My current research is dealing with creating rough copper surfaces with certain attributes. Because the performance of the copper substrate is reliant on this specific surface topography, I am looking to determine how these features may change over time in different environments. Of particular interest is the effect of a biological environment, as well as the effect of air at room temperature. I have already done some research about the effect of a biological environment on copper surfaces and have concluded that in general corrosion occurs, but am unsure how a roughened surface would impact this effect. Any ideas or references is greatly appreciated.
The rougher the metal surface, the larger the contact surface of corrosive media and the stronger and more quickly the corrosion. This is a general rule for most cases. In addition, corrosion of the rough surfaces is intensified by prolonged retention of water in depressions. In individual cases, this effect can lead to pitting corrosion. Another characteristic of the corrosion of rough surfaces is the condition of corrosion products: the rough the surface, the thicker the layer of corrosion products can be and the better this layer adheres to the metal.
Haidyn Ogg ,
Vadim Verlotski provided a great answer in regards to surface area. Typically more available surface area, the higher corrosion rates (kinetics plays a role) and products.
Ways to measure the surface area are by absorption and microscopic techniques (BET isotherm, profilometry, microscopes, etc.). This should be able to give you a quantify your roughness and see how the corrosion products are effected by the different mediums.
Good luck!
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