CN103436867A - Wear-resistant corrosion-resistant Ni-P/TiAlN gradient coating and preparation method thereof - Google Patents
Wear-resistant corrosion-resistant Ni-P/TiAlN gradient coating and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a wear-resistant corrosion-resistant Ni-P/TiAlN gradient coating and a preparation method thereof, and belongs to the field of surface coating preparation technology. The wear-resistant corrosion-resistant Ni-P/TiAlN gradient coating comprises following ingredients, by mass: 80 to 84% of Ni, 9 to 12% of P and 1 to 10% of TiAlN. TiAlN is distributed in the Ni-P/TiAlN gradient coating in a gradient manner; and the concentration of TiAlN is decreased gradually along the direction vertical to the interface of a substrate and the Ni-P/TiAlN gradient coating. The preparation method comprises following steps: nano TiAlN powder is modified by coating with Ni, and is subjected to chemical composite plating so that codeposition of the modified nano TiAlN powder coated with Ni and Ni-P alloy on the surface of a scraper is realized; at the same time, the content of the nano TiAlN powder coated with Ni in a plating solution is adjusted and controlled so as to realize gradient distribution of TiAlN hard particles in the Ni-P coating. Binding force between the Ni-P/TiAlN gradient coating and the substrate is increased, and wear resistance of the Ni-P/TiAlN gradient coating is improved greatly. In a subsequent processing step, the Ni-P/TiAlN gradient coating is subjected to SiO2 sol sealing and heat treatment so as to increase bonding strength of the Ni-P/TiAlN gradient coating and the substrate, and further improve performances of the Ni-P/TiAlN gradient coating. The preparation method is simple, the performances of the Ni-P/TiAlN gradient coating are excellent, and the Ni-P/TiAlN gradient coating is suitable for industrialized production.
Description
Technical field
The present invention relates to a kind of wear-resisting erosion resistance coating and preparation method thereof, particularly a kind of wear-resisting erosion resistance Ni-P/TiAlN gradient coating and preparation method thereof; Belong to the top coat preparing technical field.
Background technology
Chemical nickel plating is not subject to the impact of plating piece shape, instrument piece surface energy uniform deposition at various complicated shapes. the physicalies such as this homogeneity and its uniform electric heating, improve electronic reliability, made chemical nickel plating be able to widespread use on electronic industry.In computer production at present, the overwhelming majority such as hard disk, driving mechanism, floppy disk, CD, printer drum all adopt chemical nickel plating.Chemical nickel plating also has the excellent properties combination of wear-and corrosion-resistant, at part, oil production refining unit and each faces of each side such as petrochemical complex instrument and military small-arms of part, axle and the cylinder class of manufacturing the medicine equipments such as scalpel and stapler, aerospace craft engine, plays an important role.Nowadays, automotive industry also replaces hard chrome and the easy-abrasion parts such as decorative chromium manufacture engine cylinder, piston with chemical nickel plating gradually.
In the nickel-phosphorus alloy chemical plating fluid, admixture second-phase particulate matter carries out Ni-P, utilizes the character of nickel-phosphorus alloy and particulate matter to carry out complementary combinations, reaches the purpose that forms composite deposite, improves coating character.At present, Ni-P adopts solia particles such as adding inorganic solid lubricant, rare earth oxide and ceramic particle more, realizes the codeposition of itself and nickel-phosphorus alloy, can obtain the nickel-phosphorus alloy coating of tissue or excellent property.Yet the poor bonding strength between coating and steel matrix, be prone to and peel off, grievous injury the work-ing life of material.TiAlN has high-melting-point and extreme hardness (2800HV), can match in excellence or beauty with diamond, can significantly improve the nickel-phosphorus alloy coating properties of antifriction and wear resistance.Yet, between insoluble TiAlN particulate and matrix metal, interface wet ability is poor, cause adhesive property between the two poor, and by changing the distribution of nickel-phosphorus coating solid particulate, gradient-structure is set, can significantly improve the bond quality of coating and scraper, extend the work-ing life of nickel-phosphorus alloy coating.
