Application of RFH nanosecond solid-state laser in blackening of anode aluminum

Anode aluminum, also known as aluminum oxide, uses aluminum products such as metal aluminum or aluminum alloy as the anode, and stainless steel or lead as the cathode. Under the corresponding electrolyte and specific process conditions, a porous oxide film is formed on the surface of the aluminum product. , To change the surface state and properties of aluminum products, such as surface coloring, to make them have corrosion resistance, wear resistance, decoration and electrical insulation, so as to protect the metal surface.

Therefore, anode aluminum is widely used in medical equipment, 3C electronics, automobile manufacturing, furniture appliances, architectural decoration and other fields. During the application process, material manufacturers often use lasers to mark the surface of anodized aluminum materials with black marks for product identification, anti-counterfeiting, statistics and traceability.

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Anode aluminum blackening is a kind of laser marking. It uses a high-energy-density laser to irradiate the workpiece to further oxidize the surface oxide with a film thickness of 5um-20um and change the surface material mechanism in a very short period of time. Based on the nano-effect, under the action of the laser, the size of the oxide particles is nano-scale, and the light absorption of such a substance increases, so that the visible light is irradiated to the substance and absorbed, and the reflected visible light is very little, so the naked eye observes it as black, which is a physical phenomenon. Processing, can not be altered, with strong anti-counterfeiting properties.

The industrial-grade nanosecond solid-state laser produced by RFH is a reliable laser for anode aluminum blackening. Its output power is greater than 5W, and its pulse width is less than 20ns@50kHz. The narrower the pulse width, the darker the color, that is, the higher the blackness value; the repetition frequency range is wide, which is a single pulse -500KHz; after adjusting the process parameters, the high-speed blackening effect is good, the logo is clear, the lines are fine, the touch is smooth, and the logo has Permanent, will not subside due to environmental changes such as touch, high temperature, acid and alkali, and can be formed at one time without other molds and a lot of manpower, reducing costs and improving work efficiency.