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Highway road fence anti-corrosion methods and coating process



Highway road fence anti-corrosion methods and coating process

highway road fence


Highway road fence usually anti-corrosion methods is powder plastic immersion method.
Powder plastic immersion method It originated in the fluidized bed method,the so-called fluidized bed was originally on the winkler gas generator is applied to decompose oil contact,then develop the gas solid two phase contact process,then gradually used in metal plastic coated.So sometimes it still called “fluidized bed coating method”,Actual process is to put the powder coating into the container which is porous permeability at the bottom,by the blower from next to the compressed air after processing,to powder coating flip "fluidization state", become a uniform distribution of fine powder.

 

Highway road fence coating process
Highway road fence coating process are done by two stages:the first stage for fixed bed stage,the second stage for airflow conveying stage,on the basis of the fixed bed continue to increase velocity,bed began to swell and loose,bed height increased,each powder particles float,Leave the original position for a certain amount of movement,then it entered a stage of fluidized bed.BC stage indicate that the powder layer within fluidized bed expansion,ts height increases with the increase of gas velocity,but the pressure in the bed does not increase,Within a certain scope changes in flow velocity without affecting the fluid power unit.This is the characteristics of the fluidized bed,just use this to finish coating process,the uniformity of powder fluidization state in the fluidized bed is the key to ensure uniform coating.on the powder coating with fluidized bed belongs to the "upright fluidization,fluidization number required  test to find out,general can coating is workable,the suspension rate of the  fluidized bed can reach 30~50%.

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