magnesium aircraft parts
Magnesium alloys are widely used in fields including automobile and aircraft parts manufacturing. This material is not only light, but also very strong, but also has obvious defects such as susceptibility to corrosion and wear.
As a result, equipment made from this material has a shorter lifespan and is expensive to repair or replace.
To provide protection for the material, researchers are developing a coating that will protect magnesium alloy parts and structures from erosive environments and will not resist corrosion.
However, the coating is prone to small holes and microcracks, so it does not fully protect machine parts from corrosion if exposed to erosive conditions for a long time.
This polymer material is used in daily life for non-stick coating tableware, heat resistance, cold resistance, good elasticity and water resistance. In addition, it is chemically more stable than all known synthetic materials, free from acid and base.
The researchers applied the composite coating to the magnesium alloy samples in a novel way: using a plasma electrolysis oxidation (PEO) technique and then spraying the polymer.
The surface of the alloy is coated with a ceramic-like PEO coating, then the pores and surfaces of the coating are evenly sprayed with ultra-dispersed Teflon powder, and the samples are dried in an oven at 300 degrees Celsius
The resulting coating is only a third as blemishes as PEO’s, because the polymer seeps into small holes and micro-cracks, sealing it. Under the protection of composite coating, magnesium alloy samples are more resistant to corrosion than untreated materials. If sprayed repeatedly, the protection will be stronger.