Aluminum oxide aluminum alloy casting is usually made of metal casting. Aluminum and aluminum alloys have good fluidity and plasticity, but they can be blackened in the process of use.
(1) unreasonable process design.The aluminum alloy die casting parts were not handled properly after cleaning or pressure inspection, and the condition was created for the mould and blackening of aluminum alloy die casting, which accelerated the production of mould.
(2) the warehouse management is not in place.Storing aluminum alloy die casting parts at different height of the warehouse, the condition of mould is different.
(3) internal factors of aluminum alloy.Many manufacturers in the die casting aluminum alloy die casting, machining process, don't do any cleaning, or simple water, can't do a thorough clean, die-casting aluminum surface residual release agent, cutting fluid, saponification liquid, such as corrosive materials and other stains, these stains accelerated the speed of the aluminum alloy die casting mould some black.
(4) external environmental factors of aluminum alloy.Aluminum is active metal, which can be easily oxidized to black or mouldy under certain temperature and humidity conditions, which is determined by the characteristics of aluminum itself.
(5) the cleaning agent should not be used.The choice of cleaning agent is highly corrosive, resulting in the corrosion oxidation of die casting aluminum.
