Nickel-phosphorus alloy plated steel cylinder and plating method thereof

An alloy steel, nickel-phosphorus plating technology, applied in liquid chemical plating, metal material coating process, gas/liquid distribution and storage, etc. Achieve high corrosion resistance, extended service life and uniform thickness

Active Publication Date: 2010-12-22
CHENGDU GREAT HIGH PRESSURE VESSEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the corrosion resistance of the steel cylinder after phosphating treatment has been improved, it can only play the role of anticorrosion in a short time. As time goes by, white phosphating powder will be produced on the inner

Method used

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  • Nickel-phosphorus alloy plated steel cylinder and plating method thereof
  • Nickel-phosphorus alloy plated steel cylinder and plating method thereof
  • Nickel-phosphorus alloy plated steel cylinder and plating method thereof

Examples

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Embodiment 1

[0031] In this embodiment, an outer diameter of 219 mm and a length of 1980 mm are used for electroless plating on a double-headed steel cylinder, and the process steps are as follows:

[0032] (1) Treatment of steel cylinders to be plated

[0033] The treatment of the steel cylinder to be plated is water washing, pickling, water washing, activation and preheating in sequence; the water washing before pickling is to rinse off the sundries attached to the steel cylinder wall with tap water; the pickling uses hydrochloric acid aqueous solution to remove black spots on the inner wall of the steel cylinder , its formula is: tap water volume: hydrochloric acid volume=1: 0.5; Washing after pickling is to remove the hydrochloric acid of steel cylinder inner wall with tap water; Activation uses the hydrochloric acid aqueous solution of mass concentration 15%, and temperature is room temperature (25 ℃), and the time is 20 seconds; preheat with 80 ℃ deionized water, soaking time is 5 mi...

Embodiment 2

[0043] In this embodiment, a steel cylinder with an outer diameter of 219 mm and a length of 1630 mm is subjected to electroless plating, and the process steps are as follows:

[0044] (1) Treatment of steel cylinders to be plated

[0045]The treatment of the steel cylinder to be plated is water washing, pickling, water washing, activation and preheating in sequence; the water washing before pickling is to rinse off the sundries attached to the steel cylinder wall with tap water; the pickling uses hydrochloric acid aqueous solution to remove black spots on the inner wall of the steel cylinder , its formula is: tap water volume: hydrochloric acid volume=1: 1; Washing after pickling is to remove the hydrochloric acid of cylinder inner wall with tap water; Activation uses the hydrochloric acid aqueous solution of mass concentration 10%, and temperature is room temperature (25 ℃), and the time is 60 seconds; preheat with 90 ℃ deionized water, soaking time is 3 minutes.

[0046] (...

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Abstract

The invention relates to a nickel-phosphorus alloy plated steel cylinder comprising a cylinder body, an amorphous state nickel-phosphorus anticorrosive layer is plated on the inner wall of the cylinder body; and the thickness of the amorphous state nickel-phosphorus anticorrosive layer is 3-8 micrometers. A plating method of the nickel-phosphorus alloy plated steel cylinder comprises the following steps of: (1) processing a steel cylinder to be plated, that is to say, sequentially washing with water, washing with acids, washing with water, activating and preheating; (2) carrying out chemical plating on the steel cylinder, placing the steel cylinder into chemical plating equipment, wherein a plating solution is prepared from nickel sulfate, sodium hypophosphite, a complexing agent A, a complexing agent B, a buffering agent A, a buffering agent B, a stabilizer and deionized water, the temperature of the plating solution is controlled between 85 DEG C and 95 DEG C, and plating time lasts till the thickness of the amorphous state nickel-phosphorus anticorrosive layer deposited on the inner wall of the steel cylinder reaches 3-8 micrometers; (3) soaking the steel cylinder subjected to the chemical plating in a Na2CO3 water solution with the concentration of 30-50 g/L at room temperature, then soaking in the deionized water at 85-95 DEG C, and then naturally drying the steel cylinder.

Description

technical field [0001] The invention relates to a steel cylinder (also known as a gas cylinder) for containing various gases (nitrogen, oxygen, natural gas, etc.) and an anticorrosion method thereof. Background technique [0002] In view of the small diameter of the steel cylinder, the large length-to-diameter ratio, and the rough surface of the inner wall, the anti-corrosion (rust prevention) treatment of the inner wall of the steel cylinder has always been a difficult problem. Regarding the anti-corrosion treatment of the inner wall of the steel cylinder, there are mainly two stages, involving two methods: 1. The surface of the inner wall is dripping paint. From the end of the 1980s to the mid-1990s, the inner wall surface of the gas cylinder is generally directly treated by the manufacturer according to the needs. For treatment, the method of dripping anti-rust primer on the surface of the inner wall is usually used. Practice has proved that there will be no problem in th...

Claims

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Application Information

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IPC IPC(8): F17C1/10C23C18/36C23C18/18C23G1/08
Inventor 王涛周启雄范俊明周志强刘大云黄瑛
Owner CHENGDU GREAT HIGH PRESSURE VESSEL
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