The metal pipe is placed or sprayed in a dilute solution containing phosphoric acid and soluble phosphate to be properly treated to form an insoluble, well-adhering phosphate film on the metal surface. This process is called phosphating or phosphoric acid of the metal pipe. Salt treatment. Phosphate film can increase the adhesion and protection of anti-corrosion coatings and metal pipes. According to the main components of the phosphating solution, there are zinc, zinc-calcium, manganese, manganese-zinc and iron. Different types of treatment solutions can obtain phosphate membranes with different thicknesses and different properties. Use the conditions to make the appropriate selection. The phosphating treatment process is generally: chemical removal → hot water washing → cold water washing → pickling → cold water washing → phosphating treatment → cold water washing → phosphating post treatment → cold water washing → deionized water washing → drying. In the phosphating treatment of metal pipelines, “comprehensive treatment†is the development trend, that is, the combination of degreasing and phosphating to produce deoiling-phosphating “two-in-one†treatment liquid; or derusting-deoiling - Phosphating is combined to produce a "three-in-one" treatment liquid, thereby greatly reducing the cost of pretreatment. At present, countries are participating in research in this direction. Concerned about surprises Label: Phosphating metal pipe Adhesive properties Degreasing Metal surface Previous: PCB backplane design and testing points Next: Introduction and influencing factors of metal surface ultrasonic degreasing technology 3020 SMD LED supplier from China White 3020 SMD LED, Red 3020 SMD LEDd, Blue 3020 SMD LED, Green 3020 SMD LED, Yellow 3020 SMD LED Shenzhen Best LED Opto-electronic Co.,Ltd / BESTSMD CO LIMITED(HK) , https://www.bestsmd.com
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In this catalog, we mainly introduce the 3020 SMD LED of visible light. 3020 SMD LED, size is 2.8*3.5mm. For this SMD LED, we can supply all kinds of visible wavelength and color on it. such as: purple LED, blue LED, cyan LED, lime LED, green LED, Yellow LED, Amber LED, Orange LED, red LED, deep red LED, red grow light LED , white LED, warm white LED, Pink LED and so on.
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