アルマイト処理されたアルミニウムシートプレート

Anodized aluminum sheet introduces

The anodic aluminum plate is oxidized and a thin layer of aluminum oxide with a thickness of 5~20 microns is formed on the surface. 硬質陽極酸化皮膜は60~200ミクロンに達します.

アルマイト処理されたアルミニウムプレートにより、硬度と耐摩耗性が向上します, 250~500kg/mm2まで, 良好な耐熱性, 硬質陽極酸化皮膜の融点は2320Kまで, good insulation, breakdown voltage resistance up to 2000V, improve corrosion resistance ω=0.03 NaCl salt spray after thousands of hours without corrosion.

Thin oxide film with a large number of micropores, can absorb a variety of lubricants, suitable for the manufacture of engine cylinders or other wear-resistant parts; The film has a strong adsorption capacity of micropores and can be colored into various beautiful and gorgeous colors.

What are the advantages of anodized aluminum?

What is anodized aluminum used for?

• the plane's automobile components
• 建物の装飾
• マシンシェル
• ランプと照明
• electronic consumer products
• sign

Does anodized aluminum wear out?

Anodized oxidation is permanent because it is actually "grown" from an aluminum-based material. しかし, it can be removed by pickling and can also be worn. Different types of anodic oxidation have different reactions to wear, but they can "wear out". Anodized parts don't break like paint.

Is anodizing aluminum sheet expensive?

The selection of material size is the main factor affecting the cost of anodic alumina components. The larger the size, the larger the surface area, and the higher the materials and facilities needed to make the process successful. 加えて, the increase in the number of parts means an increase in labor and time. These two items translate directly into the price of anodized alumina.

Performance Characteristics of Anodized Aluminum Sheet

1. The good workability: anodic oxidation aluminum sheet has high decorative performance, modest hardness, and can be easily bent and formed. High-speed stamping continuity is convenient for directly processing into products, It does not need to carry out complex surface treatment, greatly shortens the production cycle, and reduces production costs.
2. Good Weathering: anodic oxidation aluminum sheet with standard thickness oxidation film (3μm) is used in long-term discoloration indoors, with no corrosion, no oxidation, そして錆びない. Those with increasing Thick oxidation film (10 μm) can be used outdoor, and long-term exposure to sunlight with discoloration.
3. Strong metal Feeling: the anodized aluminum has a high surface hardness, coming to the gem grade, high resistance to scrape, the surface not having paint covers, keeping aluminum metal color, improving the product level and added value.

Anodized aluminum plate process

1. General process flow

2. High brightness aluminum product process

Aluminum workpiece → mechanical polishing → degreasing → water washing → neutralization → water washing → chemical or electrochemical polishing → water washing → anodic oxidation → water washing → Deion washing → dyeing or electrolytic coloring → water washing → Deion washing → closed → water washing → mechanical brightness

Anodized Aluminum Plate Processing Technology

(1) The general principle of oxidation film formation of anodic aluminum plate:

The process of anodic oxidation of aluminum plate is that aluminum plate is placed in an electrolyte and alumina film is formed on its surface by electrolysis. The cathode in the device is a material with high chemical stability in the electrolytic solutions, 鉛などの, ステンレス鋼, アルミニウム, 等. The principle of anodic oxidation of aluminum is essentially the principle of hydrolysis. When an electric current is passed through, hydrogen is released at the cathode; At the anode, the precipitated oxygen is not only molecular oxygen but also atomic oxygen (○) and ionic oxygen, which are commonly represented in the reaction. As an anode, aluminum is oxidized by oxygen deposited on it, forming anhydrous alumina film. Not all of the oxygen produced interacts with the aluminum; some of it precipitates in a gaseous form.

(2) Selection of electrolytic solution for anodic aluminum plate oxidation:

The pre anodised aluminium sheet film growth is the electrolyte dissolution of the oxide film. しかし, this does not mean that anodic oxidation can produce oxide films in all dissolved electrolytes, or that the resulting oxide films have the same properties.

(3) Anodized aluminum plate oxidation type:

Anodic oxidation is divided into dc anodic oxidation, AC anodic oxidation, and pulse current anodic oxidation according to the current form. The electrolyte can be divided into sulfuric acid, シュウ酸, クロム酸, mixed acid, and sulfonic acid as the main solution of natural coloring anodic oxidation. According to the properties of the film, it can be divided into ordinary film, hard film (thick film), ceramic film, bright modified layer, a semiconductor barrier layer, and another anodic oxidation layer. Common anodic oxidation methods and process conditions of aluminum and aluminum alloys are shown in Table 5. その中で, dc sulfuric acid anodic oxidation is the most common application.

(4) Structure and performance of anodic aluminum oxide film:

The anodic oxide film consists of two layers. The porous thick outer layer grows on top of a dense inner layer with dielectric properties called a barrier layer (also known as an active layer). When viewed with an electron microscope, almost all vertical and horizontal surfaces of the film show tubular holes perpendicular to the metal surface that passes through the outer layer of the film to the barrier between the oxide film and the metal interface. The barrier layer consists of anhydrous alumina, which is thin and dense, has high hardness, and prevents current from passing through. The thickness of the barrier layer is about 0.03-0.05μm, を説明する 0.5%-2.0% of the total film thickness. With each hole as the main axis, the surrounding dense alumina forms a honeycomb hexagonal shape, called the crystal cell. The movie is made up of countless crystalline cells like this. When the electrolyte is sulfuric acid, the sulfate content in the membrane is 13%-17% under normal conditions. The outer layer of the porous oxide film is mainly composed of amorphous alumina and a small amount of hydrated alumina. 加えて, it contains electrolyte cations. Most of the excellent properties of the oxide film depend on the thickness and porosity of the porous outer layer, which is closely related to anodic oxidation conditions.

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