Al-cr coating preparation and surface micro-deformation method and al-cr coating surface micro-deformation device

A micro-deformation, al-cr technology, applied in the coating, metal material coating process, hot-dip plating process, etc., to achieve the effect of improving corrosion resistance, dense coating structure, and refined grains

Active Publication Date: 2021-01-26
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to provide a kind of method for preparing the Al-Cr coating that has excellent corrosion resistance and the device of surface micro-deformation thereof, to overcome the defect of above-mentioned existing hot-dip aluminized coating

Method used

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  • Al-cr coating preparation and surface micro-deformation method and al-cr coating surface micro-deformation device
  • Al-cr coating preparation and surface micro-deformation method and al-cr coating surface micro-deformation device

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preparation example Construction

[0047] refer to figure 1 A method for preparing an Al-Cr coating with excellent corrosion resistance adopts the above-mentioned device for micro-deformation of the surface of a Al-Cr coated steel plate, comprising the following steps:

[0048] Step 1: Preparation of a Cr coating on the surface of the steel plate. The Cr coating is prepared on the surface of the steel plate by electroplating, the pure lead plate is used as the anode, the steel plate is used as the cathode, the area ratio of the cathode and the anode is 1:2, and the electroplating solution is 230g / L~250g / L CrO 3 and 1.2g / L~1.5g / L H 2 SO 4 Mixed aqueous solution, electroplating temperature is 60°C, current density is 5A / dm 2 ~10A / dm 2 , the electroplating time is 5 minutes to 15 minutes, and the thickness of the prepared Cr coating is 1 μm to 10 μm.

[0049] Step 2: Preparation of the Al coating on the surface of the Cr-coated steel sheet. First, the Cr-coated steel sheet is subjected to a fluxing treatment...

Embodiment 1

[0060] The steel plate material is Q235 low carbon steel, and the sample size is 20mm×10mm×1mm.

[0061] Step 1: Before preparing the Cr coating by electroplating, use 400#, 800#, 1200#, 2000# SiC sandpaper to grind the Q235 steel plate material step by step, 80 ° C, 20% NaOH + 5% Na 2 SiO 3 +10%Na 2 CO 3 (wt%) mixed aqueous solution for 10min degreasing treatment, 25 ℃, 10% HCl solution for 3min descaling treatment, then use cleaning, drying for later use. When the Cr coating is prepared by electroplating, pure lead is used as the anode, the area ratio of the cathode and the anode is 1:2, and the electroplating solution is 240g / LCrO 3 and 1.3g / LH 2 SO 4 Mixed aqueous solution, electroplating temperature is 60°C, current density is 10A / dm 2 , the electroplating time is 10min, and the thickness of Cr coating is 5μm. Then the Cr-coated steel plate was dehydrogenated at 200 °C for 1 h.

[0062] Step 2: In preparing the Al coating by hot-dipping method, the plating flux is...

Embodiment 2

[0066] The steel plate material is Q235 low carbon steel, and the sample size is 20mm×10mm×1mm.

[0067] Step 1: Before preparing the Cr coating by electroplating, use 400#, 800#, 1200#, 2000# SiC sandpaper to grind the Q235 steel plate material step by step, 80 ° C, 20% NaOH + 5% Na 2 SiO 3 +10%Na 2 CO 3 Mix the aqueous solution for 10 minutes of degreasing treatment, and 25 ℃, 10% HCl solution for 3 minutes of derusting treatment, then use it, wash it, and dry it for later use. When the Cr coating is prepared by electroplating, pure lead is used as the anode, the area ratio of the cathode and the anode is 1:2, and the electroplating solution is 230g / LCrO 3 and 1.2g / LH 2 SO 4 Mixed aqueous solution, electroplating temperature is 60°C, current density is 5A / dm 2 , the electroplating time is 5min, and the thickness of Cr coating is 1μm. Then the Cr-coated steel plate was dehydrogenated at 200 °C for 1 h.

[0068] Step 2: In the preparation of Al coating by hot-dipping m...

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Abstract

The invention discloses an Al-Cr coating preparation method and a surface micro-deformation device and an Al-Cr coating surface micro-deformation device. The method firstly prepares a Cr coating on the surface of a steel plate by an electroplating method, and the prepared Cr coating can be used as a barrier layer , hinder the interdiffusion between Al / Fe elements, reduce the thickness of the Fe-Al intermetallic compound layer, and can also be used as a diffusion element to improve the corrosion resistance of the coating. Then, an Al coating is prepared on the surface of the Cr-coated steel sheet by a hot-dip aluminum plating method to obtain an Al-Cr coating. Finally, through the micro-deformation of the surface of the Al-Cr coated steel sheet, the compactness of the Al-Cr coating is enhanced, thereby further improving the corrosion resistance of the Al-Cr coated steel sheet.

Description

technical field [0001] The invention belongs to the technical field of metal material surface engineering, and in particular relates to an Al-Cr coating preparation and surface micro-deformation method and an Al-Cr coating surface micro-deformation device. Background technique [0002] In daily life, metal corrosion has caused huge economic losses to the country and the people, and even caused catastrophic accidents. Therefore, the importance of metal corrosion protection has become increasingly prominent. Among many anti-corrosion technologies, coating technology is the most direct and simple one. [0003] Aluminum coating can form a layer of dense Al on the surface of the steel plate in a corrosive environment. 2 o 3 film, so that the coated steel plate has good corrosion resistance. At present, the common preparation methods of aluminum coatings include: magnetron sputtering method, embedding method, hot-dip plating method, etc. Among them, the equipment required by ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F17/00C25D3/04C23C2/12C23C2/26C23C2/40
CPCC23C2/12C23C2/26C23C2/40C23F17/00C25D3/04
Inventor 赵雪妮杨璞王瑶张伟刚刘庆瑶陈雪岩桂珍珍郑佳梅
Owner SHAANXI UNIV OF SCI & TECH
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