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Hot-dip coating alloy containing aluminum, silicon, zinc, rare earth and magnesium and preparation method thereof

A hot-dip plating and alloy technology, applied in hot-dip plating process, metal material coating process, coating and other directions, can solve the problems of contact corrosion, loss of anti-corrosion effect, wear, etc., to improve the performance of anti-contact corrosion, solve Contact corrosion problems, the effect of expanding the application

Active Publication Date: 2010-12-29
JIANGSU LINLONG NEW MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, although some achievements have been made in the prevention of contact corrosion of titanium alloys at home and abroad, there are certain problems in the current methods, mainly because the coating layer used is easy to lose the protective effect under the synergistic effect of environment and stress. Conventional methods on the surface of titanium alloys The plating coating is easy to peel off under the contact load, and it is easy to lose the anti-corrosion effect. The peeled off fragments cause abrasive wear between the contact parts and aggravate the failure of the parts. Therefore, a large number of titanium alloy fasteners in the aircraft are urgently needed. Need to address failures due to contact corrosion

Method used

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  • Hot-dip coating alloy containing aluminum, silicon, zinc, rare earth and magnesium and preparation method thereof
  • Hot-dip coating alloy containing aluminum, silicon, zinc, rare earth and magnesium and preparation method thereof
  • Hot-dip coating alloy containing aluminum, silicon, zinc, rare earth and magnesium and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0042] The hot-dip alloy is made of aluminum, silicon, zinc, magnesium, rare earth elements and TiO 2 Composed of nano-oxide particle reinforcement, the percentages of each component to the total mass are: silicon content: 8-24%, zinc content: 1.2-3.1%, rare earth element content: 0.02-0.5%, magnesium content: 0.5-3.2% %,TiO 2 Content: 1 to 2%, the balance is aluminum, see the following table 1 for details:

[0043] Table 1: The mass percentage content (%) and related index parameters of each component in the total weight

[0044]

Embodiment 2

[0046] The hot-dip alloy is made of aluminum, silicon, zinc, magnesium, rare earth elements and CeO 2 Composed of nano-oxide particle reinforcement, the percentages of each component to the total mass are: silicon content: 8-24%, zinc content: 1.2-3.1%, rare earth element content: 0.02-0.5%, magnesium content: 0.5-3.2% %, CeO 2 Content: 1 to 2%, the balance is aluminum, see the following table 2 for details:

[0047] Table 2: The mass percentage content (%) and related index parameters of each component in the total weight

[0048]

Embodiment 3

[0050] The hot-dip alloy is composed of aluminum, silicon, zinc, magnesium, rare earth elements and nano-oxide particle reinforcing agent, wherein the nano-oxide particle is TiO 2 and CeO 2 , and TiO 2 and CeO 2 The ratio is 1: (1-3), and the percentages of each component to the total mass are: silicon content: 8-24%, zinc content: 1.2-3.1%, rare earth element content: 0.02-0.5%, magnesium content: 0.5% ~3.2%, TiO 2 and CeO 2 The total content of aluminum alloy: 1~2%, the balance is aluminum, see the following table 3 for details:

[0051] Table 3: The mass percentage content (%) and related index parameters of each component accounting for the total weight

[0052]

[0053] In embodiment 1-3, preferably, wherein each component accounts for the total mass percentage as follows: silicon content: 12-20%, zinc content: 1.5-2.5%, rare earth element content: 0.1-0.3%, magnesium content: 1 ~2.5%, the total content of nano-oxide particle reinforcement: 1.2~1.8%

[0054] Mor...

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Abstract

The invention relates to a hot-dip coating alloy which is especially used for surface coatings of titanium alloy parts. The hot-dip coating alloy comprises the following components in weight percentage: 8-24% of silicon, 1.2-3.1% of zinc, 0.02-0.5% of a rare-earth element, 0.5-3.2% of magnesium, 1-2% of a nano-oxide particle reinforcing agent, and the balance of aluminum and unavoidable impurities, wherein the nano-oxide particle reinforcing agent is chosen from one or two of TiO2 and CeO2. The hot-dip coating alloy obtained in the invention can form the coating with good corrosion resistance and good wear resistance on the surface of a titanium alloy, wherein the coating is in good metallurgical bond with a matrix.

Description

technical field [0001] The invention relates to a hot-dipping alloy containing aluminum-silicon-zinc-rare earth-magnesium for surface coating of titanium alloy parts and a preparation method thereof. Background technique [0002] Titanium alloy has the advantages of high strength and strong corrosion resistance, so it has become an important aerospace material. The use of titanium alloy is of great significance to reduce the weight of the aircraft and improve the performance of the aircraft. However, titanium alloy itself has good corrosion resistance. However, when it is in contact with aluminum alloy and alloy steel, under the synergistic effect of stress and environment, it is prone to contact corrosion and lead to failure. [0003] Contact corrosion is a kind of galvanic corrosion, that is, dissimilar metals are in contact in the same medium. Due to the different metal potentials, the metal with a lower potential dissolves faster, resulting in localized corrosion at th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/12C22C1/02C22C21/02
Inventor 冯立新张敏燕张平则
Owner JIANGSU LINLONG NEW MATERIALS CO LTD
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