1.Pitting corrosion:Pitting corrosion, also known as pore corrosion, is a highly localized corrosion pattern of needle-like, point-like, and hole-like shapes on metal.
2.Galvanic corrosion:Galvanic corrosion is also a characteristic corrosion form of aluminum. The natural potential of aluminum is very negative. When aluminum is in contact with other metals, aluminum is always at the anode to accelerate its corrosion.
3.Crevice Corrosion:Crevice corrosion is caused by the difference of the gas-filled battery, which causes the corrosion in the gap to accelerate, and there is no influence outside the gap.
4.Intergranular corrosion:Intergranular corrosion means that pure aluminum does not prosper intergranular corrosion, alloying elements or intermetallic compounds precipitate along the grain boundary, and the anode is a corroded battery with respect to the crystal grains, causing the intergranular corrosion to accelerate.
5.Filamentous Corrosion:Filamentous corrosion is a kind of under-film corrosion that develops under the film in the form of worms.