The traditional chemical Composite Coatings, because the bond of second-phase insoluble particle and alloy is closed difference, interface wet ability can be poor, causes the second-phase insoluble particle easily to come off, this grievous injury the cladding wearability energy; On the other hand, the second-phase insoluble particle is combined poor with alloy base material, reduces the work-ing life of coating.At present, also there is no to find the bibliographical information about the Ni-P/TiAlN gradient coating.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, a kind of wear-resisting erosion resistance Ni-P/TiAlN gradient coating and preparation method thereof is provided.
A kind of wear-resisting erosion resistance Ni-P/TiAlN gradient coating of the present invention comprises following component by percentage to the quality:
Ni80-84%；
P?9-12%；
TiAlN?1-10%；
TiAlN is distribution gradient in coating; The concentration of TiAlN is along successively decreasing perpendicular to the direction of matrix and coating interface.
The method of a kind of wear-resisting erosion resistance Ni-P/TiAlN gradient coating of the present invention,
To through the base material of surface preparation, immerse in plating solution, first at the thick nickel-phosphorus alloy of substrate surface plating one deck 5-10 μ m, then add modified Nano TiAlN powder in plating solution, controlling the starting point concentration of modified Nano TiAlN powder in plating solution is 1-15g/L, after every plating 10-30min, add modified Nano TiAlN powder, make the concentration of modification TiAlN powder improve 1-5g/L, until obtain having the plating piece of desired thickness coating; Prolongation by the concentration of control nano-TiAl N powder in plating solution with plating time raises, and realizes that the concentration gradient of TiAlN in nickel-phosphorus coating distributes;
Described plating solution comprises following component in mass concentration: single nickel salt 25-30g/L, inferior sodium phosphate 35-44g/L, sodium-acetate 12-18g/L, lactic acid 21.5-26.6g/L, citric acid 7.5-10.5g/L, thiocarbamide 3-6mg/L;
Described modified Nano TiAlN powder is the TiAlN powder that is coated with nickel, and the coating thickness of nickel is 2-3 μ m;
During plating, loading capacity is 0.8-1.2dm
2/ L, temperature is 85-95 ℃, the pH value is 4.8-5.1; The total time of plating is 60-180min.
The method of a kind of wear-resisting erosion resistance Ni-P/TiAlN gradient coating of the present invention, the plating piece that will have desired thickness coating immerses SiO
2colloidal sol 1-5min, make its fully wetting Ni-P/TiAlN coating surface, takes out plating piece, after 25-40 ℃ of leeward dry-cure 12-36h, at 280-320 ℃ of constant temp. heating, processes 15-30min, obtains the plating piece that sealing of hole is processed.
The method of a kind of wear-resisting erosion resistance Ni-P/TiAlN gradient coating of the present invention, the plating piece after sealing of hole is processed is warming up to 400-420 ℃ with speed 2-5 ℃/min, after constant temperature is processed 0.5h-1.5h, takes out the sample air cooling, obtains finished product.
The method of a kind of wear-resisting erosion resistance Ni-P/TiAlN gradient coating of the present invention, described base material is ink knife.
The method of a kind of wear-resisting erosion resistance Ni-P/TiAlN gradient coating of the present invention, substrate surface treatment is that base material is carried out to oil removing, rust cleaning, activation treatment;
Oil removing is soaked realization by alkali, and oil removing alkali lye used comprises in mass concentration: 48-52g/L NaOH, 4-6g/L NaSiO
3, 28-32g/L NaCO
3, the temperature that alkali soaks is 70-85 ℃, the time that alkali soaks is 30-60min; Alkali soaks the rear washed with de-ionized water of using;
Rust cleaning realizes by acidleach, the HCl that the acid solution used that eliminates rust is 15-20v%, and the time of acidleach is 20-60s, uses washed with de-ionized water after acidleach;
Activation is the base material of oil removing, rust cleaning to be put into to the HCl that concentration is 5-10v% soak 8-15s; Base material after activation is rinsed well with deionized water, to be plated.
