With the rapid development of the aluminum alloy industry, in order to improve the corrosion resistance of Aluminum Die Casting Components, the aluminum alloy needs to be surface treated after extrusion and die casting. The pretreatment process is very important to the corrosion resistance of Aluminum Die Casting Components. Passivation is an important process in pre-treatment, and special aluminum alloy passivators are generally used. So how to construct a reasonable pretreatment process? Share with you below.

If the passivation process of Aluminum Die Casting Components is unreasonable, it will affect the efficiency and quality of the entire production line. So what kind of process flow is reasonable? According to the company's main products, general aluminum alloy passivation can be divided into four processes.

Process 1: pre-degreasing, main degreasing, water washing, water washing, whitening and descaling, sonic cleaning and rinsing, water washing, activation, water washing, water washing, passivation, water washing, water washing, drying. This is a relatively complete process, which is widely applicable to different passivation environments and aluminum alloy products.

Process 2: The technological process after the polishing of Aluminum Die Casting Components: degreasing-water washing-water washing-activation-water washing-water washing-passivation-water washing-water washing-water washing-drying. If the workpiece is mechanically polished, the color of the film layer is required to be natural, and the requirements for corrosion resistance are not high. For example, the neutral salt spray test takes about 48-72 hours and can be used.

Process three: degreasing-washing-washing-passivation-washing-washing-drying. On the basis of the above, if the workpiece is well drained, the structure of the workpiece is relatively simple.

Process four: degreasing-washing-passivation-washing-drying.

The above is the passivation process of Aluminum Die Casting Components with different conditions and requirements, but each enterprise can make appropriate adjustments according to its own actual situation and product quality requirements when using it. There is no need to copy everything, and the process can be flexibly adjusted according to different product requirements.