Stainless steel ball valve surface abrasion resisting and corrosion resisting high-phosphorus plating solution and abrasion resisting and corrosion resisting preparing method

A stainless steel ball, corrosion-resistant technology, applied in liquid chemical plating, metal material coating process, coating and other directions, can solve problems such as stability problems, improve wear resistance, improve corrosion resistance, and good lubricity Effect

Pending Publication Date: 2020-08-25
青田永拓金属表面技术处理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Described plating solution is complexing agent with CDTA (1,2-cyclohexanediaminetetraacetic acid) and lactic acid, with Ce 2 (SO 4 ) 3 ·8H 2 O is a stabilizer to solve the stability problem and spontaneous decomposition problem of the existing Ni-P plating solution

Method used

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  • Stainless steel ball valve surface abrasion resisting and corrosion resisting high-phosphorus plating solution and abrasion resisting and corrosion resisting preparing method
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  • Stainless steel ball valve surface abrasion resisting and corrosion resisting high-phosphorus plating solution and abrasion resisting and corrosion resisting preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A stainless steel ball valve surface wear-resistant and corrosion-resistant high phosphorus Ni-P-SiO 2 The preparation of composite coating is carried out according to the following steps:

[0023] (1) Equipped with nano-SiO 2 The acidic Ni-P plating solution, its plating solution composition is NiSO 4 ·7H 2 O 25g / L, NaH 2 PO 2 ·H 2 O 20g / L, CDTA (1,2-cyclohexanediaminetetraacetic acid) 35g / L, lactic acid 8ml / L, Ce 2 (SO 4 ) 3 ·8H 2 O is 3mg / L, sodium lauryl sulfate is 0.5g / L, SiO with a size of 60nm 2 10g / L, PDDA (diethylene glycol diacrylate) 3ml / L, with NaOH or H 2 SO 4 Adjust the pH of the solution to 4.

[0024] (2) will contain nano-SiO 2 The acidic Ni-P plating solution was stirred ultrasonically for 10 min, and then placed in a magnetic stirrer for 20 min.

[0025] (3) Using austenitic stainless steel (3cm×5cm) samples, first put the samples into 40g / L NaOH, 25g / L NaOH 2 CO 3 , 7g / L Na 3 PO 4 , 10g / L Na 2 SiO 3 and 1.5g / L OP-10 in the water-b...

Embodiment 2

[0029] The plating solution prepared in Step 2 of Example 1 was placed in an air environment for 30 days. Then according to Example 1 step 3-4 to obtain coated with Ni-P-SiO 2 Composite coated stainless steel samples.

[0030] After washing and drying the obtained samples, the surface morphology was observed by SEM ( figure 1 c), coating surface Ni-P content DES analysis (table 1), friction coefficient and wear rate analysis (table 2),

Embodiment 3

[0045] A stainless steel ball valve surface wear-resistant and corrosion-resistant high phosphorus Ni-P-SiO 2 The preparation of composite coating is carried out according to the following steps:

[0046] (1) Equipped with nano-SiO 2 The acidic Ni-P plating solution, its plating solution composition is NiSO 4 ·7H 2 O 25g / L, NaH 2 PO 2 ·H 2 O 20g / L, CDTA (1,2-cyclohexanediaminetetraacetic acid) 35g / L, lactic acid 5ml / L, Ce2(SO4)3·8H2O 2mg / L, sodium lauryl sulfate 0.5g / L , PDDA (diethylene glycol diacrylate) 3ml / L, nano-SiO with a size of 60nm 2 10g / L, with NaOH or H 2 SO 4 Adjust the pH of the solution to 4.

[0047] (2) will contain nano-SiO 2 The acidic Ni-P plating solution was stirred ultrasonically for 10 min, and then placed in a magnetic stirrer for 20 min.

[0048] (3) Using austenitic stainless steel (3cm×5cm) samples, first put the samples into 40g / L NaOH, 25g / L NaOH 2 CO 3 , 7g / L Na 3 PO 4 , 10g / L Na 2 SiO 3 and 1.5g / L OP-10 in the water-based compou...

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Abstract

The invention discloses a stainless steel ball valve surface abrasion resisting and corrosion resisting plating solution. The pH of the plating solution is 4. Soluble nickel salt is NiSO4.7H2O and contains 10 g / L of nano SiO2 with the size being about 60 nm. According to the plating solution, CDTA(1,2-cyclohexanediamine quadrol) and lactic acid serve as complexing agents, Ce2(SO4)3.8 H2O serves astabilizer, and accordingly the problem about stability and the problem about spontaneous decomposition of an existing Ni-P plating solution are solved. In addition, nano SiO2 enters a plating layer,the particle hardness of nano SiO2 particles is high, the ball bearing effect can be formed on the friction surface, sliding friction is changed into rolling friction, good lubricating performance isshown, and accordingly abrasion resistance of the plating layer is better improved. Based on the above plating solution, the invention further provides a stainless steel ball valve surface abrasion resisting and corrosion resisting composite plating layer preparing method, and the abrasion resisting and corrosion resisting performance of the stainless steel ball valve surface can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of surface protection treatment of large stainless steel ball valves, in particular to a wear-resistant and corrosion-resistant plating solution for the surface of stainless steel ball valves, by adding nano-SiO to the Ni-P plating solution 2 Plating a layer of Ni-P-SiO with high phosphorus content on the surface of stainless steel ball valve 2 Composite coating improves the wear resistance and corrosion resistance of the surface of the stainless steel ball valve. Background technique [0002] Ball valve is a valve with a ball as the opening and closing part. It is widely used in petroleum refining, long-distance pipelines, chemical industry, papermaking, pharmaceuticals, water conservancy, electric power, municipal, steel and other industries, and occupies a pivotal position in the national economy. . Due to the environmental characteristics of installation and use, ball valves are often exposed to corros...

Claims

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Application Information

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IPC IPC(8): C23C18/50
CPCC23C18/50
Inventor 陈长生沈秀杰付世平郑精武
Owner 青田永拓金属表面技术处理有限公司
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