Surface Treatment Technology in Sheet Metal Working

sheet metal processing is an important metal working process, which is widely used in various industries, such as automobile manufacturing, electronic equipment, mechanical equipment and so on. In the process of Sheet metal processing, surface treatment technology plays a vital role, which not only improves the appearance of sheet metal products, but also enhances their properties such as corrosion resistance, abrasion resistance and insulation.

First, the common surface treatment technology in sheet metal processing

1. Spraying

Spraying is a widely used surface treatment method. The paint is atomized and evenly sprayed on the surface of sheet metal products by spray gun to form a protective film. Spraying can be done by selecting different paints according to different needs, such as anti-rust paint, decorative paint and so on. After spraying, the surface of the sheet metal products is smooth and even in color, with good decorative effect and protective performance.

2. Electroplating

Electroplating is the process of plating a layer of other metals or alloys on a metal surface using the principle of electrolysis. Electroplating can improve the surface hardness, wear resistance, corrosion resistance and electrical conductivity of sheet metal products. Common plating methods include zinc plating, chromium plating, nickel plating, and so on. After plating, the surface of sheet metal products is bright and beautiful, and has high added value.

3. Anodizing

Anodizing is a treatment method in which metal products are used as anodes and electrolyzed in an electrolyte solution to form an oxide film on their surface. Anodizing can improve the corrosion resistance, abrasion resistance, insulation and other properties of sheet metal products, and also change their surface color and luster. Anodic oxidation of sheet metal products after the high surface hardness, bright color, with good decorative effect.

4. Sandblasting

Sandblasting is the use of high-speed jet sand particles on the surface of sheet metal products for impact and friction, so that the surface becomes rough, thereby increasing the adhesion of paint. Sandblasting can remove impurities such as oil, rust and oxidized skin on the surface of sheet metal products to improve the surface quality. The surface of the sheet metal products after sandblasting is uniform and rough, which is conducive to the subsequent surface treatment.

Second, the principle of selection of surface treatment technology

1. Selection according to the usage environment

Different environments require different surface properties of sheet metal products. For example, sheet metal products used in humid and corrosive environments should be selected with good corrosion-resistant surface treatment technologies, such as electroplating, anodizing, etc.; sheet metal products used in high temperature and high pressure environments should be selected with good heat resistance and pressure resistance surface treatment technologies, such as spraying ceramics.

2. Selection according to product requirements

Different products have different requirements on surface performance and appearance. For example, for products with high appearance requirements, surface treatment technology with good decorative effect should be selected, such as spraying, plating, etc. For products with special properties, such as abrasion resistance, insulation, etc., the corresponding surface treatment technology should be selected, such as anodic oxidation, spraying of special coatings.

3. Selection according to cost and efficiency

Different surface treatment technologies have different costs and efficiencies. When choosing surface treatment technology, cost and efficiency factors should be taken into account to choose the surface treatment technology that can meet the requirements of the product and has a high cost-effective.

Third, the development trend of surface treatment technology

1. Environmental protection

With the increasing awareness of environmental protection, environmentally friendly surface treatment technology will become the future development trend. For example, water-based coatings, chromium-free plating, green anodizing and other technologies will gradually replace the traditional surface treatment technology to reduce environmental pollution.

2. Intelligent

With the continuous progress of science and technology, intelligent surface treatment technology will be widely used. For example, automated spraying equipment, intelligent plating production line will improve production efficiency and product quality, reduce labor costs.

3. Multifunctionalization

Future surface treatment technology will be developed in the direction of multifunctionalization. For example, a surface treatment technology can simultaneously have corrosion resistance, wear resistance, decorative and other properties to meet the needs of different products.

In short, surface treatment technology is an indispensable part of sheet metal processing. Choosing the right surface treatment technology can improve the quality and performance of sheet metal products and meet the needs of different industries. With the continuous progress of science and technology, surface treatment technology will also continue to innovate and develop, bringing more opportunities and challenges to the sheet metal processing industry.