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A processing technology of oil pipeline

A processing technology, oil pipeline technology, applied in metal material coating process, superimposed layer plating, coating and other directions, can solve the problem of metal ions not being effectively supplemented, uneven thickness distribution of electroplating layer, uneven current distribution, etc. problem, to achieve the effect of not easy to conduct electricity, not easy to change color, and wide range of current density

Active Publication Date: 2018-03-13
NINGBO YADA METAL SURFACE TREATMENT
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Although the corrosion resistance of metal parts is often improved by electroplating in the prior art, when the oil pipeline is electroplated, the structure of the oil pipeline is complicated, the wall thickness is uneven, the current density of the inner wall is small, the current distribution is uneven, the fluidity of the plating solution is poor, and the metal ions are not obtained. To effectively supplement, so the ordinary electroplating process is prone to uneven thickness distribution of the electroplating layer, poor corrosion resistance, weak bonding force, etc.

Method used

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  • A processing technology of oil pipeline

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Effect test

Embodiment 1

[0033] The alloy steel is processed and formed to obtain the oil pipeline blank; the composition elements and mass percentages of the alloy steel are: C: 0.15%, Cr: 1.4%, Si: 0.18%, Mn: 0.95%, Al: 0.04 %, N: 0.012%, Ti: 0.15%, P≤0.015%, S≤0.018%, and the balance is Fe and unavoidable impurities.

[0034] The oil pipeline blank is electroplated in a zinc-nickel electroplating solution at 25°C by an auxiliary anodic plating process; the composition of the electroplating solution is: zinc oxide 6g / L, sodium hydroxide: 120g / L, nickel: 0.8g / L , Additives: 220ml; wherein, in the auxiliary anode plating process, an external anode is arranged outside the oil pipeline blank, a porous plastic mesh is arranged inside the oil pipeline blank, and an auxiliary anode is arranged inside the porous plastic mesh, and the auxiliary anode is connected with the external anode by a wire; The auxiliary anode plating is carried out in three stages: the first stage, the current density is 4.3A / dm 2 ,...

Embodiment 2

[0038] The alloy steel is processed and formed to obtain the oil pipeline blank; the composition elements and mass percentages of the alloy steel are: C: 0.16%, Cr: 1.38%, Si: 0.22%, Mn: 1.08%, Al: 0.042 %, N: 0.001%, Ti: 0.18%, P≤0.015%, S≤0.018%, and the balance is Fe and unavoidable impurities.

[0039] The oil pipeline blank is electroplated in a zinc-nickel electroplating solution at 28°C by an auxiliary anodic plating process; the composition of the electroplating solution is: zinc oxide 6g / L, sodium hydroxide: 125g / L, nickel: 0.7g / L , Additive: 280ml; Among them, in the auxiliary anode plating process, an external anode is arranged outside the oil pipeline blank, a porous plastic mesh is arranged inside the oil pipeline blank, and an auxiliary anode is arranged inside the porous plastic mesh, and the auxiliary anode is connected with the external anode by a wire; The auxiliary anode plating is carried out in three stages: the first stage, the current density is 4.4A / dm ...

Embodiment 3

[0043] The alloy steel is processed and formed to obtain the oil pipeline blank; the composition elements and mass percentages of the alloy steel are: C: 0.12%, Cr: 1.5%, Si: 0.15%, Mn: 1.15%, Al: 0.03 %, N: 0.008%, Ti: 0.22%, P≤0.015%, S≤0.018%, and the balance is Fe and unavoidable impurities.

[0044] The oil pipeline blank is electroplated in a zinc-nickel electroplating solution at 30°C by an auxiliary anodic plating process; the composition of the electroplating solution is: zinc oxide 7g / L, sodium hydroxide: 130g / L, nickel: 1g / L, Additive: 300ml; wherein, in the auxiliary anodic plating process, an external anode is provided outside the oil pipeline blank, a porous plastic mesh is arranged inside the oil pipeline blank, and an auxiliary anode is arranged inside the porous plastic mesh, and the auxiliary anode is connected with the external anode by a wire; The auxiliary anodic plating is carried out in three stages: the first stage, the current density is 4.5A / dm 2 , t...

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Abstract

The invention relates to a processing technique of an oil delivery pipe, belonging to the technical field of alloy processing. The technique comprises the following steps: machining alloy steel to obtain an oil delivery pipe blank; carrying out electroplating treatment on the oil delivery pipe blank in a 20-30-DEG C nickel-electroplating solution by an auxiliary anode electroplating technique, wherein the electroplating solution is composed of 5-7 g / L zinc oxide, 110-130 g / L sodium hydroxide, 0.6-1 g / L nickel and 150-300ml of additive; sequentially carrying out polishing treatment, passivating treatment and rust prevention treatment on the electroplated oil delivery pipe blank to obtain an oil delivery pipe semifinished product; and carrying out seal treatment on the oil delivery pipe semifinished product to obtain the oil delivery pipe finished product. The oil delivery pipe has reasonable component combination; and under the synergistic actions of the component elements, the zinc-nickel alloy is electroplated on the surface by the auxiliary anode electroplating technique, the passivating treatment and rust prevention treatment are then carried out, and finally, the seal treatment for silanization treatment is carried out to further enhance the corrosion resistance and mechanical properties of the oil delivery pipe.

Description

technical field [0001] The invention relates to a processing technology of an oil delivery pipe, which belongs to the technical field of alloy processing. Background technique [0002] Steel is used in various aspects of industrial production and life. It plays a very important role in human life and work. It is the basis of scientific and technological development. However, steel is easy to rust in the atmosphere and the corrosion process is quite complicated. Different degrees of adverse effects on life, resulting in unnecessary economic losses. In my country, according to the 2008 survey results of the China Industrial and Natural Environment Corrosion Investigation Project Team, the direct economic loss caused by corrosion reached 230 billion yuan, and the indirect economic loss was 500-600 billion yuan, which was equivalent to 100% of my country's gross national product in that year. 5%. Therefore, it is very important to study methods to prevent steel corrosion. [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/18C22C38/02C22C38/04C22C38/06C22C38/14C25D3/56C23C22/53C25D5/48C23C22/62C23C28/00C23C22/42
CPCC22C38/001C22C38/02C22C38/04C22C38/06C22C38/14C22C38/18C23C22/42C23C22/53C23C22/62C23C28/321C23C28/34C25D3/565C25D5/48
Inventor 董阿能
Owner NINGBO YADA METAL SURFACE TREATMENT
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