Corrosion-resistant treatment process for ball valve and ball valve manufactured thereby

Abstract

The application relates to the technical field of metal material surface treatment, in particular to a ball valve corrosion-resistant treatment process and a ball valve manufactured by the same. The ball valve corrosion-resistant treatment process comprises the following steps: pretreating the ball valve, then configuring a chemical plating solution, chemically plating the pretreated ball valve to obtain a chemically plated ball valve, and finally post-treating the chemically plated ball valve to obtain a ball valve subjected to surface corrosion-resistant treatment. The chemical plating solution contains a leveling agent and an antioxidant. The leveling agent contains tetrahydrothiazole thione, and the antioxidant contains sodium benzoate. The ball valve corrosion-resistant treatment process can improve the consistency of the plating layer thickness during the chemical plating of the ball valve.

Description

Technical Field

[0001] This invention relates to the field of metal material surface treatment technology, specifically to a corrosion-resistant treatment process for ball valves and the ball valves manufactured from it. Background Technology

[0002] The large curvature of the ball valve surface can lead to uneven distribution of metal ions in certain areas, resulting in uneven chemical plating. Since the ball valve surface is most susceptible to stress, erosion, and corrosion, the depressions and protrusions in these areas can cause the plating to peel off and leak. Therefore, there is an urgent need for a ball valve surface treatment process that can make the plating thickness more uniform. Summary of the Invention

[0003] The purpose of this invention is to provide a corrosion-resistant treatment process for ball valves and a ball valve made therefrom, in order to overcome the shortcomings of related technologies.

[0004] To achieve the above objectives, the present invention provides the following technical solution: According to a first aspect of the present disclosure, a corrosion-resistant treatment process for a ball valve is provided, the ball valve corrosion-resistant treatment process comprising the following steps: Step 1: Provide a ball valve, and pre-process the ball valve to obtain a pre-processed ball valve; Step 2: Prepare a chemical plating solution, and chemically plating the pretreated ball valve to obtain a chemically plated ball valve; Step 3: The chemically plated ball valve is post-treated to obtain a ball valve with a surface corrosion-resistant finish; The electroless plating solution contains nickel salt, leveling agent, and antioxidant; the leveling agent contains tetrahydrothiazolylthione; and the antioxidant contains sodium benzoate.

[0005] In this disclosure, the ball valve is made of stainless steel, carbon steel, or low alloy steel.

[0006] In one aspect of this disclosure, step 1 includes: Step 1-1: Provide a ball valve, prepare an alkaline solution, add the ball valve to the alkaline solution, and simultaneously perform ultrasonic treatment; Step 1-2: The ultrasonically treated ball valve is subjected to anodic electrolysis, and then washed and dried to obtain the pretreated ball valve.

[0007] In one aspect of this disclosure, the electroless plating solution further comprises a reducing agent; The reducing agent is selected from one or more of sodium hypochlorite, sodium hypophosphite, sodium borohydride, and sodium formate.

[0008] In one aspect of this disclosure, the electroless plating solution further comprises at least one of a surfactant, a complexing agent, a buffer, an accelerator, and a stabilizer.

[0009] In one aspect of this disclosure, the content of the nickel salt in the electroless plating solution is selected from 20-40 g / L.

[0010] In one aspect of this disclosure, the leveling agent is selected from 2-10 g / L in the electroless plating solution.

[0011] In one aspect of this disclosure, the antioxidant content in the electroless plating solution is selected from 0.3-3 g / L.

[0012] In one aspect of this disclosure, the nickel salt is selected from nickel sulfate, nickel chloride, nickel sulfamate, nickel acetate, nickel hypophosphite, nickel oxalate, or nickel nitrate.

[0013] In one aspect of this disclosure, the reducing agent in the electroless plating solution is selected from 30-45 g / L.

[0014] In one aspect of this disclosure, the content of the complexing agent in the electroless plating solution is selected from 5-12 g / L.

[0015] In one aspect of this disclosure, the complexing agent is selected from trisodium citrate, sodium glycolate, glycine, or disodium ethylenediaminetetraacetate.

[0016] In one aspect of this disclosure, the content of the buffer in the electroless plating solution is selected from 5-15 g / L.

[0017] In one aspect of this disclosure, the buffer is selected from ammonium chloride or boric acid.

[0018] In one aspect of this disclosure, the accelerator content in the electroless plating solution is selected from 1-5 g / L.

[0019] In one aspect of this disclosure, the accelerator is selected from potassium fluoride, sodium fluoride, sodium lactate, or sodium malonate.

