1. Strong restoring ability. During the welding process of china 5052 aluminum plate, the oxide film will hinder the good bonding between metals, and it is easy to cause slag inclusion.

2. Single phase. Aluminum has a face-centered cubic lattice, has no allotropes, and cannot refine grains through phase transformations.

3. High stomata sensitivity. The liquid molten pool of the aluminum plate is easy to absorb gases such as hydrogen, and a large amount of gas dissolved at high temperature will not be precipitated in the process of cooling and solidification after welding, and will form pores when it accumulates in the weld.

4. High thermal conductivity and specific heat capacity. During the welding process, a large amount of heat is quickly transferred to the inside of the base metal, so when welding aluminum and aluminum alloys, the heat is not only consumed in the molten metal, but also in other parts of the metal.

5. The thermal cracking tendency is large. During the welding process, the volume shrinkage rate of aluminum when solidified is relatively large, and shrinkage cavities, shrinkage porosity, thermal cracks and high internal stress are easily generated during welding.

6. No color change during solid liquefaction. When the molten pool metal of china 5052 aluminum plate is welded from solid to liquid, there is no obvious color change, which brings inconvenience to the welding operation.