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Metal surface treatment during painting

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Metal surface treatment during painting

  • Categories:News Center
  • Author:Chuangzhi Coating
  • Origin:Attractivechina
  • Time of issue:2019-09-27
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(Summary description)For metal castings, our common surface treatment methods are mechanical grinding, chemical treatment, surface heat treatment, spray surface, surface treatment is to clean, clean, deburr, degrease, deoxidize the surface of the workpiece. The surface treatment of metal is also particularly important in the coating process, which is related to the quality and effect of the coating. Next, I will give you a detailed introduction to the metal surface treatment during the painting process.

Metal surface treatment during painting

(Summary description)For metal castings, our common surface treatment methods are mechanical grinding, chemical treatment, surface heat treatment, spray surface, surface treatment is to clean, clean, deburr, degrease, deoxidize the surface of the workpiece. The surface treatment of metal is also particularly important in the coating process, which is related to the quality and effect of the coating. Next, I will give you a detailed introduction to the metal surface treatment during the painting process.

  • Categories:News Center
  • Author:Chuangzhi Coating
  • Origin:Attractivechina
  • Time of issue:2019-09-27
  • Views:
Information

    For metal castings, our common surface treatment methods are mechanical grinding, chemical treatment, surface heat treatment, spray surface, surface treatment is to clean, clean, deburr, degrease, deoxidize the surface of the workpiece. The surface treatment of metal is also particularly important in the coating process, which is related to the quality and effect of the coating. Next, I will give you a detailed introduction to the metal surface treatment during the painting process.

1. The importance of pre-treatment of metal coating

Metal surface treatment

    For metal anti-corrosion coatings, there are many factors affecting the performance of the coating, such as coating composition, coating form, substrate surface pretreatment, coating structure, coating method, coating quality monitoring and coating post-treatment, etc. The reasons are divided into four categories: improper selection of coating system accounted for 20%; substrate surface treatment is not ideal 40%; coating thickness is not enough or unevenness accounted for 20%; coating management and process irrational accounted for 20%. This shows the importance of metal surface treatment.

2. Metal substrate pretreatment purpose

Metal surface treatment

(1.) The bonding strength (adhesion) of the reinforced coating (paint film) to the metal surface of the object to be coated. The pretreatment methods include: mechanical roughening, chemical reaction film formation, chemical (physical) adsorption, preparation of transition layers, and combinations. Effect, etc.

(2.) Improve the protection (preservative) performance of the coating on the substrate, such as coating the steel after galvanizing;

(3.) Create good conditions for the flatness (fullness) of the coating, and improve the appearance and decoration of the coating, such as scraping putty.

3. Metal pre-treatment content

(1.) Structural processing

    Sharp angles, spatters, welding slag, welding holes, etc., chamfering to reduce stress concentration.

(2.) Surface cleaning

    Oxide (rolling), rust, soluble salts, oils and fats, insoluble solids, moisture (excluding water-based paints), etc.

(3.) Surface roughness

    Improve the roughness and increase the mechanical bite of the coating and the substrate. If the roughness is too large, the convex portion may cause the partial coating to be too thin, and the residual bubbles in the pit will cause the coating to fail prematurely. Generally, the control roughness is preferably 1/10 of the thickness of the coating.

surface treatment of metal

4. Ideal surface pretreatment effect

(1.) no grease (more important for waterborne coatings), no rust products (sometimes unrecognizable to the naked eye), no dirt;

(2.) a surface of the substrate having a certain roughness;

(3.) Add a layer of chemical conversion film (such as: phosphating film, coupling agent, phytate film, etc.), transition layer (aluminum alloy type),Anodized film, etc.

    The above is about the "metal surface treatment in the painting process" related content, then, I will introduce the "influencing factors of metal surface pretreatment" related information, welcome to pay attention to us to get updated information!

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Guangdong Chuangzhi Intelligent Equipment Co., Ltd. has a registered capital of 30 million and a self-funded site area of ​​approximately 36000 square meters. It is a high-tech enterprise integrating pre-sales whole plant planning, independent research and development, design, manufacturing, installation, commissioning and after-sales service. (GR20184404259), which owns Guangdong Chuangzhi Machinery Equipment Co., Ltd., Guangdong Ruizhaofeng Software Information Technology Co., Ltd., and Hong Kong Chuangzhi Mechanical Equipment Engineering Co., Ltd., and has obtained more than 130 patents in the field of coating equipment and environmental protection equipment. Based on the Industry 4.0 intelligent manufacturing cloud service and the industrial Internet platform, combined with the three major digital factory management systems of MES, ERP, and PDM, it realizes the remote management, quality control and production traceability tracking of the coating production line manufacturing process, and provides customers with high-quality, efficient, intelligent, Environmentally friendly services, so that customers have no worries when using Chuangzhi products. With 26 years of experience in 3D digital overall solutions for coating production lines, we provide customers with all kinds of non-standard automated coating production lines, coating equipment, environmental protection equipment and other whole plant solutions. At present, it has been widely recognized in the automotive industry, furniture industry, musical instrument industry, cookware industry, home appliance industry, industrial equipment industry and rail transit industry. 

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