[0020] In one aspect of this disclosure, the content of the stabilizer in the electroless plating solution is selected from 0.2-2 g / L.

[0021] In one aspect of this disclosure, the stabilizer is selected from 2,2'-bipyridine, thiourea, potassium ferrocyanide, sodium saccharin, or sodium molybdate.

[0022] In one aspect of this disclosure, the surfactant is selected from alkyl betaine surfactants or cationic quaternary ammonium salt surfactants.

[0023] In one aspect of this disclosure, the surfactant content in the electroless plating solution is selected from 0.2-3 g / L.

[0024] In one aspect of this disclosure, the leveling agent comprises tetrahydrothiazothione, propynyl propoxy ether, and etynylcyclohexanol; and the mass ratio of tetrahydrothiazothione, propynyl propoxy ether, and etynylcyclohexanol is selected from (2-3):(4-7):(1-2).

[0025] In one aspect of the embodiments of this disclosure, the electroless plating solution contains a nickel salt, a reducing agent, a leveling agent, an antioxidant, a complexing agent, an accelerator, and a surfactant, wherein the reducing agent is sodium hypophosphite, the antioxidant further includes p-hydroxyanisole, the complexing agent is trisodium citrate, the accelerator is potassium fluoride, and the surfactant is tetradecyl dimethyl betaine.

[0026] In one aspect of this disclosure, step 3 includes: Step 3-1: The chemically plated ball valve is washed with hot water and dried with hot air; Step 3-2: Then place the ball valve under inert gas protection and keep it at 300℃-350℃ for 1-1.5h, and then let it cool naturally to room temperature to obtain the ball valve with surface corrosion resistance treatment.

[0027] According to a second aspect of the present disclosure, a corrosion-resistant ball valve is provided, which is prepared by the aforementioned ball valve corrosion-resistant treatment process.

[0028] Compared with the prior art, the beneficial effects of the present invention are: the present disclosure prepares a chemical plating solution containing the leveling agent provided in the present disclosure, which can improve the consistency of the coating thickness during the chemical plating process of ball valve. Detailed Implementation

[0029] The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. The embodiments described herein are illustrative in nature and are used to provide a basic understanding of this application. The embodiments of this application should not be construed as limiting this application.

[0031] For the sake of brevity, this article only discloses a few specific numerical ranges. However, any lower limit can be combined with any upper limit to form an unspecified range; and any lower limit can be combined with other lower limits to form an unspecified range, just as any upper limit can be combined with any other upper limit to form an unspecified range. Furthermore, each individually disclosed point or single value can itself serve as a lower or upper limit and be combined with any other point or single value or with other lower or upper limits to form an unspecified range.

[0032] The present disclosure is further illustrated below with reference to embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the disclosure.

[0033] Examples and comparative examples: Example 1: Example 1 includes the following steps: A ball valve (made of 316 stainless steel, the same material and specifications as in other embodiments and comparative examples) is provided, and an alkaline solution is prepared, which contains 35 g / L of sodium hydroxide and 20 g / L of sodium carbonate. The ball valve was added to an alkaline solution and simultaneously subjected to ultrasonic treatment at 20 kHz for 5 minutes. The ultrasonically treated ball valve was then immersed in an anolyte for anolytical treatment, followed by washing and drying to obtain a pretreated ball valve. The anolyte contained sulfuric acid (75 g / L) and sodium persulfate (10 g / L). The current density during electrolysis was 5 A / dm³. 2 The electrolysis time is 1 minute.

[0034] The chemical plating solution prepared in Example 1 includes: 35 g / L nickel sulfate hexahydrate, 35 g / L sodium hypophosphite, 8 g / L trisodium citrate, 2 g / L potassium fluoride, 0.5 g / L tetradecyl dimethyl betaine, 7 g / L tetrahydrothiazolyl thiophene (leveling agent), and 1 g / L sodium benzoate (antioxidant).

[0035] The activated ball valve was chemically plated for 45 minutes to obtain a chemically plated ball valve. The chemically plated ball valve was then washed with hot water (80°C) and dried with hot air (120°C). The ball valve was then placed under argon gas protection and kept at 325°C for 1 hour, and then naturally cooled to room temperature to obtain the ball valve with surface corrosion resistance treatment of Example 1.

