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We'll show you how to anodize Titanium very quickly and easily with materials that are easy to find.
Anodizing is a process where a layer is built up on the surface of certain metals (titanium, niobium, tantalum, aluminum, magnesium and zinc) by heating, chemicals, or electricity. In the case of titanium, the coating that is constructed is a layer of titanium dioxide.
We will anodize by electricity, using a benchtop source of direct current ranging from 0 to 120 volts.
The process, as already mentioned, is obtained through an electrochemical reaction and the name anodizing comes from the fact that the material to be coated acts as the anode. The part is first submerged in an electrolytic solution, together with another material that will be the cathode. The cathode can be a rod of carbon, nickel, lead, stainless steel, or any other conductive material that will not react with the bath.
When current passes through the solution, which is acidic, hydrogen from the cathode is released and also forms of oxygen from the surface of the anode are released. The reaction of these elements forms a film on the surface of the material being treated.
Depending on the anodizing process and the desired application for this material, this oxide layer can be expanded to a thickness of up to 100 times greater than the layer that would naturally form on the metal, reaching up to 100 µm.