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     对于防护栏进行浸塑是防腐的方法之一,现在国内比较成熟的作法是:粉末浸塑法,它起源于流化床法,所谓的流化床最初是在温克勒气体发生炉上应用于石油接触分解，进而开发了固气两相接触工艺，后逐渐用于金属涂塑方面。所以有时仍叫“流化床包覆法”，实际过程是把粉末涂料加入底部多孔透气的容器（流动槽）中，由鼓风机从下送入经过处理的压缩空气，使粉末涂料翻动达到“流化状态”。成为均匀分布的细散粉末。
    我们知道流化床是固体流态的第二阶段（第一阶段为固定床阶段，第二阶段为气流输送阶段），在固定床的基础上继续增大流速（W），床层开始膨胀和松动，床层高度开始增加，每个粉末颗粒被浮起，因而离开原来位置作一定程度的移动，这时便进入流化床阶段。bc段说明流化床内粉层膨胀，其高度（I）随着气体速度的增大而增加，但床内压强（△P）并不增大，在一定范围内变动流速而不影响流体所需的单位功率，这是流化床的特征，正是利用这一特点来进行涂装工艺实施的。流化床内粉末流化状态的均匀性是保证涂膜均匀的关键。在粉末涂装上用的流化床属于“竖式流态化”,流化数必需经过试验找出，一般以能够涂敷即可，流化床内粉末的悬浮率最高可达30～50%。
浸塑方法如下：例如:公路防护栏或铁路防护栏经过除油预热到粉末涂料熔融点以上，浸渍到流化床中后塑粉会均匀粘附，然后塑化高分子交联流平成钢塑复合制品。
    Jinsu for fence is one of the anticorrosion method, is now more mature domestic: powder jinsu method, it originated in the fluidized bed method, the so-called fluidized bed was first on the winkler gas generator used in oil contact decomposition, and then developed a gas solid two phase contact process, after gradually used in m e t al plastic coated. So sometimes still called fluidized bed coating method, the actual process is to put the powder coating into porous permeability at the bottom of the container flows (tank), by the blower from the bottom to the compressed air after processing, make the powder coating turn to "fluidization state". Become a uniform distribution of fine powder.
    We know solid flow pattern of fluidized bed is the second phase (phase I to phase fixed bed, the second phase of airflow conveying stage), on the basis of the fixed bed (W) continue to increase flow velocity, bed expansion and loose, bed height increased, each powder particles float, and leave the original position for a certain amount of mobile, has now entered a stage of fluidized bed. BC period of powder in fluidized bed expansion, its height (I) increases with the increase of gas velocity, but the bed (delta P) does not increase, the pressure changes within a certain range of velocity without affecting the fluid power unit, the this is the characteristics of the fluidized bed, it is to use this feature to applied on the 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 "vertical fluidized", fluidization number required after test to find out, generally to coating, powder suspended within the fluid rate of up to 30 ~ 50%.
   Jinsu method is as follows: for example: highway guardrail or rail fence after degreasing preheating to powder coating above the melting point, plastic powder, uniform adhesion after dipping into the fluidized bed, and plasticizing crosslinking polymer flow heisei steel-plastic composite products.
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