The method of a kind of wear-resisting erosion resistance Ni-P/TiAlN gradient coating of the present invention, by following step, prepared by described modified Nano TiAlN powder:
The step 1 alligatoring
Nano-TiAl N powder is immersed to the NH that concentration is 8-12wt%
4in F solution, after at room temperature electromagnetic force stirs 20-30min, centrifugation;
The step 2 sensitization
Powder after alligatoring is placed on to 10-11g/L SnCl
2in 4-5g/L HCl solution, under room temperature, electromagnetic force stirs 3-8min, centrifugation;
The step 3 activation
Powder after sensitization is placed on to 0.4-0.6g/L PdC
l2in 20-22ml/L HCl activation solution, under room temperature, electromagnetic force stirs 3-8min, centrifugation post-drying;
Step 4 coats
Powder after activation is put into to modification liquid and coated, obtain being coated with the TiAlN powder of the thick nickel dam of 2-3 μ m; Described modification liquid comprises following component in mass concentration: single nickel salt 25-30g/L, hydrazine hydrate 82.5-134.5g/L, sodium tartrate 15-20g/L, EDETATE SODIUM 7-9.1g/L; During modification, loading capacity is 4.0-15g/L, and the pH value of modification liquid is that 11-12, temperature are 85-95 ℃.
Principle and advantage
One aspect of the present invention is coated the nickel modification to superhard TiAlN particle, improves interface wet ability and makes the TiAlN particle incrust; The present invention is by base material after preplating Ni-P on the other hand, make TiAlN distribution gradient in subsequent plating layer, effectively solved between TiAlN and metal wettability difference large, the difficult problem that adhesive property is poor, improve the bonding strength between nickel-phosphorus composite deposit and matrix, extended the materials'use life-span.By follow-up SiO
2colloidal sol sealing of hole and thermal treatment process, filled and organized hole, strengthened surface hardness, thereby obtained the wear-resisting erosion resistance Ni-P/TiAlN composite graded coating with excellent properties.
Component of the present invention is reasonable, preparation technology is simple, the bond effectively overcome between the metallic bond of the covalent linkage of TiAlN and base material is closed difference, improved the adhesive property between TiAlN and base material, TiAlN particle difficult drop-off, surface hardness and wear resisting property are all excellent, be suitable for suitability for industrialized production, expanded its Application Areas.
Accompanying drawing:
Accompanying drawing 1 is Ni-P/TiAlN gradient coating chemical plating technology schema.
The Ni-P/TiAlN gradient coating worn surface figure that accompanying drawing 2 is embodiment 1 preparation.
The Ni-P/TiAlN gradient coating worn surface figure that accompanying drawing 3 is embodiment 2 preparations.
The Ni-P/TiAlN gradient coating worn surface figure that accompanying drawing 4 is embodiment 3 preparations.
Ni-P coating surface wear morphology figure prepared for Comparative Examples by accompanying drawing 5.
The polishing scratch width is narrow as can be seen from Figure 2, weares and teares lighter, and base material does not grind surface, and after comparison diagram 2, Fig. 5 can go out admixture nano-TiAl N, the coating polishing machine is significantly improved.
The polishing scratch width is narrow as can be seen from Figure 3, weares and teares lighter, and base material does not grind surface, and after comparison diagram 3, Fig. 5 can go out admixture nano-TiAl N, the coating polishing machine is significantly improved.
The polishing scratch width is narrow as can be seen from Figure 4, weares and teares lighter, and base material does not grind surface, and after comparison diagram 4, Fig. 5 can go out admixture nano-TiAl N, the coating polishing machine is significantly improved.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail, and wherein wearing test be take the 30Cr steel as to the mill material, and hardness is 60HRC, and the 30min that weares and teares under the 30N plus load obtains the friction factor of sample; The bonding force experiment adopts the stretched vertically method to measure; Electrochemistry experiment is preset in sample in the NaCl solution of 3.5wt% after corrosion 2d, adopts electrochemical workstation, the electrochemical parameter of measure sample in the NaCl of 3.5wt% solution.Following embodiment is used for explaining the present invention, rather than limits the invention, and in spirit of the present invention and claim protection domain, any modification or change that the present invention is made, all fall into protection scope of the present invention.