[0036] Example 2: Example 2 includes the following steps: A ball valve (made of 316 stainless steel, the same material and specifications as in other embodiments and comparative examples) is provided, and an alkaline solution is prepared, which contains 35 g / L of sodium hydroxide and 20 g / L of sodium carbonate. The ball valve was added to an alkaline solution and simultaneously subjected to ultrasonic treatment at 20 kHz for 5 minutes. The ultrasonically treated ball valve was then immersed in an anolyte for anolytical treatment, followed by washing and drying to obtain a pretreated ball valve. The anolyte contained sulfuric acid (75 g / L) and sodium persulfate (10 g / L). The current density during electrolysis was 5 A / dm³. 2 The electrolysis time is 1 minute.

[0037] The chemical plating solution prepared in Example 2 includes: 35 g / L nickel sulfate hexahydrate, 35 g / L sodium hypophosphite, 8 g / L trisodium citrate, 2 g / L potassium fluoride, 0.5 g / L tetradecyl dimethyl betaine, 3 g / L tetrahydrothiazolyl thiophene, and 4 g / L propynyl alcohol propoxy ether as a leveling agent, and 1 g / L sodium benzoate (antioxidant).

[0038] The activated ball valve was chemically plated for 45 minutes to obtain a chemically plated ball valve. The chemically plated ball valve was then washed with hot water (80°C) and dried with hot air (120°C). The ball valve was then placed under argon gas protection and kept at 325°C for 1 hour, and then naturally cooled to room temperature to obtain the ball valve with surface corrosion resistance treatment of Example 2.

[0039] The main difference between Example 2 and Example 1 is that the composition of the leveling agent in Example 2 is different.

[0040] Example 3: Example 3 includes the following steps: A ball valve (made of 316 stainless steel, the same material and specifications as in other embodiments and comparative examples) is provided, and an alkaline solution is prepared, which contains 35 g / L of sodium hydroxide and 20 g / L of sodium carbonate. The ball valve was added to an alkaline solution and simultaneously subjected to ultrasonic treatment at 20 kHz for 5 minutes. The ultrasonically treated ball valve was then immersed in an anolyte for anolytical treatment, followed by washing and drying to obtain a pretreated ball valve. The anolyte contained sulfuric acid (75 g / L) and sodium persulfate (10 g / L). The current density during electrolysis was 5 A / dm³. 2 The electrolysis time is 1 minute.

[0041] The chemical plating solution prepared in Example 3 includes: 35 g / L nickel sulfate hexahydrate, 35 g / L sodium hypophosphite, 8 g / L trisodium citrate, 2 g / L potassium fluoride, 0.5 g / L tetradecyl dimethyl betaine, 2 g / L tetrahydrothiazolyl thione, 3 g / L propynyl alcohol propoxy ether, and 1 g / L ethynylcyclohexanol as a leveling agent, and 1 g / L sodium benzoate (antioxidant).

[0042] The activated ball valve was chemically plated for 45 minutes to obtain a chemically plated ball valve. The chemically plated ball valve was then washed with hot water (80°C) and dried with hot air (120°C). The ball valve was then placed under argon gas protection and kept at 325°C for 1 hour, and then naturally cooled to room temperature to obtain the ball valve with surface corrosion resistance treatment as described in Example 3.

[0043] The main difference between Example 3 and Example 1 is that the composition of the leveling agent in Example 3 is different.

[0044] Example 4: Example 4 includes the following steps: A ball valve (made of 316 stainless steel, the same material and specifications as in other embodiments and comparative examples) is provided, and an alkaline solution is prepared, which contains 35 g / L of sodium hydroxide and 20 g / L of sodium carbonate. The ball valve was added to an alkaline solution and simultaneously subjected to ultrasonic treatment at 20 kHz for 5 minutes. The ultrasonically treated ball valve was then immersed in an anolyte for anolytical treatment, followed by washing and drying to obtain a pretreated ball valve. The anolyte contained sulfuric acid (75 g / L) and sodium persulfate (10 g / L). The current density during electrolysis was 5 A / dm³. 2 The electrolysis time is 1 minute.

[0045] The chemical plating solution of Example 4 is prepared as follows: 35 g / L nickel sulfate hexahydrate, 35 g / L sodium hypophosphite, 8 g / L trisodium citrate, 2 g / L potassium fluoride, 0.5 g / L tetradecyl dimethyl betaine, 2 g / L tetrahydrothiazolyl thiophene, 3 g / L propynyl alcohol propoxy ether, and 1 g / L etynylcyclohexanol as a leveling agent, and 0.5 g / L sodium benzoate and 0.5 g / L p-hydroxyanisole as antioxidants.

