethylamino methyl) phenol), 20g fumed silica, obtain wearing layer after mixing
Curing agent；1500g wearing layer host agent and 150g wearing layer curing agent are weighed, after mixing, the surface coated on priming coat 1,
Wearing layer 2 is formed, wearing layer 2 coats blade breakage 5, rod iron 6 and expanded metal lath 7, forms wearing layer 2, is struck off with putty knife wear-resisting
Layer 2 surface, wearing layer 2 be higher by blade breakage 5, expanded metal lath 7 tow sides average thickness be 3mm；Solidification 3 is stood under room temperature
Hour.
It is silane coupled to weigh 500g bisphenol A type epoxy resin, 1500g silicon carbide micro-powder (average grain diameter 0.05mm), 30g
Agent, 50g fumed silica, obtain repair layer host agent after mixing；It is solid to weigh 150g polyamine (m-xylene diamine), 50g
Change promotor (2-(dimethylamino methyl) phenol), 20g fumed silica, obtain repair layer curing agent after mixing；Claim
500g repair layer host agent, 100g repair layer curing agent are taken, after mixing, the surface coated on wearing layer 2 solidifies 2 hours, shape
At repair layer 3, the average thickness of repair layer 3 is 1mm；
Weigh 500g bisphenol A type epoxy resin, 700g silicon carbide micro-powder (average grain diameter 0.02mm), 30g levelling agent (poly- methyl
Propionic ester), 10g defoaming agent (dimethyl polysiloxane), obtain finishing coat host agent after mixing；Weigh 150g polyamine (
Benzene dimethylamine), 50g curing accelerator (2-ethyl-4-methylimidazole), obtain finishing coat curing agent after mixing, weigh
1000g finishing coat host agent and 100g finishing coat curing agent, after mixing, the surface coated on repair layer 3 solidifies 2 hours, obtains
To finishing coat 4, the average thickness of finishing coat 4 is 0.2mm.
Step 4: the abrasion repair coating that step 3 obtains is stood 16 hours at room temperature, until abrasion repair coating is complete
All solidstate.It then obtains repairing rear blade 8.
Embodiment 2
The reparation of the pump case of desulfurization slurry pump
Step 1: carrying out blasting treatment to surface to be repaired, surface roughness to be repaired is 60 ~ 100 μm after sandblasting, the spray of use
Sand material material is white fused alumina sand, and mesh number is 8 mesh, sandblasting be oil removing, be dry with compressed air after pure air, the pressure of compressed air
Power is 7Bar.
Step 2: cleaning complex surface to be repaired with dimethylbenzene, wiped after cleaning with calico, clean repeatedly on calico without naked eyes
Visible spots purge complex surface to be repaired with dry air after the completion of cleaning, until dimethylbenzene volatilizees completely.
Step 3: it is even to weigh 1000g bisphenol A type epoxy resin, 200g alumina powder (average grain diameter is 5 μm), 50g silane
Join agent, obtains priming coat host agent after mixing；Weigh 50g polyamine (diethylenetriamine), 80g curing accelerator (2- ethyl-
4-methylimidazole), priming coat curing agent is obtained after mixing；1000g priming coat host agent and 120g priming coat curing agent are weighed,
After mixing, coated on the surface to pump case, solidify 1 hour, form priming coat 1, the average thickness of priming coat 1 is 0.2mm；
Weighing 700g bisphenol A type epoxy resin, 100g bisphenol f type epoxy resin, 4000g silicon carbide little particle, (average grain diameter is
2mm), 500g silicon carbide little particle (average grain diameter 0.5mm), 50g silicon carbide micro-powder (average grain diameter 0.03mm), 50g
Silane coupling agent, 50g fiber pulp (Kevlar), obtain wearing layer host agent after mixing；Weigh 50g polyamine (isophthalic two
Methylamine), 80g curing accelerator (2-(dimethylamino methyl) phenol), 20g fumed silica, obtain after mixing wear-resisting
Layer curing agent；Weigh 1500g wearing layer host agent and 180g wearing layer curing agent, after mixing, the surface coated on priming coat 1
And expanded metal lath is coated, wearing layer 2 is formed, strikes off 2 surface of wearing layer with putty knife, wearing layer 2 is higher by the mean height for repairing surface
Degree is 5mm；Solidification 3 hours are stood under room temperature.
It is silane coupled to weigh 500g bisphenol A type epoxy resin, 2000g silicon carbide micro-powder (average grain diameter 0.05mm), 50g
Agent, 50g fumed silica, obtain repair layer host agent after mixing；Weigh 50g polyamine (m-xylene diamine), 50g solidification
Promotor (2-(dimethylamino methyl) phenol), 20g fumed silica, obtain repair layer curing agent after mixing；It weighs
500g repair layer host agent and 100g repair layer curing agent, after mixing, the surface coated on wearing layer 2 solidifies 2 hours, shape
At repair layer 3, the average thickness of repair layer 3 is 0.8mm；
Weigh 500g bisphenol A type epoxy resin, 600g silicon carbide micro-powder (partial size 0.03mm), 50g levelling agent (poly- methylpropanoic acid
Ester), 10g defoaming agent (dimethyl polysiloxane), obtain finishing coat host agent after mixing；Weigh 150g polyamine (isophthalic two
Methylamine), 20g curing accelerator (2-ethyl-4-methylimidazole), obtain finishing coat curing agent after mixing, weigh the face 1000g
Host agent and 120g finishing coat curing agent are applied, after mixing, the surface coated on repair layer 3 solidifies 2 hours, obtains finishing coat
4, the average thickness of finishing coat 4 is 0.2mm.
