Anodizing is a commonly used surface treatment process that forms an oxide film on the metal surface to improve its corrosion resistance and wear resistance. In this process, acid etching additive plays an indispensable role as an important auxiliary agent. It not only affects the formation rate and thickness of the oxide film, but also has an important impact on the final color. So, how does acid etching additive affect the color during anodization? Let's unravel the mystery.

The basic function of acid etching additive

First, let us understand the basic function of acid corrosion additive. During the anodizing process, acid etching additive mainly plays the role of dissolving the oxide film. It can accelerate the formation rate of the oxide film and adjust the thickness and density of the oxide film. In addition, acid etching additive can also change the structure and composition of the oxide film, affecting its optical properties and color.

Effect mechanism on color

The effect of acid corrosion additive on anodizing color is mainly achieved by changing the thickness and composition of the oxide film. During the anodizing process, the thickness and composition of the oxide film determine its reflection and absorption characteristics in the spectrum, thereby affecting the color of its surface. By adjusting the type, concentration and processing parameters of the acid etching additive, the thickness and composition of the oxide film can be changed, thereby controlling the color.

Comparison of the effects of different acid etching additives

Different types of acid etching additives have different effects on anodizing color. Generally speaking, acid corrosion additive containing chromate will make the oxide film appear dark brown or black, while acid etching additive containing sulfate will make the oxide film appear light brown or golden yellow. In addition, there are some special additives, such as organic dyes or metal salts, which can make the oxide film show various other colors, such as red, green or blue.

Optimize the formula and process of acid etching additive

In order to achieve precise control of anodizing color, the formula and process of acid corrosion additive need to be optimized. First, select the appropriate acid etching additive type and concentration, adjusting according to the desired color effect. Secondly, control processing parameters such as temperature, voltage and processing time to ensure the formation of oxide film and color stability. Through these measures, precise control of anodizing color can be achieved to meet application requirements with different needs.

Continuously innovate and explore new possibilities

With the continuous development and innovation of technology, the demand for anodizing colors is also constantly changing and upgrading. Therefore, continuous innovation and exploring new acid corrosion additives and process technologies are one of the future development directions. We look forward to bringing more possibilities and opportunities to the control of anodizing color through continuous efforts and exploration, and making greater contributions to the development and progress of the industry.