[0046] The activated ball valve was chemically plated for 45 minutes to obtain a chemically plated ball valve. The chemically plated ball valve was then washed with hot water (80°C) and dried with hot air (120°C). The ball valve was then placed under argon gas protection and kept at 325°C for 1 hour, and then naturally cooled to room temperature to obtain the ball valve with surface corrosion resistance treatment of Example 4.

[0047] The difference between Example 4 and Example 3 is that the antioxidant in Example 4 also contains p-hydroxyanisole.

[0048] Comparative Example 1: Comparative Example 1 includes the following steps: A ball valve (made of 316 stainless steel, the same material and specifications as in other embodiments and comparative examples) is provided, and an alkaline solution is prepared, which contains 35 g / L of sodium hydroxide and 20 g / L of sodium carbonate. The ball valve was added to an alkaline solution and simultaneously subjected to ultrasonic treatment at 20 kHz for 5 minutes. The ultrasonically treated ball valve was then immersed in an anolyte for anolytical treatment, followed by washing and drying to obtain a pretreated ball valve. The anolyte contained sulfuric acid (75 g / L) and sodium persulfate (10 g / L). The current density during electrolysis was 5 A / dm³. 2 The electrolysis time is 1 minute.

[0049] Prepare the chemical plating solution for Comparative Example 1. The chemical plating solution includes: 35 g / L nickel sulfate hexahydrate, 35 g / L sodium hypophosphite, 8 g / L trisodium citrate, 2 g / L potassium fluoride, 0.5 g / L tetradecyl dimethyl betaine, and 1 g / L sodium benzoate (antioxidant).

[0050] The activated ball valve was chemically plated for 45 minutes to obtain a chemically plated ball valve. The chemically plated ball valve was then washed with hot water (80℃ hot water) and dried with hot air (120℃). The ball valve was then placed under argon gas protection and kept at 325℃ for 1 hour, and then naturally cooled to room temperature to obtain the ball valve with surface corrosion resistance treatment of Comparative Example 1.

[0051] The main difference between Comparative Example 1 and Example 1 is that Comparative Example 1 does not contain the leveling agent found in Example 1.

[0052] Comparative Example 2: Comparative Example 2 includes the following steps: A ball valve (made of 316 stainless steel, the same material and specifications as in other embodiments and comparative examples) is provided, and an alkaline solution is prepared, which contains 35 g / L of sodium hydroxide and 20 g / L of sodium carbonate. The ball valve was added to an alkaline solution and simultaneously subjected to ultrasonic treatment at 20 kHz for 5 minutes. The ultrasonically treated ball valve was then immersed in an anolyte for anolytical treatment, followed by washing and drying to obtain a pretreated ball valve. The anolyte contained sulfuric acid (75 g / L) and sodium persulfate (10 g / L). The current density during electrolysis was 5 A / dm³.2 The electrolysis time is 1 minute.

[0053] Prepare the chemical plating solution for Comparative Example 2. The chemical plating solution includes: 35 g / L nickel sulfate hexahydrate, 35 g / L sodium hypophosphite, 8 g / L trisodium citrate, 2 g / L potassium fluoride, 0.5 g / L tetradecyl dimethyl betaine, and 7 g / L tetrahydrothiazolyl thiophene (leveling agent).

[0054] The activated ball valve was chemically plated for 45 minutes to obtain a chemically plated ball valve. The chemically plated ball valve was then washed with hot water (80°C) and dried with hot air (120°C). The ball valve was then placed under argon gas protection and kept at 325°C for 1 hour, and then naturally cooled to room temperature to obtain the ball valve with surface corrosion resistance treatment of Comparative Example 2.

[0055] The main difference between Comparative Example 2 and Example 1 is that Comparative Example 2 does not contain the antioxidants found in Example 1.

[0056] Comparative Example 3: Comparative Example 3 includes the following steps: A ball valve (made of 316 stainless steel, the same material and specifications as in other embodiments and comparative examples) is provided, and an alkaline solution is prepared, which contains 35 g / L of sodium hydroxide and 20 g / L of sodium carbonate. The ball valve was added to an alkaline solution and simultaneously subjected to ultrasonic treatment at 20 kHz for 5 minutes. The ultrasonically treated ball valve was then immersed in an anolyte for anolytical treatment, followed by washing and drying to obtain a pretreated ball valve. The anolyte contained sulfuric acid (75 g / L) and sodium persulfate (10 g / L). The current density during electrolysis was 5 A / dm³. 2 The electrolysis time is 1 minute.

