Researchers have performed different corrosion tests such as potentiodynamic, electrochemical impedance spectroscopy, immersion and salt spray to explore the corrosion rate.
In addition to the methods you mentioned, the Gravimetric (Weight Loss) Test method can also be used. This test method measures how much weight loss the corrosion causes on the material over a certain period of time. It is a simple and effective method to understand the long-term effects of corrosion on Al-Si based composites. The weight loss of the material can be measured by corroding the samples for a certain period of time and then cleaning the corrosion products.