Embodiment 1
Scraper matrix surface pre-treatment: the scraper matrix is immersed to alkali lye, alkali lye component: 50g/L NaOH, 5g/LNaSiO
3, 30g/L NaCO
3, oil removing temperature 70 C, oil removing time 60min; Washed with de-ionized water; Matrix is immersed to 15v%HCl rust cleaning 20s, activate about 8s after distilled water flushing in 5v%HCl, to be plated after deionized water rinsing; The TiAlN surface modification: the TiAlN powder is through the NH of 10wt%
4f solution alligatoring 20min, 10g/LSnCl
2with sensitization 3min in 4g/L HCl solution and at 0.5g/L PdC
l2after activation 3min in 22ml/L HCl activation solution, centrifugation is dried, and inserts modification liquid and carries out the nickel coating, and the modification liquid component is: single nickel salt 25g/L, hydrazine hydrate 82.56g/L, sodium tartrate 15g/L, EDETATE SODIUM 7.07g/L.Wherein, pH=11,85 ℃ of temperature, loading capacity 4.0g/L, obtain the nickel dam that 2-3 μ m is thick and coat the TiAlN powder; Preparation chemical nickel plating phosphor bath, bath composition is single nickel salt 25g/L, inferior sodium phosphate 35g/L, sodium-acetate 12g/L, lactic acid 21.6g/L, citric acid 7.5g/L, thiocarbamide 3mg/L, adopts weak acid or weak base to adjust plating solution pH=4.8; By blade surface preplating Ni-P alloy 10min to be plated, 90 ℃ of plating temperatures; Add 3g/L modification TiAlN in plating solution, 90 ℃ of plating temperatures, plating time 20min; On the basis of previous step, improve modification TiAlN concentration value to 6g/L, 90 ℃ of plating temperatures, improve modification TiAlN concentration value again to 9g/L after plating time 20min, 90 ℃ of plating temperatures, plating time 20min, obtain the Ni-P/TiAlN gradient coating; Continue induction stirring in the electroless plating process, keep the plating solution homogeneity.The Ni-P/TiAlN coating sample of preparation is immersed to SiO
2after colloidal sol 1min, at 25 ℃ of air-dry processing 36h, then at 280 ℃ of constant temperature, process 30min, take out air cooling; Finally sample is warming up to 400 ℃ with the temperature rise rate of 2 ℃/min, constant temperature is processed 1.5h, takes out air cooling, makes final coating sample.
The Ni-P/TiAlN coating sample obtained is carried out to rub(bing)test, tension test and electrochemistry experiment, and as shown in Figure 2, the coating rubbing factor is 0.5140 to the sample wear morphology, and bonding force is 135MPa, and electrochemical parameter is as shown in table 1.
