What role does second stage oxidation treatment play on Cree Flashlight? This article will share you some tips. You may know something from the flashlight sellers. When you are choosing flashlights, the seller may tell you the shell has been treated with the second-stage oxidation process which make the shell not easy to get scratched and become harder that that has not been treated. Well, this has stated the main benefit of the second-stage oxidation, but did not tell you why the flashlight shell needs it. "Oxidation process" is a surface treatment way in the aluminum industry. Since both aluminum and its alloys are active in terms of chemical properties, which determines they are easy to get rusty. The second-stage oxidation is to make them not easy to get rusty, and another important benefit is, oxidation can bring an exquisite appearance to the surface.
Strictly speaking, the "oxidation" has little to do with the solidity but can make the surface not easy to get scratched. What determines the hardness is the material itself, for example, aluminum or alloys, what kind of aluminum, etc. The pure aluminum is of very low hardness. Then heat treatment of aluminum is called 'Aging' inline. It heats the aluminum to 380-500 degrees Celsius, keep the stage a while and then let it cool naturally so to increase the hardness. The so-called hard oxygen oxidation process is kind of surface treatment technology, of course, it can only improve the abrasion hardness rigidity but not increase solidity. If a piece of aluminum is not treated, its surface will generate a piece of oxide film, thin, colorless and not abrasion resistant.
Common oxidation process is to electrify the electronic cell to generate an oxide layer which is under control, the thickness can be controlled by the current density and time, there are a lot of benefits than the natural oxide layer, wear-resistant, non-conductive. You can dye (generally black or any color) hard oxygen processing, technology and general principle similar oxygen, but a low temperature and low current density, long time, special electrolyte it can get denser and thicker oxide layer with higher hardness. The problem is, there is no distinct line between general oxidation and hard oxidation, so the US military developed a standard HAII, the third-stage hard oxidation, but many manufacturers do not strictly in accordance with the standards of production. No matter what oxidation process the flashlight adopts, the goal is to protect the shell not easy to be scratched or get rusty and gain a beautiful appearance.
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