Single plating type zinc-aluminum-magnesium-rare earth protection coating with high corrosion resistance and preparation technology

A zinc-aluminum-magnesium, high-corrosion-resistant technology, applied in hot-dip plating process, metal material coating process, coating, etc., can solve the problems of inability to form a high-performance permeable layer, high process requirements, and uneven coating surface. Achieve the effect of overcoming the difficulty of plating aid, high bonding strength and excellent corrosion resistance

Active Publication Date: 2015-11-18
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the deficiencies and problems of hot-dip galvanized aluminum-magnesium in the prior art, such as high process requirements, uneven coating surface, and inability to form a high-performance infiltrated layer, the invention provides a high-content aluminum and magnesium coating suitable for metal materials. , The thickness of the coating conforms to the standard, high bonding strength, high corrosion resistance, high corrosion resistance single-coated zinc-aluminum-magnesium rare earth protective coating and preparation process suitable for industrial promotion and production

Method used

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  • Single plating type zinc-aluminum-magnesium-rare earth protection coating with high corrosion resistance and preparation technology
  • Single plating type zinc-aluminum-magnesium-rare earth protection coating with high corrosion resistance and preparation technology

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Experimental program
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Effect test

Embodiment 1

[0030] Embodiment 1: A kind of highly corrosion-resistant single-plated zinc-aluminum-magnesium rare earth protective coating comprises the steps of:

[0031] 1) Decontaminate the dirt on the surface of the metal material, wash the metal material 3 times with NaOH solution and clear water at 85°C, and remove the grease on the surface of the metal material;

[0032] 2) Carry out grinding and derusting treatment on the metal material after the treatment in step 1), and the derusting level is not lower than Sa2 1 / 2 class;

[0033] 3) The single-plating flux is ZnCl 2 30%; NaF1%; KHF 2 5%; PCl 3 0.5%; SnCl 2 2%; BeCl 2 1%; SiO 2 0.5%; ZnMnO 4 0.05%; composite surfactant 1%, the rest is water, of which ZnMnO 4 The function is to form hydrates with other components to promote the hot-dip plating process; the composite surfactant is a compound of alkyl sulfonate, fatty alcohol ether phosphate, and N-alkyl aminodipropionic acid. and step 2) place the treated metal material in...

Embodiment 2

[0038] Embodiment 2: A kind of highly corrosion-resistant single-plated zinc-aluminum-magnesium rare earth protective coating comprises the following steps:

[0039] 1) Decontaminate the dirt on the surface of the metal material, wash the metal material 3 times with NaOH solution and clear water at 80°C, and remove the grease on the surface of the metal material;

[0040]2) Carry out grinding and derusting treatment on the metal material after the treatment in step 1), and the derusting level is not lower than Sa2 1 / 2 class;

[0041] 3) The single-plating flux is ZnCl 2 35%; NaF2%; KHF 2 6.5%; PCl 3 0.75%; SnCl 2 2.5%; BeCl 2 1.2%; SiO 2 1%; ZnMnO 4 0.075%; composite surfactant 1%, the rest is water, of which ZnMnO 4 The function is to form hydrates with other components to promote the hot-dip plating process; the composite surfactant is a compound of alkyl sulfonate, fatty alcohol ether phosphate, and N-alkyl aminodipropionic acid. and step 2) place the treated metal...

Embodiment 3

[0046] Embodiment 3: A kind of highly corrosion-resistant single-plated zinc-aluminum-magnesium rare earth protective coating comprises the steps of:

[0047] 1) Decontaminate the dirt on the surface of the metal material, wash the metal material 3 times with NaOH solution and clear water at 85°C, and remove the grease on the surface of the metal material;

[0048] 2) Carry out grinding and derusting treatment on the metal material after the treatment in step 1), and the derusting level is not lower than Sa2 1 / 2 class;

[0049] 3) The single-plating flux is ZnCl 2 40%; NaF3%; KHF 2 8%; PCl 3 1.0%; SnCl 2 3%; BeCl 2 1.5%; SiO 2 1.5%; ZnMnO 4 0.1%; composite surfactant 1%, the rest is water, of which ZnMnO 4 The function is to form hydrates with other components to promote the hot-dip plating process; the composite surfactant is a compound of alkyl sulfonate, fatty alcohol ether phosphate, and N-alkyl aminodipropionic acid. and step 2) place the treated metal material i...

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Abstract

The invention discloses a single plating type zinc-aluminum-magnesium-rare earth protection coating with high corrosion resistance and a preparation technology. According to the single plating type zinc-aluminum-magnesium-rare earth protection coating technology, a zinc-aluminum-magnesium alloy coating can be acquired on a metal surface with a single hot dipping method; respective original performance of the coating and a metal matrix are kept, but the coating and the metal matrix form a metallurgical bonding interface of more than 99.9%, meanwhile, the coating is compact in structure, has stable components and excellent corrosion resisting performance and avoids skip plating, and salt-spray corrosion reaches 2,060 h; the corrosion resistance of the alloy coating is better than that of a common hot dipping pure-zinc coating, and the service life is prolonged. The single plating type technology can be reused and applicable to industrial production, overcomes defects that assistant plating of metal and a zinc-aluminum-magnesium alloy liquid is difficult, an excellent metallurgical bonding interface between the metal and the zinc-aluminum-magnesium alloy liquid is difficult to form, the probability of skip plating is high and the like, and can be widely applicable to preparation of a zinc-aluminum-magnesium alloy plating solution containing 5%-12% of Al and 1%-6% of Mg on the metal surface; a prepared co-penetrated layer forms Zn/Al/MgZn2 ternary eutectic and multiple types of binary eutectic, and the eutectic is the major reason for guaranteeing high corrosion resistance of the co-penetrated layer.

Description

Technical field: [0001] The invention relates to the technical field of steel material surface coating technology, in particular to a highly corrosion-resistant single-coated zinc-aluminum-magnesium rare earth protective coating and a preparation process. Background technique: [0002] The galvanized protective layer of the traditional metal substrate is affected by the deterioration of the natural environment and the electromagnetic environment of the transmission line, and the corrosion rate is accelerating, which greatly shortens its service life. In heavy corrosion environments (such as coastal areas, acid rain areas, industrial pollution areas, etc.), It has to be replaced as a whole, which greatly increases the maintenance cost and reduces the safety of the power grid. Especially in the electromagnetic field environment such as strong electric field and lightning strike, the electromagnetic effect will aggravate the corrosion of the coating. The zinc-aluminum-magnesiu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C2/06C23C2/02
Inventor 郭凯李辛庚岳增武傅敏王晓明闫风洁王学刚曹建梅李晓宇
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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