Embodiment 2
Scraper matrix surface pre-treatment: the scraper matrix is immersed to alkali lye, alkali lye component: 50g/L NaOH, 5g/LNaSiO
3, 30g/L NaCO
3, except 80 ℃ of oil temperatures, oil removing time 45min; Washed with de-ionized water; Matrix is immersed to 15v%HCl rust cleaning 40s, activate about 10s after distilled water flushing in 5v%HCl, to be plated after deionized water rinsing; The TiAlN surface modification: the TiAlN powder is through the NH of 10wt%
4f solution alligatoring 25min, 10g/LSnCl
2with sensitization 5min in 4g/L HCl solution and at 0.5g/L PdC
l2after activation 5min in 22ml/L HCl activation solution, centrifugation is dried, and inserts modification liquid and carries out the nickel coating, and the modification liquid component is: single nickel salt 28g/L, hydrazine hydrate 103.2g/L, sodium tartrate 18g/L, EDETATE SODIUM 8.08g/L.Wherein, pH=11.5,90 ℃ of temperature, loading capacity 10g/L, obtain the nickel dam that 2-3 μ m is thick and coat the TiAlN powder; Preparation chemical nickel plating phosphor bath, bath composition is single nickel salt 27.5g/L, inferior sodium phosphate 38.5g/L, sodium-acetate 15g/L, lactic acid 24.12g/L, citric acid 9g/L, thiocarbamide 4.5mg/L, adopts weak acid or weak base to adjust plating solution pH=5.0; By blade surface preplating Ni-P alloy 15min to be plated; To the modification TiAlN that adds 4g/L in plating solution, 85 ℃ of plating temperatures, plating time 30min; On the basis of previous step, improve modification TiAlN concentration to 8g/L, 85 ℃ of plating temperatures, improve modification TiAlN concentration value again to 12g/L after plating time 30min, 90 ℃ of plating temperatures, plating time 30min, obtain the Ni-P/TiAlN gradient coating; Continue induction stirring in the electroless plating process, keep the plating solution homogeneity.The Ni-P/TiAlN coating sample of preparation is immersed to SiO
2after colloidal sol 3min, at 35 ℃ of air-dry processing 24h, then at 300 ℃ of constant temperature, process 20min, take out air cooling; Finally sample is warming up to 410 ℃ with the temperature rise rate of 3 ℃/min, constant temperature is processed 1h, takes out air cooling, makes final coating sample.
The Ni-P/TiAlN coating sample obtained is carried out to rub(bing)test, tension test and electrochemistry experiment, and as shown in Figure 3, rubbing factor is 0.5174 to the sample wear morphology, and bonding force is 141MPa, and electrochemical parameter is as shown in table 1.
Embodiment 3
Scraper matrix surface pre-treatment: the scraper matrix is immersed to alkali lye, alkali lye component: 50g/L NaOH, 5g/LNaSiO
3, 30g/L NaCO
3, except 85 ℃ of oil temperatures, oil removing time 30min; Washed with de-ionized water; Matrix is immersed to 15%HCl rust cleaning 60s, activate about 15s after distilled water flushing in 5%HCl, to be plated after deionized water rinsing; The TiAlN surface modification: the TiAlN powder is through 10% NH
4f solution alligatoring 30min, 10g/L SnCl
2with sensitization 8min in 4g/L HCl solution and at 0.5g/L PdC
l2after activation 8min in 22ml/L HCl activation solution, centrifugation is dried, and inserts modification liquid and carries out the nickel coating, and the modification liquid component is: single nickel salt 30g/L, hydrazine hydrate 134.2/L, sodium tartrate 20g/L, EDETATE SODIUM 9.09g/L.Wherein, pH=12,95 ℃ of temperature, loading capacity 15g/L, obtain the nickel dam that 2-3 μ m is thick and coat the TiAlN powder; Preparation chemical nickel plating phosphor bath, bath composition is single nickel salt 30g/L, inferior sodium phosphate 44g/L, sodium-acetate 18g/L, lactic acid 26.5g/L, citric acid 10.5g/L, thiocarbamide 6mg/L, adopts weak acid or weak base to adjust plating solution pH=5.1; By blade surface preplating Ni-P alloy 20min to be plated; Add 5g/L modification TiAlN slip, 80 ℃ of plating temperatures, plating time 10min in plating solution; On the basis of previous step, increase modification TiAlN concentration to 10g/L, 80 ℃ of plating temperatures, improve again modification TiAlN concentration value after plating time 30min to 14g/L, 80 ℃ of plating temperatures, plating time 20min, and then improve modification TiAlN concentration value to 17g/L, 80 ℃ of plating temperatures, plating time 30min, and then improve modification TiAlN concentration value to 19g/L, 80 ℃ of plating temperatures, plating time 30min, and then improve modification TiAlN concentration value to 20g/L, 80 ℃ of plating temperatures, plating time 30min, obtain the Ni-P/TiAlN gradient coating; Continue induction stirring in the electroless plating process, keep the plating solution homogeneity.The Ni-P/TiAlN coating sample of preparation is immersed to SiO
2after colloidal sol 5min, at 40 ℃ of air-dry processing 12h, then at 320 ℃ of constant temperature, process 15min, take out air cooling; Finally sample is warming up to 420 ℃ with the temperature rise rate of 5 ℃/min, constant temperature is processed 0.5h, takes out air cooling, makes final coating sample.
