The chromic acid anodic oxidation method is mainly used for the processing of high-precision precision parts. The oxide film obtained is thick (2-5 μm). The film is soft and has good toughness. It can maintain the original precision and finish of the parts and basically does not reduce the fatigue strength of the raw materials.

The chromic acid oxidation solution can also check metallurgical defects such as grain size and fiber direction cracks of the material. Due to the low dissolution rate of aluminum products, it is commonly used in the aviation industry for the oxidation of aluminum parts with high strength and precision of the engine, such as rotor blade bushings, wheels, etc. It may also be used for other precision parts of aluminum products. Oxidation treatment. Due to the strict water treatment requirements of chromic acid, the application of this method is limited.

Chromic acid anodic oxidation formula and process are as follows:

Chromate (Cr03) 5%～10%

Voltage 40V

Current density 0.3 ~ 1A/dm2

Temperature 30～45°C

When the anodic oxidation using chromic acid method, it is appropriate to use distilled water to prepare, the chloride ion content must be strictly controlled below 0.02%.

Multi Channel Pipette

Compared with single-channel pipettes, multi-channel pipettes simplify all the tasks associated with microtiter plates that often occur in immunology, biochemistry, clinical diagnosis and food analysis. Multi-channel pipettes generally have 8 and 12 heads. The gun body can be rotated at 360°C, and each part can be disassembled and repaired separately. The lower half can be sterilized at 121°C. The dimpled housing ensures a firmer grip for the operator. Can be quickly calibrated.

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