We can provide additional sealing for parts with increased sealing requirements. Leak testing can be performed using two methods. The pressure drop method in a control system or the immersion method in a testing medium, e.g., water.
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Owing to the fact that pressure die castings made of aluminum and zinc alloys are essentially a mixture of metal and dissolved gases, in certain cases an impregnation process should be considered.
With a well-designed and properly sealed component manufactured using pressure die casting technology, it is possible to withstand pressure without leakage of up to approximately 20 bar.
Impregnation technologies for aluminium and zinc castings are primarily based on immersion methods, where the sealing agent interacts with all surfaces of the part. Consequently, a visible presence should be expected for example, as a white residue.
The number of castings tested from a given batch mainly depends on the inspection method specified by the customer. In the case of leak testing using the pressure drop method, individual parts are tested selectively or at regular intervals. The immersion method, on the other hand, allows for the inspection of every single piece in a large batch.
Leak testing is carried out in specific cases. Especially when aluminum or zinc alloy cast parts are used in systems where the working medium is supplied under high pressure. This applies, for example, to automotive gas installations or pneumatic brake systems in vehicles.For example, automotive gas systems, or vehicle air brake systems.