The Ni-P/TiAlN coating sample obtained is carried out to rub(bing)test, tension test and electrochemistry experiment, and as shown in Figure 4, rubbing factor is 0.5162 to the sample wear morphology, and bonding force is 144MPa, and electrochemical parameter is as shown in table 1.
Comparative Examples
Scraper matrix surface pre-treatment: the scraper matrix is immersed to alkali lye, alkali lye component: 50g/L NaOH, 5g/LNaSiO
3, 30g/L NaCO
3, except 85 ℃ of oil temperatures, oil removing time 40min; Washed with de-ionized water; Matrix is immersed to 15%HCl rust cleaning 30s, activate about 10s after distilled water flushing in 5v%HCl, to be plated after deionized water rinsing; Preparation chemical nickel plating phosphor bath, bath composition is single nickel salt 25g/L, inferior sodium phosphate 35g/L, sodium-acetate 12g/L, lactic acid 24.7g/L, citric acid 7.5g/L, thiocarbamide 3mg/L, adopts weak acid or weak base to adjust plating solution pH=4.8; By 90 ℃ of blade surface plating preplating Ni-P alloy plating temperatures to be plated, plating time 1h.Continue induction stirring in the electroless plating process, keep the plating solution homogeneity.
The Ni-P coating sample obtained is carried out to rub(bing)test, tension test and electrochemistry experiment, and as shown in Figure 5, the coating rubbing factor is 0.7922 to the sample wear morphology, and bonding force is 150MPa, and electrochemical parameter is as shown in table 1.
The electrochemical parameter of each coating sample of table 1 and scraper matrix
As can be seen from Table 1, from corrosion current density or corrosion kinetics angle, the corrosion resisting property of each sample is arranged as from high to low: Ni-P coating prepared by the Ni-P/TiAlN coating>Comparative Examples of Ni-P/TiAlN coating>embodiment 3 preparations of Ni-P/TiAlN coating>embodiment 2 preparations of embodiment 1 preparation>scraper matrix.
Claims (7)
1. a wear-resisting erosion resistance Ni-P/TiAlN gradient coating is characterized in that: comprise by percentage to the quality following component:
Ni?80-84%；
P?9-12%；
TiAlN?1-10%；
TiAlN is distribution gradient in coating; The concentration of TiAlN is along successively decreasing perpendicular to the direction of matrix and coating interface.
2. a method for preparing wear-resisting erosion resistance Ni-P/TiAlN gradient coating as claimed in claim 1 is characterized in that:
To through the base material of surface preparation, immerse in plating solution, first at the thick nickel-phosphorus alloy of substrate surface plating one deck 5-10 μ m, then add modified Nano TiAlN powder in plating solution, controlling the starting point concentration of modified Nano TiAlN powder in plating solution is 1-15g/L, after every plating 10-30min, add modified Nano TiAlN powder, make the concentration of modification TiAlN powder improve 1-5g/L, until obtain having the plating piece of desired thickness coating;
Described plating solution comprises following component in mass concentration: single nickel salt 25-30g/L, inferior sodium phosphate 35-44g/L, sodium-acetate 12-18g/L, lactic acid 21.5-26.6g/L, citric acid 7.5-10.5g/L, thiocarbamide 3-6mg/L;
Described modified Nano TiAlN powder is the TiAlN powder that is coated with nickel, and the coating thickness of nickel is 2-3 μ m;
During plating, loading capacity is 0.8-1.2dm
2/ L, temperature is 85-95 ℃, the pH value is 4.8-5.1; The total time of plating is 60-180min.
