Since metals have been used, corrosion has been a persistent issue. Choosing corrosion-resistant metal packaging is particularly important.

Post-processing rust prevention treatment for parts surfaces:

1. Surface Pre-Cleaning (Pre-Treatment): Magnesium alloy products, after processes such as die casting or forging, are prone to contamination from oxides, lubricants, and oils on their surfaces. The purpose of pre-treatment is to clean the magnesium alloy surface to facilitate subsequent processing. The cleaning is primarily done using two methods:

①Mechanical Cleaning: Achieve the required surface roughness through various methods such as different abrasives, coarse polishing, dry and wet abrasive jetting; ②Chemical Cleaning: Achieve different surface conditions through solvent cleaning, alkaline washing, and acid washing.

2. Passivation Treatment: Passivation treatment utilizes a non-electrolytic chemical reaction between the metal surface and the solution to produce an insoluble, inorganic salt surface film. Its purpose is not only to enhance corrosion resistance but also to serve as a base for painting, thereby increasing the adhesion of the coating.

3. Anodizing Treatment: Anodizing can produce an anodic oxide film, significantly enhancing corrosion resistance and creating a metallic luster texture with aesthetic decorative properties. The oxide film also serves as a base for subsequent painting, increasing the adhesion of the coating. If the subsequent sealing process is well-executed, the resulting dense...

The dense oxide layer enhances surface hardness and corrosion resistance.

4. Electroplating Treatment: Electroplating technology can alter the surface color and appearance of magnesium alloy materials to achieve the desired functional and decorative purposes. Generally, to enhance the adhesion of the electroplated layer, several pretreatment steps are performed prior to the electroplating process, such as zinc replacement, copper replacement, and non-electroplated nickel.

5. Metal Coating: Metal coating can further prevent corrosion and enhance the mechanical properties and hardness of the surface, thereby achieving the goal of selecting lightweight magnesium alloys under special environmental conditions.

6. VCI Corrosion Inhibiting Paper: The magnesium alloy corrosion inhibiting paper utilizes the VCI corrosion inhibition principle. By wrapping the metal surface with corrosion inhibiting paper packaging, these products are all equipped with a volatile function. When they are covered or in close proximity to metal products in a relatively sealed space, they automatically emit corrosion inhibiting ions based on the ambient temperature and humidity. These corrosion-inhibiting molecules fill the entire sealed packaging space, maintaining a dynamic saturation state, effectively reducing the corrosiveness of the environment on the metal, and thereby achieving the goal of preventing metal corrosion.