What are the reasons that affect the quality of the anodized surface of the aluminum flame detector housing parts

With the development of society and the advancement of science and technology, equipment manufacturers have higher and higher requirements for the internal quality and appearance of the parts of the quality Aluminum flame detector housing. In order to meet the increasing internal quality and appearance requirements, quality Aluminum flame detector housing manufacturers improve the internal quality and appearance quality of parts of quality Aluminum flame detector housing through various methods.

In production practice, the external quality of the aluminum flame detector housing is often improved by anodizing surface treatment process. After the anodization treatment, the surface of the quality Aluminum flame detector housing can form an anodized film with a certain thickness, strength and beauty. Through electron microscope observation, it can be found that the structure of the anodic oxide film is honeycomb, and there is a micropore in the center that grows perpendicular to the surface of the aluminum substrate, showing the beauty of modeling that cannot be seen in other surface treatments. Then the anodized film is electrolytically colored and sealed to obtain a unique and exquisite color. The anodized film has stable performance and long-term durability. Therefore, anodization is a common application in the production and processing of aluminum alloy shell parts.
The anodizing process can form a film with a certain thickness, strength and certain characteristics on the surface of the quality Aluminum flame detector housing, without changing the original shape of the part. In order to obtain a very aesthetic appearance, it is required that the surface of the parts before anodizing should reach a certain degree of smoothness, and the surface should be clean and free of other impurities.
However, during the anodizing process of the quality Aluminum flame detector housing, due to various factors, the oxide film appears uneven, and the anodizing effect is not ideal.
The research results show that the factors affecting the quality of the anodized film are in the following aspects: the influence of the chemical composition of the alloy in the aluminum material. In order to improve the mechanical properties and chemical properties of aluminum alloys, a small amount of copper, silicon and iron are usually added to aluminum. After the alkali etching treatment, aluminum is first dissolved, while copper, silicon and iron remain on the surface to form "gray", resulting in uneven anodic oxide film, affecting the reflectivity, color and corrosion resistance of the oxide film. Influence of foreign impurities in aluminum. The "metallic streaks", "tail marks" and "streaks" produced during rolling become apparent after anodizing. Influence of rolling process. After rolling, the grain size and shape of aluminum change, and after alkali etching treatment, the surface is rough due to preferential etching, which affects the quality of the oxide film. The effect of heat treatment. During the failure treatment, the main purpose is to optimize the mechanical properties, and the grain size changes greatly, which is not conducive to the production of a uniform anodic oxide film. Mold effect. The roughness of the die surface directly affects the surface roughness of the extruded aluminum profile.
Due to the defects and impurities in the quality Aluminum flame detector housing before the anodizing treatment, during the surface anodizing treatment, the current on the surface will be uneven, and the flow speed of the electrolyte will vary, resulting in uneven surface of the anodized treatment. Condition, formation and distinct black streaks. Due to the presence of impurities on the surface of the anodized treatment, the anodized film is uneven, which affects the reflectivity, color and corrosion resistance of the oxide film, and directly affects the quality of the anodized treatment. Too high magnesium will affect the transparency of the film; too high silicon will make the color of the film change from colorless and transparent to gray, purple and finally black. The color is dark and not bright, and the bonding ability of the anodized film and the substrate is reduced, resulting in cracks on the surface of the film. Studies have shown that the quality Aluminum flame detector housing itself has streak defects and impurities, resulting in black streaks in some places after anodized surface treatment, and the color is dark and not bright, which directly affects the beauty of the aluminum alloy housing.
Due to the presence of impurities in the quality Aluminum flame detector housing before treatment, it was not completely removed in time after alkali washing, and the "stripe" defects generated during the rolling process were not completely removed during polishing, resulting in insufficient current flow during surface anodizing treatment. Uniform, resulting in black dots and streamlined stripes of silver and black with a certain direction on the surface of the oxide film.
In order to improve the surface quality of the aluminum flame detector housing, while further optimizing the anodizing process, it is necessary to do a good job of quality inspection inside and outside the quality Aluminum flame detector housing before oxidation treatment, and strictly control the aluminum composition, rolling production, heat treatment process and molds and other links It provides a good quality Aluminum flame detector housing for anodizing, which lays a solid foundation for ensuring the quality of anodizing.