3. the preparation method of a kind of wear-resisting erosion resistance Ni-P/TiAlN gradient coating according to claim 2, is characterized in that: the plating piece immersion SiO that will have desired thickness coating
2colloidal sol 1-5min, make its fully wetting Ni-P/TiAlN coating surface, takes out plating piece, after 25-40 ℃ of leeward dry-cure 12-36h, at 280-320 ℃ of constant temp. heating, processes 15-30min, obtains the plating piece that sealing of hole is processed.
4. the preparation method of a kind of wear-resisting erosion resistance Ni-P/TiAlN gradient coating according to claim 3, it is characterized in that: the plating piece after sealing of hole is processed is warming up to 400-420 ℃ with speed 2-5 ℃/min, after constant temperature is processed 0.5h-1.5h, take out the sample air cooling, obtain finished product.
5. the preparation method of a kind of wear-resisting erosion resistance Ni-P/TiAlN gradient coating according to claim 2, it is characterized in that: base material is ink knife.
6. the preparation method of a kind of wear-resisting erosion resistance Ni-P/TiAlN gradient coating according to claim 5, it is characterized in that: substrate surface treatment is that base material is carried out to oil removing, rust cleaning, activation treatment;
Oil removing is soaked realization by alkali, and oil removing alkali lye used comprises in mass concentration: 48-52g/L NaOH, 4-6g/L NaSiO
3, 28-32g/L NaCO
3, the temperature that alkali soaks is 70-85 ℃, the time that alkali soaks is 30-60min; Alkali soaks the rear washed with de-ionized water of using;
Rust cleaning realizes by acidleach, the HCl that the acid solution used that eliminates rust is 15-20v%, and the time of acidleach is 20-60s, uses washed with de-ionized water after acidleach;
Activation is the base material of oil removing, rust cleaning to be put into to the HCl that concentration is 5-10v% soak 8-15s; Base material after activation is rinsed well with deionized water, to be plated.
7. the preparation method of a kind of wear-resisting erosion resistance Ni-P/TiAlN gradient coating according to claim 2 is characterized in that:
By following step, prepared by modified Nano TiAlN powder:
The step 1 alligatoring
Nano-TiAl N powder is immersed to the NH that concentration is 8-12wt%
4in F solution, after at room temperature electromagnetic force stirs 20-30min, centrifugation;
The step 2 sensitization
Powder after alligatoring is placed on to 10-11g/L SnCl
2in 4-5g/L HCl solution, under room temperature, electromagnetic force stirs 3-8min, centrifugation;
The step 3 activation
Powder after sensitization is placed on to 0.4-0.6g/L PdC
l2in 20-22ml/L HCl activation solution, under room temperature, electromagnetic force stirs 3-8min, centrifugation post-drying;
Step 4 coats
Powder after activation is put into to modification liquid and coated, obtain being coated with the TiAlN powder of the thick nickel dam of 2-3 μ m; Described modification liquid comprises following component in mass concentration: single nickel salt 25-30g/L, hydrazine hydrate 82.5-134.5g/L, sodium tartrate 15-20g/L, EDETATE SODIUM 7-9.1g/L; During modification, loading capacity is 4.0-15g/L, and the pH value of modification liquid is that 11-12, temperature are 85-95 ℃.
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| CN108330442A (en) * | 2018-01-29 | 2018-07-27 | 九牧厨卫股份有限公司 | A kind of chromium carbide compounded coating and preparation method thereof |
| CN111005002A (en) * | 2020-01-08 | 2020-04-14 | 中国航空制造技术研究院 | Preparation method of erosion-resistant and corrosion-resistant self-cleaning coating for compressor blade |
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| CN102115883A (en) * | 2011-01-12 | 2011-07-06 | 超晶科技有限公司 | Surface compound strengthening process for aluminum alloy material |
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| CN111005002A (en) * | 2020-01-08 | 2020-04-14 | 中国航空制造技术研究院 | Preparation method of erosion-resistant and corrosion-resistant self-cleaning coating for compressor blade |
| CN111005002B (en) * | 2020-01-08 | 2021-10-29 | 中国航空制造技术研究院 | Preparation method of erosion-resistant and corrosion-resistant self-cleaning coating for compressor blade |
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