Micro-Grooving of Aluminum, Titanium and Magnesium Alloys by Acidithiobacillus Ferrooxidans Bacteria
Micro-grooving technology through using renewable natural sources has been presented in this work. Applying bacteria is known for many years as the main removal tool of metal, such as copper and tin as well as plastics; so called ‘Biomachining’. Micro-grooving is critically important for the fields of electronics and medicine. Within this work, biological micro-grooving by Acidithiobacillus Ferrooxidans bacterium (A.F), as an innovative method for different metals, has been used in precise industries such as aerospace and electronic, including pure magnesium, magnesium alloy E21, titanium alloy Vt20 and aluminum alloy. Comparing the recognized advantages and disadvantages of the proposed method for each metal showed that A.F bacteria in the medium causes metal surface removal and very fine surface grooves through applying special tools. However, the tool may lack any surface collision and create the solution including bacteria in desired size and shape at the surface. It is also demonstrated that removal in titanium and aluminum alloys is pretty low due to oxide coating. It is also possible to groove pure magnesium and magnesium alloy surface by width of 0.05 mm.
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