Limpeza Física e Química Tratamento da Superfície das Peças

Tratamento de limpeza física e química da superfície das peças

 parts surface treatment method has many kinds, but due to the particularity of electric vacuum device technology, practical ways are very few, mostly derived from experience, theoretical basis is not enough, so, even if is a typical cleaning method, also need to constantly revise and supplement In all kinds of different cleaning methods, general is given priority to with chemical treatment When the usual chemical treatment can not get good expected results or the surface needs to be highly clean, electric processing, such as electrolysis electropolishing electroplating, is used as an auxiliary method. After 950 high temperature treatment, the contact Angle of metal parts with non-saponifiable oil does not change, indicating that high temperature treatment cannot improve the surface cleanliness of parts By comparing the cleaning effects of different cleaning methods, ultrasonic cleaning technology is put forward, adding degreasing liquid into ultrasonic instrument, heating and ultrasonic combined action, not only can remove grease on the surface of parts, but also can remove other impurities, especially for the precision and complex parts In the specific process of ultrasonic cleaning, metal cleaning solution is added to ultrasonic according to the proportion of the formula, ultrasonic frequency is 25 kHz, temperature is 4060, and ultrasonic is 1030 min. Parts are taken out and washed with tap water and pure water successively. After that, parts are put into a container containing acetone, and the container is put into ultrasonic, ultrasonic is 510 Min, take out the parts, rinse with tap water and pure water successively, dehydrate with alcohol after washing, and finally blow dry into the nitrogen cabinet, when ultrasonic acting on the cleaning liquid in the cleaning tank, due to the tearing phenomenon of alternating pressure, vacuum bubble is produced, which rapidly grows up under negative pressure and burst due to the action of strong pressure pressing agent Parts directly into the ultrasonic containing metal cleaning agent, heating to strengthen the activation ability of the liquid, reduce the viscosity and surface tension and ultrasonic cavitation synergistic effect, it is easier to remove the oil and impurities on the surface of the parts after removing the parts using acetone liquid ultrasonic 5-10 min, remove the residual metal cleaning liquid and oil on the surface of the parts In order to guarantee the success of cleaning work, in addition to using the correct method, we think you must ensure that the containers of chemicals have to be very clean, especially its extraction device tool should be more attention For demanding parts, after cleaning need stored in nitrogen gas holder or the vacuum box, prevent oxidation and the dust in the air Adsorption of impurities on its surface During the assembly and welding of parts and pipes, maintain good environmental conditions to reduce contamination of parts surfaces by environment and personnel

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