Step 4: the abrasion repair coating that step 3 obtains is stood 16 hours at room temperature, until abrasion repair coating is complete
All solidstate.
Embodiment 3
The apron plate of desulfurization slurry pump, rear backplate reparation
Step 1: carrying out blasting treatment to surface to be repaired, surface roughness to be repaired is 60 ~ 80 μm after sandblasting, the spray of use
Sand material material is white fused alumina sand, and mesh number is 8 mesh, sandblasting be oil removing, be dry with compressed air after pure air, the pressure of compressed air
Power is 7Bar.
Step 2: cleaning complex surface to be repaired with dimethylbenzene, wiped after cleaning with calico, clean repeatedly on calico without naked eyes
Visible spots purge complex surface to be repaired with dry air after the completion of cleaning, until dimethylbenzene volatilizees completely.
Step 3: weighing 500g bisphenol A type epoxy resin, 400g alumina powder (average grain diameter is 5 μm), after mixing
Obtain priming coat host agent；150g polyamine (m-xylene diamine), 20g curing accelerator (2-ethyl-4-methylimidazole) are weighed, is mixed
Priming coat curing agent is obtained after closing uniformly；800g priming coat host agent and 100g priming coat curing agent are weighed, after mixing, coating
In complex surface to be repaired, solidify 1 hour, form priming coat 1, priming coat 1 with a thickness of 0.1mm；
Weighing 200g bisphenol A type epoxy resin, 400g bisphenol f type epoxy resin, 3500g silicon carbide little particle, (average grain diameter is
2mm), 1000g silicon carbide little particle (average grain diameter is 0. 5mm), 10g silicon carbide micro-powder (average grain diameter 0.03mm), 10g
Silane coupling agent, 100g fiber pulp (Kevlar), obtain wearing layer host agent after mixing；Weigh 150g polyamine (isophthalic
Dimethylamine), 20g curing accelerator (2-(dimethylamino methyl) phenol), 20g fumed silica, obtain after mixing resistance to
Grind layer curing agent；Weigh 1500g wearing layer host agent and 150g wearing layer curing agent, after mixing, the table coated on priming coat
Face solidification 16 hours or more, forms the wearing layer 2 being fully cured；
In the thickness coating procedure of above-mentioned wearing layer 2, the thickness of accumulation has more average 2mm than standard fit dimension face, as
Machining allowance.
It after above-mentioned wearing layer 2 is fully cured, needs to do mating surface accurate machining, removes the processing of above-mentioned average 2mm
Surplus.It is processed using PCD man made diamond tool, processing cutting speed is 20m/min, cutting depth 2mm, and the amount of feeding is
0.5mm/r.Surface after completion of processing is very smooth, so the repair layer 3 and the omission of finishing coat 4 in step 3 are not done.
Use above specific case is illustrated the present invention, is merely used to help understand the present invention, not to limit
The system present invention.For those skilled in the art, according to the thought of the present invention, can also make several simple
It deduces, deform or replaces.
Claims (9)
1. a kind of abrasion repair coating of desulfurization slurry pump, which is characterized in that the abrasion repair coating includes 4 layers, by it is interior extremely
Be followed successively by priming coat, wearing layer, repair layer and finishing coat outside, the priming coat with a thickness of 0.1~0.3mm, the wearing layer
With a thickness of 1~20mm, the repair layer with a thickness of 0.1~1mm, the finishing coat with a thickness of 0.1~0.3mm.
2. a kind of abrasion repair coating of desulfurization slurry pump as described in claim 1, it is characterised in that: the priming coat is the bottom of by
It applies host agent and primary coat curing agent forms, the weight ratio of the primary coat host agent and primary coat curing agent is (8~12): 1；The primary coat master
Agent includes each component of following parts by weight: 50~100 parts of bisphenol A type epoxy resin, 20~40 parts of alumina powder, silane coupling agent
0~5 part, the primary coat curing agent includes each component of following parts by weight: 5~15 parts of polyamine, 2~8 parts of curing accelerator.
3. a kind of abrasion repair coating of desulfurization slurry pump as described in claim 1, it is characterised in that: the wearing layer is by resistance to
It grinds host agent and wear-resisting curing agent forms, the weight ratio of the wear-resisting host agent and wear-resisting curing agent is (8~12): 1；The wear-resisting master
Agent includes each component of following parts by weight: 20~70 parts of bisphenol A type epoxy resin, 10~40 parts of bisphenol f type epoxy resin, carbonization
300~400 parts of silicon little particle, 50~100 parts of silicon fine particle of carbonization, 1~5 part of silicon carbide micro-powder, 0~5 part of silane coupling agent, fibre
5~10 parts of pulp of dimension, the wear-resisting curing agent includes each component of following weight: 5~15 parts of polyamine, curing accelerator 2~8
Part, 2 parts of fumed silica.