[0057] Prepare a chemical plating solution for Comparative Example 3. The chemical plating solution includes: 35 g / L nickel sulfate hexahydrate, 35 g / L sodium hypophosphite, 8 g / L trisodium citrate, 2 g / L potassium fluoride, and 0.5 g / L tetradecyl dimethyl betaine.

[0058] The activated ball valve was chemically plated for 45 minutes to obtain a chemically plated ball valve. The chemically plated ball valve was then washed with hot water (80°C) and dried with hot air (120°C). The ball valve was then placed under argon gas protection and kept at 325°C for 1 hour, and then naturally cooled to room temperature to obtain the ball valve of Comparative Example 3 with surface corrosion resistance treatment.

[0059] The main difference between Comparative Example 3 and Example 1 is that Comparative Example 3 does not contain the leveling agent and antioxidant found in Example 1.

[0060] Comparative Example 4: Comparative Example 4 includes the following steps: A ball valve (made of 316 stainless steel, the same material and specifications as in other embodiments and comparative examples) is provided, and an alkaline solution is prepared, which contains 35 g / L of sodium hydroxide and 20 g / L of sodium carbonate. The ball valve was added to an alkaline solution and simultaneously subjected to ultrasonic treatment at 20 kHz for 5 minutes. The ultrasonically treated ball valve was then immersed in an anolyte for anolytical treatment, followed by washing and drying to obtain a pretreated ball valve. The anolyte contained sulfuric acid (75 g / L) and sodium persulfate (10 g / L). The current density during electrolysis was 5 A / dm³. 2 The electrolysis time is 1 minute.

[0061] Prepare the chemical plating solution for Comparative Example 4. The chemical plating solution includes: 35 g / L nickel sulfate hexahydrate, 35 g / L sodium hypophosphite, 8 g / L trisodium citrate, 2 g / L potassium fluoride, 0.5 g / L tetradecyl dimethyl betaine, 7 g / L tetrahydrothiazolyl thiophene (leveling agent), and 1 g / L ascorbic acid (antioxidant).

[0062] The activated ball valve was chemically plated for 45 minutes to obtain a chemically plated ball valve. The chemically plated ball valve was then washed with hot water (80°C) and dried with hot air (120°C). The ball valve was then placed under argon gas protection and kept at 325°C for 1 hour, and then naturally cooled to room temperature to obtain the ball valve of Comparative Example 4 with surface corrosion resistance treatment.

[0063] Coating thickness test: Five points were randomly selected on the outer surface of the ball valve body obtained in the examples and comparative examples (i.e., the spherical surface of the ball valve body) to test the coating thickness (in μm) and calculate the variance. Each test was performed three times, and the values ​​are shown in Table 1. Table 1 As can be seen, Example 1, which uses tetrahydrothiazolium thione as a leveling agent, exhibits better coating thickness uniformity than Comparative Example 1. This is because the molecular structure of tetrahydrothiazolium thione contains heterocyclic groups and thiol groups, which have a positive effect on Ni... 2+It possesses a certain complexing ability; it can preferentially adsorb in the protruding high-current region, increasing cathode polarization and inhibiting the longitudinal growth of coating crystals, thereby making the coating thickness more uniform. It can be seen that the coating thickness uniformity of Example 2, which further uses propynyl propoxy ether, and Example 3, which further uses propynyl propoxy ether + ethynylcyclohexanol, is better than that of Example 1. This is because the molecular structure of propynyl propoxy ether contains carbon-carbon triple bonds and ether-oxygen bonds at its ends, allowing electron transfer at lower potentials. Therefore, it can replenish the recessed low-current region, forming secondary nucleation sites, increasing the deposition rate in the recessed low-current region, and thus making the coating thickness more uniform.

[0064] Furthermore, it can be seen that the examples using sodium benzoate as an antioxidant are more effective than the comparative examples that do not use an antioxidant or use other antioxidants. This is because sodium benzoate can form a reversible protective salt on the thiol group of tetrahydrothiazolyl ketone, inhibiting its oxidation to disulfide by ions in the system. Moreover, it can be seen that Example 4, which further includes p-hydroxyanisole, is more effective than Example 3, which uses only sodium benzoate. This is because p-hydroxyanisole can capture free radicals and block the oxidative polymerization of propynyl propoxy ether and etynylcyclohexanol at high temperatures.

[0065] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the disclosure herein. This disclosure is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein.

