Unlock instant, AI-driven research and patent intelligence for your innovation.

Plating method and placing device for reducing porosity of nickel-phosphorus alloy plated on inner surface of air cylinder

A technology of inner surface and nickel-phosphorus plating, applied in the direction of superimposed layer plating, metal material coating process, coating, etc., can solve the problems of large porosity of passivation layer, adverse reactions, increased corrosion holes, etc., and achieve electroplating And electroless plating is sufficient, the effect of improving anti-corrosion performance and saving processing cost

Pending Publication Date: 2018-11-13
CHENGDU GREAT HIGH PRESSURE VESSEL
View PDF5 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, chemical passivation is mostly used to improve the corrosion resistance of the inner surface of the gas cylinder. After chemical passivation, the inner surface forms a passivation film, which slows down the corrosion of the surface, but the passivation layer The porosity of the gas cylinder is relatively large. During use, the inner surface of the gas cylinder is prone to pitting corrosion. Pitting corrosion refers to the local appearance of longitudinal corrosion holes on the metal surface. A small change in the concentration of corrosion products or temperature can make the corrosion holes The rapid increase, causing large-scale corrosion of the inner surface of the gas cylinder
The inner surface of the gas cylinder has poor anti-corrosion ability, which greatly shortens the service life of the gas cylinder, and as the anti-corrosion ability of the inner surface of the gas cylinder decreases, it will cause adverse reactions, and in severe cases, the gas cylinder will explode
In the prior art, the device for processing the inner surface of the gas cylinder is complicated in structure and cumbersome in operation

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Plating method and placing device for reducing porosity of nickel-phosphorus alloy plated on inner surface of air cylinder
  • Plating method and placing device for reducing porosity of nickel-phosphorus alloy plated on inner surface of air cylinder
  • Plating method and placing device for reducing porosity of nickel-phosphorus alloy plated on inner surface of air cylinder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: a kind of plating device that reduces the porosity of the nickel-plated phosphorus alloy on the inner surface of the gas cylinder, comprising a plating tank 1, a suspension tool 2 for hanging the gas cylinder 5, an electroplating assembly 3 and an electroless plating assembly 4, the Said suspension frock 2 is located on the top of said plating tank 1; said electroplating assembly 3 comprises a rectifier 31 and an electroplating solution tank 32, said rectifier 31 has an anode and a cathode, and said electroplating solution tank 32 can be connected with said electroplating solution tank 32 Gas cylinder 5 bottoms are communicated; Described electroless plating assembly 4 comprises filter 41 and electroless plating solution tank 42, and described filter 41 is located at the liquid outlet end of described chemical plating solution tank 42, and the electroless plating solution tank 42 The liquid outlet end can communicate with the bottom of the gas cylinder 5 , ...

Embodiment 2

[0027] Embodiment 2: a kind of plating device that reduces the porosity of nickel-plated phosphorus alloy on the inner surface of the gas cylinder, comprising a plating tank 1, a suspension frock 2 for hanging the gas cylinder 5, an electroplating assembly 3 and an electroless plating assembly 4, the Said suspension tooling 2 is arranged on the top of said plating tank 1, and suspension assembly comprises top plate 21, is located at the suspension arm 24 of said top plate 21, bottom plate 22, two connecting rods 23 and two support rods 27, and said bottom plate 22 is connected with the end of the connecting rod 23 away from the top plate 21, the bottom plate 22 is provided with a second mounting hole for fixing the gas cylinder 5, and the top plate 21 is provided with a first mounting hole for fixing the gas cylinder 5. The first mounting hole is provided with a first joint 25, and the second mounting hole is provided with a second joint 26, and the first joint 25 is connected ...

Embodiment 3

[0030] Embodiment 3: Utilize the method for processing the inner surface of gas cylinder 5 by implementing the plating device of 1 or 2:

[0031] (a) pretreatment, the inner surface of the gas cylinder 5 is cleaned, then the top of the gas cylinder 5 is installed on the suspension tool 2, and the gas cylinder 5 is vertically placed in the plating tank 1, and the electroplating solution tank 32 The flexible pipes are connected to the bottom of the gas cylinder 5, and the electroplating solution is passed into the gas cylinder 5 by a water pump. Before the electroplating solution is passed into the gas cylinder 5, the electroplating solution in the electroplating solution tank 32 is heated to 20°C; place the nickel rod 311 from the top of the gas cylinder 5 into the gas cylinder 5, connect the anode of the rectifier 31 to the nickel rod 311, and connect the cathode of the rectifier 31 to the body of the gas cylinder 5 , start the rectifier 31, electroplating for 2 minutes; where...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
concentrationaaaaaaaaaa
Login to View More

Abstract

The invention discloses a plating method for reducing the porosity of nickel-phosphorus alloy plated on the inner surface of an air cylinder. The plating method comprises the following steps of: (a) vertically placing the air cylinder in a plating groove; connecting a hose of an electroplating liquid tank to the bottom of the air cylinder; feeding electroplating liquid into the air cylinder; placing a nickel rod in the air cylinder via the top of the air cylinder; connecting an anode of a rectifier to the nickel rod; connecting a cathode of the rectifier to the body of the air cylinder; and starting the rectifier to carry out electroplating for 2-3 min; (b) discharging the electroplating liquid which is positioned in the air cylinder; taking out the nickel rod; dismantling a hose connected with the electroplating liquid tank; cleaning the inner surface of the air cylinder in a flushing way; connecting a hose which is positioned at the liquid discharging end of a chemical electroplating liquid tank to the bottom of the air cylinder; connecting a hose which is at the liquid charging end of the chemical electroplating liquid tank to the top of the air cylinder; feeding chemical electroplating liquid to the air cylinder; and circulating the chemical electroplating liquid for 1-1.5 hours; and (c) after chemical electroplating is ended, discharging the chemical electroplating liquid; cleaning the inner surface of the air cylinder in a flushing way; placing the air cylinder into a heating furnace; maintaining the temperature at 200-220 DEG C for 2-3 hours; taking the air cylinderout of the furnace; and carrying out air cooling for 30 min.

Description

technical field [0001] The invention belongs to the technical field of gas cylinder processing, and in particular relates to a plating method and device for reducing the porosity of nickel-phosphorus alloy plating on the inner surface of a gas cylinder. Background technique [0002] The quality requirements of the inner surface of the gas cylinder are relatively high, especially for gas cylinders used to store corrosive gases, the inner surface must have high corrosion resistance. In the prior art, chemical passivation is mostly used to improve the corrosion resistance of the inner surface of the gas cylinder. After chemical passivation, the inner surface forms a passivation film, which slows down the corrosion of the surface, but the passivation layer The porosity of the gas cylinder is relatively large. During use, the inner surface of the gas cylinder is prone to pitting corrosion. Pitting corrosion refers to the local appearance of longitudinal corrosion holes on the met...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/12C23C18/32C23C28/02
CPCC23C18/32C23C28/021C25D3/12
Inventor 曾东刘大云陈刘斌黎晓磊范国金
Owner CHENGDU GREAT HIGH PRESSURE VESSEL