4. a kind of abrasion repair coating of desulfurization slurry pump as described in claim 1, it is characterised in that: the repair layer is by repairing
Host agent and repairing curing agent composition are mended, the repairing host agent and the weight ratio for repairing curing agent are (4~6): 1；The repairing master
Agent includes each component of following parts by weight: 50~100 parts of bisphenol A type epoxy resin, 100~200 parts of silicon carbide micro-powder, silane are even
Join 0~5 part of agent, 5 parts of fumed silica, the repairing curing agent includes each component of following parts by weight: polyamine 5~15
Part, 2~8 parts of curing accelerator, 2 parts of fumed silica.
5. a kind of abrasion repair coating of desulfurization slurry pump as described in claim 1, it is characterised in that: the finishing coat is by face
It applies host agent and face applies curing agent composition, the weight ratio that the face painting host agent and face apply curing agent is (8~12): 1；The face applies master
Agent includes each component of following parts by weight: 50~100 parts of bisphenol A type epoxy resin, 60~80 parts of silicon carbide micro-powder, levelling agent 2
~5 parts, 1 part of defoaming agent, the face apply each component that curing agent includes following parts by weight: 5~15 parts of polyamine, curing accelerator
2~8 parts.
6. a kind of restorative procedure of desulfurization slurry pump, special using the described in any item abrasion repair coatings of Claims 1 to 5
Sign is, comprising the following steps:
Step 1: the complex surface to be repaired to water pump carries out blasting treatment, the surface roughness after sandblasting is 60 μm~100 μm；
Step 2: cleaning the greasy dirt and impurity of complex surface to be repaired with acetone or dimethylbenzene, after cleaning, carried out with dry air
Purging, until the acetone of complex surface to be repaired or dimethylbenzene volatilization are clean；
Step 3: forming abrasion repair coating in complex surface to be repaired successively coating base coat, wearing layer, repair layer, finishing coat.
Step 4: the abrasion repair coating that step 3 obtains is stood 16 hours at room temperature, until abrasion repair curing of coatings is complete
Entirely.
7. a kind of restorative procedure of desulfurization slurry pump as claimed in claim 6, it is characterised in that: priming coat in the step 2
After the completion of coating, 3~4 hours are stood at room temperature, until wear-resisting in applying coating rubbing-layer in 2 hours after the completion of the wearing layer coating
Layer primary solidification coats repair layer and 2~3 hours is stood at room temperature, until repair layer is tentatively solid after the completion of the repair layer coating
Change, coats finishing coat.
8. a kind of restorative procedure of desulfurization slurry pump as claimed in claim 6, it is characterised in that: before the step 1, also
The following steps are included: being greater than the complex surface to be repaired of 20mm for defect width, rod iron is welded as boundary support column, welding manner
For spot welding, the rod iron diameter is 3~5mm, and expanded steel diamond mesh is welded between rod iron and complex surface to be repaired and fills defect area,
Welding manner is spot welding, diamond hole the diagonal distance 30mm~40mm, 2~3mm of thickness of the expanded metal lath.
9. a kind of restorative procedure of desulfurization slurry pump as claimed in claim 6, it is characterised in that: in remanufactured component be preceding shield
When plate, rear backplate, after the step 4, accurate machining is done to mating surface, machining tool is man made diamond tool, is added
Work cutting speed is 20m/min~30m/min, and cutting depth is 0.2mm~5mm, and the amount of feeding is 0.5mm/r~1mm/r.
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| CN201710434107.0A CN109233553B (en) | 2017-06-09 | 2017-06-09 | Wear-resistant repair coating and repair method for desulfurization slurry pump |
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| CN201710434107.0A CN109233553B (en) | 2017-06-09 | 2017-06-09 | Wear-resistant repair coating and repair method for desulfurization slurry pump |
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| CN110539125A (en) * | 2019-09-03 | 2019-12-06 | 齐齐哈尔众工科技有限公司 | method for repairing slurry circulating pump |
| CN112059544A (en) * | 2020-08-26 | 2020-12-11 | 王立民 | Energy-saving modification method for water pump |
| CN112920681A (en) * | 2021-01-30 | 2021-06-08 | 常熟市中电机械设备有限公司 | Epoxy resin-based polymer repair material |
| CN112961581A (en) * | 2021-01-30 | 2021-06-15 | 常熟市中电机械设备有限公司 | Method for repairing metal surface damage without damage |
| CN113150643A (en) * | 2021-03-25 | 2021-07-23 | 青岛维洁仕环保科技服务有限公司 | Polymer composite repair material for circulating water pump and repair method thereof |
| CN114226206A (en) * | 2021-12-22 | 2022-03-25 | 淄博索雷工业设备维护技术有限公司 | Method for rapidly repairing pump shell corrosion erosion of desulphurization pump on site |
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| CN109233553B (en) | 2021-05-25 |
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