People must conduct visual inspection on batches of defective aluminum alloy die castings to see whether the surface of the castings has caused uneven surfaces on some parts. The reasons for friction and crevice corrosion in the production and processing of aluminum alloy die castings are given: (1) The position and appearance of the inner runner caused by the die casting mold are not good; (2) Due to the forging standard, the aluminum alloy profile is strongly corroded by the liquid Insufficient water cooling. The methods to deal with and avoid frictional crevice corrosion are: (1) Improving improper pouring in the position and direction of the inner runner; (2) Increasing the water cooling standard and increasing the level of strong corrosion of metal materials is very important; (3) Improving the crevices of architectural coatings Corrosion; (4) Adjust the water flow of the aluminum alloy liquid to avoid cavitation. (5) Remove the adhesion of the aluminum alloy on the grinding tool. There is crevice corrosion in the production and processing of aluminum alloy die castings! Don't worry, you can reasonably prevent such situations from happening according to the left and right methods.