Claims

1. A corrosion-resistant treatment process for ball valves, characterized in that, The corrosion-resistant treatment process for the ball valve includes the following steps: Step 1: Provide a ball valve, and pre-process the ball valve to obtain a pre-processed ball valve; Step 2: Prepare a chemical plating solution, and chemically plating the pretreated ball valve to obtain a chemically plated ball valve; Step 3: The chemically plated ball valve is post-treated to obtain a ball valve with a surface corrosion-resistant finish; The electroless plating solution contains nickel salt, leveling agent, and antioxidant; the antioxidant contains sodium benzoate; the leveling agent contains tetrahydrothiazothione, propynyl propoxy ether, and etynylcyclohexanol; and the mass ratio of tetrahydrothiazothione, propynyl propoxy ether, and etynylcyclohexanol is selected from (2-3):(4-7):(1-2). The nickel salt is selected from nickel sulfate, nickel chloride, nickel sulfamate, nickel acetate, nickel hypophosphite, nickel oxalate, or nickel nitrate.

2. The corrosion-resistant treatment process for ball valves according to claim 1, characterized in that, Step 1 includes: Step 1-1: Provide a ball valve, prepare an alkaline solution, add the ball valve to the alkaline solution, and simultaneously perform ultrasonic treatment; Step 1-2: The ultrasonically treated ball valve is subjected to anodic electrolysis, and then washed and dried to obtain the pretreated ball valve.

3. The corrosion-resistant treatment process for ball valves according to claim 1, characterized in that, The electroless plating solution also contains a reducing agent; The reducing agent is selected from one or more of sodium hypochlorite, sodium hypophosphite, sodium borohydride, and sodium formate. The content of the reducing agent in the electroless plating solution is selected from 30-45 g / L.

4. The corrosion-resistant treatment process for ball valves according to claim 1, characterized in that, The electroless plating solution also contains at least one of surfactants, complexing agents, buffers, accelerators, and stabilizers.

5. The corrosion-resistant treatment process for ball valves according to claim 1, characterized in that, The corrosion-resistant treatment process for the ball valve meets at least one of the following conditions: (1) The content of the nickel salt in the electroless plating solution is selected from 20-40 g / L; (2) The content of the leveling agent in the chemical plating solution is selected from 2-10 g / L; (3) The content of the antioxidant in the chemical plating solution is selected from 0.3-3 g / L.

6. The corrosion-resistant treatment process for ball valves according to claim 4, characterized in that, The corrosion-resistant treatment process for the ball valve meets at least one of the following conditions: (1) The content of the complexing agent in the chemical plating solution is selected from 5-12 g / L; (2) The complexing agent is selected from trisodium citrate, sodium glycolate, glycine or disodium ethylenediaminetetraacetate; (3) The content of the buffer in the chemical plating solution is selected from 5-15 g / L; (4) The buffer is selected from ammonium chloride or boric acid; (5) The content of the accelerator in the chemical plating solution is selected from 1-5 g / L; (6) The accelerator is selected from potassium fluoride, sodium fluoride, sodium lactate or sodium malonate; (7) The content of the stabilizer in the electroless plating solution is selected from 0.2-2 g / L; (8) The stabilizer is selected from 2,2'-bipyridine, thiourea, potassium ferrocyanide, sodium saccharin or sodium molybdate; (9) The surfactant is selected from alkyl betaine surfactants or cationic quaternary ammonium salt surfactants; (10) The content of the surfactant in the chemical plating solution is selected from 0.2-3 g / L.

7. The corrosion-resistant treatment process for ball valves according to claim 1, characterized in that, The electroless plating solution contains nickel salt, reducing agent, leveling agent, antioxidant, complexing agent, accelerator, and surfactant. The reducing agent is sodium hypophosphite, the antioxidant also includes p-hydroxyanisole, the complexing agent is trisodium citrate, the accelerator is potassium fluoride, and the surfactant is tetradecyl dimethyl betaine.

8. The corrosion-resistant treatment process for ball valves according to claim 1, characterized in that, Step 3 includes: Step 3-1: The chemically plated ball valve is washed with hot water and dried with hot air; Step 3-2: Then place the ball valve under inert gas protection and keep it at 300℃-350℃ for 1-1.5h, and then let it cool naturally to room temperature to obtain the ball valve with surface corrosion resistance treatment.

9. A corrosion-resistant ball valve, characterized in that, The corrosion-resistant ball valve is prepared by the corrosion-resistant treatment process of the ball valve as described in any one of claims 1-8.

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