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Causes cleaning methods of surface blackening of aluminum alloy workpiece

2020-03-06 11:55:40

Aluminum oxide processing aluminum alloy casting is generally used in metal mold casting, metal aluminum aluminum alloy has a good liquidity plasticity, but in the use of easy to black, the reasons are:


I. unreasonable process design. Improper treatment of aluminum alloy die castings after cleaning pressure inspection created conditions for mold blackening of aluminum alloy die castings accelerated the generation of mold.


Storage management is in place. The mold condition of aluminum alloy die castings is different when they are stored at different heights in the warehouse.


Three, the internal factors of aluminum alloy. Many manufacturers in the die casting aluminum alloy die casting, machining process, don't do any cleaning, simple water, can't do a thorough clean, die-casting aluminum surface residual release agent, cutting fluid, saponification liquid, such as corrosive materials other stains, these stains accelerated the speed of the aluminum alloy die casting mould some black.


Four, aluminum alloy external environmental factors. Aluminum is an active metal, which is easily oxidized to black moldy under certain temperature humidity conditions, which is determined by the characteristics of aluminum itself.


Five, the choice of cleaning agent must be. The selected cleaning agent is highly corrosive, causing corrosion oxidation of die-cast aluminum.

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