1. Appearance inspection: Check whether the tin material is intact, whether there are obvious crystalline, powdery, fibrous and other foreign objects, and whether there are drag marks, spots and other phenomena.

　　2. Wet tensile test: Check the tensile strength, elongation at break, and modulus at break of the tin material.

　　3. Wet bending test: Check the bending strength and fracture modulus of the tin material.

　　4. Hot tempering test: Check the heat resistance of the tin material.

　　5. Resistivity test: Check the resistivity of the tin material.

　　6. Corrosion resistance inspection: Detect the corrosion resistance of the tin material, check whether there is agglomeration and corrosion phenomenon in the tin material.

　　7. Surface corrosion resistance test: Check the surface corrosion resistance of the tin material and check for any corrosion marks on the surface.